MAX4374TEUB+ ,Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICsFeaturesThe MAX4373/MAX4374/MAX4375 low-cost, micropow-• Integrated Current-Sensing Solution Simpli ..
MAX4374TEUB+T ,Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICsApplications Ordering Information continued at end of data sheet.Notebook ComputersTypical Operatin ..
MAX4375FESD ,Low-Cost / Micropower / High-Side Current-Sense Amplifier Comparator Reference ICsApplicationsILOADNotebook Computers+ V -SENSE V = 0 TO 28VINPortable/Battery-Powered SystemsRSENS ..
MAX4375FEUB ,Low-Cost / Micropower / High-Side Current-Sense Amplifier Comparator Reference ICsMAX4373/MAX4374/MAX437519-1630; Rev 0; 3/00Low-Cost, Micropower, High-Side Current-SenseAmplifier + ..
MAX4375FEUB ,Low-Cost / Micropower / High-Side Current-Sense Amplifier Comparator Reference ICsFeaturesThe MAX4373/MAX4374/MAX4375 low-cost, micropow- Current-Sense Amplifier plus Internal Comp ..
MAX4375FEUB+ ,Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICsEVALUATION KIT AVAILABLELow-Cost, Micropower, High-SideMAX4373/MAX4374/MAX4375Current-Sense Amplifi ..
MAX8211CPA ,Microprocessor Voltage Monitors with Programmable Voltage Detectionapplications where theMAX8211CPA 0°C to +70°C 8 Plastic DIPmaximum supply voltage is less than 16.5 ..
MAX8211CPA ,Microprocessor Voltage Monitors with Programmable Voltage Detectionblock diagrams of Figures 1 and 2, theMAX8211 and MAX8212 each contain a 1.15V refer-ence, a compar ..
MAX8211CPA ,Microprocessor Voltage Monitors with Programmable Voltage Detectionblock diagrams of Figures 1 and 2, theMAX8211 and MAX8212 each contain a 1.15V refer-ence, a compar ..
MAX8211CPA+ ,Microprocessor Voltage Monitors with Programmable Voltage DetectionFeaturesMaxim’s MAX8211 and MAX8212 are CMOS micropower µP Power-Fail Warningvoltage detectors th ..
MAX8211CSA ,Microprocessor Voltage Monitors with Programmable Voltage DetectionApplicationsMAX8211EJA -40°C to +85°C 8 CERDIPµP Voltage MonitoringMAX8211ETY -40°C to +85°C 8 TO-9 ..
MAX8211CSA ,Microprocessor Voltage Monitors with Programmable Voltage DetectionELECTRICAL CHARACTERISTICS (continued)(V+ = 5V, T = +25°C, unless otherwise noted.)AMAX8211 MAX8212 ..
MAX4373FESA+-MAX4373FEUA+-MAX4373HESA+-MAX4373HEUA+-MAX4373HEUA+T-MAX4373TEUA+-MAX4374HEUB+-MAX4374HEUB+T-MAX4374TEUB+-MAX4374TEUB+T-MAX4375FEUB+-MAX4375HESD+-MAX4375HESD+T-MAX4375HEUB+-MAX4375TESD+T-MAX4375TEUB+-MAX4375TEUB+T
Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs
MAX4373/MAX4374/MAX4375Low-Cost, Micropower, High-Side
Current-Sense Amplifier +
Comparator + Reference ICsEVALUATION KIT AVAILABLE
General DescriptionThe MAX4373/MAX4374/MAX4375 low-cost, micropow-
er, high-side current-sense supervisors contain a high-
side current-sense amplifier, bandgap reference, and
comparator with latching output. They feature a voltage
output that eliminates the need for gain-setting resistors,
making them ideal for today’s notebook computers, cell
phones, and other systems where battery/DC current
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 0 to +28V input common-mode range is
independent of the supply voltage, which ensures that
the current-sense feedback remains viable even when
connected to a battery pack in deep discharge.
