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The LD39130SJ30R is a positive fixed linear regulator from STMicroelectronics, delivering a 3V output at up to 300mA. It features a maximum input voltage of 5.5V and a typical dropout voltage of 0.3V at full load. Quiescent current is 45µA, with power supply rejection ratios ranging from 70dB to 65dB across 1kHz to 10kHz. The device includes enable control, overcurrent protection, thermal shutdown, and soft-start functionality. It operates within a temperature range of -40°C to 125°C and is housed in a compact 4-FlipChip package measuring 0.69x0.69mm.
Verify the specific suffix 'J30' confirms the 3V fixed output voltage during procurement. Ensure the FlipChip (FCBGA) package footprint matches the target PCB layout dimensions. Confirm RoHS3 compliance status if required by regional regulations. Cross-reference the manufacturer part number with authorized distributor listings to ensure authenticity and traceability.
Select this component when a fixed 3V output is required with minimal board space constraints due to its small FlipChip package. Consider the 45µA quiescent current for battery life optimization. Verify that the input voltage remains within the 5.5V maximum limit. Evaluate the need for the integrated soft-start feature to manage inrush currents in sensitive downstream circuits.
This device belongs to the LD39130S series of low-dropout regulators designed for ultra-low power applications. It shares the same physical package and core protection features as other variants in the family, differing primarily in the fixed output voltage setting. The series targets applications demanding high efficiency and compact form factors in portable consumer electronics.
Publicly confirmed substitute part numbers are not available in the provided documentation.