L4931CDT50-TR

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

The L4931CDT50-TR is a positive fixed linear low-dropout regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 5V with a maximum continuous output current of 250mA. The device operates within an input voltage range up to 20V and features a typical dropout voltage of 0.8V at full load. Quiescent current is specified at 1mA, with a maximum supply current of 6mA. Power supply rejection ratio ranges from 70dB at 120Hz to 55dB at 10kHz. It includes internal overcurrent and thermal overload protection and functions reliably across an operating temperature range of -40°C to +125°C.

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

• Provides stable regulated power in battery-powered systems due to very low quiescent current consumption.
• Enables space and cost savings by requiring only a small 2.2 µF capacitor for stability.
• Incorporates internal electronic protection mechanisms against overcurrent conditions and excessive junction temperatures.

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

• Battery-powered portable electronic devices
• Low noise analog circuit power supplies
• Local voltage regulation in embedded systems

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

Verify the specific suffix 'CDT' confirms the DPAK package and 5% tolerance variant. Confirm RoHS3 compliance status for environmental regulations. Ensure the ordering quantity matches the manufacturer's standard reel packaging requirements. Cross-reference the datasheet revision date to validate parameter accuracy against your design specifications.

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

Select this component when a fixed 5V rail is required with moderate current demands up to 250mA. The DPAK package offers efficient thermal dissipation for surface-mount designs. Consider the 2% output voltage tolerance if tighter precision is needed, which may require alternative suffixes. Verify that the input-to-output voltage differential remains sufficient to maintain regulation under all load conditions.

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

This part belongs to the L4931 family of very low drop voltage regulators. The series is designed for applications requiring low power consumption and minimal external components. Variants in the family offer different output voltages and packages, including SO-8 and TO-92. The L4931CDT50-TR specifically utilizes the DPAK surface-mount package for compact board integration.

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

L4931ABDT50-TR: Offers higher accuracy (±1%) but is marked as discontinued. L4931CDT33-TR: Same package and current rating but provides a 3.3V output instead of 5V. L4931CD50-TR: Alternative package option available within the same product line.