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AZ431-B

ADJUSTABLE PRECISION SHUNT REGULATORS

Datasheet

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Description

The AZ431-A 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 AZ431-A can be set to any value between VREF (2.5V) and the corresponding maximum cathode voltage (36V). The AZ431-A precision reference is offered in two voltage tolerance: 0.4% and 0.8%.

Feature(s)

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 20PPM/°C Typical
Sink Current Capacity from 1mA to 100mA
Low Output Noise
Wide Operating Range of -40 to 125°C

Application(s)

Charger
Voltage Adapter
Switching Power Supply
Graphic Card
Precision Voltage Reference

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP)	Standard
AEC Qualified	No
ReferenceVoltage (V)	2.5
Accuracy (%)	0.8, 0.4
MaximumInput Voltage (V)	18
Sink Current (mA)	100
Power Supply Rejection Ratio (dB)	-
Minimum Cathode Current for Regulation Typ (µA)	400
Maximum Slope Resistance (Ω)	0.5
Operating Ambient Temperature Range (°C)	-40 to 125

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Our shunt voltage regulator portfolio includes 2.5V, 1.24V, and 0.6V reference voltage devices covering consumer, computing, industrial, and automotive applications.

It includes industry standard TL431 and TL432 equivalents, as well as footprint compatible, very low minimum (knee) current for latest low standby power isolated power supplies. Additionally, it includes a well enhanced operating voltage range TLV431 (1.24V) equivalents. All of the 2.5V and 1.24V support operating temperatures up to 125°C as standard, therefore reducing the number of variants that need to be qualified and stocked.

Automotive-compliant variants are available which are qualified to AEC-Q100 Grade 1 in IATF 16949 facilities supporting PPAP documentation.

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2611	2023-04-03	2023-07-03	Qualified Additional Assembly Test Sites, Die Revision and Tape and Reel Packing Quantity.
PCN-2492	2020-11-04	2021-05-04	Device End of Life (EOL)