LDK130C12R

Overview

The LDK130C12R is a fixed-output low dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a positive output voltage of 1.2V with a maximum output current of 0.3A. The device operates within an input voltage range of 1.9V to 5.5V and features a typical dropout voltage of 0.4V at full load. It includes logic-controlled shutdown functionality, reducing quiescent current to below 1μA in off mode. The component offers ±2% output accuracy and integrates short-circuit constant current limiting and thermal protection for robust operation.

Feature Summary

• Logic-controlled electronic shutdown function enables ultra-low power consumption in standby modes
• Internal protection mechanisms include short-circuit constant current limiting and thermal overload protection
• Designed for stability using small ceramic capacitors on the output side

Applications

• Low-power battery-powered portable electronics
• Automotive body and interior control units requiring AEC-Q100 qualified components
• Always-on systems needing efficient voltage regulation from varying supply rails

Procurement Notes

Verify the specific package type required for your design, as the LDK130 series is available in SOT23-5L, SOT323-5L, and DFN6 configurations. Confirm that the fixed 1.2V output aligns with your system's power rail requirements. Ensure compatibility with ceramic output capacitors to maintain stability. Check for automotive grade qualification if deploying in vehicle environments.

Selection Notes

Select this regulator when a stable 1.2V rail is needed from inputs between 1.9V and 5.5V. It is suitable for applications prioritizing low noise and minimal static current consumption. Consider the specific package constraints of SOT23-5L or DFN6 based on board space. Verify that the 300mA current capability meets the peak load demands of the downstream circuitry.

Part Context

The LDK130C12R belongs to the LDK130 family of ultra-low dropout regulators designed for harsh environments. This series is characterized by very low noise and high precision. It is widely used in industrial and automotive sectors where reliability under temperature variations from -40°C to 125°C is critical. The family supports various fixed voltage outputs to accommodate different digital logic levels.

Replacement Considerations

Direct substitutes may include other LDK130 variants with different output voltages or packages, such as LDK130PU12R in a DFN6 package. Cross-reference electrical parameters like dropout voltage and quiescent current to ensure functional equivalence. Verify pinout compatibility before swapping packages.