LDL112D18R

Overview

The LDL112D18R is a positive fixed-output low-dropout linear regulator manufactured by STMicroelectronics, belonging to the LDL112 series. It provides a guaranteed output current of 1.2 A with a typical dropout voltage of 300 mV at full load. The device operates within an input voltage range of 1.6 V to 5.5 V and delivers a fixed 1.8 V output. It features a very low quiescent current of 35 μA (typical) at no-load and less than 1 μA in shutdown mode. The component includes reverse current protection, logic-controlled electronic shutdown, and internal thermal and current limit protections. It is designed for stability with ceramic capacitors and is available in surface-mount packages such as DFN6.

Feature Summary

• Reverse current protection prevents backflow from output to input when the input voltage drops below the output voltage.
• Logic-controlled enable pin allows precise management of power states, reducing total current consumption to under 1 μA during shutdown.
• Internal current limiting and thermal protection mechanisms safeguard the device against overload conditions and excessive heat generation.

Applications

• Low-power battery-powered portable electronics
• Embedded systems requiring stable 1.8 V logic supply rails
• Portable devices utilizing ceramic output capacitors

Procurement Notes

Verify the specific package variant and tape-and-reel quantity requirements before ordering. Confirm that the 1.8 V fixed output aligns with the target circuit design. Ensure compatibility with the required input voltage range and load current specifications. Check for any recent product change notices regarding manufacturing or packaging updates.

Selection Notes

Select this component for applications demanding high efficiency with minimal voltage drop across the regulator. The low quiescent current makes it suitable for battery-operated devices where standby power consumption is critical. Verify that the system can accommodate the necessary ceramic output capacitance for stability. Consider the thermal performance based on the expected ambient temperature and load current.

Part Context

This part belongs to the LDL112 family of low-dropout regulators known for their robust protection features and low static current. The series offers various output voltages and package options to suit different power management needs in compact electronic designs.

Replacement Considerations

Direct substitutes include other parts from the LDL112 series with compatible output voltages and currents, such as the LDL112PV18R. Verify pinout compatibility and electrical parameters before swapping components.