AIC1741

LOW DROPOUT ADJUSTABLE REGULATOR

SPEC NO: DS-1741-00

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

FEATURES

1% Accuracy 1.235V Voltage Reference.

Fast Transient Response.

Low Ground Current at 55

µA.

Wide Output Current Range, 10

µA~80mA.

Output Programmable from 1.235V~11V.

Low Temperature Coefficiency.

Error Flag Warns of Output Dropout.

APPLICATIONS

Voltage Regulator for Pentium

Wireless Communication System.

5V to 3.3V Regulator for VGA Cards.

Battery Powered Systems.

DESCRIPTION

The AIC1741 is a low power precision adjustable

regulator with 80mA output capability. The device

can be used as a secondary regular to provide

feedback in a switching power supply.

The AIC1741 circuitry includes an internal wide

band amplifier, a precision bandgap reference,

and a PMOS output transistor. The feedback

input can be connected to an external resistor

divider to program the sensed output voltage.

The

VOUT

pin

provides

loop

frequency

compensation when used as a part of a larger

servo system.

Although the device works as a stand-alone

regulator, it can also drive an NPN power

transistor to construct a high current low dropout

regulator, with only very minor current loss to

ground.

TYPICAL APPLICATION CIRCUIT

C2

33

µF

+

C1

10

µF

+

C3

R1

390

R2

1.2K

R3

2K

Q1

TIP31C

NC

NC

6

5

4

2

3

AIC1741

8

7

1

FB

FLAG

GND

NC

VIN

VOUT

5V

3.3V/3 A

10

µF

+

5V to 3.3V Regulator for VGA Cards.

ORDERING INFORMATION

AIC1741 XX

ORDER NUMBER

AIC1741CN

(PLASTIC DIP)

AIC1741CS

(PLASTIC SO)

PIN CONFIGURATION

TOP VIEW

FLAG

1

3

4

2

8

6

5

7

VIN

NC

GND

NC

FB

NC

VOUT

PACKAGE TYPE

N: PLASTIC DIP

S: SMALL OUTLINE

TEMPERATURE RANGE

C: 0

°C~+70°C

Pentium

®

is a registered trademark of Intel Corporation