LD39015J18R

Overview

The LD39015J18R is a low-dropout linear voltage regulator from STMicroelectronics, providing a fixed 1.8 V output with a maximum current of 150 mA. It operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 90 mV. The device ensures stability with ceramic capacitors and includes logic-controlled shutdown for ultra-low quiescent current consumption below 1 μA. Internal protections include short-circuit constant current limiting and thermal shutdown.

Feature Summary

• Ultra-low dropout voltage operation suitable for battery-powered applications
• Logic-controlled electronic shutdown for minimal power consumption
• Compatible with small-size ceramic output capacitors
• Integrated short-circuit and thermal protection mechanisms

Applications

• Mobile phones
• Personal digital assistants (PDAs)
• Cordless phones
• Battery-powered systems

Procurement Notes

Verify the specific suffix 'J' indicates the flip-chip package configuration as documented in official datasheets. Confirm the '18' designation corresponds to the fixed 1.8 V output voltage. Ensure compatibility with the required 1 μF ceramic capacitor for stability. Check for any recent manufacturing changes or obsolescence notices via the manufacturer's official channels before finalizing procurement.

Selection Notes

Select this component when a fixed 1.8 V rail is required with high efficiency at low currents. The flip-chip package offers space savings compared to traditional surface-mount options. Consider the low noise characteristics for sensitive analog circuits. Verify that the input voltage remains within the specified 1.5 V to 5.5 V range during all operating conditions.

Part Context

This part belongs to the LD39015 series of low-quiescent current, low-noise voltage regulators designed for portable electronics. The 'J' suffix typically denotes a specific flip-chip package variant within this family, distinguishing it from standard SOT-23-5 packages found in other series members like the LD39015M.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.