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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 1% SOT23
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：1.24V
- Voltage - Output (Max)：18 V
- Current - Output：100 mA
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The AZ9431BQSA-7 is an automotive-compliant adjustable precision shunt regulator manufactured by Diodes Incorporated. It operates within a cathode voltage range of VREF to 18V and supports a continuous cathode current from 0.1mA to 100mA. The device features a reference voltage tolerance of 1% at +25°C, with a typical temperature deviation of 3mV over the full operating range of -40°C to +125°C. It exhibits a low equivalent full-range temperature coefficient of 20PPM/°C and a dynamic output resistance of 0.05Ω typical.
Feature Summary
- Adjustable precise output voltage programmable between 1.24V and 18V using two external resistors
- High stability under capacitive load conditions for reliable operation
- Low temperature deviation and low dynamic output impedance characteristics
- Qualified to AEC-Q100 standards with PPAP capability for high reliability
Applications
- Automotive applications requiring specific change control
- High-reliability applications needing improved zener performance
- Shunt regulator circuits
- Current source or current limit implementations
Procurement Notes
Verify that the component matches the exact part number AZ9431BQSA-7 to ensure correct 1% tolerance specification. Confirm package type is SOT23 and check for AEC-Q100 Grade 1 qualification status. Ensure compliance with RoHS directives and confirm lead-free manufacturing details before procurement.
Selection Notes
Select this component when an adjustable shunt regulator with automotive-grade reliability is required. The 1% initial accuracy suits precision applications where tighter tolerances than standard Zeners are needed. Verify that the application circuit can support the minimum cathode current of 0.1mA for proper regulation across the specified temperature range.
Part Context
This device belongs to the AZ9431Q series of adjustable precision shunt regulators. It serves as a direct replacement for fixed-voltage Zener diodes in circuits demanding better thermal stability and lower output impedance. The series includes variants with different initial accuracies, such as the 0.5% AZ9431AQSA-7.
Replacement Considerations
The commercial version AZ431L datasheet is referenced for non-automotive qualified alternatives. Direct substitutes within the same family include the AZ9431AQSA-7 for higher precision requirements.
