AP431I Datasheet, PDF (1/17 Pages) Diodes Incorporated – LOW CATHODE CUREENT ADJUSTABLE PRECISION SHUNT REGULATOR

AP431i
LOW CATHODE CUREENT ADJUSTABLE PRECISION SHUNT REGULATOR
Description
The AP431i is a 3-terminal adjustable shunt regulator with guaranteed
thermal stability over a full operation range. It features sharp turn-on
characteristics, low temperature coefficient and low output imped-
ance, which makes it ideal substitute for Zener diode in applications
such as switching power supply, charger and other adjustable
regulators.
Pin Assignments
(Top View)
ANODE
3
(Top View)
ANODE
3
The AP431i has the same electrical specifications as the industry
standard 431 except that it features a low minimum cathode current
for regulation. The typical value of 50μA makes the parts ideal for
very low power dissipation applications.
The output voltage of AP431i can be set to any value between VREF
(2.5V/2.495V) and the corresponding maximum cathode voltage
(36V).
1
REF
2
CATHODE
SOT-23 (Package Code: N)
(Top View)
1
2
CATHODE
REF
SOT-23 (Package Code: N1)
(Top View)
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
and SOT-89.
Features
 Low Minimum Cathode Current for Regulation: 50μA (Typ.),
100μA (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: -40°C to +125°C
 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
1
2
3
REF ANODE CATHODE
SOT-89 (Option 1)
(Top View)
TO-92 (Ammo Packing)
1
2
3
REF ANODE CATHODE
SOT-89 (Option 2)
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
Document number: DS37535 Rev. 6 - 2
1 of 17
www.diodes.com
October 2016
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