LD39030SJ12R

Overview

The LD39030SJ12R is a low-noise linear regulator IC from STMicroelectronics, providing a fixed 1.2 V output with a maximum current of 300 mA. It operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 200 mV at full load. The device exhibits very low quiescent current, typically 20 μA at no load and 40 μA at 300 mA load, with shutdown consumption below 1 μA. Output voltage tolerance is ±2.0% at 25 °C, and noise is specified at 30 μVRMS from 1 kHz to 100 kHz. It utilizes a flip-chip package with four bumps on a 0.8 x 0.8 mm pitch.

Feature Summary

• Ultra-low dropout voltage capability for efficient power management in battery-powered systems
• Logic-controlled electronic shutdown function enabling deep sleep modes with minimal current draw
• Integrated short-circuit constant current limiting and thermal protection for enhanced reliability

Applications

• Low power battery-powered applications requiring stable voltage regulation
• Noise-sensitive circuits utilizing ceramic capacitor stabilization
• Portable devices necessitating ultra-low quiescent current operation

Procurement Notes

Verify the specific suffix '12R' against official STMicroelectronics documentation to confirm the fixed 1.2 V output voltage and reel packaging configuration. Ensure compatibility with the required flip-chip footprint during procurement. Cross-reference the part number with current availability status as distribution channels may vary. Confirm RoHS compliance details through the manufacturer's official datasheet before finalizing orders.

Selection Notes

Select this component when a fixed 1.2 V output is required with high efficiency under light loads. The low noise characteristic makes it suitable for sensitive analog sections. Verify that the system input voltage remains within the 1.5 V to 5.5 V range. Consider the flip-chip package constraints for PCB layout. Ensure external ceramic capacitors meet the stability requirements specified in the technical data.

Part Context

This device belongs to the LD39030 series of low-dropout regulators designed for low-power applications. The series emphasizes low quiescent current and low noise performance. It is categorized under PMIC - Power Management ICs. The flip-chip packaging allows for compact board designs. The product line targets portable electronics where power efficiency and space are critical constraints.

Replacement Considerations

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