L4931ABPT33-TR

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

The L4931ABPT33-TR is a positive fixed linear low-dropout voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 3.3V with a maximum continuous output current of 250mA. The device supports an input voltage range up to 20V and operates within a junction temperature range of -40°C to +125°C. It features internal current limiting and thermal shutdown protection. The component is housed in a PPAK surface-mount package and requires only a 2.2µF output capacitor for stability.

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

• Provides stable 3.3V regulated output with high accuracy
• Includes integrated overcurrent and thermal overload protection
• Enables logic-controlled electronic shutdown for power management
• Requires minimal external capacitance for circuit stability

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

• Battery-powered portable electronic devices
• Low noise analog circuit power supplies
• Local voltage regulation in embedded systems
• Standby mode control for board sections

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

Verify the specific suffix 'AB' indicates the ±1% output voltage tolerance selection at 25°C, distinct from standard variants. Confirm the 'P' designation corresponds to the PPAK package type required for your PCB layout. Ensure the '-TR' suffix matches the reel packaging format needed for your assembly line equipment. Cross-reference the manufacturer datasheet for the latest pinout and thermal characteristics before finalizing procurement.

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

Select this variant when precise 3.3V regulation with tight tolerance is required compared to standard versions. The PPAK package offers a compact footprint suitable for space-constrained designs. Consider the 250mA current limit against peak load demands. Verify that the input voltage remains within the 20V maximum rating under all operating conditions to ensure reliability.

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

This component belongs to the L4931 family of very low drop voltage regulators designed for low power applications. The family includes various packages such as SO-8, DPAK, TO-92, and PPAK, along with multiple fixed output voltages. The AB series specifically denotes higher precision output voltage options available within this product line.

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

L4931CDT33-TR: Offers similar functionality but with ±2% tolerance and DPAK package. L4931ABDT33-TR: Identical electrical performance but utilizes the DPAK package instead of PPAK.