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MAX4173FEUTMAXIMN/a5avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173FEUT+ |MAX4173FEUTMAXIMN/a200avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173FEUT+T |MAX4173FEUTTMAXIMN/a9760avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173HESA+ |MAX4173HESAMAXIMN/a72avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173HESA+T |MAX4173HESATMAXIM N/a5000avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173HEUTMAXIMN/a20avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173HEUT+TMAIXMN/a2500avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173TESA+ |MAX4173TESAMAXIMN/a37avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173TESA+T |MAX4173TESATMAXIMN/a2500avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173TEUT+T |MAX4173TEUTTMAXIMN/a8757avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173TEUT+T |MAX4173TEUTTMAXN/a6avaiLow-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier


MAX4173FEUT+T ,Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense AmplifierELECTRICAL CHARACTERISTICS(V = 0 to +28V, V = +3V to +28V, V = 0V, T = T to T , R = ∞ unless otherw ..
MAX4173FEUT-T ,Low-Cost / SOT23 / Voltage-Output / High-Side Current-Sense AmplifierMAX4173T/F/H19-1434; Rev 1; 5/99Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173HESA ,Low-Cost / SOT23 / Voltage-Output / High-Side Current-Sense AmplifierFeaturesThe MAX4173 low-cost, precision, high-side current-' Low-Cost, Compact Current-Sense Soluti ..
MAX4173HESA+ ,Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense AmplifierFeaturesThe MAX4173 low-cost, precision, high-side current-♦ Low-Cost, Compact Current-Sense Soluti ..
MAX4173HESA+T ,Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifierfeatures a voltage output that eliminates the need forRange, Functional Down to 0V, Independent ofg ..
MAX4173HEUT ,Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense AmplifierMAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
MAX803SQ308T1G , Very Low Supply Current 3-Pin Microprocessor Reset Monitor
MAX803TEXR+ ,3-Pin Microprocessor Reset CircuitsMAX803/MAX809/ 3-Pin Microprocessor Reset CircuitsMAX810
MAX803TEXR+T ,3-Pin Microprocessor Reset CircuitsElectrical Characteristics(V = full range, T = -40°C to +105°C (SOT23) or T = -40°C to +125°C (SC70 ..
MAX803TEXR-T ,3-Pin Microprocessor Reset CircuitsFeaturesThe MAX803/MAX809/MAX810 are microprocessor (µP) Precision Monitoring of +2.5V, +3V, +3.3V ..
MAX803ZEXR+ ,3-Pin Microprocessor Reset CircuitsMAX803/MAX809/ 3-Pin Microprocessor Reset CircuitsMAX810
MAX804RCPA ,3.0V or 3.3V microprocessor supervisory circuit. Reset threshold 2.625V. Active-high reset. Watchdog input. Backup-battery switch. Power-fail threshold accuracy +-2%. Power-fail comparator. Reset window +-2%ELECTRICAL CHARACTERISTICS(V = 3.17V to 5.5V for the MAX690T/MAX704T/MAX80_T, V = 3.02V to 5.5V for ..


MAX4173FEUT-MAX4173FEUT+-MAX4173FEUT+T-MAX4173HESA+-MAX4173HESA+T-MAX4173HEUT-MAX4173HEUT+T-MAX4173TESA+-MAX4173TESA+T-MAX4173TEUT+T
Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
AVAILABLE
General Description

The MAX4173 low-cost, precision, high-side current-
sense amplifier is available in a tiny SOT23-6 package.
It features a voltage output that eliminates the need for
gain-setting resistors and it is ideal for today’s notebook
computers, cell phones, and other systems where cur-
rent monitoring is critical. High-side current monitoring
is especially useful in battery-powered systems, since it
does not interfere with the ground path of the battery
charger. The input common-mode range of 0 to +28V is
independent of the supply voltage and ensures that the
current-sense feedback remains viable even when con-
nected to a battery in deep discharge. The MAX4173’s
wide 1.7MHz bandwidth makes it suitable for use inside
battery charger control loops.
The combination of three gain versions and a user-
selectable external sense resistor sets the full-scale
current reading. This feature offers a high level of inte-
gration, resulting in a simple and compact current-
sense solution.
The MAX4173 operates from a single +3V to +28V sup-
ply, typically draws only 420µA of supply current over
the extended operating temperature range (-40°C to
+85°C), and is offered in the space-saving SOT23
package.
Applications

