 2002 Microchip Technology Inc.

DS21468B-page 1

M

TC7662A

Features

• Wide Operating Range

- 3V to 18V

• Increased Output Current (40mA)

• Pin Compatible with ICL7662/SI7661/TC7660/

LTC1044

• No External Diodes Required

-40

Ω Typ.

• No Low-Voltage Terminal Required

• CMOS Construction

• Available in 8-Pin PDIP and 8-Pin CERDIP

Packages

Applications

• Laptop Computers

• Disk Drives

• Process Instrumentation

•

µP-based Controllers

Device Selection Table

Package Type

General Description

The TC7662A is a pin-compatible upgrade to the

industry standard TC7660 charge pump voltage

converter. It converts a +3V to +18V input to a

corresponding -3V to -18V output using only two low-

cost

capacitors,

eliminating

inductors

and

their

associated cost, size and EMI. In addition to a wider

power supply input range (3V to 18V versus 1.5V to

10V for the TC7660), the TC7662A can source output

currents as high as 40mA. The on-board oscillator

operates at a nominal frequency of 12kHz. Operation

below 12kHz (for lower supply current applications) is

also possible by connecting an external capacitor from

OSC to ground.

The TC7662A directly is recommended for designs

requiring greater output current and/or lower input/

output voltage drop. It is available in 8-pin PDIP and

CERDIP packages in commercial and extended

temperature ranges.

Part

Number

Package

Operating

Temp.

Range

TC7662ACPA

8-Pin PDIP

0°C to +70°C

TC7662AEPA

8-Pin PDIP

-40°C to +85°C

TC7662AIJA

8-Pin CERDIP

-25°C to +85°C

TC7662AMJA

8-Pin CERDIP

-55°C to +125°C

1

2

3

4

8

7

6

5

TC7662A

NC

C+

GND

C–

NC

OSC

8-Pin PDIP

8-Pin CERDIP

Charge Pump DC-to-DC Converter