AIC1660

Switched-Capacitor Voltage Converter

Analog Integrations Corporation

4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC

www.analog.com.tw

DS-1660T-P4

Oct. 4, 01

TEL: 886-3-5772500

FAX: 886-3-5772510

1

l

Lowest

Output

Impedance

(Typical

35

Ω at

l

Improved Direct Replacement for 7660.

l

1.5V to 6V Operation.

l

No External Diode Required.

l

Simple Conversion of +5V to -5V.

l

Low Quiescent Current (Typical 36

µA at V

l

High Power Efficiency (Typical 98%)

l

Boost Pin for Higher Switching Frequency.

l

Improved SCR Latchup Protection.

l

RS-232 Power Supplies.

l

Handheld Instruments.

l

Data Acquisition Systems.

l

Supply Splitter, V

l

Operational Amplifier Supplies.

l

Panel Meter.

10

µF

C1

Required for

1

8

AIC1660

7

6

5

4

3

2

+

+

10µF

C2

Negative Voltage Converter

The AIC1660 is a monolithic CMOS switched

capacitor voltage converter. Designed to be an

improved direct replacement for the popular 7660

and LTC1044, the main function of the AIC1660 is

to convert a positive input voltage in the range of

1.5V to 6V to the corresponding negative output

voltage in the range of -1.5V to -6V. The input

±nV

The chip contains a series DC power supply

regulator, oscillator, control circuitry and four

output power MOS switches. The frequency of

oscillator can be lowered by the addition of an

external capacitor to the OSC pin, or the oscillator

may be over-driven by an external clock.

The boost function is available to raise the

oscillator frequency to optimize performance in

specific applications. The “LV” terminal may be

≤3V) operation, or be left floating for input voltage

larger than 3V to improve power dissipation.

The AIC1660 provides performance superior to

previous

designs

by

combining

low

output

impedance, low quiescent current with high

efficiency, and by eliminating diode drop voltage

losses. The only required external components

are two low cost electrolytic capacitors.