SP782CT 查看數據表（PDF） - Signal Processing Technologies

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SP782CT

Programmable Charge Pump

Signal Processing Technologies 

®

SP782/784

Programmable Charge Pump

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

DESCRIPTION...

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.

+5V

10µF

+

6

13

15

14 LATCH

VCC

SD

C1+

1µF

1 C1–

VDD 11

12

SP782

C2+

5 C2+

VSS 2

1µF

3 C2– GND

D0

D1

16 4

9

8

1µF

1µF

+5V

10µF

+

10µF

10µF

14

C1+

13

VCC

1 C1–

12

C2+ (b)

5 C2+ (a)

3

SP784

C2–

VDD 11

9 D0

8 D1

6 LATCH

SD

15

GND

16

VSS 2

4

10µF

10µF

SP782/SP784 DS/08

SP782/784 Programmable Charge Pump

1

© Copyright 2000 Sipex Corporation

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