SGM3132

4-Channel 1-Wire Dimming LED Driver

with Ultra Low Dropout Current Source

GENERAL DESCRIPTION

The SGM3132 is a 4-channel ultra low dropout

constant source parallel LED driver. The SGM3132

uses an internal resistor to set the bias current for four

LEDs.

The SGM3132 incorporates a single wire interface to

program the output current at 16 continuous steps. It

has an internal deglitch circuit for filtering the noise of

the EN input.

The SGM3132 requires only a 35mV dropout voltage at

a 20mA load. The feature makes SGM3132 ideal for

battery-operated systems, such as personal digital

assistants.

The SGM3132 is available in Green TQFN-3×3-16L,

TDFN-2×2-8L and MSOP-8 packages and is specified

over an ambient temperature range of -40

℃ to +85℃.

APPLICATIONS

Wireless Handsets

MP3, MP4, and PMP

Cellular Phones

Portable Communication Devices

Digital Cameras, Camcorders

PDAs, Palmtops, and Handy Terminals

Battery-Powered Equipment

FEATURES

● Ultra Low Dropout: 35mV/20mA

● Support up to 4 LEDs

● LED Sink Current 20mA

● ±3% LED Current Matching

● Deglitch Circuit

● Thermal Shutdown Protection

● 16-Step Brightness Control

● No EMI and Switch Noise

● Operating Temperature Range: -40℃ to +85℃

● Available in Green TQFN-3×3-16L, TDFN-2×2-8L

and MSOP-8 Packages

TYPICAL APPLICATION

1

2

n=16

Pulse Inpput

EN

LED1

LED2

LED3

LED4

AGND

PGND

VIN

SGM3132

2.5V to 5.0V

1µF

REV. A. 2

SG Micro Corp

www.sg-micro.com