The comparator output of the MAX4373/MAX4374/
MAX4375 is latched to provide a turn-off flag that
doesn’t oscillate. In addition, the MAX4374/MAX4375
contain a second comparator for use in window-detec-
tion functions. The MAX4373/MAX4374/MAX4375 are
available in three different gain versions (T = +20V/V,
F = +50V/V, H = +100V/V) and use an external sense
resistor to set the sensitivity of the input voltage to the
load current. These features offer a high level of inte-
gration, resulting in a simple and compact current-
sense solution.
The MAX4373/MAX4374/MAX4375 operate from a sin-
gle +2.7V to +28V supply and consume 50µA. They are
specified for the extended operating temperature range
(-40°C to +85°C) and are available in 8-pin and 10-pin
µMAX® packages.
ApplicationsNotebook Computers
Portable/Battery-Powered Systems
Smart Battery Packs/Chargers
Cell Phones
Power-Management Systems
General-System/Board-Level Current Monitoring
Precision Current Sources
Benefits and FeaturesIntegrated Current-Sensing Solution Simplifies High-
Side Current MonitoringCurrent-Sense Amplifier plus Internal Comparator
and Bandgap Reference with Improved Accuracy1mV (max) Input Offset Voltage2% (max) Full-Scale AccuracyInternal Bandgap Reference (±1.6% Accuracy)
High Accuracy +2V to +28V Common-Mode Range,
Functional Down to 0V, Independent of Supply
Voltage Ensures Current Monitoring Even In Deep
Discharge of Battery Pack
Low Power Consumption Extends Battery Life50µA Supply CurrentSingle +2.7V to +28V Operating Supply
Latching Comparator Output Eliminates Oscillation
Three Gain Versions (+20V/V, +50V/V,
+100V/V) Support Different Size Battery Packs
MAX4373
RS-RS+
OUT
CIN
LOAD/
BATTERY
VCC = 2.7V TO 28V
VIN = 0 TO 28V
GND
VCC
RSENSE
+ VSENSE -
ILOAD
VPULL-UP
(UP TO 5V)
COUT
0.1µF
RESET
Pin Configurations appear at end of data sheet.+Denotes a lead(Pb)-free/RoHS-compliant package.
Ordering Information continued at end of data sheet.
Ordering Information
PARTTEMP RANGEPIN-
PACKAGE
GAIN
(V/V)
MAX4373TEUA+-40°C to +85°C8 µMAX+20
MAX4373TESA+-40°C to +85°C8 SO+20
MAX4373FEUA+-40°C to +85°C8 µMAX+50
MAX4373FESA+-40°C to +85°C8 SO+50
MAX4373HEUA+-40°C to +85°C8 µMAX+100
MAX4373HESA+-40°C to +85°C8 SO+100
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
MAX4373/MAX4374/MAX4375Low-Cost, Micropower, High-Side
Current-Sense Amplifier +
Comparator + Reference ICs
Absolute Maximum Ratings
Electrical Characteristics(VCC= +2.7V to +28V, VRS+= 0 to +28V, VSENSE= 0V, VRESET= 0V, RLOAD= 1MΩ, TA= TMINto TMAX, 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 the lesser of
(VCC+ 0.3V) or +15V
CIN1, CIN2, RESET to GND........................-0.3V to the lesser of
(VCC+ 0.3V) or +12V
Differential Input Voltage (VRS+ - VRS-)..............................±0.3V
COUT1, COUT2 to GND........................................-0.3V to +6.0V
Current into Any Pin..........................................................±10mA
Continuous Power Dissipation (TA= +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
10-Pin µMAX (derate 5.6mW/°C above +70°C)...........444mW
