L4931CD50-TR

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

The L4931CD50-TR is a positive fixed linear low-dropout voltage regulator manufactured by STMicroelectronics. It provides a stable 5V output with a maximum continuous current of 250mA. The device features a typical dropout voltage of 0.4V at full load and maintains a maximum dropout of 0.8V under specified conditions. It operates within an input voltage range up to 20V and includes internal protections against overcurrent and thermal overload. The component is housed in a DPAK surface-mount package and is designed for operation across an extended temperature range from -40°C to +125°C.

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

• Very low dropout voltage capability suitable for battery-powered systems
• Logic-controlled electronic shutdown function for power management
• Internal current limiting and thermal shutdown protection
• Requires minimal external capacitance for stability

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

• Battery-powered portable electronics
• Low noise power supply circuits
• Local regulation in embedded systems
• Standby mode control applications

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

Verify the specific suffix 'CD50' corresponds to the 5V output variant and 'C' indicates the 2% accuracy grade. Confirm the '-TR' suffix denotes tape-and-reel packaging compatible with automated assembly processes. Ensure the DPAK package matches the target PCB footprint and thermal requirements. Cross-reference the manufacturer part number with official STMicroelectronics documentation to confirm current production status and availability.

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

Select this component when a fixed 5V rail is required with moderate current demands up to 250mA. The DPAK package offers a balance between thermal performance and board space efficiency for surface-mount designs. Consider the 2% output voltage tolerance if tighter regulation is not critical. Verify that the input voltage remains within the 20V maximum limit and that the system can accommodate the required 2.2µF minimum output capacitor for stability.

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

This part belongs to the L4931 family of very low drop regulators, which are optimized for low power consumption and low noise applications. The family includes variants with different output voltages and packages such as SO-8, TO-92, and PPAK. The L4931 series is characterized by its ability to operate with minimal external components, making it a cost-effective solution for space-constrained designs requiring reliable linear regulation.

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

Compatible substitutes include other L4931 variants with matching output voltage and package, such as L4931CDT50-TR or L4931ABDT50-TR. Ensure any replacement maintains the same pinout configuration and electrical characteristics, particularly the dropout voltage and current handling capabilities. Verify that the alternative part supports the required operating temperature range and protection features.