LDK320AM36R

Overview

The LDK320AM36R is a fixed-output low-dropout voltage regulator manufactured by STMicroelectronics, providing a nominal output of 3.6 V with a maximum load current of 200 mA. It operates from an input voltage range of 2.5 V to 18 V and features a typical dropout voltage of 100 mV at 100 mA. The device includes logic-controlled electronic shutdown, reducing quiescent current to below 1 μA in off mode. It offers high power supply rejection ratio (PSRR) and low noise characteristics. Protection mechanisms include short-circuit current limiting, thermal shutdown, and safe operating area (SOA) protection. The component is available in SOT-23-5L and SOT-89 packages.

Feature Summary

• Logic-controlled electronic shutdown for ultra-low power consumption
• High accuracy output voltage tolerance
• Compatible with ceramic output capacitors
• Integrated short-circuit, thermal, and SOA protections

Applications

• Digital signal controllers
• Television systems
• Blu-ray and DVD players
• Personal computers
• Industrial equipment

Procurement Notes

Verify the specific ordering suffix AM36R confirms the 3.6 V fixed output voltage and A-grade accuracy. Confirm package availability matches design requirements, as the ADJ pin and enable functions are not supported in the SOT-89 variant. Ensure environmental compliance grades align with project specifications before finalizing procurement.

Selection Notes

Select this regulator for applications requiring stable 3.6 V rails with minimal voltage drop under varying loads. The high PSRR makes it suitable for noise-sensitive circuits. Consider the SOT-23-5L package if adjustable voltage or enable control is needed, as these features are unavailable in the SOT-89 configuration. Verify thermal performance based on expected power dissipation.

Part Context

The LDK320 series comprises low-dropout linear regulators designed for battery-powered devices due to their low quiescent current and wide input voltage range. The LDK320A variant specifically denotes higher output voltage accuracy compared to standard versions. This family supports both fixed and adjustable output configurations, catering to diverse power management needs in consumer electronics and industrial sectors.

Replacement Considerations

Direct replacements within the same family include other LDK320 variants with different output voltages or accuracy grades. Cross-referencing pinouts is essential when substituting packages, particularly noting that the SOT-89 lacks the enable and adjust pins present in the SOT-23-5L version.