14-Pin SO (derate 8.3mW/°C above +70°C)................667mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
PARAMETERSYMBOLMINTYPMAXUNITS-252.0Input Bias Current
IRS+02.5
Leakage CurrentIRS+, IRS-±0.015±0.5µA
Supply CurrentICC50100µA
IRS-04
Full-Scale Sense Voltage
(Note 4)VSENSE150170mV100120
Common-Mode Input Range
(Note 3)
Operating Voltage Range
(Note 2)VCC2.728V
VCMR028V
Common-Mode RejectionCMR85dB
OUT Voltage HighVCC -
VOH0.25V
CONDITIONSVRS+ ≤2V
VRS+ > 2V
VCC = 0V, VRS+ = 28V
VRS+ > 2V, VSENSE = 5mV
VRS+ > 2V
VRS+ ≤2V
VCC= 2.7V, IOUT= -500µA, VRS+ = 12V
Gain = +20V/V, +50V/V, VRS+ = 12V
Gain = +100V/V, VRS+ = 12V
VRS+ > 2V
Input Offset VoltageVOS0.11VCC = VRS+= 12V
(Note 11)= +25°C= TMINto TMAX2
8.565IOUT= 100µA
IOUT= 10µAOUT Voltage LowVOUT2.5mVVCC= 2.7V,
VRS+ = 12V
±0.30±2TA= +25°C
VSENSE=
100mV
(Note 6)
VCC= 12V,
VRS+= 12VTA= TMINto TMAX
±0.35±2VCC= 28V,
VRS+= 28V
TA= +25°CTA= TMINto TMAX
±5.0VCC= 12V, VRS+= 0.1V
VSENSE= 6.25mV, VCC= 12V,
VRS+= 12V (Note 7)
Total OUT Voltage Error
(Note 5)VOUT
±5.0
MAX4373/MAX4374/MAX4375Low-Cost, Micropower, High-Side
Current-Sense Amplifier +
Comparator + Reference ICs
Electrical Characteristics (continued)(VCC= +2.7V to +28V, VRS+= 0 to +28V, VSENSE= 0V, VRESET= 0V, RLOAD= 1MΩ, TA= TMINto TMAX, unless otherwise noted.
Typical values are at TA= +25°C.) (Note 1)
±0.3±1.7
±2.7TA= -40°C to +85°C= +25°CVSENSE=
20mV to 100mV,
VCC= 12V, VRS+=
12V,Gain = 100
Output Low VoltageVOL0.6VISINK = 1mA
Propagation Delay4µsCL= 10pF, RL= 10kΩpull-up to 5V,
5mV of overdrive
Input Bias CurrentIB±2.2±15nA
Comparator Hysteresis-9mV
0.1msSaturation Recovery Time
(Note 8)VCC= 12V, VRS+= 12V, CLOAD = 10pF
Power-Supply Rejection
Power-Up Time to 1% of Final
Value
PSRVSENSE= 100mV to
6.25mV
VSENSE= 6.25mV to
100mV
±2.7TA= -40°C to +85°C= +25°C
+50
+100
MAX437_F
MAX437_H
VSENSE= 6.25mV
VSENSE= 100mV,
Gain = +100V/V
VSENSE= 100mV,
Gain = +50V/V
VSENSE= 100mV,
Gain = +20V/V
PARAMETERSYMBOLMINTYPMAXUNITS87
OUT Output ResistanceROUT1.5Ω
Capacitive Load Stability1000pF
OUT Settling Time to 1% of
Final Value
Comparator Threshold VTH590600610mV
Gain
-3dB BandwidthBW
kHz
+20
V/V
Gain AccuracyΔAV
±0.3±1.7
CONDITIONSVOUT = 2V, VRS+ > 2V
VSENSE = 100mV
No sustained oscillations
Gain = +20V/V,
VCC= 12V,
VRS+= 12V,
CLOAD= 10pF
VSENSE= 100mV, CLOAD= 10pF,
VCC = 12V, VRS+= 12V= +25°C
VRS+= 12V,
VCC= 12V,
CLOAD= 10pF
MAX437_T
VSENSE=
20mV to 150mV;
VCC= 12V; VRS+=
12V;Gain = 20, 50
586614TA= TMINto TMAX
COMPARATOR (Note 9)
MAX4373/MAX4374/MAX4375Low-Cost, Micropower, High-Side
Current-Sense Amplifier +
Comparator + Reference ICs
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4373 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (MAX4373
MAX4374/MAX4375
VSENSE = 5mV
SUPPLY CURRENT
vs. COMMON-MODE VOLTAGE
MAX4373 toc02
COMMON-MODE VOLTAGE (V)
SUPPLY CURRENT (MAX4374/MAX4375
MAX4373
VSENSE = 5mV
TOTAL OUTPUT ERROR
vs. SUPPLY VOLTAGE
MAX4373 toc03
SUPPLY VOLTAGE (V)
OUTPUT ERROR (%)
AV = +100V/V
AV = +20V/V
AV = +50V/V
VSENSE = 100mV
Note 1:All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design.
