L4931CD30

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

The L4931CD30 is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.0V output with a maximum continuous current of 250mA. The device operates from an input voltage range of 2V to 20V and features a typical dropout voltage of 0.4V at full load. Quiescent current is typically 600µA in the ON state and 50µA in shutdown mode. It includes internal overcurrent and thermal protection circuits and requires only a 2.2µF output capacitor for stability. The component is rated for operation between -40°C and +125°C.

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

• Integrated TTL-compatible logic control for electronic shutdown to enable standby modes
• Very low dropout voltage characteristic suitable for battery-powered applications
• Internal current limiting and thermal overload protection mechanisms

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

• Battery-powered portable electronic systems
• Local voltage regulation in microprocessor control units
• Low noise power supply circuits requiring minimal external components

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

Verify the specific suffix 'CD30' confirms the 3.0V fixed output variant, as the L4931 family offers multiple voltage options. Confirm the package type matches design requirements, as this model is available in SO-8, DPAK, and TO-92 configurations. Check RoHS compliance status and ensure the supplier provides valid datasheets matching the exact part number to avoid functional mismatches due to voltage selection differences.

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

Select this component when a fixed 3.0V rail is required with high efficiency under light loads. The low quiescent current makes it superior to standard regulators for battery life extension. Ensure the input voltage remains within the 2V to 20V range. The requirement for only a 2.2µF capacitor simplifies board layout compared to regulators needing larger ceramic or tantalum capacitors for stability.

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

The L4931 series belongs to STMicroelectronics' portfolio of very low drop voltage regulators designed for low power consumption. This specific model integrates inhibit functionality, allowing system-level power management. It is part of a broader family including variants with different output voltages and packages, sharing common protection features and low standby current characteristics.

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

L4931CD33Y: Offers 3.3V output in SOIC-8 package; verify voltage tolerance compatibility.

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

What is the minimum capacitance required for L4931CD30 stability?

The device requires a minimum of 2.2 µF output capacitor for stability.

Does the L4931CD30 support remote shutdown?

Yes, it features a TTL-compatible shutdown logic control function available in SO-8 and PPAK packages.