Notebook Computers
Portable/Battery-Powered Systems
Smart Battery Packs/Chargers
Cell Phones
Power-Management Systems
General System/Board-Level Current Monitoring
PA Bias Control
Precision Current Sources
Features
Low-Cost, Compact Current-Sense Solution High Accuracy +2V to +28V Common-Mode
Range, Functional Down to 0V, Independent of
Supply Voltage
Three Gain Versions Available
+20V/V (MAX4173T)
+50V/V (MAX4173F)
+100V/V (MAX4173H)
±0.5% Full-Scale Accuracy±3mV Input Offset Voltage (MAX4173T)Wide 1.7MHz Bandwidth (MAX4173T)420µA Supply CurrentAvailable in Space-Saving SOT23 Package
Low-Cost, SOT23, Voltage-Output,
High-Side Current-Sense Amplifier

MAX4173T/F/H
RSENSE
0 TO +28V
ILOADVSENSE
VCC
OUT
GND
RS++3V TO +28VRS-
LOAD/
BATTERY
A/D
CONVERTER
0.1μF
Typical Operating Circuit
PART

MAX4173TEUT+T
MAX4173TESA+
PIN-PACKAGE

6 SOT23
8 SO
Ordering Information

-40°C to +85°C
-40°C to +85°C
TEMP RANGESOT TOP MARK

AABN
MAX4173FEUT+T-40°C to +85°C6 SOT23AABO
MAX4173FESA+-40°C to +85°C8 SO—
MAX4173HEUT+T-40°C to +85°C6 SOT23AABP
MAX4173HESA+-40°C to +85°C8 SO—
GAIN (V/V)

+Denotes a lead(Pb)-free/RoHS-compliant package.= Tape and reel.
MAX4173
Low-Cost, SOT23, Voltage-Output,
High-Side Current-Sense Amplifier
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VRS+ = 0 to +28V, VCC = +3V to +28V, VSENSE= 0V, TA = TMINto TMAX, RLOAD = ∞unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
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
absolute maximum rating conditions for extended periods may affect device reliability.
VCC, RS+, RS- to GND..........................................-0.3V to +30V
OUT to GND.............................................. -0.3V to (VCC+ 0.3V)
Output Short-Circuit to VCCor GND......................... Continuous
Differential Input Voltage (VRS+- VRS-).............................±0.3V
Current into Any Pin.........................................................±20mA
Continuous Power Dissipation (TA= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
SOT23-6 (derate 8.7mW/°C above +70°C).................696mW
Operating Temperature Range..........................-40°C to +85°C
Storage Temperature Range............................-65°C to +150°C
Lead Temperature (soldering, 10s)................................+300°C
Soldering Temperature (reflow)......................................+260°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

