L4931CD50

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

The L4931CD50 is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 5 V output with a maximum continuous current of 250 mA. The device operates within an input voltage range up to 20 V and maintains regulation with a typical dropout voltage of 400 mV at full load, reaching a maximum of 800 mV. Quiescent current consumption is specified at 600 µA in the active state. The unit features a 2% voltage accuracy tolerance at 25 °C and includes internal protections against overcurrent and thermal overload. It is housed in an SOIC-8 surface-mount package and supports 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 for efficient power management in battery-powered systems
• Logic-controlled electronic shutdown function for standby mode power reduction
• Requires only a small 2.2 µF output capacitor for stability, minimizing board space
• Integrated thermal and current limiting protection for robust operation

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 shutdown control
• Low noise power supply circuits for sensitive analog components

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

Verify component authenticity through authorized distributors or direct manufacturer channels due to discontinued status. Confirm RoHS compliance and specific packaging variants (tube vs. reel) as availability varies. Cross-reference datasheet revision dates to ensure compatibility with design specifications. Request lot traceability documentation for quality assurance purposes prior to final procurement commitment.

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

Select this component when a fixed 5 V output is required with minimal external capacitance. Ensure input voltage does not exceed 20 V and thermal dissipation capabilities match the application's power budget. Consider the SOIC-8 package constraints for PCB layout. Verify that the 250 mA current rating suffices for peak loads without triggering internal protection mechanisms.

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

The L4931CD50 belongs to the L4931 series of very low drop regulators designed for low-power applications. This series offers multiple output voltages and packages, including SO-8, DPAK, and TO-92. The CD50 variant specifically denotes the 5 V fixed output in the SOIC-8 package with C-grade accuracy. The series emphasizes low static current and compact design requirements for modern portable electronics.

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

Check for L4931CD50-TR if tape-and-reel packaging is preferred over tubes. Verify functional equivalents within the same L4931 family for different output voltages or packages. No direct cross-manufacturer substitutes are confirmed in public documentation; consult official replacement guides for validated alternatives.