L4931CD25

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

The L4931CD25 is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 2.5V output with a maximum load current of 250 mA. The device operates within an input voltage range up to 20 V and maintains regulation across a temperature range of -40°C to +125°C. Key electrical specifications include a typical dropout voltage of 400 mV, a quiescent current of 600 µA in active mode, and a line/load regulation of 18 mV. The unit is housed in an 8-SOIC surface-mount package.

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

• Features logic-controlled electronic shutdown for power management
• Requires only a 2.2 µF capacitor for stability
• Includes internal current and thermal limiting protection

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

• Battery-powered systems requiring low power consumption
• Local voltage regulation in portable electronics
• Low noise power supply circuits

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

Verify component authenticity through authorized distributors as the part status is listed as obsolete. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for any historical parameter updates. Ensure storage conditions meet semiconductor handling standards to prevent degradation before installation.

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

Select this component when a fixed 2.5V rail is required with minimal external capacitance. Consider the SO-8 package for space-constrained PCB layouts. Evaluate thermal dissipation requirements based on input-output differential and load current. Verify compatibility with TTL-compatible shutdown signals if system standby functionality is needed.

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

This regulator belongs to the L4931 family of very low drop voltage regulators from STMicroelectronics. The series offers various fixed output voltages including 3.3V and 5V variants. The CD suffix indicates a specific accuracy grade and operating temperature range suitable for industrial applications.

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

Direct substitutes may include other L4931 variants such as L4931CD33 or L4931CD50 for different voltage rails. Cross-reference pinouts and thermal characteristics before substitution.