REV. 0

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a

ADP3302

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

World Wide Web Site: http://www.analog.com

Fax: 617/326-8703

© Analog Devices, Inc., 1997

High Precision anyCAP™

Dual Low Dropout Linear Regulator

FUNCTIONAL BLOCK DIAGRAM

(1/2 IS SHOWN)

Q2

THERMAL

PROTECTION

GM

Q1

CC

BANDGAP

REF

DRIVER

R1

R2

ADP3302

OUT

IN

ERR

SD

GND

ADP3302

7

6

2

OUT1

IN

1

5

ERR

330k

Ω

0.47µF

ON

OFF

0.47µF

8

GND

SD1

3

IN

4

OUT2

0.47µF

SD2

Figure 1. Application Circuit

FEATURES

High Accuracy:

0.8%

Ultralow Dropout Voltage: 120 mV @ 100 mA Typical

F for Stability

anyCAP™ = Stable with All Types of Capacitors

Current and Thermal Limiting

Low Noise

Dropout Detector

Multiple Voltage Options

Thermally Enhanced SO-8 Package

APPLICATIONS

Cellular Telephones

Notebook and Palmtop Computers

Battery Powered Systems

Portable Instruments

High Efficiency Linear Regulators

GENERAL DESCRIPTION

The ADP3302 is a member of the ADP330X family of precision

micropower low dropout anyCAP™ regulators. The ADP3302

contains two fully independent 100 mA regulators with separate

shutdown and merged error outputs. It features 1.4% overall

output accuracy and very low, 120 mV typical, dropout voltage.

The ADP3302 has a wide input voltage range from

3 V to

12 V. It features an error flag that signals when either of the

two regulators is about to lose regulation. It has short circuit

current protection as well as thermal shutdown.

The ADP3302’s enhanced lead frame design allows for a maxi-

mum power dissipation of 630 mW @ +70

°C ambient temperature

and 1.0 W at room temperature without any external heat sink.

anyCAP™ is a trademark of Analog Devices, Inc.