Datasheet AP431S (Diodes)

AP431S/AP431SH LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR Description Pin Assignments
The AP431S/AP431SH is a 3-terminal adjustable shunt regulator with guaranteed thermal stability over a full operation range. It
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features sharp turn-on characteristics, low-temperature coefficient A N O D E ANODE and low output impedance, which makes it ideal substitute for Zener 3 3 diode in applications such as switching power supply, charger and other adjustable regulators. The AP431S/AP431SH has the same electrical specifications as the industry standard 431 except that it features a low minimum cathode 1 2 1 2 current for regulation. The typical value of 50μA makes the parts R E F C A T H O D E CATHODE REF ideal for very low power dissipation applications.
SOT23 (Package Code: N) SOT23 (Package Code: N1)
The output voltage of the AP431S/AP431SH can be set to any value between VREF (2.5V/2.495V) and the corresponding maximum
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cathode voltage (36V). The AP431S/AP431SH is offered in two grade initial voltage tolerance at +25°C, 0.5% and 1%. This IC is available in 3 packages: TO-92 (Ammo Packing), SOT23 1 2 3 and SOT89. 1 2 3 REF ANODE CATHODE REF ANODE CATHODE
Features SOT89 (Option 1) SOT89 (Option 2)
 Low Minimum Cathode Current for Regulation: 50μA (typ.), 100μA (
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max.)  Programmable Precise Output Voltage from 2.5V/2.495V to 36V  High Stability Under Capacitive Load  Low Deviation of Reference Voltage Over Full Temperature Range: 11mV typical (-40°C to +125°C)  Sink Current Capacity from 100µA to 100mA  Low Dynamic Impedance: 0.1Ω (typ.)  Wide Operating Temperature Range: -40C to +125°C
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) TO-92 (Ammo Packing) Halogen and Antimony Free. “Green” Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP Applications capable, and manufactured in IATF 16949 certified facilities),
 Chargers
please contact us or your local Diodes representative.
 Voltage adapters
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 Switching power supplies  Graphic cards  Precision voltage references Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. AP431S/AP431SH 1 of 17 February 2024 Document number: DS39195 Rev. 3 - 2
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