LDL212PV33R

Overview

The LDL212PV33R is a fixed-output linear regulator from the LDL212 family, manufactured by STMicroelectronics. It provides a guaranteed output current of 1.2 A with an input voltage range spanning 2.5 V to 18 V and a maximum rating of 20 V. The device delivers a fixed 3.3 V output with typical dropout voltage of 350 mV at full load. Key electrical parameters include a quiescent current of 380 µA maximum, high power supply rejection ratio (PSRR) of 87 dB at 120 Hz, and integrated protections for overcurrent, thermal shutdown, and undervoltage lockout. It operates within a junction temperature range of -40 °C to 125 °C.

Feature Summary

• Provides stable 1.2 A output current across a wide 2.5 V to 18 V input range
• Features high power supply rejection ratio suitable for SMPS and DC-DC post-regulation
• Includes enable logic control function to reduce total current consumption in shutdown mode
• Integrates internal thermal, current limit, and SOA protections for robust operation

Applications

• Direct regulation in Switching Mode Power Supplies (SMPS)
• Secondary linear regulation in DC-DC converters
• Point-of-load applications
• Consumer electronics
• Industrial equipment

Procurement Notes

Verify the specific package variant DFN6 (2x2) matches the design requirements, as the LDL212 series is available in multiple packages including DFN6 (3x3) and SO-8. Confirm that the fixed 3.3 V output aligns with system needs, as adjustable versions exist. Ensure compatibility with the required operating temperature range and check for any recent product change notices regarding the component maturity status.

Selection Notes

Select this component when a high-current LDO with excellent PSRR is required for noise-sensitive loads following switching regulators. The DFN6 (2x2) package offers a compact footprint compared to the SO-8 option. Consider the thermal resistance characteristics of the chosen package if high power dissipation is expected. The enable pin allows for system-level power management integration.

Part Context

This part belongs to the LDL212 family of high PSRR, low-dropout linear regulators. The family supports various fixed output voltages from 1.2 V to 12 V and an adjustable version. Other package options include DFN6 (3x3) and SO-8 batwing plastic micropackage. The LDL212D33R is a similar 3.3 V fixed output device but utilizes the SO-8 package instead of the DFN6 configuration.

Replacement Considerations

LDL212D33R serves as a functional substitute with identical electrical specifications but differs in packaging, utilizing an 8-SOIC format instead of the 6-DFN.