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CA1523_00 Datasheet

  • CA1523_00

  • Voltage Regulator Control Circuit for Variable Switching Reg...

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  • INTERSIL   INTERSIL

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November 2000
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CA1523
Voltage Regulator Control Circuit
for Variable Switching Regulator
Features
鈥?Operates up to 200kHz
鈥?Pins ESD Protected
鈥?Remote ON/OFF
鈥?Slow Start with Reset
鈥?Overcurrent Sensing
鈥?Lower Peak Currents than PWM Regulator
- Less Prone to Magnetic Saturation
Description
The CA1523 monolithic silicon integrated circuit is a variable
interval pulse regulator designed to provide the control cir-
cuitry for use in switching regulator circuits. It operates from
11V to 15V.
The regulator provides a single output drive capable of
300mA source/200mA sink. The maximum operating fre-
quency is better than 200kHz. An attractive feature of the
CA1523 is that the timing capacitor charge and discharge
current is set up externally via a single resistor. The ratio of
charge to discharge current is internally set at a maximum of
2 to 1 allowing simultaneous change in output pulse width
with increased frequency at higher load. The pulse width
variation at higher frequencies effectively compensates for
the losses in magnetics and thereby increases the power
supply efficiency at higher load end by as much as 20
percent.
Part Number Information
PART
NUMBER
CA1523E
TEMPERATURE
RANGE
0
o
C to +70
o
C
PACKAGE
14 Lead Plastic DIP
Pinout
CA1523 (PDIP)
TOP VIEW
ERROR
CURRENT SENSE
GND
RISE TIME
OUTPUT GND
OUTPUT
V
CC
1
2
3
4
5
6
7
14 TIMING
13 ZENER
12 ON/OFF
11 OVER CURRENT
10 SLOW START
9
8
LOGIC OUTPUT
NC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002. All Rights Reserved
1
File Number
1785.3

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