REV.

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

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

Tel: 781/329-4700

www.analog.com

Fax:

©

Analog Devices, Inc. All rights reserved.

ADP3334

Adjustable Low Dropout Regulator

FEATURES

High Accuracy over Line and Load:

0.9% @ 25 C,

1.8% over Temperature

500 mA Current Capability

Ultralow Dropout Voltage

F for Stability

anyCAP = Stable with Any Type of Capacitor

(Including MLCC)

Current and Thermal Limiting

Low Noise

Low Shutdown Current: < 1.0

A (Typ)

2.6 V to 11 V Supply Range

1.5 V to 10 V Output Range

–40 C to +85 C Ambient Temperature Range

APPLICATIONS

Cellular Phones

TFT LCD Modules

Camcorders, Cameras

Networking Systems, DSL/Cable Modems

Cable Set-Top Boxes

DSP Supplies

Personal Digital Assistants

GENERAL DESCRIPTION

The ADP3334 is a member of the ADP333x family of precision

low dropout anyCAP voltage regulators. The ADP3334 operates

with an input voltage range of 2.6 V to 11 V and delivers a

continuous load current up to 500 mA. The novel anyCAP

architecture requires only a very small 1 µF output capacitor for

stability, and the LDO is insensitive to the capacitor’s equivalent

series resistance (ESR). This makes the ADP3334 stable with any

capacitor, including ceramic (MLCC) types for space restricted

applications.

The ADP3334 achieves exceptional accuracy of ±0.9% at room

temperature and ±1.8% over temperature, line, and load. The

dropout voltage of the ADP3334 is only 200 mV (typical) at

500 mA. This device also includes a safety current limit, ther-

mal overload protection, and a shutdown feature. In shutdown

mode, the ground current is reduced to less than 1 µA. The

ADP3334 has low quiescent current of 90 µA (typical) in light

load situations.

FUNCTIONAL BLOCK DIAGRAM

THERMAL

PROTECTION

CC

IN

ADP3334

OUT

GND

Q1

BAND GAP

REF

DRIVER

FB

SD

The ADP3334 is available in three different package options:

1. Excellent thermal capability, space saving 3 mm

3 mm LFCSP.

2. Popular low profile MSOP-8.

3. Traditional thermal enhanced SOIC-8.

ADP3334

OUT

IN

GND

ON

OFF

IN

OUT

R1

R2

SD

1 F

FB

1 F

Figure 1. Typical Application Circuit

2014

C

781/461-3113