General Description

The CM431A is a three-terminal adjustable shunt voltage regulator with specified thermal stability and pin-to-pin compatible with the earlier 431 series. The output voltage can be adjusted to any value between VREF and 18V by using two external resistors. The CM431A offers low output impedance for improved load regulation with a typical output impedance of 200mW. Because of the active output circuitry, the CM431A can replace the zener diodes in applications such as switching power supplies, OVP crowbar circuits, references for A/D, D/A converters with improved turn-on characteristics.

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Features

• Initial voltage reference accuracy of 1.0%.
• Sink current capability from 1mA to 100mA
• Typical output dynamic impedance less than 200mW
• Adjustable output voltage from VREF to 18V
• Available in SOT-23, SOT-89, TO-92, & SOP-8
• Low output noise
• Typical equivalent full range temperature coefficient of 30ppm/˘J

• Voltage Reference
• Precision shunt regulator
• High current shunt regulator
• PWM down converter with reference
• Voltage monitor

• CM431A: TO-92, SOT-23-3,SOT-23-5, SOT-89, SOP-08 (S08)

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Datasheet PDF file