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The LD39115J15R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 1.5V with a maximum output current of 150mA. The device operates within an input voltage range of 1.5V to 5.5V and features a typical dropout voltage of 80mV at 100mA load. Quiescent current is typically 20µA at no load and 35µA at full load, with shutdown consumption below 1µA. Output noise is 33µVRMS from 1kHz to 100kHz. Power supply rejection ratio is 65dB at low frequencies. The component is housed in a 4-bump flip-chip package measuring 0.79x0.79mm.
Verify the specific suffix J15R confirms the 1.5V fixed output variant. Confirm RoHS3 compliance status as required by project specifications. Check lead times due to potential long-term availability constraints associated with this component series. Ensure the flip-chip packaging capability matches the PCB assembly equipment. Validate that the NRND status of the base family does not impact immediate production needs.
Select this regulator when ultra-low static current is critical for extending battery life in portable devices. The low noise characteristic makes it appropriate for sensitive analog or RF circuits. The compact flip-chip footprint is ideal for space-constrained designs. Ensure the input voltage remains within the 1.5V to 5.5V range and that the load does not exceed 150mA. Verify compatibility with ceramic capacitors for stability.
This component belongs to the LD39115 family of low-dropout regulators characterized by low quiescent current and low noise. The family includes various fixed output voltages ranging from 0.8V to 4.5V. All variants share similar electrical characteristics and protection features, differing primarily in their fixed output voltage settings and specific ordering suffixes.
Texas Instruments LP5900TL-1.5/NOPB is a documented substitute offering similar 1.5V output and 150mA current capability.