www.fairchildsemi.com

REV. 1.0.2 3/28/02

Features

• Inverts, Doubles or Splits Input Supply Voltage

• 90% Typ Conversion Efficiency at 100mA load current

• 0.5V Typ Loss at 100mA Load

• Low 160µA Operating Current

•5.

0Ω Typ Output Resistance for C1 = C2 = 100µF

• Selectable Oscillator Frequency: 5kHz/50kHz

• 8-pin SOIC package.

Applications

General Description

The FAN5660 is a monolithic charge-pump which can

invert, double or split a +1.5V to +5.5V input voltage.

Using only two identical low-cost capacitors, the charge

pump replaces switching regulators, thus eliminating

inductors and their associated cost, size, and EMI. The

device has a greater than 90% efficiency over most of its load

current range and a typical operating current of only 160µA.

The FAN5660 is ideal for both battery-powered and board-

level voltage conversion applications.

In order to enable the user optimize capacitor size and

quiescent current, the FAN5660 is offered with a frequency

control (FC) pin which selects either 5kHz or 50kHz

operation.

The Oscillator frequency can also be driven with an external

clock. The FAN5660 is available in 8-pin small-outline

packages.

Simplified Block Diagram

VSH

LV

FC

CONTROL

OSCILLATOR

SYNC

CAP+

CAP–

V+

VSS

FAN5660

Monolithic Inductorless CMOS DC/DC Converter