Features: ` Low-Cost, Compact Current-Sense Solution
` 30A Supply Current
` 2.7V to 28V Operating Supply
` 0.18% Full-Scale Accuracy
` 0.3mV Input Offset Voltage
` Low 1.5 Output Impedance
` Three Gain Versions Available
20V/V (MAX4372T)
50V/V (MAX4372F)
100V/V (MAX4372H)
` Wide 0 to 28V Common-Mode Range, Independent of Supply Voltage
` Available in a Space-Saving 5-Pin SOT23 PackageApplication·Power-Management Systems
·General-System/Board-Level Current Monitoring
·Notebook Computers
·Portable/Battery-Powered Systems
·Smart-Battery Packs/Chargers
·Cell Phones
·Precision-Current SourcesPinout
SpecificationsVCC, RS+, RS- to GND ............................................-0.3V to +30V
OUT to GND ...........................................................-0.3V to +15V
Differential Input Voltage (VRS+ - VRS-) ............................±0.3V
Current into Any Pin.........................................................±10mA
Continuous Power Dissipation (TA = +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
Operating Temperature Range ........................-40°C to +85°C
Storage Temperature Range ..........................-65°C to +150°C
Lead Temperature (soldering, 10s). ...............................+300°C
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.
DescriptionThe MAX4372T low-cost, precision, high-side currentsense amplifier is available in a tiny, space-saving SOT23-5-pin package. Offered in three gain versions (T = 20V/V, F = 50V/V, and H = 100V/V), this device operates from a single 2.7V to 28V supply and consumes only 30A. The MAX4372T features a voltage output that eliminates the need for gain-setting resistors and is ideal for today's notebook computers, cell phones, and other systems where battery/DC current monitoring is critical.
High-side current monitoring MAX4372T 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 connected to a 2-cell battery pack in deep discharge.
The user can set the full-scale current reading of MAX4372T by choosing the device (T, F, or H) with the desired voltage gain and selecting the appropriate external sense resistor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current- sense solution. For higher bandwidth applications of MAX4372T, refer to the MAX4173T/F/H data sheet.
MAX4372T Data Sheet
