L4931CV33

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

The L4931CV33 is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum continuous current of 250 mA. The device supports an input voltage range from 4 V to 20 V and operates within a temperature range of -40 °C to +125 °C. Key electrical characteristics include a typical dropout voltage of 400 mV at full load, line regulation of 18 mV, and load regulation of 18 mV. The quiescent current is typically 600 µA in the ON state. It features internal overcurrent and thermal shutdown protection.

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 operation
• Internal current limiting and thermal overload protection
• Requires only a small output capacitor for stability

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

• Battery-powered portable systems requiring low quiescent current
• Local voltage regulation in embedded circuits
• Low noise power supply applications
• Standby mode control in battery-operated devices

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

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm RoHS compliance status and check for obsolescence notices, as availability may be limited. Ensure proper handling procedures are followed during storage and installation to maintain device integrity.

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

Select this component when a fixed 3.3 V output is required with moderate current demands up to 250 mA. Consider the TO-220 package for better thermal dissipation in higher ambient temperatures. Evaluate the input voltage range to ensure sufficient headroom for the specified dropout voltage under all operating conditions.

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 and low noise applications. The series offers various output voltages and packages including SO-8, DPAK, TO-92, and TO-220. The L4931CV33 specifically utilizes the TO-220 package for robust performance in through-hole mounting scenarios.

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

Compatible substitutes within the same family include L4931CD33Y and L4931CD33-TR. These alternatives offer identical electrical specifications but differ in packaging type, utilizing SOIC-8 instead of TO-220. Verify pin compatibility and thermal requirements before substitution.