LDL212PUR

Overview

The LDL212PUR is a fixed-output linear regulator from the LDL212 series, manufactured by STMicroelectronics. It provides a guaranteed output current of 1.2 A with a typical dropout voltage of 350 mV at full load. The device operates within an input voltage range of 2.5 V to 18 V and features a high power supply rejection ratio (PSRR) of 87 dB at 120 Hz. It includes an enable function for shutdown mode control and integrates internal protections against overcurrent, thermal overload, and undervoltage lockout. The component is housed in a surface-mount SO-8 batwing plastic micropackage.

Feature Summary

• Provides stable 1.2 A output current with low dropout characteristics
• Features high power supply rejection ratio suitable for SMPS regulation
• Includes logic-controlled enable function for reduced consumption
• Integrates comprehensive protection mechanisms including thermal and current limiting

Applications

• Direct regulation in switch-mode power supplies
• Secondary linear regulation in DC-DC converter stages
• Noise-sensitive analog circuit power conditioning

Procurement Notes

Verify that the suffix PUR corresponds specifically to the SO-8 package variant rather than other available options like DFN6. Confirm the fixed output voltage matches system requirements, as the base model supports various voltages. Ensure the ordering code aligns with the manufacturer's current active product status and package specifications.

Selection Notes

Select this component when a robust 1.2 A linear regulator is required for noise-sensitive applications following switching regulators. The high PSRR makes it ideal for cleaning up power rails in mixed-signal systems. Consider the SO-8 package for standard PCB layouts requiring adequate thermal dissipation without additional heatsinking under moderate loads.

Part Context

This part belongs to the LDL212 family of low-dropout linear regulators designed for high-performance power management. The series offers flexibility through various output voltages and packages, catering to diverse industrial and consumer electronics needs while maintaining consistent electrical performance standards across the lineup.

Replacement Considerations

Check for direct substitutes within the LDL212 series offering different output voltages or packages. Verify compatibility with alternative manufacturers' 1.2 A LDOs ensuring similar dropout voltage and PSRR specifications are met for equivalent circuit performance.