Diodes Incorporated — Analog and discrete power solutions
SOT23

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SOT25

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AZ431-A

ADJUSTABLE PRECISION SHUNT REGULATORS

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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

Type Shunt regulator
Compliance (Only Automotive supports PPAP) Standard
AEC Qualified No
ReferenceVoltage (V) 2.5 V
Tolerance (%) 0.8, 0.4 %
Maximum Input Voltage (V) 40 V
Sink Current (mA) 100 mA
Minimum Cathode Current for Regulation Typ (µA) 400 µA
Typical Temperature Coefficient (ppm/°C) 11 ppm/°C
Maximum Slope Resistance (Ω) 0.5 Ω
Operating Ambient Temperature Range (°C) -40 to 125 °C

Related Content

Packages

Technical Documents

SPICE Model

Recommended Soldering Techniques

TN1.pdf

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)
PCN-2331 2018-03-22 2018-06-22 Additional Qualified BOM (Bill of Materials) on Selected Devices