AO4447

Overview

The AO4447 is a P-Channel Enhancement Mode Field Effect Transistor manufactured by Alpha & Omega Semiconductor Inc. It features a drain-source voltage (VDS) of -30 V and a continuous drain current (ID) of -15 A at VGS = -10 V. The maximum on-resistance (RDS(ON)) is specified as less than 7.5 mΩ at VGS = -10 V and less than 12 mΩ at VGS = -4 V. The device utilizes advanced trench technology to achieve low gate charge, with a total gate charge (Qg) of up to 120 nC at VGS = -10 V. It is housed in an SOIC-8 package and supports a junction temperature range from -55°C to 150°C.

Feature Summary

• Advanced trench technology provides excellent on-resistance and ultra-low gate charge for efficient switching performance.
• ESD protected with a Human Body Model (HBM) rating of 4 kV.
• Verified for Unclamped Inductive Switching (UIS) capability.
• Electrically identical to the AO4447L variant.

Applications

• Load switch applications
• Battery protection circuits

Procurement Notes

Verify the specific revision status of the datasheet, as the provided documentation indicates Revision 6 from January 2008. Confirm that the component meets RoHS compliance standards and check if the Halogen-free AO4447L variant is required for specific environmental regulations. Ensure the design accounts for the consumer market qualification level stated in the manufacturer's documentation.

Selection Notes

Select this component for designs requiring a -30 V P-Channel MOSFET with high current handling capabilities up to -15 A. Consider the thermal characteristics, specifically the junction-to-ambient resistance, when designing heat dissipation strategies. Verify that the gate drive voltage levels align with the specified RDS(ON) thresholds at -4 V and -10 V for optimal efficiency.

Part Context

The AO4447 belongs to the Alpha & Omega Semiconductor P-Channel MOSFET family, designed using trench technology. It is part of a series that includes electrically identical variants such as the AO4447L. The device is intended for general-purpose switching applications within the consumer electronics sector, offering a balance of low on-resistance and fast switching speeds in an SOIC-8 surface-mount package.

Replacement Considerations

The AO4447L is electrically identical to the AO4447 and serves as a direct substitute, particularly where halogen-free requirements are necessary. Other P-Channel MOSFETs with similar -30 V ratings and comparable current and resistance specifications may be considered, but pinout and thermal parameters must be verified.

FAQ

Is the AO4447 suitable for critical life support devices?

No. The product has been designed and qualified for the consumer market. Applications or uses as critical components in life support devices or systems are not authorized by Alpha & Omega Semiconductor.

What is the ESD protection rating of the AO4447?

The AO4447 is ESD protected with a Human Body Model (HBM) rating of 4 kV.