Alpha & Omega Semiconductor Inc. AON4407

Overview

AON4407 from Alpha & Omega Semiconductor is a P-channel enhancement-mode MOSFET designed for low-voltage load switching applications, featuring -12 V drain-source breakdown voltage, -9 A continuous drain current at V_GS = -4.5 V, and R_DS(ON) < 20 mΩ under the same condition. It operates with gate voltages as low as -1.8 V and is housed in a thermally enhanced DFN 3×2 package.

For engineers reviewing the AON4407 datasheet, pinout, applications, or equivalent options, key selection criteria include low-threshold gate drive compatibility, sub-20 mΩ on-resistance at 1.8–4.5 V gate bias, thermal performance in compact PCB layouts, and suitability for battery-powered load switching where low quiescent current and fast turn-off are critical.

Technical Context

The AON4407 employs advanced trench-gate technology to achieve low R_DS(ON) and low gate charge (Q_g = 19–23 nC), enabling efficient switching in high-duty-cycle DC load control. Its gate threshold voltage range of -0.35 V to -0.85 V ensures reliable turn-on with logic-level P-channel drive signals.

Thermal design is supported by a maximum junction-to-lead resistance of 25 °C/W and junction-to-ambient resistance of 90 °C/W on a 1-in² FR-4 board. The device's body diode exhibits t_rr = 22–27 ns and Q_rr = 17 nC, making it suitable for synchronous rectification and bidirectional current paths in compact power stages.

Key Specifications

Pinout & Package

Package: DFN 3×2 (3 mm × 2 mm, 0.75 mm height), exposed drain pad for thermal conduction and electrical connection. Pin 1 is Gate (G); Drain (D) occupies pins 2, 3, 4, 5, and 6; Source (S) is pin 7.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel load switch applications.

Compared with Si2301DDS and DMN2020LFG-7, the AON4407 delivers superior R_DS(ON) at low gate voltages and optimized thermal resistance in its DFN 3×2 package, making it preferred for compact, high-current 12 V load switching where gate drive simplicity and thermal headroom are critical.

Availability

AON4407 is available at Aetrix Electronics and suitable for battery-powered load switching, USB-C power delivery circuits, and industrial sensor node power gating requiring stable component supply and consistent parametric performance across production lots.

Supply support for AON4407 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-efficiency MOSFETs, IGBTs, and power ICs for consumer, computing, and industrial markets.

The AON4407 belongs to AOS's low-voltage trench-MOSFET product line, engineered specifically for space-constrained, battery-operated systems requiring logic-level gate drive, low conduction loss, and robust thermal performance in DFN packages.

FAQ

What is the maximum continuous drain current rating for the AON4407?

The AON4407 supports -9 A continuous drain current at T_A = 25 °C with V_GS = -4.5 V. At elevated ambient temperatures or reduced gate drive, derating applies-e.g., -7 A at T_A = 70 °C. This rating assumes proper PCB thermal design using the DFN package's exposed drain pad to maintain junction temperature below 150 °C. The AON4407 datasheet specifies absolute maximum pulsed current as -60 A for ≤10 s.

Does the AON4407 support 1.8 V gate drive, and what is its R_DS(ON) at that voltage?

Yes, the AON4407 is explicitly characterized for 1.8 V gate drive: its V_GS(th) minimum is -0.35 V, ensuring reliable turn-on with -1.8 V applied. At V_GS = -1.8 V and I_D = -7.5 A, R_DS(ON) is guaranteed ≤ 31 mΩ. This makes the AON4407 suitable for direct interfacing with 1.8 V I/O microcontrollers without external level shifters-critical for ultra-low-power applications like sensor nodes and wearables.

What is the thermal resistance (R_θJA) of the AON4407, and how is it measured?

The AON4407 has a maximum R_θJA of 90 °C/W, measured on a 1-in² FR-4 board with 2 oz copper in still air at T_A = 25 °C. This value reflects real-world thermal performance under standardized test conditions-not a theoretical limit. Actual R_θJA in a given design depends on PCB layout, copper area, airflow, and proximity to other heat sources. For improved thermal management, the AON4407's exposed drain pad must be soldered to a large copper pour or thermal via array.

Is the AON4407 ESD-protected, and what is its HBM rating?

Yes, the AON4407 incorporates on-chip ESD protection and is rated per JEDEC JESD22-A114 (Human Body Model). While the exact kV rating is not specified in the provided datasheet excerpt, AOS typically qualifies similar DFN MOSFETs to ≥2 kV HBM. This built-in protection safeguards the AON4407 during board assembly and handling, reducing susceptibility to gate oxide damage from static discharge-especially important in automated manufacturing environments.

Can the AON4407 be used in synchronous rectification applications?

The AON4407 can be used in synchronous rectification, particularly in low-voltage DC-DC converters where its body diode characteristics are leveraged. With t_rr = 22–27 ns and Q_rr = 17 nC at I_F = -9 A, the AON4407 offers fast, low-loss reverse recovery-reducing switching losses and voltage overshoot compared to standard Schottky diodes. However, its P-channel topology requires careful gate timing control to avoid shoot-through; it is most effective in buck or flyback secondary-side synchronous rectification with dedicated gate drivers.