AS431I Datasheet, PDF (1/17 Pages) BCD Semiconductor Manufacturing Limited – LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR

Description
A Product Line of
Diodes Incorporated
AS431I
LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR
Features
The AS431I is a three-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 impedance, which make it ideal substitute for Zener diode in
applications such as switching power supply, charger and other
adjustable regulators.
The output voltage of AS431I can be set to any value between VREF
(2.5V) and the corresponding maximum cathode voltage (36V).
The AS431I is offered in two grade initial voltage tolerance at +25^oC,
0.5%, and 1%.
This IC is available in 3 packages: TO-92 (bulk or ammo packing),
SOT-23 and SOT-89.
 Programmable Precise Output Voltage from 2.5V to 36V
 High Stability Under Capacitive Load
 Low Minimum Cathode Current for Regulation: 10µA (Typ.), 50µA
(Max.)
 Low Temperature Deviation: 4.5mV Typical
 Sink Current Capacity from 50µA to 100mA
 Low Output Noise
 Wide Operating Range: -40 to +125^oC
 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
 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.
Pin Assignments
(Top View)
ANODE
3
(Top View)
(Top View)
1
REF
2
CATHODE
SOT-23
1
2
3
REF ANODE CATHODE
SOT-89 (Option 1)
1
2
3
REF ANODE CATHODE
SOT-89 (Option 2)
AS431I
Document number: DS36816 Rev. 3 - 2
1 of 17
www.diodes.com
July 2014
© Diodes Incorporated