LDK130M-R

Overview

The LDK130M-R is a low-dropout linear voltage regulator from STMicroelectronics, designed for automotive and industrial applications. It delivers a maximum output current of 300 mA with an input voltage range spanning 1.9 V to 5.5 V. The device features very low quiescent current and extremely low noise characteristics, making it suitable for sensitive analog circuits. It includes logic-controlled electronic shutdown functionality, reducing total current consumption significantly in off-mode. Internal protections include short-circuit constant current limiting and thermal protection. The regulator is stabilized by ceramic capacitors and offers high accuracy with fixed output voltage options.

Feature Summary

• AEC-Q100 qualified for automotive grade 1 reliability requirements
• Logic-controlled electronic shutdown function for ultra-low power consumption
• Compatible with small ceramic output capacitors for stability
• Integrated short-circuit and thermal protection mechanisms

Applications

• Low-power battery-powered automotive systems
• Noise-sensitive sensor power supplies
• Embedded control units requiring stable voltage rails
• Industrial IoT devices with strict power budgets

Procurement Notes

Verify the specific suffix letter (e.g., R, Y) to confirm the exact output voltage and package variant, as these determine electrical parameters. Ensure the ordering code matches the required AEC-Q100 qualification status if used in automotive contexts. Confirm lead times and availability directly with authorized distributors, as stock levels fluctuate. Check RoHS compliance documentation for environmental regulations relevant to your region.

Selection Notes

Select this component when designing circuits that require high efficiency under light loads due to its low quiescent current. Consider the dropout voltage specifications relative to your minimum input voltage to ensure regulation is maintained. Evaluate the thermal performance based on the expected load current and ambient temperature conditions. Verify that the chosen output voltage variant meets the precise requirements of the downstream load without exceeding maximum ratings.

Part Context

This part belongs to the LDK130 series of low-dropout regulators manufactured by STMicroelectronics. The series is characterized by its focus on automotive-grade reliability combined with low-noise performance. Variants within the series share common internal architectures but differ in fixed output voltages and packaging options such as SOT23-5L, SOT323-5L, and DFN6 packages. The series supports a wide range of fixed output voltages tailored for various digital and analog supply needs.

Replacement Considerations

Direct substitutes must match the 300 mA output current, 1.9 V to 5.5 V input range, and SOT23-5L or compatible package. Verify that alternative parts also offer AEC-Q100 qualification if automotive use is intended. Compare pinouts carefully to ensure compatibility with existing PCB layouts. Check for equivalent noise and quiescent current specifications to maintain system performance integrity.