L4931CPT50

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

The L4931CPT50 is a very low dropout voltage regulator manufactured by STMicroelectronics, providing a fixed 5.0V output with a maximum current of 250 mA. It operates within an input voltage range up to 20 V and features a typical dropout voltage of 0.4 V. The device maintains stability with only a 2.2 µF output capacitor. Quiescent current is typically 600 µA in ON mode and 50 µA in OFF mode. It includes internal current and thermal limiting protections and supports operation 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
• Logic-controlled electronic shutdown function for standby mode
• Internal current and thermal limit protections
• Requires minimal external capacitance for stability

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

• Battery-powered systems requiring low quiescent current
• Local regulators in portable electronics
• Low noise power supply applications
• Systems requiring board-level standby modes

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

Verify the specific suffix 'PT' confirms the TO-92 package and tape-and-reel packaging configuration as indicated by distributor listings. Confirm the 'C' grade indicates the standard 2% output voltage tolerance at 25 °C. Ensure compatibility with required PCB footprint dimensions for the three-pin through-hole installation. Check for RoHS compliance status in the latest manufacturer documentation.

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

Select this component when a fixed 5V output is required with high efficiency under light load conditions due to low quiescent current. The TO-92 package is suitable for cost-sensitive or space-constrained through-hole designs. Consider the 250 mA output limit for load requirements. The logic shutdown feature is advantageous for systems needing active power management control via TTL-compatible signals.

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

The L4931 series comprises very low drop regulators available in multiple packages including SO-8, DPAK, PPAK, and TO-92. The CPT50 variant specifically denotes the TO-92 package with a 5.0V output. This family is designed for low power applications, offering both positive polarity regulation and electronic shutdown capabilities to reduce total system power consumption in battery-operated devices.

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

Publicly confirmed substitute part numbers are not available in the provided source material.