L4931CPT50-TR

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

The L4931CPT50-TR is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 5.0 V output with a maximum continuous current of 250 mA. The device operates from an input voltage range up to 20 V and features a typical dropout voltage of 0.4 V at full load. Quiescent current is specified at approximately 600 µA in the active state, reducing to 50 µA in shutdown mode. The unit includes internal thermal overload and short-circuit protection circuits. It requires only a 2.2 µF output capacitor for stability and is housed in a PPAK surface-mount package.

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

• Integrated logic-controlled electronic shutdown function for power management
• Very low dropout voltage enabling efficient operation near input limits
• Internal current limiting and thermal shutdown protection mechanisms

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

• Battery-powered portable electronic devices
• Low-noise local voltage regulation in mixed-signal systems
• Standby mode control in embedded board architectures

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

Verify the specific suffix 'PT' against official STMicroelectronics documentation to confirm the exact package type and tape-and-reel configuration. Ensure compatibility with required PCB footprint dimensions and thermal dissipation requirements for the PPAK housing. Cross-reference the manufacturing date code and RoHS compliance status with current distributor data sheets prior to final procurement decisions.

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

Select this component when a fixed 5 V rail is required with minimal external component count. The PPAK package offers a compact solution for space-constrained designs. Consider the 250 mA current limit and thermal performance under expected ambient conditions. Verify that the input voltage remains within the 20 V maximum rating during all operational transients.

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

This part belongs to the L4931 series of very low drop regulators designed for low-power applications. The series is characterized by high supply voltage rejection and low quiescent current consumption. Variants are available in multiple packages including SO-8, DPAK, and TO-92, with various fixed output voltages such as 3.3 V and 5.0 V.

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

Direct substitutes include other L4931 variants with identical electrical characteristics but different packaging or output voltages, such as L4931CD50-TR (SOIC-8) or L4931ABPT50TR. Verify pinout compatibility and thermal resistance differences before substitution.