The AZ431AN-ATRG1 from Diodes Incorporated is a three-terminal adjustable precision shunt regulator integrating a precision voltage reference and error amplifier. This version provides a typical reference voltage of 2.500V with ±0.4% initial accuracy, corresponding to a specified reference-voltage range of 2.490V to 2.510V under the stated test conditions.
Using two external resistors, the regulated output can be programmed from approximately 2.5V to 36V. Its recommended cathode-current range is 1mA to 100mA, with a typical minimum regulation current of 0.4mA and a specified maximum of 1mA. It provides a more precise and adjustable alternative to conventional Zener diodes.
The device offers a typical dynamic impedance of 0.15Ω, with a maximum value of 0.5Ω. Typical reference-input current is 0.7μA, with a maximum of 4μA. Reference-voltage deviation over the −40°C to +125°C temperature range is typically 4.5mV and specified at up to 16mV.
AZ431AN-ATRG1 supports an operating ambient-temperature range from −40°C to +125°C. The recommended maximum cathode voltage is 36V, while the absolute maximum cathode voltage is 40V. Maximum rated power dissipation for the SOT-23 package is 370mW, subject to PCB layout and thermal derating.
The component is supplied in a three-pin SOT-23 surface-mount package. Pin 1 is REF, pin 2 is the cathode, and pin 3 is the anode. The ordering code identifies ±0.4% accuracy, SOT-23 packaging, tape-and-reel supply, and a RoHS-compliant Green package. Its marking code is GA1, with 3,000 units per reel.
Key Specifications:
- Manufacturer: Diodes Incorporated
- Manufacturer Part Number: AZ431AN-ATRG1
- Device Type: Adjustable Precision Shunt Regulator
- Typical Reference Voltage: 2.500V
- Reference-Voltage Range: 2.490V to 2.510V
- Initial Accuracy: ±0.4%
- Programmable Output Range: Approximately 2.5V to 36V
- Recommended Cathode Current: 1mA to 100mA
- Absolute Maximum Cathode Voltage: 40V
- Typical Minimum Regulation Current: 0.4mA
- Maximum Minimum Regulation Current: 1mA
- Typical Dynamic Impedance: 0.15Ω
- Maximum Dynamic Impedance: 0.5Ω
- Typical Reference-Input Current: 0.7μA
- Maximum Reference-Input Current: 4μA
- Operating Temperature: −40°C to +125°C
- Maximum Junction Temperature: +150°C
- Maximum SOT-23 Power Dissipation: 370mW
- Package: SOT-23
- Number of Pins: 3
- Device Marking: GA1
- Packaging: Tape and Reel
- Standard Reel Quantity: 3,000 Units
- Compliance: RoHS-Compliant Green Device
The electrical, package, and ordering specifications above are based on the official Diodes Incorporated datasheet.
Typical Applications:
Suitable for switching-power-supply feedback, chargers, power adapters, adjustable regulators, precision voltage references, current sources, current-limit circuits, and graphics-card power systems. Cathode current, resistor tolerance, capacitive-load stability, power dissipation, and PCB layout should be evaluated in the final design.
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