TL431AIPE4

Overview

The TL431AIPE4 is a programmable shunt voltage reference manufactured by Texas Instruments. It operates within an output voltage range of 2.495 V to 36 V and provides an initial accuracy of ±1%. The device supports a maximum cathode current of 100 mA and maintains a typical temperature coefficient of 97 ppm/°C. It functions with a minimum operating current of 1 mA and withstands a maximum series voltage of 37 V. The component is rated for operation between -40°C and +85°C and utilizes an 8-pin PDIP package.

Feature Summary

• Provides precise adjustable voltage regulation via external resistor divider
• Ensures stable performance across wide industrial temperature ranges
• Delivers high dynamic impedance for effective noise rejection

Applications

• Precision power supply regulation circuits
• Portable equipment battery monitoring systems
• Internal voltage reference sources for data converters

Procurement Notes

Verify the specific suffix E4 confirms lead-free compliance and RoHS status against the manufacturer's latest documentation. Confirm the PDIP-8 package dimensions match your PCB footprint requirements. Ensure the ordering code matches the exact accuracy grade required for your design specifications before finalizing procurement.

Selection Notes

Select this component when a low-cost, high-accuracy adjustable reference is needed in through-hole applications. The 1% initial accuracy suits most general-purpose precision designs. Consider the 100 mA current capability for driving moderate loads directly without additional buffering stages.

Part Context

This part belongs to the widely adopted TL431 family of programmable shunt regulators. It serves as a standard industry solution for voltage referencing and regulation tasks. The AI variant denotes improved accuracy compared to standard grades, making it suitable for applications requiring tighter tolerance control than basic versions.

Replacement Considerations

Direct pin-compatible alternatives include the LM431AIZ/NOPB for lower voltage applications or other TI variants like TL431IDR for surface mount needs. Verify electrical parameters such as temperature coefficient and maximum current when substituting with components from different manufacturers.