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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 TL431BIDG4 is an adjustable precision shunt regulator from Texas Instruments, housed in an 8-pin SOIC package. It provides a reference voltage tolerance of ±0.5% at 25°C and operates within a temperature range of -40°C to +85°C. The device supports an output voltage range from 2.495V to 36V with a maximum sink current of 100mA. Key electrical parameters include a typical temperature coefficient of 92ppm/°C and a maximum input voltage of 37V.
Feature Summary
- Provides high-precision voltage regulation with ±0.5% initial accuracy
- Functions as an adjustable shunt regulator for feedback control loops
- Operates reliably across a wide industrial temperature range
Applications
- Adjustable power supplies
- Switching power supply feedback circuits
- Onboard regulation systems
Procurement Notes
Verify the specific suffix 'DG4' confirms the SOIC-8 package and lead-free composition. Confirm the 'B' grade designation matches the required ±0.5% accuracy specification. Ensure the operating environment stays within the -40°C to +85°C thermal limits defined for this variant. Cross-reference the datasheet revision to ensure compatibility with existing design constraints.
Selection Notes
Select this component when precise voltage referencing is critical for linear or switching regulator topologies. The ±0.5% tolerance offers tighter control than standard grades. The SOIC-8 package facilitates surface-mount assembly. Consider the 100mA sink capability against load requirements. Verify that the 92ppm/°C drift meets system stability needs under varying thermal conditions.
Part Context
This part belongs to the industry-standard TL431 family of three-terminal adjustable shunt regulators. It serves as a versatile reference element in power management circuits. The device replaces Zener diodes by offering sharper turn-on characteristics and lower dynamic impedance. It is widely used in isolated flyback converters and general-purpose voltage monitoring applications.
Replacement Considerations
Compatible replacements include the TLA431 series, which maintains pin compatibility while supporting all capacitive loads without external compensation components. Other variants within the TL431 family may be substituted if accuracy or package type differences are acceptable.
