L4931CZ120

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

The L4931CZ120 is a positive fixed linear voltage regulator from STMicroelectronics, delivering a stable 12V output with a maximum current of 250mA. It operates within an input voltage range up to 20V and features a typical dropout voltage of 0.8V at full load. The device incorporates internal current limiting and thermal shutdown protection for robust operation. It maintains functionality across an extended temperature range from -40°C to +125°C. The component utilizes a TO-92-3 package, suitable for through-hole mounting in compact power management designs.

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

• Integrated electronic shutdown logic controlled by TTL-compatible signals to reduce standby power consumption
• Requires only a 2.2 µF output capacitor for stability, minimizing external component count and board space
• Includes internal current limiting and thermal overload protection mechanisms

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

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

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

Verify the specific suffix designation carefully, as variations such as L4931CZ120-AP may exist. Confirm package type accuracy between TO-92 and TO-220 variants before ordering. Check manufacturer lifecycle status, as some versions are marked as obsolete or end-of-life. Ensure compatibility with existing PCB footprints for the selected package style.

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

Select this component when a fixed 12V output is required with moderate current demands up to 250mA. Consider the TO-92 package for cost-sensitive through-hole applications. Evaluate the low quiescent current specifications if battery life is a critical design constraint. Verify that the input voltage does not exceed the 20V maximum rating 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 voltage regulators designed for low power applications. The series offers various output voltages and packages including SO-8, DPAK, and TO-92. The L4931CZ120 specifically provides a 12V output in a TO-92 configuration, targeting embedded control and portable equipment markets.

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

L4931CZ120-AP is a documented variant with identical electrical characteristics but potentially different packaging or handling specifications.