CAT102 datasheet(1/9 Pages) CATALYST

No. de pieza	CAT102

Descripción Electrónicos	Precision, Adjustable Shunt Regulator (600mV Reference)

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Fabricante Electrónico	CATALYST [Catalyst Semiconductor]

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FEATURES

s Low voltage reference: 600mV

s Low temperature coefficient reference: 25ppm

s Accurate 600mV reference voltage:

+6mV at T

J=25°C

s High PSRR: 45dB at 300kHz

s High line rejection: +1mV (V

CC from 2.2V to 18V)

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

°C to

105

°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.

CAT102

Precision, Adjustable Shunt Regulator (600mV Reference)

- +1% Initial Accuracy

- SOT23 Package

s Low supply current: 300

µA

s Open collector output

s Directly drives optocouplers

s Compact 5-lead SOT23 package

s Industrial temperature range: -40

°°°°°C to 85°°°°°C

Characteristics subject to change without notice

Doc. No. 4007, Rev. L

APPLICATIONS

s SMPS control loop

s Low temperature coefficient voltage reference

s Power management

s Replaces zener diodes

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

PIN CONFIGURATION

s Isolated DC-to-DC converters

s Network, telecom and cellular base station

power supplies

s Adjustable voltage reference

+

–

+

–

OUT

FB

IN

VREF

600mV

Error

Amplifier

GND

3

5

2

1

SOT23-5

TOP VIEW

IN

OUT

2

3

1

NC

5

4

FB

GND

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