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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.4% 8SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：0°C ~ 70°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 TL1431CDG4 is a precision programmable shunt reference in an 8-pin SOIC package. It features a 0.4% initial voltage tolerance and operates with a cathode current range of 1 mA to 100 mA. The output voltage is adjustable from approximately 2.5 V to 36 V using two external resistors. Designed for commercial applications, it functions over a temperature range of 0°C to 70°C.
Feature Summary
- Provides precise voltage referencing with specified thermal stability across the operating temperature range.
- Features active output circuitry that delivers fast turn-on characteristics suitable for clamp applications.
- Functions as a Zener diode replacement or error amplifier by regulating based on internal reference and amplifier feedback.
Applications
- Adjustable voltage and current referencing
- Secondary side regulation in flyback SMPSs
- Zener diode replacement
- Voltage monitoring circuits
Procurement Notes
Verify the specific suffix 'CDG4' against the manufacturer's official documentation to confirm the device meets commercial temperature requirements (0°C to 70°C) and utilizes the SOIC-8 package. Ensure the ordering information matches the exact part number variant required for the design specifications.
Selection Notes
Select this component when a low-cost, high-accuracy shunt regulator is needed for commercial environments. It is appropriate for designs requiring an adjustable reference voltage up to 36 V with tight initial tolerance. Verify that the application operates within the 0°C to 70°C range and does not require automotive or military grade qualification.
Part Context
This device belongs to the TL1431 family of precision programmable references manufactured by Texas Instruments. The family includes variants such as TL1431Q for automotive use and TL1431M for military applications. The CDG4 designation specifically identifies the commercial temperature grade and surface-mount packaging configuration.
Replacement Considerations
TL1431QDG4
FAQ
What is the minimum cathode current required for regulation?
The device requires a minimum cathode current of 1 mA to maintain proper regulation and linear operation.
How is the output voltage programmed?
The output voltage is set between approximately 2.5 V and 36 V using a resistive divider network connected between the cathode and anode pins, with the midpoint tied to the reference pin.