Operating Voltage RangeVCCGuaranteed by PSR test328V
Common-Mode Input RangeVCMR(Note 2)028V
Common-Mode RejectionCMRVRS+ > +2.0V90dB
Supply CurrentICCVRS+ > +2.0V, VCC > 12V0.421.0mA
Leakage CurrentIRS+, IRS-VCC = 0V, VRS+ = 28V0.33µA
VRS+ > +2.0V050IRS+VRS+ ≤ +2.0V-35050
VRS+ > +2.0V0100Input Bias Current
IRS-VRS+ ≤ +2.0V-700100
Full-Scale Sense VoltageVSENSEVSENSE = VRS+ - VRS-150mV
VSENSE = +100mV, VCC = +12V, VRS+ = +12V±0.55.75
VSENSE = +100mV, VCC = +12V, VRS+ = +12V,
TA = +25°C0.53.25
VSENSE = +100mV, VCC = +28V, VRS+ = +28V0.55.75
VSENSE = +100mV, VCC = +12V, VRS+ = +0.1V-9±24
Total OUT Voltage Error
(Note 3)
VCC = +12V, VRS+ = +12V, VSENSE = +6.25mV
(Note 4)±7.5
MAX4173T, VCC = +3.0V, VRS+ = 28V,
VSENSE = 250mV0.81.2
MAX4173F, VCC = +7.5V, VRS+ = 28V,
VSENSE = 250mV0.81.2Out High Voltage (Note 5)(VCC - VOH)
MAX4173H, VCC = +15V, VRS+ = 28V,
VSENSE = 250mV0.81.2
TA = +25°C1.25
OUT Low VoltageVOL
MAX4173TEUT,
VCC = +5V, VRS+ = 0.89V,
VSENSE = 0mVTA = -40°C to +85°C40
MAX4173
Low-Cost, SOT23, Voltage-Output,
High-Side Current-Sense Amplifier
Note 1:
All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design.
Note 2:
Guaranteed by Total Output Voltage Error Test.
Note 3:
Total OUT Voltage Error is the sum of gain and offset voltage errors.
Note 4:
+6.25mV = 1/16 of +100mV full-scale voltage.
Note 5:
VSENSEsuch that output stage is in saturation.
Note 6:
VOSis extrapolated from the Gain Accuracy tests.
Note 7:
The device does not experience phase reversal when overdriven.
ELECTRICAL CHARACTERISTICS (continued)

(VRS+ = 0 to +28V, VCC = +3V to +28V, VSENSE= 0V, TA = TMINto TMAX, RLOAD = ∞unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

MAX4173T,
VSENSE = +100mV1.7
MAX4173F,
VSENSE = +100mV1.4
MAX4173H,
VSENSE = +100mV1.2
BandwidthBW
VRS+ = +12V,
VCC = +12V,
CLOAD = 5pF
VSENSE = +6.25mV
(Note 4)0.6
MHz
MAX4173T20
MAX4173F50GainAV
MAX4173H100
V/V
TA = +25°C0.5±2.5
ΔAV
MAX4173T/F VSENSE =
+10mV to +150mV,
VCC = VRS+ = 12VTA = -40°C to +85°C4.0
TA = +25°C0.5±2.5
Gain Accuracy
ΔAV
MAX4173H VSENSE =
+10mV to +100mV,
VCC = VRS+ = 12VTA = -40°C to +85°C4.0
TA = +25°C0.3±3Input Offset Voltage
(Note 6)VOSMAX4173TEUT,
VRS+ = 12VTA = -40°C to +85°C±5mV
VSENSE = +6.25mV
to +100mV400
OUT Settling Time to 1% of
Final Value
VCC = +12V, VRS+ = 12V,
CLOAD = 5pFVSENSE = +100mV
to +6.25mV800
OUT Output ResistanceROUT12kΩ
MAX4173T, VSENSE = 80mV, VRS+ ≥ +2V6084
MAX4173F, VSENSE = 32mV, VRS+ ≥ +2V6091Power-Supply RejectionPSR
MAX4173H, VSENSE = 16mV, VRS+ ≥ +2V6095
Power-Up Time to 1% of
Final ValueVSENSE = +100mV, CLOAD = 5pF10µs
Saturation Recovery TimeVCC = +12V, VRS+ = 12V (Note 7)10µs
MAX4173
Low-Cost, SOT23, Voltage-Output,
High-Side Current-Sense Amplifier

SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4173 TOC01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
MAX4173T
MAX4173F
MAX4173H
SUPPLY CURRENT vs. TEMPERATURE
MAX4173 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (
A)
MAX4173T
MAX4173F
MAX4173H
SUPPLY CURRENT vs. RS+ VOLTAGE
VRS+ (V)
SUPPLY CURRENT (mA)
MAX4173T
MAX4173H
MAX4173F
TOTAL OUTPUT ERROR vs.
SUPPLY VOLTAGE
MAX4173 toc04
SUPPLY VOLTAGE (V)
TOTAL OUTPUT ERROR (%)
MAX4173F
VSENSE = 100mV
MAX4173T
MAX4173H
1001k10k100k1M10M
POWER-SUPPLY REJECTION
vs. FREQUENCY

