General Description

The AMC7136 is a constant current regulator for

driving LEDs with low quiescent current and low

dropout voltage. The current is adjustable from

10mA to 400mA with an external resistor.

Only one external resistor is required to achieve a

constant current LED driver.

Soft start, thermal protection and low voltage

protection are also provided.

A driver pin DR is provided for current and

voltage extension. Adding an external NMOS or

NPN transistor to this pin can extend current and

voltage range.

Features

y Sink current: 10mA to 400mA adjustable

with an external resistor

y Current and voltage range extendable by

adding an external NMOS or NPN transistor

y Power supply voltage: 2.7-6V

y Low drop out voltage: 100mV@350mA

y Low quiescent current: 250uA

y Thermal protection

y Soft start

y Low voltage protection: 2.5V

y SOT-89-5 package

Applications

y Power Led driver