REV. 0

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

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

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

otherwise under any patent or patent rights of Analog Devices.

a

ADP3335

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

Tel: 781/329-4700

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

Fax: 781/326-8703

© Analog Devices, Inc., 2000

FUNCTIONAL BLOCK DIAGRAM

THERMAL

PROTECTION

CC

IN

ADP3335

OUT

R1

R2

GND

Q1

SD

BANDGAP

REF

DRIVER

NR

FEATURES

High Accuracy Over Line and Load:

0.9% @ 25 C,

1.8% Over Temperature

Ultralow Dropout Voltage: 200 mV (Typ) @ 500 mA

F for Stability

anyCAP = Stable with Any Type of Capacitor

(Including MLCC)

Current and Thermal Limiting

Low Noise

Low Shutdown Current: < 1.0

A

2.6 V to 12 V Supply Range

–40 C to +85 C Ambient Temperature Range

Ultrasmall Thermally-Enhanced 8-Lead MSOP Package

APPLICATIONS

PCMCIA Card

Cellular Phones

Camcorders, Cameras

Networking Systems, DSL/Cable Modems

Cable Set-Top Box

MP3/CD Players

DSP Supply

anyCAP is a registered trademark of Analog Devices Inc.

ADP3335

NR

OUT

ON

OFF

SD

GND

1 F

+

OUT

OUT

1 F

+

IN

IN

Figure 1. Typical Application Circuit

GENERAL DESCRIPTION

The ADP3335 is a member of the ADP330x family of precision

low dropout anyCAP voltage regulators. The ADP3335 operates

with an input voltage range of 2.6 V to 12 V and delivers a con-

tinuous load current up to 500 mA. The ADP3335 stands out

from conventional LDOs with the lowest thermal resistance of

any MSOP-8 package and an enhanced process that enables it

to offer performance advantages beyond its competition. Its

patented design requires only a 1.0

µF output capacitor for sta-

bility. This device is insensitive to output capacitor Equivalent

Series Resistance (ESR), and is stable with any good quality

capacitor, including ceramic (MLCC) types for space-restricted

applications. The ADP3335 achieves exceptional accuracy of

±0.9% at room temperature and ±1.8% over temperature, line,

and load. The dropout voltage of the ADP3335 is only 200 mV

(typical) at 500 mA. This device also includes a safety current

limit, thermal overload protection and a shutdown feature. In

shutdown mode, the ground current is reduced to less than

1

µA. The ADP3335 has ultralow quiescent current 80 µA

(typical) in light load situations.