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CAT102

Precision, Adjustable Shunt Regulator (600mV Reference)



Features Description Applications

FEATURES
  • 600mv low voltage reference
  • 35ppm low temperature coefficient
  • ±6mV initial accuracy
  • High PSRR: 45dB at 300kHz
  • Better line regulation: 1mV (VINfrom 2.2V to 18V)
  • Low supply current: 90µA
  • Open drain output
  • Directly drives optocouplers
  • Industrial temperature range: -40°C to 85°C
  • RoHS-compliant 5-lead TSOT-23 package
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 (IN) 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.

APPLICATIONS
  • SMPS control loop
  • Low temperature coefficient voltage reference
  • Power management
  • Replaces zener diodes
  • Isolated DC-to-DC converters
  • Network, telecom and cellular base station power supplies
  • Adjustable voltage reference
 
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PRESS  RELEASE
Catalyst Semiconductor Voltage Regulators Target Power Supply Market (October 22, 2003)
 
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