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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 2.2% 8SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The TL431QDR is a precision adjustable shunt regulator from Texas Instruments, housed in an SOIC-8 surface-mount package. It operates within a voltage range of 2.495V to 36V with a maximum input voltage of 36V. The device features a typical output impedance of 0.2 ohms and supports cathode currents from 1mA to 100mA. It maintains a temperature coefficient of 92 ppm/°C and functions reliably between -40°C and +125°C.
Feature Summary
- Provides precise programmable reference voltage functionality via external resistors
- Features low output noise and high stability across wide temperature ranges
- Offers robust current sinking capability for effective regulation
Applications
- Board-level voltage regulation circuits
- Adjustable power supply designs
- Switching power supply feedback loops
Procurement Notes
Verify the specific suffix 'Q' indicates automotive qualification status per official documentation. Confirm the SOIC-8 package dimensions match design constraints. Ensure the operating temperature range aligns with system requirements. Cross-reference datasheet revisions for any parameter updates before finalizing procurement specifications.
Selection Notes
Select this component when automotive-grade reliability is required alongside standard shunt regulator performance. Consider the SOIC-8 footprint for PCB layout compatibility. Evaluate the 100mA current capacity against load requirements. Verify thermal management needs given the specified operating temperature limits.
Part Context
This part belongs to the TL431 family of three-terminal adjustable shunt regulators. It serves as a direct replacement for Zener diodes in many applications. The series is widely used for its cost-effectiveness and established industry adoption in power management systems.
Replacement Considerations
Compatible substitutes include other TL431 variants with different accuracy grades or packages. Check pinout compatibility before substitution. Verify electrical parameters such as reference voltage tolerance and operating temperature range match application needs.
