L4931CD120

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

The L4931CD120 is a fixed positive low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 12 V output with a maximum continuous current of 250 mA. The device supports an input voltage range up to 20 V and operates within an ambient temperature range of -40 °C to +125 °C. Key electrical specifications include a typical dropout voltage of 0.4 V at full load, a maximum dropout of 0.8 V, and a quiescent current of approximately 1.6 mA. Supply rejection ratios are rated at 64 dB at 120 Hz and 55 dB at 10 kHz. The unit is housed in an 8-SOIC surface-mount package.

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

• Integrated electronic shutdown logic control for standby mode operation
• Built-in internal current limiting and thermal overload protection
• Requires only a 2.2 µF output capacitor for stability

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

• Battery-powered systems requiring low power consumption
• Local regulation in portable electronic devices
• Low noise power supply circuits

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

Verify the specific suffix against official documentation, as variations may indicate different packaging or tolerance grades. Confirm RoHS compliance status and moisture sensitivity level prior to integration. Check for obsolescence notices or lifecycle changes directly from the manufacturer. Ensure the selected package matches the intended PCB footprint and thermal requirements.

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

Select this component when a fixed 12 V rail is required with minimal external components. The SO-8 package suits space-constrained designs. Verify that the input voltage never exceeds the 20 V absolute maximum rating. Consider the thermal dissipation capabilities of the SO-8 package under high load conditions. Ensure the application does not require adjustable output voltages.

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 noise and low power applications. The series offers various output voltages and packages including SO-8, DPAK, and TO-92. The 'CD' designation typically indicates a 2% output voltage accuracy grade and specific packaging configuration within the family.

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

L4931ABD120TR is a documented substitute offering similar functionality with potentially tighter voltage accuracy tolerances.