33-maxim-max4173x.pdf

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W LE W WW .100Y.C M.TW AVAILAB T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 O W M .10 OM W.1 General Description Features WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW O Current-Sense Solution W M TheOMAX4173 low-cost, precision, high-side O currentW o Low-Cost, W.1 Y.C W .C amplifier Y.C WW .100Compact .TW W is available 0 WWin a tiny T . sense SOT23-6 package. 0 WW .100Y T M . 1 M . O W M O Weliminates o High +2V to +28V Common-Mode W ItYfeatures output that Y.C .CO a.Tvoltage Y.C the need WW Accuracy .TW W WW .TWfor 100 00today’s WW .100gain-setting M . 1 Range, Functional Down to 0V, Independent of M . O resistors and it is ideal for notebook W M W O W W W .CO Y.C W W 0 Y W T . W 0 0 W T Supply Voltage phones, and other systems where cur. 1 0 0Y.C Mcell WW .10computers, T M . . .1 O W OM O W W rentYmonitoring is critical. High-side W .Cmonitoring Y.C Available WW current C W . 0 Y W W W o Three Gain Versions 0 0 W T . 1 0 0 W M.T . .T in battery-powered 1systems,Osince M . is0especially useful it O 1 W M . W C W W .C battery +20V/V Y. .CO WW (MAX4173T) interfere 0Ythe WW path .TW 0of 0Ynot WW does M.T .100 .TWwith the ground 1 0 M . O 1 W M . +50V/V (MAX4173F) O W C The range of 0 to O input common-modeW Wcharger. .C+28V is.TW Y. .C WW (MAX4173H) .TW W and ensures 100 00Y that M WW independent M . .TW +100V/V ofMthe supply voltage the 1 00Y . O 1 W . O .C O W WWeven00when viable Y.C con- .TWo ±0.5% Full-Scale WW .1Accuracy .TW 00Y 0Y.C feedback WW current-sense TW remainsW M . 1 0 M . O 1 W M . nected battery in deep discharge. The MAX4173’s W O W toYa.C CO W 0Y.C (MAX4173T) WWOffset.10Voltage W makes it suitable 0Y.inside WW for TW . 0 WWwide .1.7MHz o ±3mV Input T use M.T . 1 00 bandwidth M . O 1 W M O W C . O W charger control loops. W Y battery WWBandwidth WW .100Y.C M.ToWWide 1.7MHz WW .100Y.C M.TW M.T .100 (MAX4173T) O W O W C Oof three gain versions The combination Y. W and 0a0userY.C WW WW .TW Y.C 420µA Supply Current .oTW 100 Wselectable M . .TW resistor W 1 00external sense sets the full-scale M . O 1 W M . O W .C O feature offers a high W W Y.C WW .100YSOT23 current .TW o.T Available in Space-Saving Package WWlevel.1of00inte0Y.CThis M WW reading. TW M . 0 M O 1 W . Wcurrent- O gration, in O a simple and compact Wresulting WW .100Y.C M.TW W Y.C WW .100Y.C M.TW 0 WWsolution. T sense . 0 1 . W OM WW 00Y.CO .TW .CO .TW W+28V C . Y W WW 0operates W 0 Y W TheW MAX4173 from a single +3V to sup0 .1 .T M .10 OM Circuit Typical OM420µA of supply current WW Operating W.1draws ply, typically only W .CO .TW Y.C WW over C . 0 Y W W W 0 0 Y W W M.T .1 .T 10to 00 M . the extended operating temperature range (-40°C O 1 W M . O W O W .C WWVSENSE .100Y.CILOAD M.TW +85°C), and is offered space-saving WWSOT23 .TW 00Y 0Y.C inMthe WW .TW 1 0 0 TO +28V M . O 1 W . O W package. W O WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW RSENSEW O O W W Applications W Y.C WW 00Y.CO .TW C . 0 W W W 0 Y W 1 0 W M.T . .T 1 RS+ RSM . O W +3V TO +28V M .10 NotebookWComputers O W C . O W W Y VCC W WW .100Y.C M.TW WW .100Y.C MSystems M.T .100 .TW Portable/Battery-Powered O W O W 0.1µF C .CO .TW WW .100Y. WW Packs/Chargers .TW WW .100Y.C M.TW SmartW Battery M 00Y O 1 W M . Functional Diagrams O W O W WW .100Y.C M.TW Cell Phones WW .100Y.C M.TW MAX4173T/F/H WW .100Y.C M.TW W O W .CO .TW O W Power-Management Systems WW .1LOAD/ 00Y WW .100Y.C A/DM.TW OUT WW .100Y.C M.TW OM General System/Board-Level O Current Monitoring WW WW BATTERY W CO W .CONVERTER Y.C C W . 0 Y W W W 0 0 Y W T GND . W M.T .1 .T 10 00 M . O 1 PA Bias Control W M . O W C W .CO .TW WW .100Y. .TW WW .100Y.C M.TW WW Sources M Precision Current 00Y O 1 W M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.Ordering TW WW .100Y.C M.TW Information O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W 0 (V/V)M.T W .1 MARK OM M W PART TEMP RANGEW.1 PIN-PACKAGE SOT TOP .10GAIN O O W W C . W C W . 0Y.C M.TW Y 6 SOT23 W AABN W W -40°C to W 0 0 Y T . 1 0 0 T . . MAX4173TEUT+T W 20 +85°C 1 0 O W OM W. OM W.1 WW — .100Y.C M.TW MAX4173TESA+ WW .100Y.C8 SO M.TW WW .10020Y.C M.TW -40°C to +85°C O W O W O W 50 MAX4173FEUT+T -40°C to +85°C AABO W 0Y.C M.TW WW 0 WW .100Y6.CSOT23 T . 1 WW .100Y.C M.TW . M O MAX4173FESA+ 50 -40°C to +85°C WW 8 .SO —W CO W Y WW .100Y.C WW 00Y.CO .TW 0 W T . 0 W 1 MAX4173HEUT+T SOT23 AABP W M 1 OM -40°C to +85°C WW. 6 Y W.100 .CO .TW C . W—W W W 0 Y W MAX4173HESA+ 100 -40°C to +85°C 8 SO 0 0 W .T 1 0 M . 1 M . O W Pin Configurations appear at end of data O +Denotes a lead(Pb)-free/RoHS-compliant package. WWsheet. WW .100Y.C M.TW 0Y.C M.TW Functional Diagrams continued atW end of data 0sheet. 1 T = Tape and reel. . W WW 00Y.CO .CO .TW WProducts, UCSP is a trademarkappear of Maxim Integrated Inc. Y W 0 Pin Configurations at end ofW data sheet. 0 W.1 OM W.1 WW WW .100Y.C M.TW O W Y.C 0 WW information, .TW contact Maxim Direct 0 For pricing, delivery, and ordering Mplease .1 O W C Y. 19-1434; Rev 5; 4/11 WW website at 1-888-629-4642, or visit Maxim’s .100 at www.maximintegrated.com. W W W

