LDL112D33R

Overview

The LDL112D33R is a fixed-output low-dropout linear regulator from STMicroelectronics, providing a stable 3.3V output with a maximum current capacity of 1.2A. It operates within an input voltage range of 1.6V to 5.5V and features a typical dropout voltage of 300mV at full load. The device incorporates reverse current protection, logic-controlled shutdown consuming less than 1μA, and internal thermal and current limiting protections.

Feature Summary

• Reverse current protection prevents backflow when the input voltage drops below the output level.
• Logic-controlled enable pin allows for electronic shutdown with ultra-low standby current consumption.
• Compatible with small ceramic output capacitors, specifically stabilized by a 1μF unit.

Applications

• Battery-powered portable devices requiring efficient power management
• Low noise analog circuits needing stable 3.3V supply rails
• Embedded systems utilizing ceramic capacitor stabilization

Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-8 package variant during procurement. Confirm that the 3.3V fixed output matches the system requirement. Ensure the input voltage does not exceed the 5.5V absolute maximum rating to prevent device damage.

Selection Notes

Select this component when a 1.2A current capability is required alongside strict quiescent current limits. The inclusion of reverse current protection makes it suitable for systems where input sources may be disconnected or shorted relative to the output.

Part Context

This part belongs to the LDL112 series of low-dropout regulators designed for high efficiency in battery-operated applications. It shares core architectural features with other variants in the family but is distinguished by its fixed 3.3V output and surface-mount packaging.

Replacement Considerations

LDL112PU33R serves as a direct functional substitute within the same product family, offering identical electrical characteristics in a different physical package configuration.