LDK320AM120R

Overview

The LDK320AM120R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a nominal output voltage of 12 V with a maximum output current capability of 200 mA. The device operates within an input voltage range of 2.5 V to 18 V and features a typical dropout voltage of 100 mV at a 100 mA load. Quiescent current is specified as typically 60 μA, rising to a maximum of 100 μA under full load conditions. The component includes logic-controlled electronic shutdown functionality, reducing off-mode consumption to less than 1 μA. It incorporates short-circuit current limiting, thermal protection, and SOA protection mechanisms.

Feature Summary

• Logic-controlled enable pin allows for active operation or deep shutdown mode
• Integrated protections against short circuits, thermal overload, and safe operating area violations
• High power supply rejection ratio (PSRR) performance across varying frequencies
• Stabilized for use with ceramic output capacitors

Applications

• Digital Signal Controllers (DSC)
• Television systems
• Blu-ray and DVD players
• Personal computers and peripherals
• Industrial equipment

Procurement Notes

Verify the specific suffix 'M' and '120R' during procurement to confirm the package type and fixed output voltage configuration. Ensure compatibility with SOT-23-5L surface-mount assembly processes. Confirm that the ordering information matches the required tolerance specifications for the target application design.

Selection Notes

Select this component when a stable 12 V rail is required from inputs up to 18 V in space-constrained designs. The SOT-23-5L package offers a compact footprint suitable for portable electronics. Consider the quiescent current profile if battery life is a critical design parameter. Verify thermal dissipation requirements based on the expected voltage drop and load current.

Part Context

This part belongs to the LDK320 series of ultra-low dropout regulators designed for low-power applications. The series supports various fixed output voltages ranging from 1.2 V to 12 V. The 'A' designation indicates tighter output voltage tolerance compared to standard versions. The device is optimized for stability with small ceramic capacitors, simplifying bill-of-materials and board layout.

Replacement Considerations

Consult official STMicroelectronics documentation for verified cross-reference part numbers before substitution.