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 M .1 M .10 MAXIMUM WW 00Y.CO .TW .CO .TW WW RATINGS CO Y W WW 00Y.ABSOLUTE W 0 W M .1Power Dissipation M to +30V .10 VCC,O RS+, -0.3V Continuous M.TRS- to GND .......................................... A = +70°C) .CO .T(TW WW W.1 Y .CO Y WW 00-0.3V C W . 0 Y W W + 0.3V) OUT to GND .............................................. to (V 8-Pin SO (derate 5.88mW/°C above +70°C)............... 471mW W 0 W T CC . 1 0 W T M . . 1 0 . O above +70°C)................. 696mW W(derateY8.7mW/°C M OM W ......................... to VCC or GND SOT23-6 OShort-Circuit W.1 Output W W 0 .C Range Y.C Continuous WW Temperature .T WVoltage (VRS+ 0 0 Y.C W-W T . VRS-) ............................. ±0.3V Input Operating .......................... -40°C to +85°C 1 0 WW .100Differential T M . . 1 M . O W M O ±20mA W .C ............................ W CurrentO into Any Pin......................................................... Storage Temperature -65°C to +150°C YRange WW .TW WW .100Y.C M .TW 100(soldering, WW .100Y.C M.TW M . Lead Temperature 10s) ................................ +300°C O W O W .C ...................................... O W Temperature +260°C WW .TW 00Y(reflow)M WW .100Y.C M.TW Soldering 1 WW .100Y.C M.TW . O W O W C . W .CO those Y.C may cause WW to the.1device. TWratings only, and functional 00Y These are listed under “Absolute WWMaximum .TWpermanent damage WW Stresses M.stress .TW 100Ratings” 00Y beyond M . O 1 W M . O operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to W C W W .CO rating Y.C WW .100Y. TW . W 0 Ymaximum WW periods T conditions for extended may affect device reliability. . 0 0 WW absolute T M . 1 0 O W OM W. OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW WW 00Y.CO .TW W WW 00Y.CO .TW .CO .TW W Y W 0 WWELECTRICAL W.1 Y.COM W MCHARACTERISTICS .10 W.1 Y.COM W O W W W C . 00 (VRS+ = 0 to +3V to +28V,W VSENSE = 1 ∞ unless .otherwise noted..T Typical values are at Y+28V, VCC.=TW 00TA = TMINMto.TTMAX, RLOAD =W WW .0V, W 1 Y.COM W .100 (NoteO O W +25°C.) 1)M TA =W W C . W C W W .T W 00 0Y W WW .100Y. M.T OM MAX UNITS W.1MIN Y.CTYP M.T SYMBOL WW.10 O PARAMETER CONDITIONS O W W C . .C W W .TW 0YPSR testM.TW 1300 0by W M . .TW VCC W 1 00Y Range . Operating.1Voltage Guaranteed 28 V O W M O W O W W WW 0.100Y.C M.T Y.C Range.TWVCMR (Note WW2) .100Y.C M.TW Common-Mode 28 V WW .100Input O W M O W C . O W W C W . Y W C W . W Common-Mode VRS+ dB WCMR 00 90 M.T W > +2.0V.100Y .T 0Y WW .10Rejection O 1.0 W.1 0.42 M.T ICC OM W C . O W W C Supply W Current V > +2.0V, V > 12V mA W . Y W RS+ CC C W Y W .T W 00 Y. W W .10=028V OM.T W.1 0.3Y.COM M.IT .100 Leakage Current VCC = 0V, VW 3 µA RS+, IRSRS+ O W W C . W W 0 Y W TW . 0 0 W T . 1 0 WW .100Y.C M.TW M . VRS+ > +2.0VW.1 0 W O50 OM W W W 0Y.C 50 M.TW Y.C W-350 WW 00Y.CO I.RS+ W VRS+ ≤W 0 0 T . +2.0V 1 0 W T . M .1 O W Input Bias Current W.1 Y.COM W VRS+ > +2.0V W Y.C100 .TµA WW 00Y.CO .TW 0 0W W W 0 W 1 0 W M . .T 1 0 IRSM . O 1 W M . O W C . O W VRS+ ≤ +2.0VW -700 Y.C WW .100Y100 M.TW W .TW WW .100Y.C V M.TW V 100 M . O mV W Full-Scale Sense Voltage = V V 150 O W SENSE SENSE RS+ RSO W W Y.C WW .100Y.C M.TW 0 WW VCC T . 0 WW .100Y.C M.TWVSENSE = +100mV, = +12V, V = +12V ±0.5 5.75 1 M RS+ O W O W. O W WW .100Y.C M.TW 0Y.CVRS+M WW VCC.=10+12V, TW VSENSE = +100mV, = .+12V, WW .100Y.C M.TW O 0.5W 3.25 O W W Y.C WW .100Y.C M.TW WW 00Y.CO .TTAW= +25°C WW 0 T . 0 W M Total OUT Voltage Error .1 O W=.1+28V,YV.RS+ 0.5 OM VSENSE = +100mV, VW WW 5.75 W CO= +28VTW CC Y.C % .TW C . 0 W W (Note 3) W 0 0 Y W . 1 W M .T 00 M .10 VRS+ =O+0.1V = +100mV, VCC W = +12V, -9WW.±24 .CO .TW W.1 Y.COMVSENSE .C Y W W 0 Y W W W 0 0 W T . W M .1 .T= +12V, VRS+ = +12V,WV.SENSE 10 = +6.25mV 00 VCC OM ±7.5 WW .CO .TW W.1 Y.COM C . Y W W 0 Y W W (Note 4) W 0 W .T 00 W 00 W.1 Y.COM W M.T W.1= 28V,Y.COM W W W.1 Y.COMAX4173T, W V = +3.0V, V W W CC RS+ .T W 0.8 1.2 M.T .100 .T=W250mV W W.100 00 M O 1 W M . O V C SENSE . O W W W Y W WW .100Y.C M.TW WW .100Y.CMAX4173F, M.T .100 .TWVCC = +7.5V, O W M V = 28V, O RS+ W C . O W W -V Y W Out High Voltage (Note 5) W(V ) W WW .100Y.C M.TW 0.8 W 1.2 .10V0Y VSENSE =.T 250mV 0 .C W CC .10OH M.T O W M O W .C W W .C W .CO .TVW .TW 0.8 W1.2 W.100Y OM.TW CC = +15V, VW RS+ = 28V, 00Y WW .100YMAX4173H, 1 M . M O W O = 250mV W VSENSE WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W TA =W +25°C 5WW Y.C W1.2 .CO .TW 0 Y.C WW 0MAX4173TEUT, 0 0 Y W T . 1 0 0 W M .1 VRS+ = 0.89V, mV. OUT Low Voltage VOL .1 VCC = +5V,M WW W V Y.C=O0mV .CO .TW WWto +85°C Y W W T = -40°C 40 W A 0 W SENSE W .T 00 M .10 W.1 Y.COM W WW 00Y.CO .TW W W W .T 00 W.1 Y.COM W.1 Y.COM W W W W 00 W .T 00 W.1 W.1 Y.COM W W W W W 2 Maxim Integrated M.T .100 O W C . W W Y W .T 00 W.1 Y.COM W W 00 W.1 W W

