ADVANCED INFORMATION

AIC1594

1A STEP-DOWN PWM REGULATOR

SPEC NO: DS-1594-P1 03/23/00

ANALOG INTEGRATIONS CORPORATION

www.analog.com.tw

4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.

TEL: (8863)577-2500 FAX:(8863)577-2510

1

"

Operating Input Voltage From 4.5V to 36V

"

2.5V, 3.3V, 5V , 12V and Adjustable Output Ver-

sion

"

Adjustable Version Output Voltage Range , 1.25V

to 30V

± 4% max Over Line and Load Regulation

"

Available in TO220-5 and TO263-5 Package

"

Requires Only 4 External Components.

"

150KHz/300KHz Fixed Constant Frequency

"

µA

"

TTL Shutdown Capability.

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Output Overvoltage Protection

"

Current Limit and Thermal Shutdown Protection.

"

1A Guaranteed Output Current

"

Simple High Efficiency Step-down regulator

"

On-Card Switching regulators

The AIC1594 series are step-down monolithic

PWM regulators delivering 1A at fixed voltages of

2.5V , 3.3V, 5.0V , 12V and using a external di-

vider to adjust output voltage from 1.25V to 30V

with excellent line and load regulation.

Switching frequency up to 150KHz/300KHz are

achievable thus allowing smaller sized filter com-

ponents. Internal current limit and thermal shut-

down circuits provide protection from overloads. It

also provides output overvoltage and short pro-

tection under fault conditions.

The internal precious reference combined with

voltage feedback loop provides optimum output

voltage accuracy and fast load transient response.

Packages available are in

standard SOT89-5

and DIP8 for standard assembly and TO263-5,

SOP8 for SMD.

L1

R1

R2

+

C3

+

C1

C2

D1

IN

1

SHDN

OUT

2

FB

4

3

GND

AIC1594

R1 short and R2 open for fixed

switching output version

1A Precision PWM DC/DC Regulator