NCP380LSN10AAT1G

Overview

The NCP380LSN10AAT1G is a high-side power distribution switch from onsemi, designed for applications involving heavy capacitive loads and short circuits. It integrates a P-channel MOSFET with a typical on-resistance of 70 mΩ. The device features an internally fixed current limit threshold of 1 A. It operates within a supply voltage range of 2.5 V to 5.5 V and supports a maximum output current of 1 A. The component includes controlled rise and fall times to minimize current ringing during switching events. It provides protection against over-current, reverse voltage, and over-temperature conditions via a flag output. The unit is housed in a 5-TSOP surface-mount package and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a P-channel MOSFET with controlled rise and fall times to minimize current ringing during switching.
• Provides internal reverse-voltage detection to disable the switch if output voltage exceeds input voltage.
• Features a logic flag output that asserts low during over-current, reverse-voltage, or over-temperature conditions.

Applications

• Power distribution systems requiring protection against heavy capacitive loads
• Applications susceptible to short-circuit conditions
• High-side switching for load drivers

Procurement Notes

Verify the specific suffix '10' confirms the internally fixed 1 A current limit threshold, as other variants in the NCP380 family offer adjustable or different fixed limits. Ensure the TSOP-5 package matches the design footprint requirements. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Cross-reference the datasheet revision to ensure all electrical characteristics align with the intended operational environment.

Selection Notes

Select this component when a fixed 1 A current limit is sufficient for the load profile, eliminating the need for external programming resistors. The integrated reverse voltage protection simplifies circuit design compared to discrete solutions. Consider the 70 mΩ on-resistance for power dissipation calculations under continuous load. The single-output configuration makes it suitable for individual channel protection rather than multi-rail distribution.

Part Context

This part belongs to the NCP380 series of high-side power switches. The series offers various packages including DFN and TSOP, with options for fixed or user-adjustable current limits ranging from 500 mA to 2.1 A. The NCP380LSN10AAT1G specifically utilizes the TSOP-5 outline, distinguishing it from the DFN-packaged counterparts like the NCP380HMU series which may share similar electrical protections but differ in thermal performance and pinout.

Replacement Considerations

NCP380LSNAJAAT1G (Adjustable current limit variant)

FAQ

Is the current limit threshold adjustable on the NCP380LSN10AAT1G?

No, the current limit threshold is internally fixed at 1 A for this specific part number. Adjustable versions require external resistors and are designated with different suffixes.

How does the NCP380LSN10AAT1G protect against reverse polarity?

It incorporates an internal reverse-voltage detection comparator that disables the power switch if the output voltage becomes higher than the input voltage, protecting devices on the input side.