L4931ABPT33

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The L4931ABPT33 is a low-dropout linear voltage regulator manufactured by STMicroelectronics, providing a fixed positive output of 3.3 V with a maximum continuous load current of 250 mA. It operates within an input voltage range up to 20 V and features a typical dropout voltage of 0.4 V at full load. The device incorporates internal current limiting and thermal shutdown protection mechanisms to ensure operational safety under fault conditions. Designed for surface-mount applications, it utilizes the PPAK package configuration.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Features logic-controlled electronic shutdown functionality compatible with TTL standards for power management
• Maintains stability using only a 2.2 µF output capacitor to minimize board space requirements
• Includes integrated overcurrent and thermal overload protection circuits

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Battery-powered portable electronic systems requiring low quiescent current
• Local voltage regulation in embedded circuit boards
• Standby mode control sections in microprocessor-based designs

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify component authenticity through authorized distribution channels due to potential availability constraints. Confirm package integrity upon receipt as the PPAK form factor requires specific handling protocols. Cross-reference datasheet revisions to ensure compatibility with existing design specifications before finalizing procurement orders.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a compact surface-mount solution is required for stable 3.3 V generation. The PPAK package offers thermal advantages over standard SOIC variants while maintaining low profile dimensions. Ensure input voltage remains within specified limits to prevent excessive power dissipation during high-load operations.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the L4931 series of very low drop regulators designed for efficiency in battery-operated devices. The AB suffix indicates a tighter voltage accuracy tolerance compared to standard C-grade versions. The PT designation specifies the tape-and-reel packaging format suitable for automated assembly processes.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include other L4931 series variants such as L4931CD33 or L4931ABDT33, provided pin compatibility and package type align with the existing footprint. Verify that alternative packages support the same thermal performance characteristics.