LD1086D2M

Overview

The LD1086D2MTR is a low-dropout positive voltage regulator manufactured by STMicroelectronics, designed to deliver up to 1.5 A of output current. It features an adjustable output voltage range from 1.25 V to 28.5 V and supports a maximum input voltage of 30 V. The device utilizes a D2PAK surface-mount package with three leads plus a tab. Key electrical specifications include a typical dropout voltage of 1.3 V at full load, a maximum of 1.5 V, and a line regulation of 0.014 %/V. It incorporates internal overcurrent and thermal shutdown protection mechanisms.

Feature Summary

• Provides high-efficiency linear regulation with quiescent current flowing into the load rather than being wasted as heat.
• Features on-chip trimming for tight output voltage tolerance within ±1% at 25 °C.
• Includes integrated safety protections against overcurrent conditions and excessive junction temperatures.

Applications

• Battery-powered systems requiring efficient power management
• Post-regulation stages in switching power supplies
• General-purpose linear voltage regulation in consumer electronics

Procurement Notes

Verify the specific suffix (e.g., TR) to confirm tape-and-reel packaging versus cut-tape options. Ensure the D2PAK footprint matches the target PCB design. Confirm RoHS compliance status and check for any recent Package Change Notices (PCN) regarding lead modifications or inner box changes before finalizing procurement orders.

Selection Notes

Select this component when a fixed-output LDO is insufficient due to varying system voltage requirements. The adjustable configuration allows customization via external resistors. Verify that the input-to-output differential voltage remains within the specified dropout limits to maintain regulation. Consider thermal dissipation capabilities based on the ambient temperature and load current.

Part Context

This part belongs to the LD1086 family of low-dropout regulators. It shares pinout compatibility with older standard adjustable regulators but offers improved performance metrics. The D2PAK variant provides a robust surface-mount solution suitable for applications requiring higher current handling compared to smaller SOT packages.

Replacement Considerations

Compatible replacements include other 1.5 A adjustable LDOs in D2PAK packages. Verify pinout alignment and thermal characteristics when substituting. Cross-reference with LD1086 variants such as LD1086DTTR for different packaging options.