TLV431ALPG

Overview

The TLV431ALPG is a low voltage precision adjustable shunt regulator from onsemi, featuring a programmable output voltage range of 1.24 V to 16 V. It offers a guaranteed reference accuracy of ±1.0% at 25 °C and ±2.0% over the industrial temperature range of −40 °C to 85 °C. The device exhibits a sharp low current turn-on characteristic with a low dynamic impedance of 0.25 Ω over an operating current range of 0.1 mA to 20 mA. It is housed in a TO-92-3 package.

Feature Summary

• Programmable output voltage range spanning 1.24 V to 16 V
• Guaranteed reference accuracy of ±1.0% at 25 °C
• Sharp low current turn-on characteristic for precise regulation
• Low dynamic output impedance across the operating current range

Applications

• Error amplifier for isolated low output voltage switching power supplies
• Adjustable voltage or current linear and switching power supplies
• Voltage monitoring circuits
• Current source and sink applications
• Low voltage zener diode replacements requiring precision references

Procurement Notes

Verify the specific ordering suffix to confirm the package type and shipping configuration, as the TLV431A series includes multiple variants such as LPRA, LPRE, LPRM, and LPRP for TO-92-3 packages. Confirm that the selected part number matches the required lead style (bent or straight) and packaging method (tape & reel, ammo pack, or bulk). Cross-reference the manufacturer's latest documentation to ensure the component status aligns with design requirements, noting that certain legacy suffixes may be discontinued.

Selection Notes

Select the TLV431ALPG when a precision adjustable shunt regulator is required with ±1.0% initial accuracy at room temperature. Ensure the application operates within the recommended cathode current range of 0.1 mA to 20 mA to maintain specified dynamic impedance and regulation performance. Verify that the required output voltage falls within the 1.24 V to 16 V programmable range. Consider thermal management if the junction-to-ambient thermal resistance limits are approached during continuous operation.

Part Context

The TLV431A is part of the broader TLV431, NCV431, and SCV431 family of low voltage precision adjustable shunt regulators manufactured by onsemi. This family provides various accuracy grades, including B series with ±0.5% tolerance and C series with ±0.2% tolerance. The devices are designed to replace zener diodes in circuits demanding higher precision and stability, offering enhanced performance in feedback loops for power supply regulation and analog signal conditioning.

Replacement Considerations

TLV431BLPG