LDK130PU15R

Overview

The LDK130PU15R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics, providing a stable 1.5V output with a maximum current capacity of 300mA. It operates within an input voltage range of 1.9V to 5.5V and features a typical dropout voltage of 100mV at 100mA load. The device exhibits a quiescent current of 60µA and supports logic-controlled shutdown with consumption below 1µA. Packaged in a compact 6-DFN (1.2x1.3mm) surface-mount format, it includes internal overcurrent and thermal protection mechanisms suitable for space-constrained designs.

Feature Summary

• Logic-controlled electronic shutdown function enables deep sleep mode with ultra-low standby current consumption
• Compatible with small ceramic output capacitors, eliminating the need for bulky tantalum or electrolytic components
• Integrated short-circuit constant current limiting and thermal overload protection ensures robust operation under fault conditions

Applications

• Low-power battery-powered portable electronics requiring extended runtime
• Noise-sensitive analog circuits needing clean power supply rails
• Automotive embedded systems utilizing AEC-Q100 qualified components

Procurement Notes

Verify the specific suffix PU15R confirms the 1.5V fixed output variant and DFN6 package configuration. Confirm RoHS compliance status and moisture sensitivity level requirements match your assembly process specifications. Ensure ordering documentation references the correct manufacturer part number to avoid substitution errors during procurement.

Selection Notes

Select this component when a fixed 1.5V rail is required with minimal footprint constraints. The 6-DFN package offers superior thermal dissipation compared to smaller alternatives while maintaining a low profile. Consider the 300mA current limit against peak load demands to ensure adequate headroom without excessive heat generation in enclosed environments.

Part Context

This device belongs to the LDK130 series of low-dropout regulators designed for high-efficiency power management. The series emphasizes low noise and low quiescent current characteristics, making it distinct from standard LDOs. It serves as a critical power regulation element in modern portable and automotive applications where energy efficiency and signal integrity are paramount design considerations.

Replacement Considerations

Direct substitutes include other LDK130 variants with different fixed output voltages such as LDK130PU30R for 3.0V outputs. Cross-reference pin-compatible LDOs from other manufacturers only if electrical parameters like dropout voltage and PSRR meet or exceed the original specifications.