L4931ABD15-TR

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

The L4931ABD15-TR is a fixed positive low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 1.5 V output with a maximum continuous current of 250 mA. The device features a typical dropout voltage of 0.4 V and includes internal overcurrent and thermal shutdown protection circuits. It operates within an input voltage range up to 20 V and maintains stability with only a 2.2 µF output capacitor. The component is housed in a DPAK surface-mount package and supports an operating junction temperature range from -40 °C to +125 °C.

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

• Very low dropout voltage characteristic enabling efficient operation in battery-powered systems
• Logic-controlled electronic shutdown function for power management and standby mode reduction
• Integrated overcurrent and thermal limit protection mechanisms for enhanced reliability

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

• Battery-powered portable electronic devices requiring low quiescent current
• Local voltage regulation in embedded systems with TTL-compatible control interfaces
• Low noise power supply stages for sensitive analog or RF circuitry

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

Verify the specific suffix ABD15 against the official STMicroelectronics datasheet to confirm the 1.5 V fixed output voltage and DPAK package configuration. Ensure compatibility with the required 2.2 µF minimum output capacitance for stability. Confirm that the procurement source provides genuine components with traceable manufacturing dates, as availability may vary across distributors.

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

Select this regulator when a precise 1.5 V output is required with minimal voltage drop under load. The DPAK package offers a balance of thermal performance and space efficiency for surface-mount designs. Consider the 250 mA current limit and the necessity for external shutdown logic if system power management requires active control of the regulator state.

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 demanding low power consumption and high efficiency. Variants within the family differ primarily in output voltage options and available package types, such as SO-8, TO-92, and PPAK, while sharing core electrical characteristics and protection features.

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

Direct substitutes include other L4931 variants with different fixed output voltages (e.g., L4931ABD33-TR for 3.3 V) if the voltage requirement changes. Cross-family replacements require matching the 250 mA output current, DPAK footprint, and thermal specifications.