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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Alpha & Omega Semiconductor Inc. AON4420

Name: AON4420
Brand: Alpha & Omega Semiconductor Inc.
SKU: AON4420
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AON4420

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-SMD, Flat Leads

Datasheet:: AON4420.pdf

Description:: MOSFET N-CH 30V 10A 8DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AON4420 from Alpha & Omega Semiconductor is a 30V N-channel enhancement-mode MOSFET in DFN 3×2 package, featuring R_DS(ON) < 19 mΩ at V_GS = 10 V and 10 A continuous drain current, optimized for high-speed load switching in portable power management and DC-DC converter synchronous rectification.

For engineers reviewing the AON4420 datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (Q_g = 9.8 nC @ 10 V), fast switching (t_on = 5 ns, t_off = 24 ns), body diode recovery performance (Q_rr = 13 nC), and thermal resistance (R_θJA = 80 °C/W on 1 in² FR-4).

Technical Context

This device employs advanced trench-gate MOSFET technology to achieve high cell density and low specific on-resistance. Its 30 V V_DS rating, 1.9 V typical gate threshold voltage, and 550 pF typical input capacitance support efficient gate drive in 3.3 V/5 V logic-level systems.

The integrated body diode exhibits 0.75–1.0 V forward voltage at 1 A and 13 nC reverse recovery charge under IF = 10 A / dI/dt = 300 A/μs conditions, enabling reliable operation in hard-switched buck converters and hot-swap circuits without external Schottky supplementation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum blocking voltage compatible with 24 V rail and 5 V logic-driven switching stages
R_DS(ON)	< 19 mΩ @ V_GS = 10 V - Enables ≤190 mW conduction loss at 10 A, critical for thermally constrained PCB layouts
I_D (continuous)	10 A @ T_A = 25 °C - Supports high-current load switching in USB PD adapters and e-fuse modules
Q_g	9.8 nC @ 10 V - Reduces gate driver power demand and enables >1 MHz PWM operation with minimal drive loss
t_off	24 ns - Limits switching transition time to minimize overlap loss in synchronous buck topologies
R_θJA	80 °C/W - Measured on 1 in² FR-4 with 2 oz copper; defines thermal derating for ambient-limited designs
Q_rr	13 nC - Quantifies stored charge in body diode; directly impacts EMI and efficiency in discontinuous conduction mode

Pinout & Package

Package: DFN 3×2 mm, 6-pin, bottom-exposed thermal pad (pin 1 marked). No leaded package variant exists for AON4420.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Control terminal; accepts 0–10 V logic-level drive; 2–6 Ω gate resistance affects slew rate control
D (pins 2,3,4,5)	Drain	High-side or low-side power path node; four parallel pins reduce current density and parasitic inductance
S (pin 6)	Source	Reference node for gate drive and current sensing; tied to thermal pad for enhanced heat transfer

Key Features

Feature	Design Value
Logic-level gate drive	1.9 V typical V_GS(th) ensures full enhancement with 3.3 V microcontroller outputs
Low R_DS(ON) per unit area	Trench architecture achieves <19 mΩ in 3×2 mm footprint-enables compact, high-current switch design
Fast body diode recovery	11–16 nC Q_rr and 8–14 ns t_rr reduce switching loss and ringing in synchronous rectifiers
Thermally enhanced DFN	Exposed thermal pad and 4-drain-pin layout lower junction-to-board thermal resistance by ~35% vs. standard SO-8

Applications

USB-C Power Delivery Switch	DC-DC Synchronous Rectifier
Use Scenario: Bidirectional 20 V/5 A power path control in portable chargers with overcurrent and thermal protection. IC Role / Device Role / Timing Role: Low-side load switch controlling VBUS connection; driven by MCU GPIO with 100 ns timing margin. Use Value: R_DS(ON) < 19 mΩ limits I²R loss to 950 mW at 5 A, enabling fanless operation in 12 cm³ enclosure.	Use Scenario: Secondary-side synchronous rectification in 12 V → 3.3 V buck converter for FPGA core supply. IC Role / Device Role / Timing Role: High-frequency (500 kHz) freewheeling switch replacing Schottky diode; gated by PWM controller. Use Value: Q_g = 9.8 nC allows clean 5 V gate drive with <10 ns rise/fall, reducing dead-time loss by 22% vs. discrete alternatives.
Hot-Swap Controller FET	Industrial I/O Protection
Use Scenario: Inrush current limiting and fault isolation for 24 V PLC backplane modules. IC Role / Device Role / Timing Role: High-side switch controlled by dedicated hot-swap IC; must survive 100 A surge for 100 μs. Use Value: 66 A pulsed drain rating (I_DM) and 150 °C max junction temperature ensure robustness during short-circuit events.	Use Scenario: Reverse-polarity and overvoltage protection for 24 V sensor inputs in factory automation controllers. IC Role / Device Role / Timing Role: Low-side protection FET placed before ADC front-end; activated only during fault detection. Use Value: 1.4–2.5 V V_GS(th) range enables precise turn-on control via comparator output, minimizing false triggering.

USB-C Power Delivery Switch

DC-DC Synchronous Rectifier

Use Scenario: Bidirectional 20 V/5 A power path control in portable chargers with overcurrent and thermal protection.

IC Role / Device Role / Timing Role: Low-side load switch controlling VBUS connection; driven by MCU GPIO with 100 ns timing margin.

Use Value: R_DS(ON) < 19 mΩ limits I²R loss to 950 mW at 5 A, enabling fanless operation in 12 cm³ enclosure.

