Alpha & Omega Semiconductor Inc. AON7466

Overview

AON7466 from Alpha & Omega Semiconductor is a 30V N-Channel enhancement-mode trench MOSFET in DFN 3×3 EP package, featuring R_DS(ON) < 7.5 mΩ at V_GS = 10 V and < 10.5 mΩ at V_GS = 4.5 V, 30 A continuous drain current, and 100% UIS-tested ruggedness. It serves as a high-side switch in synchronous buck converters and point-of-load DC-DC regulators.

For engineers reviewing the AON7466 datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (Q_g = 20–30 nC at 10 V), fast switching (t_D(off) = 17 ns), body-diode recovery performance (Q_rr = 13.5 nC), and thermal resistance (R_θJC = 5 °C/W) for high-efficiency power stage design.

Technical Context

The AON7466 employs advanced trench-gate silicon process to achieve low R_DS(ON) while maintaining robust avalanche capability (E_AS rated) and tight gate threshold control (V_GS(th) = 1.5–2.5 V). Its DFN 3×3 EP package enables high-current handling with low parasitic inductance and efficient heat transfer through the exposed pad.

Designed for high-frequency switching, the device delivers low dynamic losses via optimized capacitance profile (C_iss = 1150 pF, C_rss = 105 pF) and controlled gate resistance (R_g = 0.55–1.65 Ω), supporting clean turn-on/turn-off waveforms in SMPS topologies operating up to several hundred kHz.

Key Specifications

Pinout & Package

Package: DFN 3×3 mm with Exposed Pad (EP), thermally enhanced surface-mount package optimized for PCB copper area heat spreading.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-Channel MOSFET applications.

Compared with BSC014N04LS6 and SiR872DP, the AON7466 offers best-in-class R_DS(ON) per unit area in DFN 3×3 EP, verified 100% UIS robustness, and tighter V_GS(th) distribution-making it optimal for space-constrained, high-reliability 24–30 V SMPS where thermal management and switching consistency are critical.

Availability

AON7466 is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, and USB-C PD power delivery systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AON7466 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-performance MOSFETs, IGBTs, and power ICs for computing, industrial, and consumer markets.

The AON7466 belongs to AOS's TrenchFET® Gen V family, engineered specifically for high-efficiency, high-density DC-DC conversion in datacenter, telecom, and portable power applications.

FAQ

What is the maximum continuous drain current rating for the AON7466?

The AON7466 has a continuous drain current rating of 30 A at T_C = 25°C, derating to 15 A at T_C = 100°C. This rating is package-limited and assumes proper PCB copper area and thermal vias under the exposed pad to maintain junction temperature ≤150°C. The AON7466 datasheet specifies these values under steady-state conditions with appropriate heatsinking.

Does the AON7466 support logic-level gate drive?

Yes, the AON7466 supports logic-level gate drive with guaranteed R_DS(ON) < 10.5 mΩ at V_GS = 4.5 V, making it compatible with 3.3 V and 5 V microcontrollers and PWM controllers. Its gate threshold voltage range (1.5–2.5 V) ensures reliable turn-on without overdriving, and the AON7466 maintains low switching losses even at reduced gate voltages.

Is the AON7466 suitable for synchronous rectification?

Yes, the AON7466 is suitable for synchronous rectification due to its fast body diode recovery (t_rr = 8.7 ns, Q_rr = 13.5 nC) and low R_DS(ON). When used as a low-side switch in buck or flyback topologies, the AON7466 reduces conduction loss versus Schottky diodes, especially at high currents. Its performance is validated in AON7466 reference designs for 500 kHz+ synchronous rectifiers.

What thermal resistance values apply to the AON7466 in standard layout?

In a standard 1 in² FR-4 board with 2 oz copper, the AON7466 exhibits R_θJA = 75 °C/W (t ≤ 10 s) and R_θJC = 5 °C/W. The latter enables accurate junction temperature estimation when the exposed pad is soldered to a large copper pour or heatsink. These values are measured per JEDEC JESD51 standards and documented in the AON7466 datasheet Rev 2.1.

How does the 100% UIS testing benefit AON7466 in real-world applications?

The 100% UIS (Unclamped Inductive Switching) testing ensures every AON7466 unit can safely absorb defined avalanche energy (E_AS) without degradation-critical in hard-switched converters, motor drives, and hot-swap circuits where voltage spikes occur. This eliminates need for external snubbers in many AON7466 deployments and improves field reliability compared to non-tested MOSFETs.