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 M .1 M .10 WW 00Y.CO .TW WW 00Y.CO (continued) CO W W WW 00Y.ELECTRICAL W W T CHARACTERISTICS . .T M .1 W.1 Y.COM W OM W W.1 Y(V.C .CO= 0V,.T WtoW VCC = +3V +28V, V TAW = TMIN to TMAX , RLOAD =00 RS+ = 0 to +28V, SENSE Y W W .T noted. Typical values are at W 0 W 1 ∞ unlessOotherwise 0 W M . .T(Note 1) 1 00 TA = +25°C.) M . 1 W M . O W O W .C WW .100Y.C M.TW WW .TW CONDITIONS 00Y WW .100Y.C PARAMETER .TW 1 SYMBOL MIN TYP MAX UNITS M . M O W O WW 00Y.CO .TW W W WW .100Y.C M.TW 1 WW .100Y.C M.TW M . MAX4173T, O 1.7 O W=W+100mV W Y.C WW 00Y.CO .TW C VSENSE . 0 W W .TW W 0 Y W 1 0 W T M . . 1 0 M . O W W OM W.1 W .CO MAX4173F, WW .100Y.C M.T1.4 WW .V1RS+ 00Y= +12V,M.TW WW .100Y.C M.TW O = +100mV V W SENSE O W C W .C .CO .TW +12V, BWW VCC = MHz WW .100Y. .TW W .TW MAX4173H, 00Y WW Bandwidth M 1 00Y M . O 1 W M . O CLOAD = 5pF W C . O W W 1.2 C W . W VSENSE W .T = +100mV.100Y WW .100Y WW .100Y.C M.TW M.T OM W O W C . O W W C +6.25mV 100Y .TW WW .100Y. .TW VSENSE =W WW .100Y.C M.TW M . 0.6 M O W O W C (Note 4) . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W MAX4173T 20 O W C .C W WW .100Y. 50M.TW WW 00Y.CO .TW A WMAX4173F .TW 00Y WGain V/V 1 V M . 1 W M . O W .CO .TW O W W C . Y W C W . 0 Y W W W MAX4173H 00 100 0 W .T W .T 00Y W.1 Y.COM W W.1 Y.COM W W W.1 Y.COM W W 0 W W .T MAX4173T/F W W .10 0.5 OM±2.5 .T 10V0SENSE =OM.TTA = +25°C 00 . 1 W M . W C +10mV to +150mV, ∆A . O W V .C W WW .100Y .TW W=WVRS+ .=112V 00Y WW .100Y.C M.TW M4.0 T.AT= -40°C to +85°C VCC M O W O W C O W W % .C Gain Accuracy WW .100Y. WW V .100Y .TW WW .100Y.C M.TW M.T M MAX4173H W TA = +25°C 0.5 .CO±2.5 SENSE = W O O W .C WW .100Y .TW +10mV WtoW+100mV, .TW 00Y WW .100Y.C M.T∆AWV M 1 M . O W OTA = -40°C to +85°C VCC = VRS+ =W 12V O W WW .100Y.C 4.0M.TW WW .100Y.C M.TW WW .100Y.C M.TW O A = +25°C O V Input Offset Voltage MAX4173TEUT, WW 0.300Y.C±3 W W WW 00Y.CTO C W . W W W Y OS W T . 1 0 M.TmV . .T 1 0 (Note 6) W VRS+ = 12V . =M -40°C to +85°C ±5 TAO O 1 W M . W C . O W W W WW .100Y WW .100Y.VCSENSEM=.T WW .100Y.C M.TW M.T +6.25mV O W O 400 W C O W = 12V,00Yto.C +100mV .TW WW .100Y. WW .TW OUT SettlingW Time to 1% of0Y.C VRS+ M .TWVCC = +12V,W 1 0 M . ns O 1 W M . O O Final Value CLOAD = 5pF WW W .C = +100mV VY SENSE WW800 .100Y.C M.TW W .TW 00to WW .100Y.C M.TW 1 M . O W +6.25mV WW 00Y.CO .TW WW .100Y.C M.TW WW 00Y.CO .TW W W OUT Output Resistance .1 ROUT M 12 W OkΩ W.1 Y.COM W O W W W Y.C W C . 0 W W W 0 0 Y W T . MAX4173T, V = 80mV, V ≥ +2V 60 84 W SENSE M.T .1 .T 10RS+ 00 M . O 1 W M . O W C O W W .C Y. W VRS+ Power-Supply Rejection 91W W Y.C MAX4173F, 100 dBOM.T 00Y≥ +2V M.TW 60 WW .100PSR . .TW VSENSEW= 32mV, 1 . W M O W O MAX4173H, VSENSE = 16mV, W ≥ +2V 60 95 .C WW .100Y.C M.TW WW V.RS+ .TW 00Y WW .100Y.C M.TW 1 M O W Power-Up Time to 1% of W W Yµs.C W=W5pF 00Y.CO .TW COVSENSET=W+100mV, CLOAD . 10 WW 0 W 0 Y W 1 0 W M.T Final Value . . 1 0 M . O 1 W M . O W C . O W W W Y W 7) 00Y.C Saturation Recovery Time = +12V, 10 W .TW WW .100Y.CVCC M .100µs OM.T .TW VRS+ = 12VW(NoteW 1 M . W O C . O W W Y.C W All temperature Y.C at TA .=T+25°C. WW limits Note 1: All devices are 100% production .TWby design. W W.100Y OM.TW WW 100are guaranteed 00tested M . 1 M . O W Note 2: Guaranteed by Total Output WVoltageYError .COTest..TW WW .100Y.C M.TW WW .100Y.C M.TW WWis the .sum Note 3: Total OUT Voltage Error offset voltage errors. 00of gain and O 1 W M WW 00Y.CO .TW Note 4: +6.25mV = 1/16 of +100mV full-scaleY voltage. .CO .TW WW .100Y.C M.TW WW W 0 W 0 saturation.M M .1 O W is.1in Note 5: VSENSE such that output stage WW 00Y.CO .TW .COtests. .TW WW .100Y.C WW Y W Gain Accuracy Note 6: VOS is extrapolated from 0 Wthe M .1 W .10 reversal OM Wphase Note 7: The device does not experience when overdriven. WW 00Y.CO .TW C . WW W W Y W 0 W T . 1 0 M . O W OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WW WW .100Y.C M.TW Maxim Integrated 3 O W C . W W Y W .T 00 W.1 Y.COM W W 00 W.1 W W

