LD39015J25R

Overview

The LD39015J25R is a low quiescent current, low noise voltage regulator from STMicroelectronics. It provides a maximum output current of 150 mA with an input voltage range spanning 1.5 V to 5.5 V. The device features a typical dropout voltage of 90 mV and maintains stability when used with ceramic capacitors. Its ultra-low drop-voltage, low quiescent current, and low noise characteristics make it suitable for low power battery powered applications. Power supply rejection reaches 74 dB at low frequencies before rolling off at 10 kHz. An enable logic control function allows the device to enter shutdown mode, reducing total current consumption to lower than 1 μA. Internal protections include short-circuit constant current limiting and thermal protection.

Feature Summary

• Ultra-low dropout voltage operation ensures efficient power delivery in battery-powered systems.
• Logic-controlled electronic shutdown minimizes current consumption during inactive periods.
• Integrated short-circuit constant current limiting and thermal protection safeguard against operational faults.

Applications

• Mobile phones
• Personal digital assistants (PDAs)
• Cordless phones

Procurement Notes

Verify the specific suffix 'J' indicates the flip-chip package configuration rather than a functional change. Confirm the '25' designation corresponds to the fixed 2.5 V output voltage as per standard naming conventions. Ensure compatibility with ceramic output capacitors is maintained for stable regulation under load conditions.

Selection Notes

Select this component for designs requiring minimal footprint and high efficiency in portable electronics. The flip-chip package offers space savings compared to traditional leaded packages. Consider the low noise profile for sensitive analog circuits within mobile communication devices where power integrity is critical.

Part Context

This part belongs to the LD39015 series of low dropout linear regulators designed by STMicroelectronics. The series is characterized by its ability to operate with ceramic capacitors, simplifying board layout. The J suffix typically denotes the flip-chip variant, distinguishing it from other package options like SOT-23-5 found in related models such as the LD39015MxxR.

Replacement Considerations

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