REV. 0

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a

ADP3607

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., 1999

50 mA Switched Capacitor

Voltage Boost with Regulated Output

FUNCTIONAL BLOCK DIAGRAM

OSC

CLOCK

GEN

1.5 V

S1

GND

V

OUT

S3

FB

V

SENSE

S2

S4

SD

V

IN

+

5.0V

3.3V

4.7 F

+

4.7 F

+

ADP3607-5

4.7 F

OFF

ON

0

SD

*FOR BEST PERFORMANCE, 10 F IS RECOMMENDED

GND

D1

SD103

Figure 1. Typical Application Circuit

FEATURES

Fully Regulated Output Voltage (5 V and Adjustable)

Input Voltage Range From 3 V to 5 V

50 mA Output Current

Output Accuracy:

5%

High Switching Frequency: 250 kHz

SO-8 and TSSOP-8 Packages

–40 C to +85 C Ambient Temperature Range

APPLICATIONS

Computer Peripherals and Add-On Cards

Portable Instruments

Battery Powered Devices

Pagers and Radio Control Receivers

Disk Drives

Mobile Phones

GENERAL DESCRIPTION

The ADP3607 is a 50 mA regulated output switched capacitor

voltage doubler. It provides a regulated output voltage with

minimum voltage loss and requires a minimum number of ex-

ternal components. In addition, the ADP3607 does not require

the use of an inductor.

The internal oscillator of the ADP3607 runs at 500 kHz nomi-

nal frequency, which produces an output switching frequency of

250 kHz. This allows for the use of smaller charge pump and

filter capacitors.

The ADP3607 provides an accuracy of

±5% with a typical shut-

down current of 150

µA. It can also operate from a single posi-

tive input voltage as low as 3 V. The ADP3607 is offered with

the regulation fixed at 5 V, or adjustable via external resistors

over a 3 V to 9 V range.