AIC1731

300mA, Low Dropout Linear Regulator

with Shutdown

Analog Integrations Corporation

Si-Soft Research Center

DS-1731G-02

20090928

3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.

TEL: 886-3-5772500

FAX: 886-3-5772510

www.analog.com.tw

1

FEATURES

Active Low Shutdown Control.

Very Low Quiescent Current.

Very Low Dropout Voltage of 470mV at 300mA

Output Current (3.0V Output Version)

1.3V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V Output

Voltage.

Short Circuit and Thermal Protection.

±2% Output Tolerance.

Miniature Package: SOT-23-5 and SOT-89-5

APPLICATIONS

PDA

DSC

Notebook

Pagers

Personal Communication Equipment

Cordless Telephones

Portable Instrumentation

Portable Consumer Equipment

Battery Powered Systems

DESCRIPTION

AIC1731 is a 300mA low noise, low dropout

linear regulator, and is housed in small SOT-23-5

and SOT-89-5 package. The device is in the “ON”

state when the SHDN pin is set to logic high

level. An internal P-MOSFET pass transistor is

used to achieve 470mV low dropout voltage at

300mA load current. It offers high precision

output voltage of

±2%. The quality of low

quiescent current and low dropout voltage makes

this device ideal for battery power applications.

The internal reverse bias protection eliminates

the requirement for a reverse voltage protection

diode. The high ripple rejection and low noise of

AIC1731 provide enhanced performance for

critical applications. The noise bypass pin can be

connected an external capacitor to reduce the

output noise level.

TYPICAL APPLICATION CIRCUIT

1

μF

BP

VOUT

SHDN

GND

VIN

AIC1731

1

μF

(Note1)

0.1

μF

SHDN

+

+

Low Noise Low Dropout Linear Regulator