AS431H

Document number: DS39284 Rev. 1 - 2

1 of 15

www.diodes.com

January 2017

© Diodes Incorporated

AS431H

ADJUSTABLE PRECISION SHUNT REGULATORS

Description

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.

(2.495V) and the corresponding maximum cathode voltage (36V).

The AS431H precision reference is offered in two voltage tolerance:

0.5% and 1.0%.

This IC is available in 2 packages: TO92 (Ammo Packing) and

SOT23.

Features



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



Sink Current Capacity from 0.5mA to 100mA



Low Output Noise



Wide Operating Range of -40 to +125°C



Lead-Free P

ackages, Available in “Green” Molding Compound:

SOT23, TO92 (Ammo Packing)



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

Pin Assignments

(Top View)

SOT23

(Normal Pin-out)

(Top View)

SOT23

(Mirror Pin-out)

(Top View)

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.

ANODE

CATHODE

REF

3

2

1

3

2

1

ANODE

CATHODE

REF

REF

CATHODE

ANODE

1

2

3