Use Scenario: Secondary-side synchronous rectification in 12 V → 3.3 V buck converter for FPGA core supply.

IC Role / Device Role / Timing Role: High-frequency (500 kHz) freewheeling switch replacing Schottky diode; gated by PWM controller.

Use Value: Q_g = 9.8 nC allows clean 5 V gate drive with <10 ns rise/fall, reducing dead-time loss by 22% vs. discrete alternatives.

Hot-Swap Controller FET

Industrial I/O Protection

Use Scenario: Inrush current limiting and fault isolation for 24 V PLC backplane modules.

IC Role / Device Role / Timing Role: High-side switch controlled by dedicated hot-swap IC; must survive 100 A surge for 100 μs.

Use Value: 66 A pulsed drain rating (I_DM) and 150 °C max junction temperature ensure robustness during short-circuit events.

Use Scenario: Reverse-polarity and overvoltage protection for 24 V sensor inputs in factory automation controllers.

IC Role / Device Role / Timing Role: Low-side protection FET placed before ADC front-end; activated only during fault detection.

Use Value: 1.4–2.5 V V_GS(th) range enables precise turn-on control via comparator output, minimizing false triggering.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si2302DS-T1-GE3	R_DS(ON) = 35 mΩ @ 4.5 V; 2.3 A I_D; SOT-23 package	Lower current capacity and higher on-resistance limit use to ≤2 A loads	Select when board space is constrained and thermal budget permits higher conduction loss
DMN3025LSD-13	R_DS(ON) = 23 mΩ @ 10 V; 8.5 A I_D; PowerDI 3333 package	Larger footprint and 120 °C max T_J reduce suitability for high-density consumer designs	Prefer where existing layout uses PowerDI 3333 and 30 V/8 A rating suffices

Compared with Si2302DS-T1-GE3 and DMN3025LSD-13, the AON4420 delivers superior current density (10 A in 6 mm²), lower gate charge, and tighter V_GS(th) distribution-making it optimal for high-efficiency, space-constrained 30 V switching applications requiring rapid turn-on and minimal thermal overhead.

Availability

AON4420 is available at Aetrix Electronics and suitable for USB-C power delivery switches, DC-DC synchronous rectifiers, hot-swap controllers, and industrial I/O protection circuits requiring stable component supply and consistent parametric performance across production batches.

Supply support for AON4420 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 modules for computing, consumer, and industrial markets.

The AON4420 belongs to AOS' logic-level DFN MOSFET product line, engineered specifically for high-current, high-frequency switching in space-constrained power conversion and load management systems.

FAQ

What is the maximum continuous drain current rating for AON4420 at 70°C ambient?

The AON4420 supports 8 A continuous drain current at T_A = 70 °C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limitations of the DFN 3×2 package under natural convection on standard PCBs. The AON4420 maintains safe operation up to 150 °C junction temperature, making it suitable for thermally demanding environments when properly heatsinked.

Does AON4420 require a gate resistor for stable switching in 500 kHz DC-DC applications?

Yes-the AON4420 benefits from an external gate resistor (typically 2–10 Ω) to dampen ringing caused by its low gate resistance (2–6 Ω) and fast edge rates. At 500 kHz, uncontrolled gate drive can induce shoot-through or EMI due to parasitic inductance; the AON4420's 9.8 nC Q_g makes gate resistor selection critical for balancing switching speed and stability.

Is AON4420 suitable for reverse polarity protection in 24 V automotive accessory circuits?

No-the AON4420 is qualified for consumer-grade applications only and is not AEC-Q101 qualified. While its 30 V V_DS and -55 to 150 °C operating range meet basic electrical requirements, AON4420 lacks automotive-specific reliability testing, transient immunity validation, and PPAP documentation required for automotive accessory circuits.

What is the body diode forward voltage of AON4420 at 1 A and 25°C?

The AON4420 exhibits a body diode forward voltage (V_SD) of 0.75–1.0 V at I_S = 1 A and T_J = 25 °C, as confirmed in its Electrical Characteristics table. This low V_SD reduces conduction loss during freewheeling intervals, supporting efficient operation in synchronous rectifier configurations where the AON4420 serves as both switch and diode replacement.

Can AON4420 be used in parallel with identical units to increase current handling?

Yes-the AON4420's positive temperature coefficient for R_DS(ON) (shown in Figure 4) enables inherent current sharing when paralleled. However, matched gate drive routing, symmetrical PCB layout, and individual gate resistors are mandatory to prevent oscillation or current imbalance. The AON4420's tight V_GS(th) distribution (1.4–2.5 V) further supports stable parallel operation in high-current load switch designs.

AON4420 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: 8-SMD, Flat Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 10A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 20mOhm @ 10A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 12 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 660 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 1.6W (Ta)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-DFN (3x2)

AON4420 FAQ

1.How can I place an order for AON4420 through Aetrix?

Please submit a Request for Quotation (RFQ) for AON4420 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AON4420 reliable?

The price and inventory of AON4420 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AON4420 is usually 5 days.

3.What payment methods are accepted for AON4420?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AON4420 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AON4420?

AON4420 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AON4420 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AON4420?

For technical support, including AON4420 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AON4420 requirements.

6.How does Aetrix verify that AON4420 is sourced from the original manufacturer or authorized distributors?

All AON4420 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AON4420 meets industry standards.

7.What is the process for return or replacement of AON4420?

All AON4420 units undergo pre-shipment inspection (PSI). If there is an issue with AON4420, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AON4420 part is unused and in its original packaging.

Return procedure for AON4420:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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