L4931ABZ25-AP

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

The L4931ABZ25-AP is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 2.5 V output with a maximum load current of 250 mA. The device features a typical dropout voltage of 0.4 V and operates within an input voltage range up to 20 V. Quiescent current is typically 600 µA in the ON state and 50 µA in the OFF state. It offers high power supply rejection, rated at 75 dB at 120 Hz and 55 dB at 10 kHz. The unit is housed in a TO-226-3 (TO-92) package and supports an operating temperature range from -40 °C to +125 °C.

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

• Very low dropout voltage capability for efficient battery-powered operation
• Logic-controlled electronic shutdown function for standby mode management
• Integrated internal current limiting and thermal protection mechanisms

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

• Battery-powered portable electronic systems
• Low noise analog circuit power supplies
• Local regulation in microprocessor-based boards

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

Verify the specific suffix 'AB' indicates the ±1% output voltage accuracy selection at 25 °C, distinct from the standard 'C' variant. Confirm the TO-226-3 package designation matches the required through-hole mounting constraints. Check official documentation for any obsolescence notices, as this part number may be marked obsolete in some distributor catalogs. Ensure the application design accounts for the thermal dissipation limits inherent to the TO-92 package structure under maximum load conditions.

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

Select this component when a precise 2.5 V rail is required with tight tolerance specifications. The AB suffix ensures higher accuracy compared to standard variants. Consider the low quiescent current benefit for extending battery life in portable devices. Evaluate the thermal performance in the TO-92 package if high ambient temperatures or continuous full-load currents are expected in the target application environment.

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

This component belongs to the L4931 series of very low drop voltage regulators with inhibit functionality. The series is designed for applications requiring low power consumption and minimal external component count. Other variants in the family offer different fixed output voltages such as 3.3 V, 3.5 V, and 5 V, available in various packages including SO-8, DPAK, and PPAK.

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

Publicly confirmed substitute part numbers are not available in the provided source data.