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SP782/SP784 DS/08

SP782/784 Programmable Charge Pump

© Copyright 2000 Sipex Corporation

SP782/784

Programmable Charge Pump

The SP782 and SP784 are monolithic programmable voltage converters that produce a

positive and negative voltage from a single supply. The SP782 and SP784 are programmable

such that the charge pump outputs either a

±10V voltage or a ±5V voltage by control of two

pins. Both products require four (4) charge pump capacitors to support the resulting output

voltages. The charge pump architecture (U.S. 5,760,637) is fabricated using a low power

BiCMOS process technology.

The SP782 and SP784 charge pumps can be powered from a single +5V supply. The low

power consumption makes these charge pumps ideal for battery operated equipment. Both

offer a shutdown feature that saves battery life. A system can essentially have four (4) different

supply voltages from a single battery. Typical applications are handheld instruments,

notebook and laptop computers, and data acquisition systems.

DESCRIPTION...

s +5V Only Low Power Voltage Conversion

s Programmable Between

±5V or ±10V

s Low Power Shutdown Mode

Applications

s RS-232/RS-423 transceiver power supplies

s LCD BIAS Generator

s OP-Amp Power Supplies

11

+5V

10

µF

+

GND

13

2

SP782

C1+

C1–

C2+

C2–

1

µF

1

µF

1

µF

14

1

5

3

1

µF

16

C2+

12

D0

D1

9

8

4

6

LATCH

SD

15

11

+5V

10

µF

+

8

9

6

15

GND

16

13

D0

D1

LATCH

SD

2

SP784

C1+

C1–

C2+ (a)

C2–

10

µF

10

µF

10

µF

14

1

5

3

10

µF

12

4

C2+ (b)

®