LDLN015PU18R

Overview

The LDLN015PU18R is a fixed-output linear voltage regulator manufactured by STMicroelectronics, providing a stable 1.8 V output with a maximum current capability of 150 mA. It operates within an input voltage range of 2.1 V to 5.5 V and features a typical dropout voltage of 86 mV. The device exhibits ultra-low noise performance, specified at 6.3 µV RMS over the 10 Hz to 100 kHz frequency band. Quiescent current consumption is typically 70 µA under full load conditions. The component includes logic-controlled shutdown functionality, reducing standby current to below 1 µA, and incorporates internal short-circuit constant current limiting and thermal protection mechanisms for enhanced reliability.

Feature Summary

• Ultra-low noise operation suitable for sensitive analog loads
• Logic-controlled electronic shutdown for extended battery life
• Internal short-circuit and thermal protection circuits

Applications

• Powering analog-to-digital converters (ADCs)
• Supplying voltage-controlled oscillators (VCOs) in mobile devices
• Powering personal digital assistants (PDAs)

Procurement Notes

Verify the specific suffix PU18R against official datasheets to confirm the 1.8 V fixed output voltage and DFN-6 package configuration. Confirm RoHS compliance status and check for end-of-life notifications or obsolescence warnings prior to procurement. Ensure the supplier provides valid traceability documentation matching the manufacturer's part identification standards.

Selection Notes

Select this component when designing low-power battery-operated systems requiring clean power for noise-sensitive analog circuits. The device is appropriate for applications where space is limited due to its compact packaging. Consider the input voltage range and required output accuracy when evaluating compatibility with system power rails and load requirements.

Part Context

This component belongs to the LDLN015 series of ultra-low noise linear regulators from STMicroelectronics. The series is engineered for high-performance applications demanding minimal output ripple and high power supply rejection ratio (PSRR). These regulators are designed to operate stably with ceramic capacitors, simplifying circuit design while maintaining robust dynamic performance in portable electronics.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific variant are not available in the provided reference data.