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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.5% 8SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-40°C ~ 85°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 TL431BIDE4 is a three-terminal adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an input voltage range of 2.5 V to 36 V and provides an internal reference voltage of 2.495 V. The device features a typical output impedance of 0.2 Ω and supports cathode currents from 1 mA to 100 mA. It is housed in an 8-pin SOIC package with a specified initial accuracy of ±0.5%. The component is rated for operation across a temperature range of -40°C to +85°C.
Feature Summary
- Provides precise programmable shunt regulation via two external resistors
- Features low output noise and high stability over temperature variations
- Offers defined turn-on characteristics suitable as a Zener diode replacement
Applications
- Board-level voltage regulation
- Adjustable power supply circuits
- Switching power supply feedback loops
Procurement Notes
Verify the specific suffix 'E4' against current manufacturer documentation, as it may indicate lead-free composition or obsolete status. Confirm availability through authorized distributors, as this part number may be discontinued or superseded by newer revisions. Ensure the 8-SOIC package matches your PCB footprint requirements before finalizing procurement.
Selection Notes
Select this component when a stable, adjustable reference voltage is required in compact surface-mount designs. The ±0.5% tolerance suits applications demanding higher precision than standard Zener diodes. Consider the 8-pin SOIC package constraints and thermal dissipation capabilities relative to the maximum cathode current limits in your specific circuit topology.
Part Context
This device belongs to the TL431 family of programmable parallel regulators. It serves as a direct upgrade to fixed-voltage Zener diodes, offering superior temperature stability and lower dynamic impedance. The family is widely utilized in industrial and commercial electronics for accurate voltage referencing and regulation tasks.
Replacement Considerations
Direct substitutes include the TL431BIDR and TL431BIDRG4. Cross-manufacturer equivalents such as the AS431BKTR-G1 or TL431BW5-7 are available but require verification of pinout compatibility and electrical parameter alignment.
