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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.5% 8SO
- Series：-
- Mfr：Semtech Corporation
- Package：Tape & Reel (TR)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：30 V
- Current - Output：130 µA
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
- Grade：-
- Qualification：-
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Overview
The SC431CS-.5 TRT is a three-terminal adjustable shunt regulator manufactured by Semtech Corporation. It features a trimmed bandgap design with a typical dynamic output impedance of 0.25 Ω and an operating current range from 130 µA to 150 mA. The output voltage is adjustable from 2.5 V (VREF) to 30 V using two external resistors. This component serves as an alternate for TL141, TL431, LM431, and AS431 devices. It is available in SOT-23-3 packages and supports industrial temperature ranges.
Feature Summary
- Trimmed bandgap design ensures high thermal stability over the operating temperature range.
- Active output circuitry provides a sharp turn-on characteristic suitable for replacing Zener diodes.
- Low dynamic output impedance of 0.25 Ω typ. maintains regulation accuracy under varying load conditions.
Applications
- Switching Power Supplies
- Linear Regulators
- Adjustable Supplies
Procurement Notes
Verify that the specific suffix matches the required package type and tape-and-reel configuration. Confirm RoHS compliance status if environmental regulations apply to the target assembly. Ensure the ordering code aligns with the manufacturer's current production lifecycle status before finalizing procurement plans.
Selection Notes
Select this component when a low-cost, high-precision shunt reference is needed for feedback loops. It is suitable for designs requiring operation down to 130 µA cathode current. Consider its compatibility with existing TL431 footprints if migrating from legacy designs.
Part Context
The SC431 series represents Semtech's programmable precision references designed for general-purpose voltage regulation. These devices utilize internal bandgap references to provide stable output voltages. The SC431CS-.5 TRT variant specifically denotes the surface-mount packaging and reel quantity configuration offered by the manufacturer.
Replacement Considerations
This device is documented as an alternate for TL1431, TL431, LM431, and AS431. Verify pinout compatibility and electrical specifications against these legacy parts before substitution.
