AS431H
ADJUSTABLE PRECISION SHUNT REGULATORS
Description
Pin Assignments
The AS431H 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.
(Top View)
ANODE
3
The output voltage of AS431H can be set to any value between VREF
(2.495V) and the corresponding maximum cathode voltage (36V).
1
2
The AS431H precision reference is offered in two voltage tolerance:
0.5% and 1.0%.
REF
CATHODE
SOT23
(Normal Pin-out)
This IC is available in 2 packages: TO92 (Ammo Packing) and
SOT23.
(Top View)
ANODE
Features
3
Programmable Precise Output Voltage from 2.495V to 36V
High Stability under Capacitive Load
Low Temperature Deviation: 5mV Typical
Low Equivalent Full-range Temperature Coefficient with
20PPM/°C Typical
1
2
Sink Current Capacity from 0.5mA to 100mA
Low Output Noise
CATHODE
REF
SOT23
Wide Operating Range of -40 to +125°C
(Mirror Pin-out)
Lead-Free Packages, Available in “Green” Molding Compound:
SOT23, TO92 (Ammo Packing)
(Top View)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
3
2
CATHODE
ANODE
REF
Applications
Charger
Voltage Adapter
1
Switching Power Supply
Graphic Card
Precision Voltage Reference
TO92 (Ammo Packing)
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.
1 of 15
www.diodes.com
January 2017
© Diodes Incorporated
AS431H
Document number: DS39284 Rev. 1 - 2