L4931ABPT25

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

The L4931ABPT25 is a very low dropout linear voltage regulator manufactured by STMicroelectronics, providing a fixed 2.5 V output with ±1% accuracy at 25 °C. It delivers an output current up to 250 mA while maintaining a typical dropout voltage of 0.4 V. The device operates within a supply voltage range supporting the 2.5 V output and features a quiescent current of approximately 600 µA in ON mode and 50 µA in OFF mode. It includes TTL-compatible shutdown logic control, internal current limiting, and thermal protection. Stability requires only a 2.2 µF capacitor. The component is housed in a PPAK package and functions across a temperature range from -40 °C to +125 °C.

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

• Very low dropout voltage enabling efficient operation in battery-powered systems
• TTL-compatible electronic shutdown for power management and standby modes
• High supply voltage rejection ratio for noise reduction
• Internal overcurrent and thermal limit protections

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

• Battery-powered portable devices
• Low noise analog circuit regulation
• Local regulator standby control in embedded systems
• Space-constrained low power designs

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

Verify the specific suffix ABPT25 against the manufacturer's official datasheet to confirm the 2.5 V output voltage, ±1% tolerance, and PPAK package type. Ensure compatibility with required thermal dissipation and input voltage ranges for the target application. Cross-reference ordering codes with STMicroelectronics documentation to avoid confusion with other output voltages or packages in the L4931 family.

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

Select this component when a fixed 2.5 V output with high precision is required alongside minimal external component count. The PPAK package suits applications needing compact footprints with integrated shutdown functionality. Consider the 250 mA current limit and 0.4 V dropout characteristics relative to the input supply voltage and load requirements.

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

The L4931 series comprises very low dropout regulators designed for low power consumption. Variants offer different fixed output voltages including 3.3 V, 3.5 V, and 5 V. The AB suffix denotes ±1% output voltage accuracy, while PT25 indicates the specific 2.5 V version in PPAK packaging. The series emphasizes low quiescent current and stability with small capacitors.

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

Direct substitutes within the same family include L4931ABPT33 (3.3 V) or L4931ABPT50 (5.0 V) if voltage levels differ. Verify pinout compatibility and package dimensions before substituting with other manufacturers' low dropout regulators offering similar current and dropout specifications.