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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 2.21% 8SOP
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Tube
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-25°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOP
- Grade：-
- Qualification：-
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Overview
The Fairchild Semiconductor TL431CD is a three-terminal adjustable precision shunt regulator housed in an SOIC-8 surface-mount package. It provides a guaranteed thermal stability over applicable temperature ranges, allowing the output voltage to be set to any value between approximately 2.5 volts and 36 volts using two external resistors. The device features a typical dynamic output impedance of 0.2 ohms and an active output circuit that delivers a sharp turn-on characteristic. It supports a sink current capability ranging from 1.0 mA to 100 mA.
Feature Summary
- Programmable output voltage adjustable up to 36 volts via external resistors
- Temperature compensated for operation across full rated operating temperature range
- Active output circuitry ensures fast turn-on response and low noise
Applications
- Board-level voltage regulation
- Adjustable power supplies
- Switching power supply circuits
- Zener diode replacement applications
Procurement Notes
Verify the specific manufacturer designation as Fairchild Semiconductor has been acquired by ON Semiconductor. Confirm the part number suffix matches the required tolerance grade and package variant. Ensure the component source is traceable to authorized distribution channels to guarantee authenticity and compliance with RoHS standards.
Selection Notes
Select this component when a precise, adjustable reference voltage is required in a compact surface-mount form factor. Consider the 0.2 ohm dynamic output impedance for stability requirements. Verify that the operating temperature range aligns with the commercial specifications defined for the CD suffix variant.
Part Context
This device belongs to the TL431 series of programmable shunt regulators. It serves as a high-performance alternative to standard Zener diodes, offering superior accuracy and adjustability. The series is widely utilized in power management designs where stable voltage referencing is critical for system reliability.
Replacement Considerations
Compatible substitutes include the TL431ACD and TL431IDT. These variants maintain similar electrical characteristics but may differ in initial accuracy tolerances or specific package configurations.
