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AP431 Datasheet(PDF) 1 Page - Diodes Incorporated |
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AP431 Datasheet(HTML) 1 Page - Diodes Incorporated |
1 / 16 page AP431/AP431A ADJUSTABLE PRECISION SHUNT REGULATOR AP431/AP431A Document number: DS31002 Rev. 15 - 2 1 of 16 www.diodes.com June 2010 © Diodes Incorporated Features • Precision reference voltage • AP431: 2.495V ± 1% • AP431A: 2.495V ± 0.5% • Sink current capability: 200mA • Minimum cathode current for regulation: 300 μA • Equivalent full-range temp coefficient: 30 ppm/oC • Fast turn-on response • Low dynamic output impedance: 0.2 Ω • Programmable output voltage to 36V • Low output noise • Lead Free packages: SOT25, SC59, SC59R, SOT89-3L and TO92-3L • SOT23, SOT23R, SOT25, SC59, SC59R, SOP-8L, SOT89-3L, TO92-3L: Available in “Green” Molding Compound (No Br, Sb) • Lead Free Finish/ RoHS Compliant (Note 1) Description The AP431 and 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 Ω. 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/AP431A 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. Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. Typical Application Circuit + + R2 R1 VOUT VIN VOUT = (1+R1/R2)VREF Precision Regulator Cin Cout AP431 |
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