The AP431/AP431A are 3-terminal adjustable precision shunt regulators with guaranteed temperature stability over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 2.495V(VREF) up to 36V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical output impedance of 0.2. Active output circuitry provides very sharp turn-on characteristics, making these devices excellent improved replacements for Zener diodes in many applications.
The precise (+/-) 1% Reference voltage tolerance of the AP431/431A make it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating drift and reliability problems associated with it.
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• Precision reference voltage AP431 : 2.495V ± 1% AP431A : 2.495V ± 0.5%• Sink current capability: 200mA• Minimum cathode current for regulation: 300A• Equivalent full-range temp coefficient: 30 ppm/oC• Fast turn-on response• Low dynamic output impedance: 0.2• Programmable output voltage to 36v• Low output noise.• Packages: TO92, SOT89, SOT23, SOT25 and SOP
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Cathode Voltage .....................................36V
Continuous Cathode Current ....................... -10mA ~ 250mA
Reference Input Current Range ........................ 10mA
Operating Temperature Range (AP431)...................- 20oC ~ 85oC
(AP431I).................... -40oC ~ 85oC
Lead Temperature............................... 260oC
Storage Temperature ............................ 65oC ~ 150oC
Power Dissipation (Notes 1. 2) SOT89 Package .............. 0. 80W
TO92 Package ................ .0.78W
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