NCP380LSN05AAT1G

Overview

The NCP380LSN05AAT1G is a high-side power distribution switch manufactured by onsemi, designed for applications involving large capacitive loads and potential short circuits. It integrates a P-channel MOSFET with a typical on-resistance of 70 mΩ in a DFN package. The device features a fixed current limit threshold of 500 mA. When the output load exceeds this threshold or a short circuit occurs, the IC switches to constant current regulation mode to protect the system. It operates within a supply voltage range of 2.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates a P-channel MOSFET with controlled slew rate to minimize current ringing during switching events.
• Provides internal fixed current limiting that activates constant current regulation upon overload or short circuit conditions.
• Includes reverse voltage detection to disable the switch if output voltage exceeds input voltage, protecting upstream components.
• Features a logic flag output that indicates fault conditions such as overcurrent, reverse voltage, or excessive temperature.

Applications

• Powering SD cards via stable current delivery in embedded systems
• High-side power distribution in automotive electronics
• Load switching in industrial control modules

Procurement Notes

Verify the specific suffix '05' confirms the fixed 500 mA current limit setting, as other variants in the NCP380 family offer adjustable thresholds. Confirm the TSOP-5 package designation matches your PCB footprint requirements. Ensure the RoHS compliance status aligns with your manufacturing regulations. Cross-reference the datasheet revision date to verify any recent parameter updates or pinout changes before finalizing the bill of materials.

Selection Notes

Select this component when a fixed 500 mA current limit is sufficient for the load protection requirements. Choose this part over adjustable variants if external resistor programming is undesirable to reduce component count. Consider the TSOP-5 package size constraints relative to available board space. Verify that the 2.5 V to 5.5 V operating voltage range covers the system's supply rail variations under all expected load conditions.

Part Context

This device belongs to the NCP380 series of high-side power switches from onsemi. The series is engineered for robust performance in environments prone to capacitive inrush currents and short circuits. Variants within the series differ primarily in current limit settings (fixed vs. adjustable) and package types. This specific model represents the low-side enable configuration with a fixed current threshold.

Replacement Considerations

Direct substitutes include NCP380LSN10AAT1G (1 A fixed limit) and NCP380LSNAJAAT1G (adjustable limit). Verify compatibility regarding enable logic polarity and package dimensions before substitution.