AON4803

Overview

The AON4803 is a dual P-channel enhancement mode MOSFET from Alpha & Omega Semiconductor. It utilizes advanced trench technology to achieve low on-resistance, making it suitable for load switch and battery protection applications. The device features a drain-source voltage of -20V and a continuous drain current of -3.4A at VGS=-4.5V. On-resistance values are less than 90mΩ at VGS=-4.5V, 120mΩ at VGS=-2.5V, and 165mΩ at VGS=-1.8V. It operates within a junction temperature range of -55°C to 150°C and is housed in an 8-lead DFN 3x2 package.

Feature Summary

• Dual P-channel configuration with advanced trench MOSFET technology
• Low resistance package design for extremely low RDS(ON)
• Logic-level gate drive capability for efficient switching

Applications

• Load switch circuits
• Battery protection systems

Procurement Notes

Verify the component against the official Alpha & Omega Semiconductor datasheet revision dated July 2012. Confirm that the part number matches the specific 20V dual P-channel specification. Ensure the physical package corresponds to the 8-lead DFN 3x2 footprint. Check for any product change notices regarding manufacturing origin or material composition updates prior to finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring a compact dual P-channel solution with low on-resistance. Consider the thermal characteristics, specifically the junction-to-ambient resistance of 110°C/W, for heat dissipation planning. Evaluate the gate threshold voltage requirements to ensure compatibility with the intended control logic levels, particularly for operation at lower gate voltages such as -2.5V or -1.8V.

Part Context

The AON4803 belongs to the family of dual P-channel MOSFETs designed by Alpha & Omega Semiconductor. It shares architectural similarities with other devices in the series but is distinct in its specific voltage rating and current handling capabilities. The device is optimized for consumer market applications where space efficiency and power management are critical design constraints.

Replacement Considerations

Direct substitutes include the AO4803A, which offers similar dual P-channel functionality with a 30V rating. Designers should verify pinout compatibility and thermal performance differences when considering alternative packages or higher voltage variants from the same manufacturer.

FAQ

What is the maximum junction temperature for the AON4803?

The maximum junction temperature for the AON4803 is 150°C.

How does the on-resistance vary with gate-source voltage?

The on-resistance is less than 90mΩ at VGS=-4.5V, increases to less than 120mΩ at VGS=-2.5V, and reaches less than 165mΩ at VGS=-1.8V.

What is the package type for the AON4803?

The AON4803 is available in an 8-lead DFN 3x2 package.