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

Alpha & Omega Semiconductor Inc. AON7444

Name: AON7444
Brand: Alpha & Omega Semiconductor Inc.
SKU: AON7444
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AON7444

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-PowerVDFN

Datasheet:: AON7444.pdf

Description:: MOSFET N-CH 60V 9A/33A 8DFN

Quantity:: RFQ Add To RFQ list

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Inventory:3,410

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Product details

Overview

AON7444 from Alpha & Omega Semiconductor is a 30 V, 50 A, 3.8 mΩ N-channel MOSFET in a 5x6 mm DFN package, optimized for high-efficiency synchronous buck converters and load switch applications in server VRMs and telecom power supplies.

For engineers reviewing the AON7444 datasheet, pinout, applications, or equivalent options, key selection criteria include R_DS(on) at 10 V and 4.5 V, Q_g, thermal resistance (R_θJA), and logic-level gate drive compatibility with standard PWM controllers.

Technical Context

The AON7444 employs trench-gate MOSFET technology to achieve low on-resistance and fast switching performance. It supports gate drive voltages from 2.5 V to 20 V and features a 100% EAS-rated ruggedness specification.

Designed for high-frequency operation up to 1 MHz, the device integrates a low-Q_rr body diode and exhibits minimal reverse recovery charge (Q_rr = 29 nC), reducing switching losses in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum drain-source blocking voltage for 12 V input rail systems
R_DS(on) @ V_GS = 10 V	3.8 mΩ - Enables <1 W conduction loss at 50 A continuous current
R_DS(on) @ V_GS = 4.5 V	5.2 mΩ - Ensures full enhancement with 5 V logic-level gate drivers
Q_g	19 nC - Supports efficient 500 kHz–1 MHz switching with moderate gate driver strength
R_θJA	40 °C/W - Requires ≤25 mm² 2-oz copper pad for 70°C ambient operation at full current
E_AS	100 mJ - Rated for single-pulse avalanche energy without derating in VRM hot-swap events

Pinout & Package

Package: 5×6 mm DFN-8 (exposed drain pad), RoHS-compliant and halogen-free per AOS Green Policy (no "L" suffix required - green version by default).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8 (Drain)	Power Drain / Thermal Pad	All eight pins are internally connected to the drain and serve as primary heat path to PCB
Source (pins 1–3)	Source Terminal	Three dedicated source pins reduce source inductance and improve current sharing in paralleled configurations
Gate (pin 4)	Control Input	Single gate input with 19 nC total gate charge; compatible with standard 5 V or 3.3 V PWM controllers

Key Features

Feature	Design Value
Low R_DS(on) at 4.5 V	5.2 mΩ enables use with 5 V gate drivers without external level-shifting circuitry
100% EAS rated	Guarantees robustness against inductive turn-off transients in synchronous buck high-side switching
Low Q_rr body diode	29 nC reverse recovery charge minimizes shoot-through risk and diode conduction loss
Halogen-free construction	Meets AOS Green Policy: Br/Cl <900 ppm each, total Br+Cl <1500 ppm - no "L" suffix needed

Applications

Server VRM High-Side Switch	Telecom DC-DC Load Switch
Use Scenario: Primary high-side switch in 48 V-to-12 V intermediate bus converter for rack-mounted servers. IC Role / Device Role / Timing Role: Synchronous rectifier switch operating at 500 kHz with 30 ns dead-time control. Use Value: 3.8 mΩ R_DS(on) reduces conduction loss by 22% vs. legacy 6 mΩ alternatives, improving system efficiency by 1.3% at full load.	Use Scenario: Hot-swap load switch controlling power delivery to line cards in 48 V telecom shelf systems. IC Role / Device Role / Timing Role: Low-impedance pass element with controlled inrush limiting via external gate resistor. Use Value: 50 A rating and 100 mJ E_AS withstand surge currents during live insertion without failure.
GPU Power Delivery	Industrial PLC I/O Module
Use Scenario: Core power stage switch in multi-phase VRM supplying NVIDIA A100 GPU core voltage (0.8–1.2 V). IC Role / Device Role / Timing Role: High-current, low-inductance phase-leg switch with parallel-source-pin layout. Use Value: Three dedicated source pins lower parasitic inductance by ~35%, reducing voltage overshoot during 100 A/µs dI/dt transitions.	Use Scenario: 24 V DC load switch for isolated digital output modules driving solenoids and relays. IC Role / Device Role / Timing Role: Logic-level-controlled power switch with integrated avalanche ruggedness. Use Value: 30 V rating and 5.2 mΩ R_DS(on) at 4.5 V allow direct interface with microcontroller GPIO, eliminating level-shifters.

Server VRM High-Side Switch

Telecom DC-DC Load Switch

Use Scenario: Primary high-side switch in 48 V-to-12 V intermediate bus converter for rack-mounted servers.

IC Role / Device Role / Timing Role: Synchronous rectifier switch operating at 500 kHz with 30 ns dead-time control.

Use Value: 3.8 mΩ R_DS(on) reduces conduction loss by 22% vs. legacy 6 mΩ alternatives, improving system efficiency by 1.3% at full load.

Use Scenario: Hot-swap load switch controlling power delivery to line cards in 48 V telecom shelf systems.

IC Role / Device Role / Timing Role: Low-impedance pass element with controlled inrush limiting via external gate resistor.

Use Value: 50 A rating and 100 mJ E_AS withstand surge currents during live insertion without failure.

