TL431BIDCKTE4

Overview

The TL431BIDCKTE4 is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.5 V to 36 V and provides an initial accuracy of ±0.5%. The device supports a maximum output current of 100 mA and features a minimum cathode current of 1 mA for regulation. It is housed in a compact SC-70 (SOT-363) surface-mount package with six pins. The component is designed for operation across a temperature range of -40 °C to +85 °C.

Feature Summary

• Provides precise adjustable voltage reference functionality via a three-terminal shunt regulator topology.
• Delivers high initial accuracy of ±0.5% over the specified operating temperature range.
• Supports wide input voltage operation up to 36 V with a low minimum cathode current requirement.

Applications

• Precision voltage references in power supply circuits
• Comparator applications requiring stable reference thresholds
• Linear regulator feedback loops

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS standards during procurement. Confirm the package type matches the SC-70 footprint requirements for the target PCB layout. Ensure the ordering quantity aligns with manufacturer standard packaging specifications to avoid partial reel issues.

Selection Notes

Select this component when a compact surface-mount solution is required for high-accuracy voltage referencing. The ±0.5% tolerance makes it suitable for applications demanding tighter control than standard ±1% variants. Consider the SC-70 package size constraints against available board space and thermal dissipation needs.

Part Context

This part belongs to the TL431 family of adjustable shunt regulators, widely used as a versatile reference element in analog and mixed-signal circuits. The 'B' designation typically denotes the ±0.5% accuracy grade, while 'I' indicates the industrial temperature range. The 'CKT' suffix specifies the SC-70 tape-and-reel packaging format.

Replacement Considerations

Direct substitutes include the TL431ACDCKTE4, though it offers lower ±1% accuracy. For equivalent performance, verify availability of other ±0.5% graded variants within the same package family from Texas Instruments or qualified second-source manufacturers.