Datasheet AP431I (Diodes)

NOT RECOMMENDED FOR NEW DESIGN USE AP431S AP431i LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR Description Pin Assignments
The AP431i is a 3-terminal adjustable shunt regulator with guaranteed thermal stability over a full operation range. It features sharp turn-on
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characteristics, low temperature coefficient and low output imped- AN ODE ANODE ance, which makes it ideal substitute for Zener diode in applications 3 3 such as switching power supply, charger and other adjustable regulators. The AP431i has the same electrical specifications as the industry standard 431 except that it features a low minimum cathode current 1 2 1 2 for regulation. The typical value of 50μA makes the parts ideal for REF CATHODE CATHODE REF very low power dissipation applications.
SOT-23 (Package Code: N) SOT-23 (Package Code: N1)
The output voltage of AP431i can be set to any value between VREF (2.5V/2.495V) and the corresponding maximum cathode voltage
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(36V). The AP431i 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), SOT-23 1 2 3 and SOT-89. 1 2 3 REF ANODE CATHODE REF ANODE CATHODE
Features SOT-89 (Option 1) SOT-89 (Option 2)
 Low Minimum Cathode Current for Regulation: 50μA (Typ.), 100μA (Max.)
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 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 (-40C to +125°C)  Sink Current Capacity from 100µA to 100mA  Low Dynamic Impedance: 0.1Ω (Typ.)  Wide Operating Temperature Range: -40°C to +125°C
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) TO-92 (Ammo Packing) Halogen and Antimony Free. “Green” Device (Note 3
)
Applications
 Charger  Voltage Adapter  Switching Power Supply  Graphic Card  Precision Voltage Reference Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html 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. AP431i 1 of 17 July 2017 Document number: DS37535 Rev. 7 - 3
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