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CAT102 Datasheet

  • CAT102

  • Precision, Adjustable Shunt Regulator (600mV Reference)

  • 83.76KB

  • 9頁(yè)

  • CATALYST

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CAT102
Precision, Adjustable Shunt Regulator (600mV Reference)
- +1% Initial Accuracy
FEATURES
s
Low voltage reference: 600mV
s
Low temperature coefficient reference: 25ppm
s
Accurate 600mV reference voltage:
s
Low supply current: 300碌A(chǔ)
s
Open collector output
s
Directly drives optocouplers
s
Compact 5-lead SOT23 package
s
Industrial temperature range: -40擄C to 85擄C
擄
擄
- SOT23 Package
+6mV at T
J
=25擄C
s
High PSRR: 45dB at 300kHz
s
High line rejection: +1mV (V
CC
from 2.2V to 18V)
APPLICATIONS
s
SMPS control loop
s
Low temperature coefficient voltage reference
s
Power management
s
Replaces zener diodes
s
Isolated DC-to-DC converters
s
Network, telecom and cellular base station
power supplies
s
Adjustable voltage reference
DESCRIPTION
The CAT102 is a low-voltage reference and amplifier.
Designed for the control loop of low-voltage power
supplies, the reference voltage has been designed for
600mV. Over a junction temperature from -40擄C to
105擄C the reference voltage is within 8mV of the nominal
600mV. In addition, the error amplifier output and the
supply voltage pin are on separate pins.
Power supply rejection is a high 45dB at 300kHz. The
output, OUT, can sink 20mA at a maximum saturation
voltage of 250mV.
When combined with an optocoupler, the CAT102 can
be used as an error amplifier that controls the feedback
loop in isolated low-output voltage switching power
supplies.
FUNCTIONAL DIAGRAM
IN
5
1
Error
Amplifier
+
VREF
600mV
鈥?/div>
+
鈥?/div>
PIN CONFIGURATION
OUT
3
SOT23-5
TOP VIEW
FB 1
GND 2
OUT 3
4 NC
5 IN
FB
2
GND
漏 2003 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 4007, Rev. L

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