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 M .10 OM W.1 .CO .TW Characteristics WW 00Y Operating WTypical WW 00Y.CO .TW WW .100Y.C M.TW .1 OM +12V, VRS+ = +12V, VSENSE = +100mV, T = +25°C, unless otherwise CCO=M WWnoted.) W.1 Y(V.C Y.C WW 00Y.COA .TW 0 W W .TW W 0 W 1 W M . .T 1 00 M . O 1 W M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW W SUPPLY CURRENT vs. SUPPLYW VOLTAGE CURRENT vs. TEMPERATURE WW 00Y.CO SUPPLY W .COSUPPLY CO W Y W .TWCURRENT vs. RS+ VOLTAGE W 0 W T . 1 0 WW .100Y.440 T . . 1.4OM 550 1 M . W M W W .CO .TW .CO .TW WW .100Y.C M.TW WW .100Y500 WW .100Y MAX4173T 1.2 O 430 M OM W W .CO .TW MAX4173TWWW 00Y.C WW 00450 C . Y W W Y W W .1 1.0 OM.T .T 1 00420 M . 1 W M . O W C O W WW .100Y. .TW 0Y.C M.TW WW .10400 WW .104100Y.C MAX4173H M .TW 0.8 O W M W W .CO .TW MAX4173F WW .CO .TW 0Y.C M.TW MAX4173T WW .1350 100.6 00Y WW .400 . 00Y M O 1 W M O W MAX4173F O W W W Y.C MAX4173H WW .100Y.C MAX4173F 0 WW 300 T . 0 WW 390.100Y.C M.TW M.T 1 M . O 0.4 W O W C . O W W WW .100Y WW 250.100Y.C M.TW WW 380 .100Y.C M.TW M.T MAX4173H O W 0.2 O W C 200 O W WW .100Y. .TW WW .100Y.C M.TW WW370 .100Y.C M.TW M O W 150 0 O O 15 20 25 30 WW-50 -35 Y W 0 000.5 W .C Y.C 1.0 1.5.TW2.0 2.5 28 40 55 70 85 W 10 W 1 00-20 -5 10M25.TW WW 0 .1050Y.C TW M . . 1 . W M O W SUPPLY TEMPERATURE (°C) .CO VRS+ (V).TW OVOLTAGE (V) W W C . Y W C W . 0 Y W W W 0 Y W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . 0 OUTPUTMERROR W ERROR OUTPUT ERROR .T vs. W 0TOTAL 0 OUTPUT W .T 0Y WW TOTAL .1FULL-SCALE .Tvs. 10TOTAL 0SUPPLY M . O 1 W SENSE VOLTAGE M . vs. SUPPLY VOLTAGE O VOLTAGE W C . O W WW .TW 00Y W6W .100Y.C M.TW 4 0.60 1 WW .100Y.C M.TW M . O W O W W CC = 28V .C W .CO .TW WW .100Y.C M.TVW 0.45WW W .TW 00Y 1 00Y 4 3 M . O 1 W M . O W O MAX4173H W 0.30 WW .100Y.C M.TW 0Y.C M.TW WWMAX4173T 0 WW .100Y.C M.TW 1 . 2 2 MAX4173T O WW 00Y.CO .TW W WW 00Y.CO .TW C 0.15 . W W W Y W 0 W .1 OM W.1MAX4173H M.T .10 OM W O W W C 0 1 0 W . Y.C W C W . 0 Y W W W 0 0 Y W T . 0 W M.T .1 .T 10 0MAX4173H M . O 1 W MAX4173F M . O W C -0.15 O W MAX4173F WW .100Y. 0 .TW WW .100Y.C M.TW WW .100Y.C M.TW -2 M O W O -0.30 W .C O W WWMAX4173T.100YMAX4173F .TW WW .100Y.C M.TW -1 WW .100Y.C M.TW -4 M O W -0.45 O W 6.25mV WW 00Y.CO .TW VSENSE = 100mVW WW .100Y.C M.TW W -6 VSENSE =W Y.C 0 W T . 1 0 M . -2 -0.60 O 1 W W. 20 Y25.CO30M W 0 5 10WW CO 30 TW 0 Y150.C 200 .TW 15 20 Y.25 50 W 100 0 5 10 W15 0 W 0 0 W . W .1 .T 00 M .10(V) OM SUPPLY VOLTAGE VSENSE W(mV) SUPPLY VOLTAGE W W.1(V) Y.COM W W Y.C WW 00Y.CO .TW 0 W W 0 W W M.T .1 .T 1 vs. M . TOTAL OUTPUTW ERROR O W M .100 POWER-SUPPLY W REJECTION O O .C Y.C WWvs. TEMPERATURE W .TW WW VOLTAGE vs. W FREQUENCY .TW GAIN ACCURACY 100 00Y 0Y.C M.TW COMMON-MODE M . 1 0 M . O 1 W . 1.2 O W 0 O 6 W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.4TW -10 O WW 00Y.CO .TW W WW 00Y.CO 0.8.TW C . W W W Y W -20 W MAX4173T .1 W.1 Y.COM W M2 .TMAX4173H .100 OM MAX4173T W O W W C . W -30 C Y W MAX4173H .T W 0.4 .TW 00 W WW .100Y. 0M.T M .100 W.1 Y.COM W -40 O W O W W C . W W Y W .T W WW .100Y.C -2 M.TW .100 -50 0M.T .100 OM W MAX4173F O W C . O W W C W Y W W -60 WW .100Y. WW .100Y.C-4 M.TW M.T .100 M.T O W -0.4 O W C . O MAX4173F W -70 W Y W WW .100Y.C M.TW -6 WW .100Y.C .100 .TW -80 W M O W -0.8 O W WW WW .100Y.C M.TW -90 WW .100Y-8.C M.TW O W O W W -100 Y.C .TW WW10M .100-10Y.0C 5M.T10W 15 20 W25 30 .100-1.2 -50 -35M -20 -5 10 25 40 55 70 85 100 1k 10k 100k 1M O W O W C . TEMPERATURE (°C) FREQUENCY (Hz) W VOLTAGE (V)WW .100Y WW .100Y.C COMMON-MODE M.T W O W WW WW .100Y.C M.TW 4 Maxim Integrated O W C . W W Y W .T 00 W.1 Y.COM W W 00 W.1 W W MAX4173 toc06

GAIN ACCURACY (%)

TOTAL OUTPUT ERROR (%)

MAX4173 toc07

MAX4173 toc08

MAX4173 toc09

TOTAL OUTPUT ERROR (%)

TOTAL OUTPUT ERROR (%)

MAX4173 toc04

MAX4173 toc05

SUPPLY CURRENT (µA)

SUPPLY CURRENT (mA)

MAX4173 toc02

MAX4173 TOC01

SUPPLY CURRENT (µA)

TOTAL OUTPUT ERROR (%)

PSR (dB)

