AZ431-B
ADJUSTABLE PRECISION SHUNT REGULATORS
Description
The AZ431-B 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.
Pin Assignments
(Top View)
ANODE
3
The output voltage of AZ431-B can be set to any value between VREF
(2.5V) and the corresponding maximum cathode voltage.
The AZ431-B precision reference is offered in two voltage tolerance:
0.4% and 0.8%.
This IC is available in 4 packages: TO-92 (bulk or ammo packing),
SOT-23, SOT-23-5 and SOT-89.
1
2
REF
CATHODE
SOT-23
(Top View)
(Top View)
1
2
3
REF ANODE CATHODE
SOT-89
(Top View)
Features
Programmable Precise Output Voltage from 2.5V to 18V
High Stability under Capacitive Load
Low Temperature Deviation: 4.5mV Typical
Low Equivalent Full-range Temperature Coefficient with
20PPM/°C Typical
Sink Current Capacity from 1mA to 100mA
Low Output Noise
Wide Operating Range of -40 to +125°C
Applications
Charger
Voltage Adapter
Switching Power Supply
Graphic Card
Precision Voltage Reference
3 CATHODE
2 ANODE
1 REF
3 CATHODE
2 ANODE
1 REF
TO-92 (Bulk Packing)
TO-92 (Ammo Packing)
(Top View)
NC 1
*2
(Note 1)
CATHODE 3
5 ANODE
4 REF
SOT-23-5
Note 1: * Pin 2 is attached to substrate and
must be connected to ANODE or open
AZ431-B
Document number: DS41517 Rev. 4 - 2
1 of 15
www.diodes.com
October 2018
© Diodes Incorporated