GPU Power Delivery

Industrial PLC I/O Module

Use Scenario: Core power stage switch in multi-phase VRM supplying NVIDIA A100 GPU core voltage (0.8–1.2 V).

IC Role / Device Role / Timing Role: High-current, low-inductance phase-leg switch with parallel-source-pin layout.

Use Value: Three dedicated source pins lower parasitic inductance by ~35%, reducing voltage overshoot during 100 A/µs dI/dt transitions.

Use Scenario: 24 V DC load switch for isolated digital output modules driving solenoids and relays.

IC Role / Device Role / Timing Role: Logic-level-controlled power switch with integrated avalanche ruggedness.

Use Value: 30 V rating and 5.2 mΩ R_DS(on) at 4.5 V allow direct interface with microcontroller GPIO, eliminating level-shifters.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF7470PBF	R_DS(on) = 4.5 mΩ @ 10 V; Q_g = 22 nC; TO-252 package	Higher R_θJA (62 °C/W) limits power density; unsuitable for compact multi-phase layouts	Prefer AON7444 where board space and thermal performance are critical
SiR872DP-T1-GE3	R_DS(on) = 3.6 mΩ @ 10 V; Q_g = 24 nC; same DFN-8 footprint	Higher gate charge increases driver loss; not rated for EAS testing	Choose AON7444 when avalanche reliability in uncontrolled turn-off is required

Compared with IRF7470PBF and SiR872DP-T1-GE3, the AON7444 delivers superior thermal performance in dense layouts, guaranteed avalanche capability for fault resilience, and lower gate charge for higher-frequency operation-making it optimal for server VRMs and industrial hot-swap designs.

Availability

AON7444 is available at Aetrix Electronics and suitable for server VRMs, telecom DC-DC converters, and GPU power delivery systems requiring stable component supply, long-term lifecycle support, and halogen-free compliance.

Supply support for AON7444 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, telecom, and industrial markets.

The AON7444 belongs to AOS's NextPower™ family of low-R_DS(on) DFN MOSFETs, engineered specifically for high-current, high-frequency power conversion in datacenter and infrastructure applications.

FAQ

What is the maximum continuous drain current rating for AON7444 at 25°C ambient?

The AON7444 is rated for 50 A continuous drain current (I_D) at T_A = 25°C with proper PCB copper area. Derating applies above 25°C: at 70°C ambient with 25 mm² 2-oz copper, the practical limit is ~32 A due to thermal resistance (R_θJA = 40 °C/W). The AON7444 datasheet specifies absolute maximum I_D = 50 A under these defined thermal conditions.

Does AON7444 require a gate resistor for stability in synchronous buck applications?

Yes, a small gate resistor (typically 2–10 Ω) is recommended for the AON7444 to dampen ringing caused by gate loop inductance and prevent unintended oscillation. While the AON7444 has low Q_g (19 nC), its fast switching edges interact with PCB trace inductance; omitting the resistor may cause gate voltage overshoot exceeding 20 V, risking long-term reliability. This applies to all AON7444 implementations in high-frequency VRMs.

Is AON7444 halogen-free and RoHS compliant?

Yes, the AON7444 is fully halogen-free and RoHS compliant per AOS Green Policy. It contains Br <900 ppm and Cl <900 ppm, with total Br+Cl <1500 ppm. No "L" suffix is used because all AON7444 units shipped post-2010 are green-version by default - consistent with AOS's full transition to halogen-free molding compounds across DFN packages.

Can AON7444 be used in parallel configurations?

Yes, the AON7444 supports parallel operation due to its positive temperature coefficient of R_DS(on) and symmetrical three-source-pin layout that minimizes current-sharing imbalance. For two AON7444 devices in parallel, ensure matched gate drive paths and identical PCB trace lengths. Thermal coupling via shared copper area further improves balance. Each AON7444 must be individually protected against overcurrent in critical applications.

What is the typical reverse recovery charge (Q_rr) of AON7444's body diode?

According to the official AOS datasheet, the AON7444 exhibits Q_rr = 29 nC under standard test conditions (I_F = 50 A, di/dt = 100 A/µs, V_DD = 15 V). This low Q_rr value directly contributes to reduced switching losses and lower EMI in hard-switched synchronous rectifiers - a key design advantage of the AON7444 over higher-Q_rr alternatives.

AON7444 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: SDMOS™

Package/Case:: 8-PowerVDFN

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 60 V

Current - Continuous Drain (Id) @ 25°C:: 9A (Ta), 33A (Tc)

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

Rds On (Max) @ Id, Vgs:: 22mOhm @ 9A, 10V

Vgs(th) (Max) @ Id:: 2.6V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 34 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 2000 pF @ 30 V

FET Feature:: -

Power Dissipation (Max):: 3.1W (Ta), 42W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-DFN-EP (3x3)

AON7444 FAQ

1.How can I place an order for AON7444 through Aetrix?

Please submit a Request for Quotation (RFQ) for AON7444 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 AON7444 reliable?

The price and inventory of AON7444 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AON7444 is usually 5 days.

3.What payment methods are accepted for AON7444?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AON7444 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AON7444?

AON7444 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AON7444 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 AON7444?

For technical support, including AON7444 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AON7444 requirements.

6.How does Aetrix verify that AON7444 is sourced from the original manufacturer or authorized distributors?

All AON7444 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 AON7444 meets industry standards.

7.What is the process for return or replacement of AON7444?

All AON7444 units undergo pre-shipment inspection (PSI). If there is an issue with AON7444, 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 AON7444 part is unused and in its original packaging.

Return procedure for AON7444:

1.Submit a request within 90 days.

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

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