Note 2:Guaranteed by PSR test.
Note 3:Guaranteed by OUT Voltage Error test.
Note 4:Guaranteed by Gain Accuracy test. Output voltage is internally clamped not to exceed 12V.
Note 5:Total OUT Voltage Error and Full-Scale Accuracy are the sum of gain and offset voltage errors.
Note 6:Measured at IOUT= -500µA (RLOAD= 4kΩfor gain of +20V/V, RLOAD= 10kΩfor gain of +50V/V, RLOAD= 20kΩfor gain of
+100V/V).
Note 7:+6.25mV = 1/16 of +100mV full-scale voltage.
Note 8:The device will not experience phase reversal when overdriven.
Note 9:All comparator tests are done with VRS+= +12V.
Note 10:VPULL-UPis defined as an externally applied voltage through a resistor to pull up the comparator output.
Note 11:VOSis extrapolated from the gain accuracy test.
Electrical Characteristics (continued)(VCC= +2.7V to +28V, VRS+= 0 to +28V, VSENSE= 0V, VRESET= 0V, RLOAD= 1MΩ, TA= TMINto TMAX, unless otherwise noted.
Typical values are at TA= +25°C.) (Note 1)
VCC= 28V, VPULL-UP= 5V (Note 10)
CONDITIONS1Output High Leakage Current
UNITSMINTYPMAXSYMBOLPARAMETER2.0VIHRESETInput High Voltage0.8VILRESETInput Low Voltage
VIL = 0,VIH= 5.5V, VCC= 28VµA-0.50.5IIL, IIHLogic Input Current3tRPDRESETPropagation Delay1.5tRPWMinimum RESETPulse Width
Typical Operating Characteristics(VRS+ = +12V, VCC = +12V, RLOAD = 1MΩ, VRESET= 0V, VSENSE = 100mV, VPULL-UP= +5V, RPULL-UP= 10kΩ, TA= +25°C, unless
otherwise noted.)
MAX4373/MAX4374/MAX4375Low-Cost, Micropower, High-Side
Current-Sense Amplifier +
Comparator + Reference ICs8410121416182022242628
TOTAL OUTPUT ERROR
vs. SUPPLY VOLTAGEMAX4373 toc04
SUPPLY VOLTAGE (V)
OUTPUT ERROR (%)
AV = +50V/V
AV = +20V/V
AV = +100V/V
VSENSE = 6.25mV
TOTAL OUTPUT ERROR
vs. SENSE VOLTAGE
MAX4373 toc05
VSENSE (mV)
OUTPUT ERROR (%)AV = +50V/V
AV = +20V/V
AV = +100V/V
VCC = +5.5V
TOTAL OUTPUT ERROR
vs. SENSE VOLTAGE
MAX4373 toc06
VSENSE (mV)
OUTPUT ERROR (%)AV = +50V/V
AV = +100V/VAV = +20V/V
TOTAL OUTPUT ERROR
vs. SENSE VOLTAGE
MAX4373 toc07
VSENSE (mV)
OUTPUT ERROR (%)
AV = +50V/V
AV = +20V/V
AV = +100V/V
VCC = +28V8410121416182022242628
TOTAL OUTPUT ERROR
vs. COMMON-MODE VOLTAGEMAX4373 toc08
COMMON-MODE VOLTAGE (V)
OUTPUT ERROR (%)AV = +50V/V
AV = +100V/V
AV = +20V/V
INPUT
OUTPUT
20μs/div
200mV
600mV
30mV
10mV
SMALL-SIGNAL PULSE RESPONSE
(AV = +20V/V)MAX4373 toc09
INPUT
OUTPUT
20μs/div
500mV
1.5V
30mV
10mV
SMALL-SIGNAL PULSE RESPONSE
(AV = +50V/V)MAX4373 toc10
INPUT
OUTPUT
20μs/div
30mV
10mV
SMALL-SIGNAL PULSE RESPONSE
(AV = +100V/V)MAX4373 toc11
Typical Operating Characteristics (continued)(VRS+ = +12V, VCC = +12V, RLOAD = 1MΩ, VRESET= 0V, VSENSE = 100mV, VPULL-UP= +5V, RPULL-UP= 10kΩ, TA= +25°C, unless
otherwise noted.)