MAX4173 toc07
PSR (dB)-60
TOTAL OUTPUT ERROR
vs. SUPPLY VOLTAGE
MAX4173 toc05
SUPPLY VOLTAGE (V)
TOTAL OUTPUT ERROR (%)
MAX4173F
VSENSE = 6.25mV
MAX4173H
MAX4173T10050150200
TOTAL OUTPUT ERROR vs.
FULL-SCALE SENSE VOLTAGE

MAX4173 toc06
VSENSE (mV)
TOTAL OUTPUT ERROR (%)
MAX4173F
VCC = 28V
MAX4173H
MAX4173T
TOTAL OUTPUT ERROR vs.
COMMON-MODE VOLTAGE
MAX4173 toc08
TOTAL OUTPUT ERROR (%)
MAX4173F
MAX4173TMAX4173H
Typical Operating Characteristics

(VCC= +12V, VRS+= +12V, VSENSE= +100mV, TA= +25°C, unless otherwise noted.)
GAIN ACCURACY vs. TEMPERATURE
MAX4173 toc09
GAIN ACCURACY (%)MAX4173F
MAX4173H
MAX4173T
MAX4173
Low-Cost, SOT23, Voltage-Output,
High-Side Current-Sense Amplifier
Typical Operating Characteristics (continued)

(VCC= +12V, VRS+= +12V, VSENSE= +100mV, TA= +25°C, unless otherwise noted.)
TOTAL OUTPUT ERROR
vs. TEMPERATURE
MAX4173 toc10
TEMPERATURE (°C)
TOTAL OUTPUT ERROR (%)
MAX4173HMAX4173T
MAX4173F
2μs/div
MAX4173T
LARGE-SIGNAL TRANSIENT RESPONSE
(VSENSE = 6mV to 100mV)

(45mV/div)
OUT
(500mV/div)
6mV
100mV
0.120V
MAX4173 toc11
CL = 5pF
2μs/div
MAX4173F
LARGE-SIGNAL TRANSIENT RESPONSE
(VSENSE = 6mV to 100mV)

(45mV/div)
OUT
(2V/div)
6mV
100mV
0.3V
MAX4173 toc12
CL = 5pF
2μs/div
MAX4173H
LARGE-SIGNAL TRANSIENT RESPONSE
(VSENSE = 6mV to 100mV)

(45mV/div)
OUT
(3V/div)
6mV
100mV
10V
0.6V
MAX4173 toc13
CL = 5pF
MAX4173T
SMALL-SIGNAL TRANSIENT RESPONSE
(VSENSE = 95mV TO 100mV)

(5mV/div)
OUT
(50mV/div)
95mV
100mV
2.0V
1.9V
MAX4173 toc14
CL = 5pF
MAX4173F
SMALL-SIGNAL TRANSIENT RESPONSE
(VSENSE = 95mV TO 100mV)

(5mV/div)
OUT
(100mV/div)
95mV
100mV
4.75V
MAX4173 toc16
CL = 5pF
MAX4173
Low-Cost, SOT23, Voltage-Output,
High-Side Current-Sense Amplifier
Pin Description
Typical Operating Characteristics (continued)

(VCC= +12V, VRS+= +12V, VSENSE= +100mV, TA= +25°C, unless otherwise noted.)
2μs/div
MAX4173H
SMALL-SIGNAL TRANSIENT RESPONSE
(VSENSE = 95mV to 100mV)

(5mV/div)
OUT
(200mV/div)
95mV
100mV
10V
9.5V
MAX4173 toc15
CL = 5pF
5μs/div
START-UP DELAY (VCC = 0 to 4V)
(VSENSE = 100mV)

(2V/div)
OUT
(1V/div)
MAX4173 toc17Load-Side Connection for the External Sense ResistorRS-5
FUNCTIONNAME
PIN
SOT23
Supply Voltage Input. Bypass to GND with a 0.1µF capacitor.VCC3Voltage Output. VOUTis proportional to VSENSE( VRS+- VRS-). Output impedance is
approximately 12kΩ.OUT6GroundGND1, 2Power-Side Connection to the External Sense ResistorRS+4
2, 5, 7No Connection. Not internally connected.N.C.–
MAX4173
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