L4931ABDT33-TR

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

The L4931ABDT33-TR is a positive fixed linear low-dropout regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 3.3V with a maximum output current of 250mA. The device supports an input voltage range up to 20V and features a typical dropout voltage of 0.8V at full load. It operates within a temperature range of -40°C to +125°C and includes internal overcurrent and thermal shutdown protection. The component is housed in a DPAK surface-mount package.

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

• Provides stable 3.3V regulation with high accuracy using AB grade selection
• Integrates electronic protection against overload and excessive heat
• Designed for efficient power management in compact surface-mount layouts

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

• Battery-powered portable electronics requiring low quiescent current
• Local voltage regulation for microcontroller logic supplies
• Noise-sensitive analog circuit power conditioning

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

Verify the specific suffix DT33 corresponds to the DPAK package and 3.3V output configuration. Confirm RoHS3 compliance status for environmental regulations. Ensure the AB grade designation matches required voltage tolerance specifications for the target application design.

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

Select this component when a fixed 3.3V rail is needed with moderate current capability. The DPAK package offers thermal performance advantages over smaller footprints. Verify that the input voltage remains within the 20V limit and that the system requires positive polarity regulation.

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

This part belongs to the L4931 family of very low drop voltage regulators from STMicroelectronics. The series is characterized by low quiescent current and minimal external component requirements. The AB variant indicates tighter output voltage tolerance compared to standard C grade versions.

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

L4931CDT33-TR serves as a functional substitute within the same family, offering identical electrical characteristics but with potentially different voltage tolerance grades.