MAX4373/MAX4374/MAX4375Low-Cost, Micropower, High-Side
Current-Sense Amplifier +
Comparator + Reference ICs
INPUT
OUTPUT
20μs/div
150mV
50mV
LARGE-SIGNAL PULSE RESPONSE
(AV = +20V/V)MAX4373 toc12
INPUT
OUTPUT
20μs/div
2.5V
7.5V
150mV
50mV
LARGE-SIGNAL PULSE RESPONSE
(AV = +50V/V)MAX4373 toc13
INPUT
OUTPUT
20μs/div
500mV
9.5V
95mV
5mV
LARGE-SIGNAL PULSE RESPONSE
(AV = +100V/V)MAX4373 toc14
-1001001k10k100k
COMMON-MODE REJECTION
vs. FREQUENCYMAX4373 toc15
FREQUENCY (Hz)
CMR (dB)
-1001001k10k100k
POWER-SUPPLY REJECTION
vs. FREQUENCYMAX4373 toc16
FREQUENCY (Hz)
PSR (dB)
-20100k10k1000k
SMALL-SIGNAL GAIN
vs. FREQUENCYMAX4373 toc17
GAIN (dB)
AV = +50V/V
AV = +100V/V
AV = +20V/V10k100k
LARGE-SIGNAL GAIN
vs. FREQUENCYMAX4373 toc18
GAIN (dB)
VIN = 100mVP-P (20, 50)
VIN = 50mVP-P (100)
AV = +50V/V
AV = +20V/V
AV = +100V/V
Typical Operating Characteristics (continued)(VRS+ = +12V, VCC = +12V, RLOAD = 1MΩ, VRESET= 0V, VSENSE = 100mV, VPULL-UP= +5V, RPULL-UP= 10kΩ, TA= +25°C, unless
otherwise noted.)
MAX4373/MAX4374/MAX4375Low-Cost, Micropower, High-Side
Current-Sense Amplifier +
Comparator + Reference ICs
VCC
OUTPUT
100μs/div
POWER-UP DELAYMAX4373 toc19
AV = +20V/V
OUTPUT
VCC
COMPARATOR POWER-UP DELAYMAX4373 toc20
VCC = VPULL-UP
10µs/div
COMPARATOR TRIP POINT vs.
SUPPLY VOLTAGE
MAX4373 toc21
SUPPLY VOLTAGE (V)
TRIP POINT (mV)
INPUT
125mV/div
OUTPUT
2.5V/div
2μs/div
COMPARATOR PROPAGATION DELAYMAX4373 toc22
VOD = 5mV
COMPARATOR PROPAGATION DELAY
vs. OVERDRIVE VOLTAGE
MAX4373 toc24
OVERDRIVE VOLTAGE (mV)
PROGAGATION DELAY (
COMPARATOR PROPAGATION DELAY
vs. TEMPERATURE
MAX4373 toc26
TEMPERATURE (°C)
PROPAGATION DELAY (
VOD = 5mV
Typical Operating Characteristics (continued)(VRS+ = +12V, VCC = +12V, RLOAD = 1MΩ, VRESET= 0V, VSENSE = 100mV, VPULL-UP= +5V, RPULL-UP= 10kΩ, TA= +25°C, unless
otherwise noted.)
