LDL112PU33R

Overview

The LDL112PU33R is a low-dropout linear regulator from STMicroelectronics, part of the LDL112 series. It provides a fixed 3.3 V output with a maximum current capability of 1.2 A. The device operates within an input voltage range of 1.6 V to 5.5 V and features a typical dropout voltage of 300 mV at full load. It incorporates reverse current protection, logic-controlled electronic shutdown with consumption below 1 μA, and internal thermal and current limiting. The component is stabilized by a 1 μF ceramic capacitor and is available in DFN6 (2x2 mm) packages.

Feature Summary

• Reverse current protection prevents backflow when input voltage drops below output voltage.
• Logic-controlled enable pin allows for deep shutdown mode with ultra-low quiescent current.
• Compatible with small-value ceramic output capacitors for stable operation.
• Integrated thermal and current limit protection safeguards against overload conditions.

Applications

• Low power battery-powered portable devices
• Embedded systems requiring efficient voltage regulation
• Applications necessitating reverse current blocking

Procurement Notes

Verify the specific package variant, as the LDL112 series includes multiple footprint options such as DFN6 (2x2), DFN6 (3x3), SO8, and PPAK. Confirm that the suffix 'PU' corresponds to the required tape-and-reel packaging format and ensure the fixed 3.3 V output aligns with system requirements before procurement.

Selection Notes

Select this component for designs requiring high current density in a compact surface-mount form factor. The low quiescent current and reverse protection make it suitable for battery-operated equipment where efficiency and safety during charging or discharging cycles are critical. Ensure the input voltage remains within the specified 1.6 V to 5.5 V range for optimal performance.

Part Context

This part belongs to the LDL112 family of low-dropout regulators designed for high-current applications. The series offers various output voltages and package types to accommodate diverse design constraints while maintaining consistent electrical characteristics such as low dropout voltage and robust protection features across the product line.

Replacement Considerations

Direct substitutes include other parts from the LDL112 series with different output voltages or packages, such as LDL112PV33R. Cross-reference datasheets to verify pin compatibility and thermal performance if replacing with components from other manufacturers.