L4931CDT33

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

The L4931CDT33 is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3V output with a maximum continuous current of 250mA. The device supports an input voltage range from 2V to 20V, ensuring reliable operation across various supply conditions. It features a very low dropout voltage of approximately 0.4V at full load and maintains a typical quiescent current of 600µA in the active state. The component includes internal protection mechanisms against overcurrent and thermal overload, operating reliably within a temperature range of -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 reducing total power consumption in standby modes
• Integrated overcurrent and thermal limit protections to ensure device safety under fault conditions

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 control interfaces
• Low noise power supply circuits for sensitive analog or digital components

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

Verify the specific package variant, as the base model number may correspond to different tape-and-reel configurations such as DPAK. Confirm RoHS compliance status and check for end-of-life notices, as availability varies by distributor. Ensure the selected suffix matches the required packaging format for automated assembly processes.

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

Select this regulator when a fixed 3.3V output is required with minimal voltage drop across the input-output differential. Consider the 250mA current limit for load requirements and verify that the input voltage remains within the specified 2V to 20V range. Evaluate the need for the shutdown pin if system-level power management is critical for extending battery life.

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

This component belongs to the L4931 series of very low drop regulators designed for low power applications. The series offers multiple output voltages and packages, including SO-8, DPAK, and TO-92. The 'C' designation indicates a 2% output voltage accuracy at 25°C, distinguishing it from higher precision variants. It is categorized under PMIC linear regulators for general-purpose power management.

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

L4931CDT33-TR: Identical electrical specifications with explicit tape-and-reel packaging designation.