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SP784CT Datasheet

  • SP784CT

  • Programmable Charge Pump

  • 16頁

  • SIPEX

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廬
SP782/784
Programmable Charge Pump
s
+5V Only Low Power Voltage Conversion
s
Programmable Between
鹵5V
or
鹵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
鹵10V
voltage or a
鹵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
10碌F
+
+5V
13
14
C1+
C1鈥?/div>
C2+ (b)
C2+ (a)
C2鈥?/div>
D0
D1
LATCH
SD
GND
16
4
V
CC
10碌F
10碌F
+
10碌F
1
1碌F
6
14
1碌F
1
12
5
1碌F
3
C1鈥?/div>
C2+
C2+
C2鈥?GND
16 4
LATCH
C1+
13
15
12
5
V
DD
11
V
CC
SD
V
DD
11
10碌F
3
SP784
SP782
V
SS
D0
9
D1
8
2
1碌F
9
8
6
15
V
SS
2
10碌F
SP782/SP784 DS/08
SP782/784 Programmable Charge Pump
漏 Copyright 2000 Sipex Corporation
1

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