REV. B

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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 that

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

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a

ADP3300

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

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2001

50 mA Low Dropout Linear Regulator

FUNCTIONAL BLOCK DIAGRAM

Q2

THERMAL

PROTECTION

Q1

CC

BANDGAP

REF

DRIVER

R1

R2

ADP3300

OUT

IN

ERR

SD

GND

+

–

FEATURES

High Accuracy Over Line and Load:

0.8% @ 25 C,

1.4% Over Temperature

Ultralow Dropout Voltage: 80 mV Typical @ 50 mA

F for Stability

anyCAP = Stable with All Types of Capacitors

(Including MLCC)

Current and Thermal Limiting

Low Noise

Dropout Detector

Low Shutdown Current: 1

A

3.0 V to 12 V Supply Range

–40 C to +85 C Ambient Temperature Range

Several Fixed Voltage Options

Ultrasmall SOT-23 6-Lead Package

Excellent Line and Load Regulation

APPLICATIONS

Cellular Telephones

Notebook, Palmtop Computers

Battery Powered Systems

PCMCIA Regulators

Bar Code Scanners

Camcorders, Cameras

GENERAL DESCRIPTION

The ADP3300 is a member of the ADP330x family of precision

low dropout anyCAP voltage regulators. The ADP3300 stands

out from conventional LDOs with a novel architecture and an

enhanced process. Its patented design requires only a 0.47

µF

output capacitor for stability. This device is stable with any

capacitor, regardless of its ESR (Equivalent Series Resistance)

value, including ceramic types (MLCC) for space restricted appli-

cations. The ADP3300 achieves exceptional accuracy of

±0.8%

at room temperature and

±1.4% overall accuracy over tempera-

ture, line and load variations. The dropout voltage of the

ADP3300 is only 80 mV (typical) at 50 mA.

The ADP3300 operates with a wide input voltage range from

3.0 V to 12 V and delivers a load current in excess of 50 mA.

It features an error flag that signals when the device is about to

lose regulation or when the short circuit or thermal overload

anyCAP is a registered trademark of Analog Devices Inc.

protection is activated. Other features include shutdown and

optional noise reduction capabilities. The ADP330x anyCAP LDO

family offers a wide range of output voltages and output current

levels from 50 mA to 200 mA:

ADP3301 (100 mA)

ADP3302 (100 mA, Dual Output)

ADP3303 (200 mA)

ADP3300-5

NR

OUT

IN

ERR

R1

330k

C2

0.47 F

ON

OFF

SD

GND

C1

0.47 F

+

+

Figure 1. Typical Application Circuit