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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.4% 8SOIC
- Series：-
- Mfr：onsemi
- 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 TL431BIDG is a three-terminal programmable shunt regulator diode manufactured by onsemi. It operates as a low temperature coefficient Zener diode, with the reference voltage programmable from Vref to 36 V using two external resistors. The device features an initial accuracy of ±0.4% at 25 °C and a typical dynamic impedance of 0.22 Ω. It supports a cathode current range of 1.0 mA to 100 mA and has a maximum operating voltage of 37 V. The component is housed in an SOIC-8 package (D Suffix) and functions within an ambient temperature range of -40 °C to +85 °C.
Feature Summary
- Programmable output voltage capability up to 36 V via external resistor divider
- High precision voltage reference with ±0.4% tolerance at room temperature
- Low dynamic output impedance for stable regulation performance
- Wide sink current capability ranging from 1.0 mA to 100 mA
Applications
- Digital voltmeters
- Power supplies
- Op amp circuitry
Procurement Notes
Verify the specific suffix 'D' confirms the SOIC-8 surface mount package configuration. Ensure the 'BI' marking code aligns with the required -40 °C to +85 °C industrial temperature grade and ±0.4% tolerance specifications. Confirm RoHS compliance status matches project requirements before finalizing procurement orders.
Selection Notes
Select this component when a precise, adjustable shunt reference is needed to replace standard Zener diodes. The ±0.4% tolerance offers superior accuracy compared to lower-grade variants. The wide operating current range allows flexibility in biasing circuits without compromising regulation stability across the specified industrial temperature spectrum.
Part Context
This part belongs to the TL431A, B series of programmable precision references. These monolithic ICs serve as direct replacements for traditional Zener diodes in various analog applications. The family includes variants with different tolerances and temperature ranges, such as the TL431AI or TL431C, allowing designers to balance cost and performance requirements effectively.
Replacement Considerations
TL431BCDG
FAQ
How is the output voltage programmed?
The reference voltage is programmable from Vref to 36 V using two external resistors connected to the Reference pin.
What is the minimum cathode current for regulation?
The device requires a minimum cathode current of 1.0 mA to maintain proper regulation operation.
