NOT RECOMMENDED FOR NEW DESIGN AP432/AP432A USE AZ431L ADJUSTABLE PRECISION SHUNT REGULATOR Description Pin Assignments The AP432 and AP432A are 3-terminal adjustable precision shunt (1) SOT25 (2) SO-8 regulators with guaranteed stable temperature over the applicable (Top View) (Top View) extended commercial temperature range. The output voltage may be 1 8 REF set at any level greater than 1.24V (V ) up to 20V merely by CATHODE REF NC 5 ANODE 1 selecting two external resistors that act as a voltage divider network. 2 7 ANODE ANODE NC These devices have a typical output impedance of 0.2. Active output 2 3 ANODE ANODE 6 circuitry provides very sharp turn-on characteristics, making these 4 5 NC NC CATHODE 3 4 REF devices excellent improved replacements for Zener diodes in many applications. (3) SC59 (4) SC59R The precise +/-1% reference voltage tolerance of the (Top View) (Top View) AP432/AP432A make it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating REF 3 3 CATHODE drift and reliability problems associated with it. ANODE 1 ANODE 1 2 CATHODE 2 REF Features Precision Reference Voltage AP432 : 1.24V 1% (5) SOT23 (6) SOT23R AP432A : 1.24V 0.5% (Top View) (Top View) Sink Current Capability: 200mA Minimum Cathode Current for Regulation: 150A 3 CATHODE 3 REF Equivalent Full-Range Temp Coefficient: 30 ppm/C Fast Turn-On Response 1 ANODE ANODE 1 Low Dynamic Output Impedance: 0.2 Programmable Output Voltage to 20V 2 REF 2 CATHOD Low Output Noise Lead Free packages: SOT25, SC59, SC59R and SOT89-3 (7) SOT89-3 Lead-Free Finish RoHS Compliant (Notes 1 & 2) (Top View) SOT23, SOT23R, SOT25, SC59, SC59R, SO-8 and SOT89: Available in Green Molding Compound (No Br, Sb) Halogen and Antimony Free. Green Device (Note 3) 2 3 1 Anode Cathode REF Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied. 2. See NOT RECOMMENDED FOR NEW DESIGN AP432/AP432A USE AZ431L Functional Block Diagram REF (R) + - VREF Anode (A) Functional Block Diagram Cathode (C) REF (R) Anode (A) Absolute Maximum Ratings ( T = +25C, unless otherwise specified.) A Symbol Parameter Rating Unit V Cathode Voltage 20 V CV I Continuous Cathode Current -10 to +250 mA CC I Reference Input Current 10 mA REF T Operating Temperature -20 to +85 C OP T Storage Temperature -65 to +150 C ST SOT23(R) 400 mW SOT25 550 mW Power Dissipation P SC59(R) 400 mW D (Notes 4, 5) SO-8 600 mW SOT89-3 800 mW Notes: 4. T , max = +150C. J 5. Ratings apply to ambient temperature at +25C. 2 of 15 September 2014 AP432/AP432A Diodes Incorporated www.diodes.com Document number: DS31003 Rev. 19 - 3 Cathode (C)