L4931CZ80

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

The L4931CZ80 is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 8V output with a maximum continuous current of 250mA. The device operates within an input voltage range up to 20V and features a typical dropout voltage of 0.4V at full load. It incorporates internal current limiting and thermal shutdown protection for robust operation. The component is housed in a TO-92-3 package, suitable for through-hole mounting, and functions reliably across an extended temperature range from -40°C to +125°C.

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

• Very low dropout voltage capability ensures efficient power regulation even with minimal input-to-output differential.
• Integrated electronic shutdown logic allows for system standby modes to reduce total power consumption.
• Built-in overcurrent and thermal protection safeguards the device under fault conditions.

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

• Battery-powered portable electronics requiring low quiescent current
• Low-noise power supply stages for sensitive analog circuits
• Local voltage regulation in embedded systems

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

Verify the specific suffix 'CZ80' against official STMicroelectronics documentation to confirm the 8V fixed output variant. Check for obsolescence notices or product change notifications as availability may be limited. Ensure the TO-92-3 package matches your PCB footprint requirements before finalizing procurement decisions.

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

Select this component when a fixed 8V rail is required with high efficiency near the dropout region. Consider the TO-92-3 package constraints for thermal dissipation at higher loads. Verify that the 250mA output current meets the downstream circuit demands without exceeding the device's thermal limits.

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

The L4931 series comprises very low drop regulators designed for low-power applications. This specific part belongs to the family offering TTL-compatible shutdown control in select packages. The series supports various output voltages and packages including SO-8, DPAK, and TO-92, targeting cost-sensitive and space-constrained designs.

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

Consult official substitution guides for equivalent LDOs with matching 8V output and 250mA current ratings. Verify pin compatibility if replacing in existing designs, particularly regarding the shutdown function availability in the TO-92 package.

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

Does the L4931CZ80 support external shutdown control?

Yes, the L4931 series includes a TTL-compatible shutdown logic control function, allowing the device to be placed in standby mode to reduce power consumption.

What is the minimum capacitance required for stability?

The device requires only a 2.2 µF capacitor for stability, which helps save space and cost in the design.