LD2980ABM36TR

Overview

The LD2980ABM36TR is a positive low-dropout linear voltage regulator manufactured by STMicroelectronics, providing a fixed 3.6V output with a maximum continuous current of 50mA. It operates within an input voltage range of 2.5V to 16V and features an ultra-low quiescent current of 80µA in active mode, reducing to less than 1µA when the inhibit pin is pulled low. The device incorporates internal thermal overload protection and short-circuit current limiting for robust operation. Designed for stability with low equivalent series resistance (ESR) ceramic capacitors, it delivers low noise performance suitable for sensitive analog circuits.

Feature Summary

• Ultra-low dropout voltage characteristics ensure efficient regulation even with minimal input-to-output voltage differentials.
• Logic-controlled electronic shutdown function allows precise power management via the inhibit pin.
• Guaranteed stability with low ESR ceramic output capacitors eliminates the need for specialized components.
• Integrated thermal and current limiting protections safeguard the device under fault conditions.

Applications

• Battery-powered instrumentation systems requiring extended operational life
• Industrial control boards needing stable local voltage regulation
• Audio systems demanding low-noise power supply rails
• Switched-mode power supply (SMPS) post-regulation stages

Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel configuration. Confirm that the selected variant aligns with the intended output voltage tolerance requirements. Ensure compatibility with the target PCB assembly process regarding the SOT-23-5L surface-mount package dimensions. Cross-reference the datasheet revision date to confirm availability of the latest electrical specifications and application guidelines.

Selection Notes

Select this component when designing for applications where low quiescent current and high efficiency are critical. It is suitable for replacing older linear regulators like the 78xx series without requiring board layout modifications if the footprint is compatible. Consider its 50mA current limit when sizing for load requirements. The device is ideal for noise-sensitive environments due to its low RMS output voltage noise specification.

Part Context

This part belongs to the LD2980 family of ultra-low drop voltage regulators designed for low-power and low-noise applications. The 'A' suffix typically denotes tighter output voltage tolerance compared to standard versions. The 'BM' indicates the SOT-23-5L surface-mount package, while 'TR' specifies the tape-and-reel packaging format for automated assembly processes.

Replacement Considerations

Public confirmed substitute part numbers: LD2980ABM30TR, LD2980ABM33TR, LD2980ABM50TR.