L4931CZ33

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

The L4931CZ33 is a fixed-output linear low-dropout regulator manufactured by STMicroelectronics, providing a stable 3.3V output with a maximum continuous current of 250mA. It operates within an input voltage range up to 20V and features a typical dropout voltage of 0.4V at full load. The device incorporates internal overcurrent and thermal shutdown protection mechanisms to ensure operational safety under fault conditions. Designed for through-hole mounting in a TO-92-3 package, it supports an extended industrial temperature range from -40°C to +125°C.

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

• Very low dropout voltage capability enables efficient regulation even when the input-to-output differential is minimal.
• Low quiescent current consumption optimizes power efficiency, making the component suitable for battery-powered applications.
• Integrated electronic shutdown logic allows for system-level power management and standby mode control.

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

• Battery-powered portable electronic devices requiring efficient voltage regulation
• Local voltage regulation in embedded systems with TTL-compatible shutdown requirements
• Low-noise power supply circuits for sensitive analog or digital components

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

Verify the specific suffix designation carefully, as variants such as L4931CZ33-AP may exist with identical electrical characteristics but different packaging configurations. Confirm that the procurement channel provides original manufacturer documentation to validate authenticity. Check for any product change notices regarding manufacturing location or material composition updates.

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

Select this component when a fixed 3.3V rail is required with moderate current demands in a through-hole form factor. Ensure the input voltage remains within the specified maximum limit while accounting for thermal dissipation constraints in the TO-92 package. Verify that the external capacitor value meets the stability requirement of at least 2.2 µF to prevent oscillation during operation.

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

This part belongs to the L4931 family of very low drop voltage regulators designed for low-power applications. The series offers multiple output voltage options and package types, including SO-8 and DPAK, to accommodate diverse design needs. The L4931CZ33 specifically targets cost-sensitive, space-constrained designs utilizing standard through-hole assembly techniques.

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

Direct substitutes include other L4931 family members with compatible pinouts and electrical ratings. Verify that alternative parts maintain the same output voltage tolerance and current handling capabilities. Ensure that any replacement component supports the required shutdown logic interface if system power management depends on this feature.