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AZ431AN-ATRE1

TL431-equivalent shunt Vref, +/-1%, SOT-23-3, Diodes Inc

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Manufacturer Part：

AZ431AN-ATRE1

Package：

SOT-23-3 (2.90 x 1.30 x 1.00 mm)

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Description

Product Overview

The AZ431AN-ATRE1 from Diodes Incorporated is a programmable shunt voltage reference with 2.495V internal reference, +/-1% initial accuracy, and 1-100mA cathode current in a SOT-23-3 package.

Key Specifications

Reference Voltage 2.495 V (internal, programmable to 36V)
Initial Accuracy +/-1% (A grade)
Temperature Drift 14 mV max over -40 to +85°C
Cathode Current Range 1 mA to 100 mA
Dynamic Impedance 0.3 Ohm typical
Operating Temperature -40°C to +85°C
Package SOT-23-3

Features

  • TL431-equivalent shunt reference from Diodes Inc in SOT-23-3
  • +/-1% accuracy with 2.495V reference, cost-competitive alternative

Applications

  • SMPS feedback and general-purpose voltage reference

The AZ431AN-ATRE1 from Diodes Incorporated is a TL431-equivalent programmable shunt voltage reference in a SOT-23-3 package. The device provides +/-1% initial accuracy (A grade) with a 2.495V internal bandgap reference programmable to 36V, making it a pin-compatible and functionally equivalent alternative to the TI TL431AIDBZR. The 0.3 Ohm typical dynamic impedance and 1-100mA cathode current range are compatible with standard TL431 application circuits. The Diodes Inc AZ431 series offers a cost-competitive second-source option for high-volume consumer electronics and adapter SMPS designs. The ATRE1 suffix denotes the SOT-23-3 package on tape and reel.

The AZ431AN-ATRE1 operates identically to the TL431. The internal bandgap reference generates 2.495V. The error amplifier compares the REF pin voltage with the internal reference and drives the NPN output transistor to regulate the cathode current. External resistors set the output voltage from 2.495V to 36V. See TL431ACDBZR entry for complete working principle.

Pin Name Function
1 REF Reference input (2.495V threshold)
2 Anode Ground
3 Cathode Output/shunt (1-100mA)
  • Cost-competitive SMPS feedback in consumer electronics adapters
Manufacturer Part Number Package Notes
TI TL431AIDBZR SOT-23-3 Original TL431, same function
onsemi KA431AZTA TO-92 Through-hole version
Diodes AZ431BN-ATRE1 SOT-23-3 +/-0.5% B-grade version
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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