MAX4173 toc03

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 O W M .10 OM W.1 Operating (continued) W 0Y.C M.TW WW .10Characteristics WW 00Y.CO .TW WW .100Y.C Typical T . M O 1 W M . (V = +12V, V = +12V, V = +100mV, T = +25°C, unless otherwise noted.) O W CC RS+ SENSE A C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O MAX4173T W O W O W .C OUTPUT 0Y.C MTRANSIENT WW .10LARGE-SIGNAL .TW RESPONSE WW ERROR .TW 00Y WW .100Y.C M.TW TOTAL 1 M . O W vs. TEMPERATURE O (V = 6mV to 100mV) W O W WW .100Y.CSENSE M.TW WW .100Y.C M.TW 2.0.TW WW .100Y.C M O W O W O W W Y.C WW .1C0L 0= 5pF WW .100Y.C M.TW WW .100Y.C 1.5M.TW M.T O W O 100mV W C O W .C W WW .100Y. .TW WMAX4173H .TW 00Y WW .100Y.C 1.0 M.TW M 1 IN W M . O O W O MAX4173T W (45mV/div) WW .100Y.C M.TW 6mV WW .100Y.C M.TW WW .100Y.C0.5 M.TW O W O W C . O W W C 0 W . Y 2V W W .T WW .100Y WW .100Y.C M.TW .100 M.T OM W O W C . -0.5 O W W C W Y MAX4173F WW .100Y. OUTW .TW WW .100Y.C M.TW M.T .100 M O W O (500mV/div) -1.0 W C . O W W WW .100Y Y.C WW .100Y.C M.TW WW .100-1.5 M.T .TW O W 0.120V M O W C O W WW .100Y. .TW WW .100Y.C M.TW 0Y.C M.TW WW .10-2.0 M O W O W W -35O-20 -5 10 70 W 85 W 0Y.C M.TW Y.C WW .12µs/div W 25 40 55 W 0 0 T . 0 WW .100-50Y.C T . M .1 OMTEMPERATURE (°C) WW 00Y.CO .TW W WW 00Y.CO .TW W W W WW .100Y.C MMAX4173F T .1 . MAX4173H OM W W.1 Y.COM W O W W Y.C W C LARGE-SIGNAL TRANSIENT RESPONSE LARGE-SIGNAL TRANSIENT RESPONSE.TW . 0 W W W 0 0 Y W T . W .1 .T to 100mV) 00 M .10 OM (VSENSE W = 6mV SENSE OM W = 6mV to00100mV) W.1 Y(V.C W Y.C WW 00Y.CO .TW W W W W W M.T .1 .T 1 0C0L = 5pF M . O 1 W C = 5pF M . O L W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O 100mV 100mV W W O W W W .CO .TW Y.C WW .100Y.C M.TW 0 Y W T . 0 0 WW IN IN M 10 W.1 Y.CO(45mV/div) (45mV/div) W. OM WW 00Y.CO 6mV .TW 6mV W C W . W W W 0 Y W T . 0 0 W M .1 W.1 Y.CO10V M.T .10 OM W O W W C W . W C W . 0 Y W W W 0 0 Y W T . W M.T .1 .T 10 00 M . O 1 W M . 5V O W C OUT WW .100Y. WW 00Y.CO .TW .TW WW .100Y.C (3V/div) .TW OUTW M M O 1 W M . O (2V/div) O W WW 00Y.C WW .100Y.C0.6V M.TW .TW WW .100Y.C M.TW 0.3V W 1 M . O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W 2µs/div W 2µs/div WW Y.C WW 00Y.CO .TW C . 0 W W 0 Y W W M.T .1 .T 1 00 M . O 1 W M . O W C W W Y. .CO .TW .TW WW .100Y.C M.TW MAX4173F W 100 WW MAX4173T M . 00Y O 1 W M . O W SMALL-SIGNAL TRANSIENT RESPONSE O SMALL-SIGNAL .CRESPONSE WW .100Y.C M.TW WWTRANSIENT WW .100Y.C M .TW= 95mV TO 100mV) W (VSENSE (VSENSE = 95mV 00TOY100mV) M.TW 1 . WW 00Y.CO .TW W WW 00Y.CO .TW .CO .TW W W Y W 0 W = 5pF CL = 5pF M W.1 Y.COM W M .10 W.1 Y.CCLO O W W W C W . W .T W .T WW .100Y .100 .TW 100mV 10IN0 100mV M . OM W M IN O W C . O W W C W . Y W C Y W 95mV.100 (5mV/div) W (5mV/div) 95mV .TW WW .100Y. M.T .TW 100 M . O W M O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C 2.0VM.TW O W WW 00Y.CO .TW OUT W5VW .100Y.C WW 00Y.CO .TW W W OUT .1 (50mV/div) M W W.1 Y.C1.9VOM W (100mV/div) WW 00Y.CO .TW WW W W 0 W T . 1 0 M . 4.75V O W OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W 2µs/div 2µs/div O W WW .100Y.C WW .100Y.C M.TW W O W WW WW .100Y.C M.TW Maxim Integrated 5 O W C . W W Y W .T 00 W.1 Y.COM W W 00 W.1 W W MAX4173 toc11

MAX4173 toc12

MAX4173 toc13

MAX4173 toc14

MAX4173 toc16

TOTAL OUTPUT ERROR (%)

