For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

General Description

The MAX4372 low-cost, precision, high-side current-

sense 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 con-

sumes only 30µA. It features a voltage output that elimi-

nates 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 is especially useful in bat-

tery-powered systems since it does not interfere with

the ground path of the battery charger. The input com-

mon-mode range of 0 to 28V is independent of the sup-

ply 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 by

choosing the device (T, F, or H) with the desired volt-

age gain and selecting the appropriate external sense

resistor. This capability offers a high level of integration

and flexibility, resulting in a simple and compact cur-

rent-sense solution. For higher bandwidth applications,

refer to the MAX4173T/F/H data sheet.

Applications

Power-Management Systems

General-System/Board-Level Current Monitoring

Notebook Computers

Portable/Battery-Powered Systems

Smart-Battery Packs/Chargers

Cell Phones

Precision-Current Sources

Features

o Low-Cost, Compact Current-Sense Solution

o 30µA Supply Current

o 2.7V to 28V Operating Supply

o 0.18% Full-Scale Accuracy

o 0.3mV Input Offset Voltage

o Low 1.5Ω Output Impedance

o Three Gain Versions Available

20V/V (MAX4372T)

50V/V (MAX4372F)

100V/V (MAX4372H)

o High Accuracy +2V to +28V Common-Mode

Range, Functional Down to 0V, Independent of

Supply Voltage

o Available in a Space-Saving 5-Pin SOT23 Package

and 3 x 2 UCSP™ (1mm x 1.5mm) Package

Low-Cost, UCSP/SOT23, Micropower, High-Side

Current-Sense Amplifier with Voltage Output

________________________________________________________________

Maxim Integrated Products

1

RS+

15

RS-

MAX4372T/F/H

SOT23-5

UCSP

TOP VIEW

TOP VIEW

(BUMPS ON BOTTOM)

2

34

OUT

OUT

GND

GND

23

1

A

B

MAX4372T/F/H

RS+

RS-

19-1548; Rev 4; 7/09

PART

MAX4372TEUK-T

MAX4372TESA

-40°C to +85°C

-40°C to +85°C

TEMP RANGE PIN-PACKAGE

5 SOT23-5

8 SO

Pin Configurations

Ordering Information

TOP

MARK

ADIU

—

RS-

OUT

A/D

CONVERTER

GND

RS+

0 TO 28V

+2.7V TO +28V

0.1

μF

MAX4372T/F/H

LOAD/

BATTERY

Typical Operating Circuit

Note: Gain values are as follows: 20V/V for the T version, 50V/V

for the F version, and 100V/V for the H version.

Ordering Information continued at end of datasheet.

Pin Configurations continued at end of datasheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

MAX4372TEBT-T

-40°C to +85°C 3 x 2 UCSP

ACX

PART

MAX4372TEUK-T

MAX4372TESA

-40

°C to +85°C

-40

°C to +85°C

TEMP RANGE PIN-PACKAGE

5 SOT23-5

8 SO

Ordering Information

TOP

MARK

ADIU

—

MAX4372TEBT-T -40

°C to +85°C 3 x 2 UCSP

ACX