LD39030SJ28R

Overview

The LD39030SJ28R is a low-dropout linear regulator from STMicroelectronics providing a fixed 2.8 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. It includes internal soft-start, short-circuit constant current limiting, and thermal protection, stabilized by ceramic capacitors.

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 drain
• Integrated protection mechanisms including short-circuit constant current limiting and thermal shutdown
• Internal soft-start circuitry to manage inrush currents during initialization

Applications

• Low power battery-powered portable electronics
• Noise-sensitive analog circuits requiring stable voltage rails
• Embedded systems requiring efficient power management with ceramic capacitor compatibility

Procurement Notes

Verify the specific suffix '28R' corresponds to the 2.8 V fixed output variant when sourcing. Confirm package type matches FlipChip-4 specifications. Ensure compliance with RoHS directives as indicated for the series. Cross-reference datasheet revision dates to confirm parameter consistency. Validate supplier documentation against official STMicroelectronics part identification standards.

Selection Notes

Select this component for applications requiring high efficiency under light loads due to ultra-low quiescent current. Suitable for designs constrained by space due to compact FlipChip packaging. Ideal for noise-sensitive environments given low output noise characteristics. Consider input voltage headroom requirements relative to the 200 mV typical dropout specification.

Part Context

Part of the LD39030 series of low-noise voltage regulators designed for mobile and handheld devices. The series emphasizes low power consumption and small form factor integration. Manufactured by STMicroelectronics, these regulators are categorized under PMIC solutions for portable electronics requiring reliable voltage regulation from single-cell lithium batteries.

Replacement Considerations

LD39030SJ30R: Fixed 3.0 V output variant with identical electrical characteristics and packaging.