LDK320AM33R

Overview

The LDK320AM33R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics, providing a nominal output of 3.3 V with a maximum load current of 200 mA. It operates within an input voltage range of 2.5 V to 18 V and features high accuracy with a typical quiescent current of 60 μA. The device includes logic-controlled electronic shutdown, reducing off-mode consumption to less than 1 μA. It incorporates comprehensive protection mechanisms including short-circuit current limiting, thermal shutdown, and safe operating area (SOA) protection.

Feature Summary

• Logic-controlled enable pin for active operation or ultra-low power shutdown mode
• High power supply rejection ratio ensuring stable performance against input noise
• Integrated short-circuit, thermal, and SOA protections for robust operation
• Compatible with small ceramic output capacitors for compact design

Applications

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

Procurement Notes

Verify the specific suffix 'M' indicates the ±0.5% output voltage tolerance variant as documented in official specifications. Confirm package type matches SOT-23-5L requirements. Ensure environmental compliance standards align with project constraints. Cross-reference datasheet revision dates for latest electrical characteristics. Validate ordering information directly with manufacturer documentation.

Selection Notes

Select this component when precise voltage regulation is required with minimal quiescent current consumption. The wide input voltage range supports various battery-powered applications. High PSRR makes it suitable for noise-sensitive circuits. Verify that the fixed 3.3 V output meets system requirements without external adjustment components.

Part Context

This part belongs to the LDK320 series of low-dropout regulators designed for low-power applications. The series offers various fixed output voltages and adjustable versions. The 'A' designation typically denotes tighter output voltage tolerance compared to standard variants. The device is optimized for stability with ceramic capacitors, simplifying board layout.

Replacement Considerations

Consult official STMicroelectronics documentation for verified substitute part numbers. Ensure replacement devices match input/output voltage ranges, current capabilities, and package dimensions. Verify compatibility with existing PCB footprints and thermal management requirements before implementation.