L4931CDT120

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

The L4931CDT120 is a fixed-output linear low-dropout regulator manufactured by STMicroelectronics. It provides a stable 12V output with a maximum current capacity of 250mA. The device supports an input voltage range up to 20V and maintains a maximum dropout voltage of 0.8V at full load. Key electrical specifications include a typical quiescent current of 1.6mA and a maximum supply current of 7mA. Power supply rejection ratios are specified as 64dB at 120Hz and 55dB at 10kHz. The component operates within a temperature range of -40°C to +125°C and is housed in a DPAK surface-mount package.

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

• Integrated overcurrent and thermal shutdown protection mechanisms for enhanced operational safety
• Logic-controlled electronic shutdown capability available in specific package variants
• Requires minimal external capacitance, typically 2.2 µF, for circuit stability

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

• Battery-powered systems requiring efficient power management
• Low noise analog circuit power supplies
• Local regulation in embedded board architectures

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

Verify the exact suffix configuration against official datasheets to ensure correct output voltage and package type. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration. Check for obsolescence notices or lifecycle changes directly from the manufacturer before finalizing procurement plans.

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

Select this component when a fixed 12V rail is required with moderate current demands. Ensure the input voltage does not exceed the 20V absolute maximum rating. Consider thermal dissipation capabilities based on the DPAK package and expected ambient operating temperatures during design validation.

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

This part belongs to the L4931 family of very low drop voltage regulators. The series offers various output voltages and packages including SO-8, DPAK, and TO-92. The 'C' designation indicates a 2% output voltage accuracy tolerance at 25°C, distinguishing it from the higher precision 'AB' variant.

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

L4931CD120-TR is a documented alternative in the same family.