The ILC6375 is a high efficiency step-down DC-DC con-

troller using a PWM control scheme. The typical efficiency

can be as high as 85% to 90% at 10mA to 1 Amp load.

The ILC6375 drives an external switching transistor to

deliver up to 1 Amp of output current. The internal oscillator

operates at a fixed 100kHz frequency. Meanwhile, the

device is capable of 100% duty cycle thus allowing true low

drop-out operation

to maximize battery life in portable

applications. Output voltage is trimmed to ±2.5% accuracy.

The device includes internal phase compensation and soft-

start circuitry. Available in a tiny SOT-89 package, the

ILC6375 requires an external PNP switching transisitor, an

inductor, a shottky diode and capacitors.

! Up to 1 Amp output current

! 85% to 90% efficiency at 0.5A to1A (V

! 85% efficiency at 10mA (V

! 100% Duty Cycle for ultra low drop-out

! 100kHz ±15% internal oscillator

! 10V(max) input voltage

! ±2.5% precision output

! Tiny SOT-89 package

! Cellular Phones

! Palmtop PCs and PDAs

! Portable instrumentation

! Digital cameras

! High efficiency 5V to 3.3V converter

PWM Co ntrol led

BUFFE R

EXT

+

-

OSC

100kHz

V

OUT

PWM comp

V

re f

Slow Start

V

IN

V

IN

SD

+

V

OUT

1

32

45

ILC6375

GND

L

Tr

R

B

C

IN +

( 10V )

5V/1A

SOT -89-5

(TOP V IEW)

13

2

V

IN

V

OUT

EXT

4

5

GN D

N/C

ILC6375

Ordering Information*

ILC6375CP-33

3.3V+2.5% @100kHz external xtor

ILC6375CP-50

5.5V+2.5% @100kHz external xtor

* Standard product offering comes in tape & reel, quantity

1000 per reel, orientation right for SOT-89

ILC6375

1 Amp SOT-89 Step Down PWM Switcher Controller

Impala Linear Corporation

Impala Linear Corporation

1

(408) 574-3939

www.impalalinear.com

June 1999

ILC6375 1.1

General Description

Features

Applications

Block Diagram

Typical Application

Pin Package Configuration