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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.5% SOT23
- Series：-
- Mfr：Diodes Incorporated
- Package：Bulk
- 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：Automotive
- Qualification：AEC-Q100
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Overview
The AZ9431AQSA-7 is an automotive-compliant, three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It operates within a cathode voltage range of VREF to 18V and supports a continuous sink current from 0.1mA to 100mA. The device features a reference voltage tolerance of 0.5% at +25°C (1.234V to 1.246V) and maintains stability across an operating temperature range of -40°C to +125°C. Packaged in SOT-23, it offers low dynamic output resistance (0.05Ω typical) and a temperature coefficient of 20PPM/°C.
Feature Summary
- AEC-Q100 qualified for high reliability with PPAP capability
- Wide programmable precise output voltage from 1.24V to 18V
- High stability under capacitive load conditions
- Low temperature deviation and low dynamic output resistance
Applications
- Automotive electronic systems requiring specific change control
- High-reliability applications replacing Zener diodes
- Precision voltage references in power management circuits
- Current sources or current limit configurations
Procurement Notes
Verify the component matches the specified 0.5% initial accuracy variant. Confirm the package type is SOT-23 and that the part carries AEC-Q100 Grade 1 qualification. Ensure compliance with RoHS and halogen-free requirements as defined by the manufacturer's green product standards before finalizing procurement specifications.
Selection Notes
Select this component when an adjustable shunt regulator with automotive-grade reliability is required. The 0.5% tolerance provides tighter precision than the 1.0% variant. Consider the SOT-23 package size constraints and the need for external resistors to set the output voltage between 1.24V and 18V. Verify thermal dissipation capabilities if operating near maximum current limits.
Part Context
This part belongs to the AZ9431Q series, designed specifically for automotive and high-reliability environments. It serves as a direct upgrade to standard Zener diodes, offering improved performance characteristics such as lower temperature coefficients and better stability. The series includes variants with different voltage tolerances to suit various precision requirements.
Replacement Considerations
The AZ9431BQSA-7 is a confirmed substitute within the same series, differing only in having a 1.0% voltage tolerance instead of 0.5%. Both parts share identical electrical ratings, packaging, and automotive qualifications.
