AZ431-A
ADJUSTABLE PRECISION SHUNT REGULATORS
Description Pin Assignments
The AZ431-A is a three-terminal adjustable shunt regulator with
guaranteed thermal stability over a full operation range. It features (Top View)
sharp turn-on characteristics, low temperature coefficient and low
ANODE
output impedance, which make it ideal substitute for Zener diode in
3
applications such as switching power supply, charger and other
adjustable regulators.
The output voltage of AZ431-A can be set to any value between V
REF
(2.5V) and the corresponding maximum cathode voltage (36V).
1
2
The AZ431-A precision reference is offered in two voltage tolerance:
REF CATHODE
0.4% and 0.8%.
SOT23
This IC is available in 3 packages: TO92 (Bulk or Ammo Packing),
(Top View) (Top View)
SOT23 and SOT89.
Features
Programmable Precise Output Voltage from 2.5V to 36V
High Stability under Capacitive Load
Low Temperature Deviation: 4.5mV Typical
Low Equivalent Full-range Temperature Coefficient with
1 2 3 1 2 3
20PPM/C Typical
REF ANODE CATHODE
REF ANODE CATHODE
Sink Current Capacity from 1mA to 100mA
Low Output Noise
SOT89 (Option 1) SOT89 (Option 2)
Wide Operating Range of -40 to +125C
Lead-Free Packages: TO92, SOT23, SOT89
(Top View) (Top View)
Totally Lead-Free; RoHS Compliant (Notes 1 & 2)
Lead-Free Packages, Available in Green Molding Compound:
3 CATHODE
3
TO92, SOT23 CATHODE
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. Green Device (Note 3)
ANODE
2
2 ANODE
Applications
1 REF
1
REF
Charger
Voltage Adapter
TO92 (Bulk Packing) TO92 (Ammo Packing)
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) & 2015/863/EU (RoHS 3) compliant.
2. See
AZ431-A
Typical Applications Circuit
Shunt Regulator
High Current Shunt Regulator
Current Source or Current Limit
2 of 19
AZ431-A March 2018
Diodes Incorporated
www.diodes.com
Document number: DS36721 Rev. 6 - 2