Datasheet MAX4373, MAX4374, MAX4375 (Maxim)

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MAX4373/MAX4374/MAX4375 Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs General Description Benefits and Features
The MAX4373/MAX4374/MAX4375 low-cost, micropow-
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Integrated Current-Sensing Solution Simplifies High- er, high-side current-sense supervisors contain a high- Side Current Monitoring side current-sense amplifier, bandgap reference, and • Current-Sense Amplifier plus Internal Comparator comparator with latching output. They feature a voltage and Bandgap Reference with Improved Accuracy output that eliminates the need for gain-setting resistors, • 1mV (max) Input Offset Voltage making them ideal for today’s notebook computers, cell • 2% (max) Full-Scale Accuracy phones, and other systems where battery/DC current • Internal Bandgap Reference (±1.6% Accuracy) monitoring is critical. High-side current monitoring is especially useful in battery-powered systems since it
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High Accuracy +2V to +28V Common-Mode Range, does not interfere with the ground path of the battery Functional Down to 0V, Independent of Supply charger. The 0 to +28V input common-mode range is Voltage Ensures Current Monitoring Even In Deep independent of the supply voltage, which ensures that Discharge of Battery Pack the current-sense feedback remains viable even when
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Low Power Consumption Extends Battery Life connected to a battery pack in deep discharge. • 50µA Supply Current The comparator output of the MAX4373/MAX4374/ • Single +2.7V to +28V Operating Supply MAX4375 is latched to provide a turn-off flag that
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Latching Comparator Output Eliminates Oscillation doesn’t oscillate. In addition, the MAX4374/MAX4375
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Three Gain Versions (+20V/V, +50V/V, contain a second comparator for use in window-detec- +100V/V) Support Different Size Battery Packs tion functions. The MAX4373/MAX4374/MAX4375 are available in three different gain versions (T = +20V/V,
Ordering Information
F = +50V/V, H = +100V/V) and use an external sense resistor to set the sensitivity of the input voltage to the
PIN- GAIN PART TEMP RANGE
load current. These features offer a high level of inte-
PACKAGE (V/V)
gration, resulting in a simple and compact current-
MAX4373
TEUA+ -40°C to +85°C 8 µMAX +20 sense solution. MAX4373TESA+ -40°C to +85°C 8 SO +20 The MAX4373/MAX4374/MAX4375 operate from a sin- MAX4373FEUA+ -40°C to +85°C 8 µMAX +50 gle +2.7V to +28V supply and consume 50µA. They are MAX4373FESA+ -40°C to +85°C 8 SO +50 specified for the extended operating temperature range (-40°C to +85°C) and are available in 8-pin and 10-pin MAX4373HEUA+ -40°C to +85°C 8 µMAX +100 µMAX® packages. MAX4373HESA+ -40°C to +85°C 8 SO +100 +Denotes a lead(Pb)-free/RoHS-compliant package.
Applications Ordering Information continued at end of data sheet.
Notebook Computers
Typical Operating Circuit
Portable/Battery-Powered Systems ILOAD + VSENSE - Smart Battery Packs/Chargers VIN = 0 TO 28V RSENSE Cell Phones LOAD/ Power-Management Systems RS+ RS- BATTERY General-System/Board-Level Current Monitoring VCC = 2.7V TO 28V VCC C1 Precision Current Sources 0.1µF MAX4373 OUT VPULL-UP (UP TO 5V) R1 R3 CIN COUT R2 RESET µMAX is a registered trademark of Maxim Integrated Products, Inc. GND
Pin Configurations appear at end of data sheet.
19-1630; Rev 5; 5/15