MAX4173 toc10

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 O W M .10 OM W.1 Operating (continued) W 0Y.C M.TW WW .10Characteristics WW 00Y.CO .TW WW .100Y.C Typical T . M O 1 W M . (V = +12V, V = +12V, V = +100mV, T = +25°C, unless otherwise noted.) O W CC RS+ SENSE A C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W MAX4173H O W O W .C Y.C DELAY WW .100START-UP .TW WW RESPONSE (VCC = 0 to 4V) SMALL-SIGNAL TRANSIENT .TW 00Y WW .100Y.C M.TW M 1 M . O W O .C(VSENSE .=T100mV) (VSENSE = 95mVW to W 100mV) O W W C W . Y C W . 0 Y W W W Y W W M .10 M.T .100 O W M.T CL = 5pF .100 O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C 4V 100mV . W .COIN .TW WW .TW 00Y WW .100Y.C M.TW IN 1 WW .100Y(5mV/div) M . O 95mV O W (2V/div) W OM W WW .100Y.C M.TW WW .100Y.C M.TW 0V WW .100Y.C M.TW O W O W C . O W W C W . Y W W .T WW .100Y WW .100Y.C M.TW .100 M.T OM W O W C 2V . O W W C . .TW 00Y WW .110V OUTW .TW 1 00Y WW .100Y.C M.TW M . M O W O (1V/div) W W OUTY.CO WW .100Y.C M.TW 0V W WW .100Y.C M.TW 0 WW (200mV/div) T . 0 O W O W OM W.1 WW .100Y.C M.TW WW 9.5V.100Y.C M.TW WW .100Y.C M.TW W O W .CO .TW O W WW .15µs/div W 00Y WW .100Y.C M.TW WW .100Y.C M.T2µs/div M W O W .CO .TW O W W C . Y W C W . 0 Y W W W 0 Y W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W .T WW .100Y .100 W.1 Y.COM W M.T OM W O W W C . W C W 0 Description Y W .T W 0Pin W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W W .T W Y.C WW .100Y WW PIN .100 M.T OM W M.T .100 NAME O W C . O W W C FUNCTION W Y W W W Y.C WW .100Y. WW SO M.T .100 SOT23 M.T O W M.T .100 O W C . O W W W Y .C W W 3 00YGND WW .100Y.C M.TW TW M.T .100 .Ground 1, 2 W O 1 W M . O W C . W W W Y .CO .TW Y.C WWBypass TW capacitor.W WW 1 .100Y M.T .100 3 VCC Supply Voltage Input. a .0.1µF 10to0GND with M . O W M O W C O W .C WW .100Y. .TW Y.C Power-Side WWto the.1External .TW 00Y Sense WW8 .100RS+ M .TW Connection 4 Resistor M O W M O O W WW 00Y.C WW .100Y.C M.TW Wfor .TW 0Y.C Load-Side WW .TW Connection 1 0RS5 6 the External Sense Resistor M . 1 M . O WW 00Y.CO .TW W WW 00Y.CO .TW W W W WW .100Y.C Voltage T ( VRS+ - VRS- ). Output impedance W.1 isY.COM W M. Output. VOUT is proportional OM W.1 to VYSENSE 6 4 OUT O W W C . W C approximately 12kΩ. W . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W C – 2, 5, 7 W N.C. W Y W .T W Not internally 00 Y.No Connection. W connected. W M.T .100 W.1 Y.COM W M.T .100 O W O W W C . W W .T WW .100Y WW .100Y.C M.TW .100 M.T OM W O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W W WW .100Y. WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C WW .100Y.C M.TW WW .100Y.C M.TW W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WW WW .100Y.C M.TW 6 Maxim Integrated O W C . W W Y W .T 00 W.1 Y.COM W W 00 W.1 W W MAX4173 toc17

MAX4173 toc15

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 O SetW the output range by selecting RSENSE and Wfull-scale M .10 OM W.1 Detailed Description Y.C 0 W WW 00Y.CO .TW .TW of the MAX4173. 0 WW .100Y.C M.TW the appropriate gain version 1 M . TheOMAX4173 high-side current-sense amplifier feaW M .CO .TW W.1 WW 00Y.CO W is .C a 0 .T WW .100YApplications tures toW +28V inputWcommon-mode range.Tthat Information WW .100Y M 1 . feature OM WThis OM of supply voltage. WW 00Y.CO .TW W independent allowsW the C . W C . Y W W W Y Wa battery 00 W M .1 .ofT current out of Component Values 00monitoring M.T WRecommended Odischarge W.1 in deep .COa wide OM W W.1 and C W . Y W C The MAX4173 senses of currents with W . 0 Y W T W also enables high-side current sensing at voltages W 0Y W TW M. variety .10resistorOvalues. M.T .1).00 W M.the .10greater different sense Table 1 lists common O W C than supply voltage (V . O CC W W Y .C Wvalues .for .TW of the MAX4173. W 00typical WW .100Y.C M.TW resistor 1 operation WW .1The T M . 00YMAX4173 O W CurrentCfrom M operates as follows: O the W W WW CO through WW .100Y.C M.TChoosing W RSENSE toWthe 0Y. 1). Since Y.flows TW load.1(Figure . 0 0 WW source T . RSENSE 0 M O 1 W M . O W C . more.Taccurately, O Wlower currents Wthe internal-sense C highTW To measure amplifier’s inverting inputY.has W Y W C use a high . 0 W W W 0 0 Y W 0 W M. .1through impedance, negligible current flows RG2 OM W.1. TheYhigh M.T .100 value for R value develops a higher O W C SENSE . O W W C W . Y W that .1reduces .T the .TWsense voltage W bias current). 00 Y.C the input WW Therefore, offset WW (neglecting M .100 equals OM voltage errors of the W M.T inverting-inputWvoltage .100amplifier’s O W C . sense O W W C W Y internal op amp. .C W W ). The W 0Y. .TW WWVSOURCE M.T .100 .TSENSE 10open-loop 00Y- (ILOADM)(R amplifier’s M . O 1 W . O W C . O In applications monitoring very high RSENSE WforcesYits.Cnoninverting W W WW .100Y 2 M.Tcurrents, gain theW same voltage W input to W 0Y.C as M.Tmust 0 0 WW T . 1 0 be able to dissipate the I R losses. If the resistor’s . O W M .1 W the W inverting the drop across RG1 .CO .rated Y.C CO Therefore, W power dissipation .input. Y WW .1is00exceeded, TW W (ILOAD value may drift .its W 0 Y)(R WW through T 0 0 Wequals T ). Since I flows RG1, M . SENSE RG1 1 0 M . O 1 W M . O W or it may fail altogether, causing a differential C . O W W C W voltage . Y The internal IRG1 SENSE) / RG1. W .Tabsolute 0Y Y.C WWcurrent .TW the terminals 100 ofOthe 0mirror 0)(R WW= (ILOAD across in .excess maxiM .TW gain factor, 1 0I RG1 M . 1 W M . multiplies by a current β, to give O mum ratings. W .C O W W C W . Y W C W . 0 Y W T W W = β · (ILOAD 0 W )(RSENSE IRGD W = β ·.1IRG1 M. 00Y. Solving .100 ) / OM.T W.1 Y.COcomponent, M.ITRGDimpedance, W O W W If I has a large high-frequency C RG1. Assuming infinite output V = (I ) SENSE W mini. W OUT RGD C W . Y W W .Tthe inductance WWSubstituting M.T resistors .100 . Wire-wound .TWand rearranging, 100= 00Y in forMIRGD mize of R M . (RGD). V SENSE O 1 W OUT . O W C W W equals .CO · ILOAD 0Y. Y.C have .the WW .10metal-film .TW are β · (RGD TWhighest inductance, SENSE WW/ RG1)(R Mresistors .TW). The partsWgain W 100 00Y M . O 1 W M . O resisβ · RGDW / RG1. ) W W Therefore, OUT = (GAIN) (R .Csomewhat Y.C metal-film Wbetter, andWlow-inductance .CO V.T .TW W WW=SENSE .Tbest 100 00Y tors are M . suited for these applications. 1 00Y= 20 for (ILOADW ), where .GAIN MAX4173T, GAIN 50 for M . O 1 W M O W O W WW .100Y.C M.TW MAX4173F, W Y=.C100 for .MAX4173H. WW .100Y.C M.TW Using 0 WWand GAIN T 0 a PCB O RSENSE 1 W Trace O Cas OM Wissue W. W .C Y.accuracy WW 00Y C W . 0 W W If the cost of R is an and W 0 Y SENSE W T . 1 0 W M.Tis not . .T 1 critical, 0 M . O 1 W M . O W C use the alternative solution shown in Figure 2. . O ILOAD W W W 0Y to M Y.Csolution.Tuses WPC WW 00Y.CRSENSE .TW a WTO LOAD BATTERY 0 0 W 1 0 W T . . This copper board traces create 1 M . VSOURCE O M .1 O WaW0.1-inch-wide WW 0sense W The resistivity of 0Y.C trace Y.Cresistor. Wof WW 00Y.CO .TW .TW 0 0 W T . 1 W M . 1 0 TO +28V M . O 1 W M . O 2-ounce copper is approximately 30mΩ/ft. The resisW C . O RS+ RSW W C . Y W of copper .TW WW .tance-temperature .TW coefficient 100 is fairly 00Y WW IRG1.100Y.C M.TW high M . 1 M O W O W Y.C so systems aW WW that WWRG1 00Y.CORG2 .TW +3V TO +28V .T 00experience 0Y.C M.0.4%/°C), WW (approximately TW 1 0 W M . 1 VCC . O 1 W wide temperature variance must compensate for this M . O W C . O W Y power.TW W not exceed Y.C WW WW effect. the maximum .Tdo WW .100Y.C M.TW M .100 100 In addition, M . W O W .CO .TW O W trace. WW .Cof the copper Y W dissipation C W . 0 Y W W 0 0 Y W T . W .1 .T 10 00 OM OMMAX4173T (with a maximum W.example, For the .CcurWW 00load W.1A1 Y.COM W C . Y W W Y W W .TW 0 and an W rent of.1010A .TSENSE of 5mΩ) creates 1a full-scale W M . R .T 00 M O 1 W M . W O W W .CO that.Tyields 50mV of.C1V. W a maximum WW VOUT 00Y WVWSENSE.10of0Y 1 WW .100Y.C M.TW M.T . M O W R in this case requires about 2 inches of 0.1 inchO SENSE W C . O W W W Y W W .C Y.C W W wide copper WW MAX4173 M.T .100 .TW 100 trace.OM.T 00Y . O 1 W M . W C O W W Y. WW WW .100Y.C M.TW Output WW .1OUT00Y.CVOUT M.TW M.T .100 CURRENT Impedance O W O W O W MIRROR .C W The of the Wa current source 0Ya.C M.TW WW driving Woutput .Tis 10OUT 00Y MAX4173 WWIRGD .100Y.C M.TW . 1 M . W 12kΩ resistance. Resistive loading added to W .CO .TW O W W .CO .TW WTo 00Y WW the .1output reduces of the MAX4173. minimize 1 00Y gainM WW .100Y.C M.TW . W to a Y.COM Oapplications, connectW RGD = 12k W for most O W C . output errors OUT W C W . Y W W W .TWhen output buffering W .10is0 .TW 100input stage. 00Y M . 1 high-impedance W GND M . O W O W Y.C WW WWchoose with a common-mode .TW WW .100Y.C M.TW required, 100an opOamp M . W O W input range Wand an00output Wswing that includes Y.C voltage WW .100Y.C M.TW ground W 1 when W operating with a.Tsingle supply. The op M . O Figure 1. Functional Diagram O W WW .100Y.C WW .100Y.C M.TW W O W WW WW .100Y.C M.TW Maxim Integrated 7 O W C . W W Y W .T 00 W.1 Y.COM W W 00 W.1 W W

