AIC1401

PWM Step-Down Switching Controller with

Shutdown

Analog Integrations Corporation

4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC

www.analog.com.tw

DS-1401-00 May 24, 01

TEL: 886-3-5772500

FAX: 886-3-5772510

1

l

Operation Voltage up to 15V

l

Voltage-Mode Operation

l

Fast Transient Response

l

Built In Accurate 1.3V Voltage Reference

l

Adjustable

Over

Current

Protection

using

Required

l

Low Shutdown Current

l

200KHz Free-Running Oscillator

l

Built in Soft Start.

l

Notebook PC

l

Advanced PC Mboards

l

Information PCs

l

Servers and Workstations

l

PC Add-On Cards

The AIC1401 is a high efficiency, PWM step-

down, voltage-mode, switching controller. It is

suitable for IA, Notebook, LCD PC and LCD

monitor main power applications.

The built-in high voltage CMOS driver drives an

external N-channel MOSFET for replacing the

higher cost P-channel MOSFET in a standard

buck topology.

The 200KHz switching frequency allows using

smaller external components while maintaining

high

conversion

efficiency.

The

11MHz

bandwidth and 6V/us slew rate of the error

amplifier

ensures

the

higher

converter

bandwidth and the fast transient response.

The

AIC1401

also

features

over

current

protection. It provides adjustable over current

trigger point and short-circuit protections by

sensing the output current across the on

resistance of the external N-channel MOSFET

rather then an expensive external low value

sense resistor.

ORDER NUMBER

AIC1401CS

(SOP8)

PIN CONFIGURATION

TOP VIEW

LX

1

3

4

2

VCC

/SHDN

COMP

FB

UG

GND

8

6

5

7

OCSET

PACKAGE TYPE

S: SMALL OUTLINE

TEMPERATURE RANGE

C: 0

°C ~+70°C

AIC1401-XX