LDL212PU50R

Overview

The LDL212PU50R is a fixed-output linear voltage regulator from the LDL212 series, manufactured by STMicroelectronics. It provides a guaranteed output current of 1.2 A with an output voltage of 5.0 V. The device operates within an input voltage range of 2.5 V to 18 V and features a typical dropout voltage of 350 mV at full load. It includes high power supply rejection ratio (PSRR) capabilities, an enable function for shutdown mode control, and internal protections against thermal overload, current limiting, and safe operating area violations. The component is housed in a surface-mount DFN6 package.

Feature Summary

• Provides stable 1.2 A output current with low dropout characteristics
• Features high PSRR suitable for direct regulation in SMPS applications
• Includes logic-controlled enable function for reduced standby consumption
• Integrates comprehensive protection mechanisms including thermal and current limits

Applications

• Secondary linear regulation in DC-DC converter systems
• Direct regulation in switch-mode power supply (SMPS) architectures
• Powering sensitive loads in consumer electronics such as TVs and set-top boxes
• Post-regulation stages in industrial control modules

Procurement Notes

Verify that the specific suffix 'PU50R' corresponds to the 5.0 V fixed output variant within the DFN6 package configuration. Confirm the manufacturer is STMicroelectronics and check for RoHS compliance status. Ensure the ordering code matches the exact pinout and thermal pad requirements for your PCB layout design before finalizing procurement.

Selection Notes

Select this component when a fixed 5.0 V rail is required with up to 1.2 A load capability. It is appropriate for designs needing high noise rejection in noisy environments or where space savings via DFN packaging are prioritized over through-hole alternatives. Consider the 18 V maximum input rating for compatibility with battery-operated equipment or medium voltage rails.

Part Context

This part belongs to the LDL212 family of low-dropout linear regulators designed for cost-effective and compact power solutions. The series offers various fixed output voltages and adjustable versions to support diverse application needs. These regulators are engineered to provide optimal combinations of low quiescent current and dynamic performance, fitting into ST's broader portfolio of analog power management devices.

Replacement Considerations

Compatible substitutes include other parts from the LDL212 series with different output voltages or packages, such as LDL212PV33R for a 3.3 V output. Cross-reference with similar 1.2 A LDOs from STMicroelectronics offering comparable input ranges and thermal protection features.