LD39015J12R

Overview

The LD39015J12R is a low-dropout linear voltage regulator from STMicroelectronics, providing a fixed 1.2 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 at 100 mA load. The device exhibits ultra-low quiescent current, typically 20 μA at no load, and reduces consumption to below 1 μA in shutdown mode via logic control. It maintains stability with ceramic capacitors and includes internal short-circuit constant current limiting and thermal protection.

Feature Summary

• Ultra-low dropout voltage operation for efficient power management
• Logic-controlled electronic shutdown for extended battery life
• Internal short-circuit and thermal protection mechanisms
• Stable performance with ceramic output capacitors

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 for the LD39015J series. Confirm the '12' designation corresponds to the 1.2 V fixed output voltage. Ensure compatibility with the required 1 μF ceramic capacitor for stability. Check for any manufacturing changes or obsolescence notices from STMicroelectronics prior to finalizing procurement plans.

Selection Notes

Select this component when a fixed 1.2 V rail is required with minimal footprint due to the flip-chip package. It is suitable for designs prioritizing low noise and high power supply rejection ratio in portable electronics. Consider the input voltage range limits and ensure the load current does not exceed the guaranteed 150 mA limit under all operating conditions.

Part Context

This part belongs to the LD39015 series of low-quiescent-current, low-noise voltage regulators. The 'J' suffix typically denotes the flip-chip package variant, distinguishing it from other package options like SOT-23-5 found in the M-series. The series is designed for space-constrained, battery-operated applications requiring efficient power regulation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications against alternative LDOs if cross-referencing is necessary.