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 M .1 M .10 WW 00Y.CO .TW Recommended .CO .TValues WW Component CO 1. W Y W WW 00Y.Table W 0 W 0 M .1 .T W.1 Y.COM W WW 00Y.COFULL-SCALE W.1 Y.COM W W OUTPUT VOLTAGE W W W 0 W T RESISTOR . W M.T .1 .T LOAD CURRENTW.10 CURRENT-SENSE 00 FULL-SCALE M GAIN (FULL-SCALE VSENSE = 100mV) O 1 W M . O O Ω) ILOAD (A) R (mΩ W W WW .100Y.C M.TW VOUT (V) WW .100Y.C SENSE T . WW .100Y.C M.TW O W OM W O W WW 20 .100Y.C M.TW 2.0 WW .100Y.C M.TW WW .100Y.C M.TW O W 0.1 5.0 O W50 W Y.C WW 00Y.CO1000.TW C . 0 W W .TW10.0 W 0 Y W 1 0 W T M . . 1 0 100 M . W O W .CO .TW OM W.1 WW 00Y WW .100Y.C M.TW 20 2.0 1 WW .100Y.C M.TW . OM W O W C . O W W C W . Y W Y 100 .TW W50 .T5.0 00 W WW .100Y.C M1.TW M .100 W.1 Y.COM 10.0 O W 100 O W W C . W .TW WW .100Y .TW 100 WW .100Y.C M.TW M . M 20 2.0 O W W O W CO W WW .100Y.C M5.0 .TW WW .100Y.20 T . 50 WW .100Y.C 5M.TW M O W O W C . O W W W Y 100W 10.0 WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W 20 WW 2.0 TW Y. WW .100Y.C M.TW 100 WW .100Y.C10 M.TW M. . O W 10 50 5.0 O W C . O W W C . .TW WW .100Y .TW 100 W W.100Y 10.0 WW .100Y.C M.TW M M O O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 M .1 WW 00Y.CO .TW W.1 Y.COM W WW 00Y.CO .TW W W W WINPUT .100 M .1 LOAD/BATTERY M.T RSENSE W.1 Y.COM W O WW 00Y.CO ILOAD W W C . W W .TW W V 0 W T 1 SENSE 0 M . VIN M.LOW-COST .T _ 0.3W in. COPPER 100Y 0.1 in. COPPER 0.3 in. COPPER 1 0 TO +28V . O W M . O SWITCHING W O W + WW .100Y.C M.TW WW .100Y.C MREGULATOR .TW WW .100Y.CVSENSE M.TW R O WW SENSE00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W 0 W RS+ W.1 RS.1 +3V TO +28V OM M.T .10RS+ OM W RSO W W C W . Y.C W C +3V TO +28V W . 0 Y W W V W CC 0 0 Y W T . W M.T .1 .T VCC 10 00 M . O 1 W M . O W C 0.1µF O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW0.1µF M O W O W W W Y.C .CO WMAX4173 .TW WW .100Y.C M.TW 100 WW .1MAX4173T M . 00Y OUT M.TW O W O W O W WW .100Y.CLOAD/ M.TW WW .100Y.C M.TW WW .100Y.C M.TW OUT .CO .TW O WW 00YBATTERY W WW 00Y.CO .TW C . W W W Y W GND W M .1 .T M .1 100 OM WW 00Y.CO .TW W.GND WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W 0 W Figure 3..10Current Figure 2. MAX4173 Connections Showing Use of PC Board Source.T W W.1 Y.COM W M.T .100 OM W O W W C . W C W . Y W .T W .T WW .100Y .100 .TW 100 M . OM W M O W C . O W amp’s supply voltage range should be at least as high W C Current Source Circuit W . Y W C W . Y W W .Tdiagram WW M.T .100 .TW 100 a block 00Y as any voltage the system may encounter. M . Figure 3 shows using the MAX4173 O 1 W M . O W O W .C Y.C WWsource. .TW with a switching make a current Y.C loading WW TW .to 100 00Yregulator The percent error introduced WW by M . .TW is 1 00output M . O 1 W M . O W O W determined with the followingW formula: WW .100Y.C M.TW W Y.C WW .100Y.C M.TW 0 W T . 0 O 1 W M W. ⎛ WW 00Y.CO .TW .CO⎞ .TW R WW .100Y.C WLOAD Y W 0 W %ERROR = 100 ⎜ M .1 W .10 − 1⎟ M WW 00Y.CO .TW ΩW +W RLOAD Y.C⎠O ⎝ 12kW WW W W 0 T . 1 0 M . O W W.1 Y.COM W WW .100Y.C M.TW 0 WW T where RLOAD is the external load applied to OUT. . 0 O W OM W.1 WW .100Y.C WW .100Y.C M.TW W O W WW WW .100Y.C M.TW 8 Maxim Integrated O W C . W W Y W .T 00 W.1 Y.COM W W 00 W.1 W W

