AO4818L

Overview

The AO4818L is a dual N-channel MOSFET from Alpha & Omega Semiconductor Inc., packaged in an 8-SOIC (0.154", 3.90mm wide) surface-mount configuration. It features a drain-source voltage of 30V and a continuous drain current of 8A at VGS=10V. The device utilizes advanced trench technology to achieve low on-resistance, specified as less than 19mΩ at VGS=10V and less than 23mΩ at VGS=4.5V. Key electrical parameters include a gate threshold voltage ranging from 1.2V to 2.4V, a maximum gate charge of 18nC at 10V, and an input capacitance of up to 888pF. The component supports a junction temperature range of -55°C to 150°C.

Feature Summary

• Dual N-channel configuration utilizing advanced trench technology for optimized performance
• ESD protected structure with comprehensive avalanche testing verification
• Logic-level gate drive capability suitable for low-voltage control applications

Applications

• Load switch implementations
• Pulse Width Modulation (PWM) circuits

Procurement Notes

Verify the specific ordering suffix against official Alpha & Omega Semiconductor documentation to confirm pinout compatibility and package dimensions. Ensure that any variant designated with an 'L' suffix matches the required thermal and electrical specifications for the target application before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a compact dual N-channel solution with low on-resistance at logic-level gate voltages. Evaluate the thermal resistance characteristics relative to the PCB copper area and ambient conditions to ensure the junction temperature remains within the specified operational limits during steady-state and transient loads.

Part Context

The AO4818L belongs to the AO4818 product family manufactured by Alpha & Omega Semiconductor Inc. This series employs trench MOSFET technology to deliver high efficiency in small surface-mount packages. The device is engineered for general-purpose switching applications where space constraints and low conduction losses are critical design factors.

Replacement Considerations

Direct substitutes must match the 30V rating, 8A current capacity, and SOIC-8 footprint. Verify equivalent RDS(ON) values and gate charge specifications to maintain circuit timing and thermal performance without redesigning the driver stage.

FAQ

What is the maximum gate-source voltage rating?

The absolute maximum gate-source voltage rating is ±20V.

Is the device tested for unclamped inductive switching?

Yes, the datasheet confirms that 100% of units are tested for UIS capability.

What is the typical total gate charge at 10V?

The typical total gate charge (Qg) at VGS=10V is 15nC, with a maximum of 18nC.