TLV431ACLPR

Overview

The TLV431ACLPR is a low-voltage, three-terminal adjustable shunt voltage reference manufactured by Texas Instruments. It operates within an input voltage range of up to 7 V and provides an adjustable output voltage between the internal reference of 1.24 V and a maximum of 6 V. The device features an initial accuracy of 1% and a temperature coefficient of 138 PPM/°C. It supports a cathode current range from a minimum of 80 µA to a maximum of 15 mA. Designed for through-hole mounting, it is housed in a TO-92-3 package and functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Provides precise adjustable voltage regulation with high thermal stability suitable for industrial environments.
• Features an active output circuit that delivers sharp turn-on characteristics for effective low-voltage zener diode replacement.
• Operates at significantly lower voltages compared to standard TL431 devices, enabling compatibility with 3V to 3.3V systems.

Applications

• Isolated feedback circuits in switch-mode power supplies (SMPS)
• Secondary-side regulation in flyback converters
• Adjustable voltage and current references
• Voltage monitoring systems

Procurement Notes

Verify the specific suffix 'CLPR' corresponds to the TO-92-3 through-hole package and commercial/industrial temperature grade (-40°C to +125°C). Confirm RoHS compliance status via the official datasheet before integration. Ensure design margins accommodate the 15 mA maximum cathode current and 1% initial accuracy tolerance for precision applications.

Selection Notes

Select this component when a low-voltage adjustable shunt regulator is required for through-hole PCB designs. It serves as a direct drop-in replacement for legacy TL431 devices in applications where supply voltages are limited to 7 V or less. Consider the 138 PPM/°C temperature coefficient for thermal drift requirements in precision analog circuits.

Part Context

This part belongs to the TLV431A series of low-voltage adjustable shunt regulators. It shares functional similarities with the broader TLV431 family but is distinguished by its specific packaging and electrical ratings optimized for low-power, isolated feedback applications. The device integrates a bandgap reference and error amplifier to maintain stable output voltage under varying load conditions.

Replacement Considerations

The TLV431ACLPR is functionally compatible with other TLV431 variants in TO-92 packages, such as TLV431ACLP. For higher voltage applications exceeding 7 V, the TL431 series may be required instead. Verify pinout compatibility when substituting with generic programmable shunt regulators.