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 O W M .10 OM W.1 Pin Configurations WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW O W M O W W.1 CO WW .100Y.C M.TW W WW .100Y.C M.TW WW .100Y.TOP T . O VIEW W O W OM W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W + O O W + .C W WW 600OUT W Y.C WW .100Y T . WW .100Y.C M.TW GND 1 W M.T 8 RS+ VCC 1 M .1 O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T7 N.C. .2100 N.C. O MAX4173 W O W C O W W Y. GND 2 WW .100MAX4173 WW 5 .1RS-00Y.C M.TW WW .100Y.C M.TW M.6T RS3 GND W O O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TVW 3 M O W OUT 4 5 N.C. RS+ 4 O W CC O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW 00Y.CO .TW 0Y.C M.TW WW .1SO 0 WW .100Y.C M.TW SOT23 W M .1 O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 M .1 WW 00Y.CO .TW W.1 Y.COM W WW 00Y.CO .TW W W W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W .T 00 W.1 Y.COM W Package Information W.1 Y.COM W W W.1 Y.COM W W W W land patterns .T 0 Wthe latest M.T .100 .TW For outline information and 100 0package M . O 1 W M . O W C . O W W .C (footprints), WW .100Y Y.C WWNote .that .TW 00aY 0www.maxim-ic.com/packages. WW “-”go.1into M.T .TWindicates RoHS 1only. 0the M O W M “+”, “#”, or W package code status O W C O W .C W WW .100Y. W Y.Cshow a.Tdifferent Package suffix W character, 1but .TW 00Y WWdrawings M.T 00may M . O 1 W M . O W the drawing pertains to the O package regardless of RoHS status. W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW PACKAGE W PACKAGE LAND WW 00Y.CO .TW WW 00Y.CO .TW .CO OUTLINE W W W Y W 0 W T M .1 . NO. TYPE PATTERN NO..1 0CODE OM W WW 00Y.CO .TW W.1 Y.COM W C . W W Y W W W 21-0041 90-0096 8 SOW S8+4 .T 00 W.1 Y.COM W M.T .100 W.1 Y.COM W W W 90-0175 6 SOT23 WW U6+2Y.CO 21-0058 W .T W 00 W W M.T .100 W.1 Y.COM W M.T .100 O W O W W C . W W Y W .T 00 W WW .100Y.C M.TW M.T .100 W.1 Y.COM W O W O W W C . W W .T WW .100Y WW .100Y.C M.TW .100 M.T OM W O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W .1 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W W Y W .T W WW .100Y.C M.TW .100 M.T .100 OM W O W C . O W W C W Y W W WW .100Y. WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WW WW .100Y.C M.TW Maxim Integrated 9 O W C . W W Y W .T 00 W.1 Y.COM W W 00 W.1 W W

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier

W M.T O W Y.C M.T .100 O W WW .100Y.C M.TW O W W WW .100Y.C M.TW T . M WW 00Y.CO .TW .CO .TW Y W 0 0 OM W.1 OM W.1 WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW W WW .100Y.C M.TW T . O W M WW 00Y.CO .TW .CO .TW WW .100Y.C M.TW Y W 0 O W M .10 OM W.1 WW .100Y.C M.TWRevision History WW 00Y.CO .TW WW .100Y.C M.TW O W M W.1 WW 00Y.CO .TW CO WW .100Y.C M.TW W REVISION W PAGES WW .100Y.REVISION T . 1 DESCRIPTION W OM W. .CO .TW OM W W C NUMBER DATE CHANGED . Y W C W . 0 Y W W W 0 W 00 W M .T 00Y M.T W.1 Y.COlead-free O W.to1 2V isYnot W.1 Y.C4OM W Clarified 0V a high-accuracy range W for W the device,0added C W . W W W 6/10 1, 2 W W M.T .10 options andW soldering M.T .100 temperature O W M.T .100 O C . O W W C W . Y W C W . 0 Y W T . W 0 W VRS+ .conditions .T WW .100Y5 Updated to synchronize with tested material 2, 3 100 W.1 Y.COM W M.T4/11 OM W O W W C . W C W . 0 Y W T W . W 0 0 Y W T W M .1 .T 00 M. .10 WW 00Y.CO .TW W.1 Y.COM W WW 00Y.CO .TW W W W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W .T WW .100Y .100 W.1 Y.COM W M.T OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W W .T WW .100Y WW .100Y.C M.TW .100 M.T OM W O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W C O W W WW .100Y. WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W 0 W .1 W.1 Y.COM W M.T .10 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W W Y W .T 00 W WW .100Y.C M.TW M.T .100 W.1 Y.COM W O W O W W C . W W .T WW .100Y WW .100Y.C M.TW .100 M.T OM W O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W .1 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W W Y W .T W WW .100Y.C M.TW .100 M.T .100 OM W O W C . O W W C W Y W W WW .100Y. WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W W .CO .TW WW .100Y.C M.TW WW .100Yother Maxim cannot assume responsibility for use of any circuitry than circuitry entirely embodied inW a Maxim product. M ONo circuit patent licenses are implied. Wspecifications W .CO Y.C Wand Maxim reserves the right to change the circuitry without notice at any time. The parametric values (min and max limits) shown in the Electrical W 0 Y W 0 0 W T . 0 .1 Characteristics table are guaranteed. Other parametric.1 inM this data sheet are provided forW W values quoted W guidance. CO . W W Y W 0 W T . Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 10 Maxim.1 Integrated 160 0 OM W The Maxim C . W ©  Maxim Integrated W Integrated are trademarks of Maxim Integrated Products, Inc. logo and Maxim Y W M.T .100 O W C WW .100Y. W WW

MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier