FAN5660 Fairchild Semiconductor, FAN5660 Datasheet

FAN5660

Manufacturer Part Number

FAN5660

Description

Monolithic Inductorless CMOS DC/DC Converter

Manufacturer

Fairchild Semiconductor

Datasheet

1.FAN5660.pdf (9 pages)

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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.

• Selectable Oscillator Frequency: 5kHz/50kHz

• 8-pin SOIC package.

Applications

•

Simpliﬁed Block Diagram

FAN5660

Monolithic Inductorless CMOS DC/DC Converter

Laptop Computers

Medical Instruments

Interface Power Supplies

Hand-Held Instruments

Operational-Ampliﬁer Power Supplies

Typ Output Resistance for C1 = C2 = 100µF

SYNC

VSS

V+

CAP+

OSCILLATOR

CONTROL

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.

CAP–

VSH

www.fairchildsemi.com

REV. 1.0.2 3/28/02

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