LDK130M15RY

Overview

The LDK130M15RY is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics, designed for automotive applications. It provides a fixed output voltage of 1.5 V with a maximum output current of 300 mA. The device operates within an input voltage range of 1.9 V to 5.5 V and features a typical dropout voltage of 100 mV at 100 mA load. Key electrical parameters include a quiescent current of 60 µA (maximum 120 µA) and a power supply rejection ratio of 55 dB between 120 Hz and 10 kHz. It is housed in a SOT-23-5 surface-mount package and complies with AEC-Q100 Grade 1 qualification.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for robust performance in vehicle environments.
• Ultra-low noise architecture ensures clean power delivery for sensitive analog and RF circuits.
• Logic-controlled enable function allows deep shutdown mode with minimal standby current consumption.
• Integrated protection mechanisms include short-circuit constant current limiting and thermal overload shutdown.

Applications

• Post-regulation stages in automotive electronic control units requiring precise voltage stability.
• Power supplies for battery-operated portable devices where low quiescent current extends operational life.
• Noise-sensitive sensor interfaces in automotive body modules and instrumentation clusters.

Procurement Notes

Verify the specific suffix 'Y' indicates the reel packaging configuration as documented by the manufacturer. Confirm that the AEC-Q100 Grade 1 qualification aligns with your system's automotive reliability requirements. Ensure the SOT-23-5 footprint matches your PCB layout constraints. Cross-reference the datasheet for any recent product change notices regarding lead-frame or assembly updates.

Selection Notes

Select this component when a fixed 1.5 V rail is required with high current capability in a compact automotive form factor. The low dropout characteristic makes it suitable for inputs close to the output voltage. Consider the 60 µA quiescent current for battery efficiency. Verify that the ceramic capacitor requirement for stability is met in the design. Compare against other LDK130 variants if different output voltages are needed.

Part Context

This part belongs to the LDK130 family of low-dropout regulators from STMicroelectronics. The family offers various fixed output voltages ranging from 0.8 V to 3.5 V in 100 mV steps. All variants share similar low-noise and low-quiescent-current characteristics optimized for automotive and portable applications. The M15 designation specifically sets the output to 1.5 V.

Replacement Considerations

LDK130M15R is a non-reel variant of the same electrical specification. Other LDK130 series members provide different fixed output voltages but maintain identical package and functional profiles.