General Description

The MAX44286 is a zero-drift, high-side current-sense

amplifier family that offers precision, low supply cur-

rent and is available in a tiny 4-bump ultra-thin WLP of

0.78mm x 0.78mm x 0.35mm footprint. This miniature size

is of paramount for today’s applications in smartphones,

mobile accessories, notebooks, portable medical, and all

battery-operated portable devices where current monitor-

ing with precision and space are critical.

The MAX44286 has voltage output offered in four gain

versions of 25V/V, 50V/V, 100V/V, and 200V/V. These

four gain versions offer flexibility in the choice of the

sense resistor and the very low input offset voltage helps

in detecting small currents on the orders of low micro-

amps. Low power capability also offers the possibility of

minimizing power dissipation.

The MAX44286 operates with a supply voltage range

of

automotive temperature range. Supply voltage for the

device is shared with the RS+ pin to fit the MAX44286 in

a 4-bump, ultra-thin WLP package.

Applications

● Power Management Systems

● Portable/Battery-Powered Systems

● Smartphones

● Mobile Accessories

● Portable Medical

● Notebook Computers and Tablets

Features and Benefits

● Ultra-Low Input Offset Voltage and Tiny Gain Error

Allow Sense Resistor to Detect Tiny Currents (nA)

• 30µV (max) Offset Voltage

• 0.23% (max) Gain Accuracy

● Low Current Consumption Saves Power

● Space-Saving 4-Bump WLP Package

• 0.78mm x 0.78mm x 0.35mm

● Industry-Leading Low-Power Supply Range

• 1.6V to 5.5V Input Common Mode

● Four Gain Options Offer Flexibility in Sense Resistor

Selection

• G = 25V/V (MAX44286T)

• G = 50V/V (MAX44286F)

• G = 100V/V (MAX44286H)

• G = 200V/V (MAX44286W)

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part, refer

to

P

B2

B1

GND

MAX44286

A2

RS-

RS+

A1

ADC

GND

LOAD

µC

GND

0.1µF

GND

GND

MAX44286

Low-Power, Precision, 4-Bump WLP,

Current-Sense Amplifier

19-7369; Rev 0; 11/14

Typical Application Circuit

EVALUATION KIT AVAILABLE