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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.5% SOT89-3
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-243AA
- Supplier Device Package：SOT-89-3
- Grade：-
- Qualification：-
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Overview
The AS431IARTR-G1 is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It operates within a cathode voltage range of 2.5V to 36V and features an initial voltage tolerance of ±0.5% at +25°C. The device supports a sink current capacity from 50µA to 100mA with a typical low minimum cathode current for regulation of 10µA. It exhibits a low temperature deviation of 4.5mV typically over the full operating temperature range of -40°C to +125°C. The component is housed in an SOT-89 surface-mount package.
Feature Summary
- Adjustable output voltage programmable between 2.5V and 36V
- Guaranteed thermal stability across the full industrial temperature range
- High stability under capacitive load conditions
- Low output noise and low dynamic impedance
Applications
- Switching power supplies
- Chargers
- Voltage adapters
- Graphic cards
- Precision voltage references
Procurement Notes
Verify the specific ordering suffix 'R' corresponds to the SOT-89 package configuration required for your design. Confirm that the RoHS compliant 'G1' marking aligns with environmental regulations applicable to your region. Ensure the tape and reel packing format matches your automated assembly equipment specifications before finalizing procurement orders.
Selection Notes
Select this component when a precise, adjustable reference voltage is needed in a compact surface-mount form factor. The SOT-89 package provides higher thermal dissipation capabilities compared to smaller alternatives like SOT-23. Consider the ±0.5% initial accuracy requirement and the wide operating temperature range suitable for demanding industrial or consumer electronics environments.
Part Context
This part belongs to the AS431 family of low cathode current adjustable precision shunt regulators. It serves as a direct replacement for standard Zener diodes in various circuit topologies. The datasheet explicitly notes that this specific model is not recommended for new designs and suggests using the AP431S series instead.
Replacement Considerations
Public documentation indicates the AP431S series as the recommended alternative for new designs. Verify electrical compatibility and pinout alignment before substituting the AS431IARTR-G1 with other available shunt regulators or updated product lines.
FAQ
What is the minimum cathode current required for regulation?
The minimum cathode current for regulation is typically 10µA and has a maximum specification of 50µA.
Is the AS431IARTR-G1 recommended for new designs?
No, the datasheet explicitly states that this device is not recommended for new designs and recommends using the AP431S series instead.
What packages are available for the AS431I series?
The AS431I series is available in TO-92, SOT-23, and SOT-89 packages.
