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Product Detailed Parameters
- Description：IC VREF SHUNT 36V 0.5% SOT23
- Series：-
- Mfr：Taiwan Semiconductor Corporation
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Programmable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23
- Grade：-
- Qualification：-
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Overview
The TS431BCX RFG is a three-terminal programmable shunt voltage reference manufactured by Taiwan Semiconductor in an SOT-23 package. It features a nominal reference voltage of 2.495V with an initial accuracy of ±0.5%. The device operates within a cathode voltage range from VREF to 36V and supports a continuous cathode current range of 1mA to 100mA. It exhibits a typical dynamic output impedance of 0.22Ω and an equivalent full-range temperature coefficient of 50ppm/°C. The component is RoHS compliant, halogen-free, and designed for surface mount installation.
Feature Summary
- Programmable shunt regulation capability using two external resistors
- High precision reference voltage with low temperature drift
- Fast turn-on response and low output noise characteristics
- Wide operating current range suitable for various load conditions
Applications
- Switching Mode Power Supplies (SMPS)
- Lighting systems
- Telecommunication equipment
- Home appliances
Procurement Notes
Verify the specific suffix 'RFG' against the manufacturer's ordering information to confirm packaging details such as reel size and quantity. Ensure the selected variant matches the required tolerance class, as the 'B' designation indicates ±0.5% accuracy. Confirm moisture sensitivity level requirements and storage conditions prior to assembly to maintain component integrity during the manufacturing process.
Selection Notes
Select this component when a stable, adjustable voltage reference is needed in a compact SOT-23 footprint. The ±0.5% accuracy makes it suitable for applications requiring tighter tolerances than standard Zener diodes. Consider the stability boundary conditions regarding load capacitance; avoid capacitance values between 10nF and 1µF directly across the device if operating at light cathode currents to prevent oscillation.
Part Context
This part belongs to the TS431 series of programmable shunt regulators produced by Taiwan Semiconductor. The series includes variants like TS431ACX RFG with ±1% accuracy. These devices serve as direct replacements for traditional Zener diodes in digital voltmeters, power supplies, and operational amplifier circuitry, offering superior performance in terms of temperature stability and dynamic impedance.
Replacement Considerations
TS431ACX RFG
FAQ
What are the stability requirements regarding load capacitance?
The device may become unstable with capacitances between approximately 10nF and 1µF at light cathode currents. To ensure stability, use no capacitance directly across the device or use a large capacitance (≥10µF). If located at the load, the decoupling capacitor must be ≤1nF or ≥10µF.
How is the reference voltage programmed?
The output voltage is programmable from VREF (2.495V) up to 36 volts using two external resistors connected to the reference pin.
