LDK715M33R

Overview

The LDK715M33R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics, providing a stable 3.3 V output with a guaranteed maximum current of 85 mA. It operates within an input voltage range of 4.3 V to 24 V and features an ultra-low quiescent current of 5 μA at full load. The device exhibits a typical dropout voltage of 500 mV and maintains stability when used with ceramic output capacitors ranging from 0.47 μF to 10 μF. Packaged in a compact SOT-23-5 surface-mount format, it supports operation across a wide temperature range from -40 °C to +125 °C.

Feature Summary

• Ultra-low quiescent current consumption for battery-powered efficiency
• High input voltage tolerance up to 24 V
• Stable operation with small ceramic output capacitors
• Integrated short-circuit current limitation protection

Applications

• Low power industrial applications
• Battery-powered systems
• Portable electronic devices requiring efficient voltage regulation

Procurement Notes

Verify the specific suffix 'R' corresponds to the required tape-and-reel packaging configuration during procurement. Confirm that the 3.3 V fixed output variant matches the design requirements, as other voltage options exist within the LDK715 family. Ensure compatibility with the SOT-23-5 footprint and validate thermal performance under expected load conditions.

Selection Notes

Select this component when a high input voltage range up to 24 V is required alongside minimal static power consumption. It is suitable for designs prioritizing low quiescent current over high output current capabilities. Consider the SOT-23-5 package constraints for space-limited PCB layouts and verify that the 85 mA output limit meets the peak load demands of the target circuit.

Part Context

This part belongs to the LDK715 series of high-voltage, low-dropout linear regulators. The series is characterized by its ability to handle wide input voltage ranges while maintaining low power dissipation through ultra-low quiescent current. It serves as a power management solution for applications where efficiency and input voltage flexibility are critical design parameters.

Replacement Considerations

The ST715 series offers similar functionality but supports a lower minimum input voltage of 2.5 V compared to the LDK715's 4.3 V minimum. Verify input voltage requirements before substituting, as the LDK715 is optimized for higher input ranges.