NCP380HMU21AATBG

Overview

The NCP380HMU21AATBG is a high-side power distribution switch from onsemi, featuring a single P-channel MOSFET output. It supports an input voltage range of 2.5 V to 5.5 V and delivers a maximum output current of 2.1 A with a fixed current limit of 2.1 A. The device exhibits a maximum on-resistance of 75 mΩ in the uDFN-6 package. Key timing parameters include a maximum rise time of 4 ms and a maximum fall time of 3 ms. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a P-channel MOSFET with controlled slew rates to minimize current ringing during switching events.
• Provides active high-side load protection through fixed current limiting and reverse voltage detection.
• Features a flag logic output that signals fault conditions such as overcurrent, reverse voltage, or thermal stress.

Applications

• Power distribution systems requiring high-side switching capabilities
• Applications involving large capacitive loads where inrush current control is necessary
• Systems susceptible to short-circuit conditions requiring robust current limiting

Procurement Notes

Verify the specific suffix 'AATBG' against the manufacturer's official datasheet to confirm the fixed current limit configuration and package type. Ensure compatibility with the required operating voltage range of 2.5 V to 5.5 V. Confirm that the uDFN-6 footprint matches the design layout. Check for any recent Product Change Notifications regarding material composition or manufacturing site changes.

Selection Notes

Select this component when a fixed 2.1 A current limit is sufficient for the load requirements. It is suitable for designs needing controlled turn-on/off speeds to reduce electromagnetic interference. Consider alternative models within the NCP380 family if adjustable current limits or different package types are required. Verify that the thermal dissipation capabilities of the uDFN-6 package meet the application's power loss constraints.

Part Context

This part belongs to the NCP380 series of high-side power switches designed for robust power distribution. The series offers various configurations including fixed and adjustable current limits. The NCP380HMU21AATBG specifically provides a fixed 2.1 A limit, distinguishing it from adjustable variants like the NCP380HMUAJAATBG. It shares common features such as reverse voltage protection and status flagging with other members of the family.

Replacement Considerations

The NCP380HMU15AATBG serves as a functional substitute with a lower fixed current limit of 1.5 A. The NCP380HMU20AATBG offers a similar 2.1 A output but may have slight parameter variations. Verify pinout compatibility and ensure the replacement meets the specific current handling requirements of the circuit.

FAQ

How does the NCP380HMU21AATBG protect against reverse voltage?

The device includes an internal reverse voltage detection comparator that disables the power switch if the output voltage exceeds the input voltage, protecting upstream components.

What is the function of the flag output on this IC?

The flag output goes low to indicate fault conditions, including overcurrent events, reverse voltage presence, or excessive junction temperature.

Is the current limit on the NCP380HMU21AATBG adjustable?

No, the NCP380HMU21AATBG has a fixed current limit of 2.1 A. Adjustable current limits are available in other variants within the NCP380 series.