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

Alpha & Omega Semiconductor Inc. AON7520

Name: AON7520
Brand: Alpha & Omega Semiconductor Inc.
SKU: AON7520
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AON7520

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-PowerWDFN

Datasheet:: AON7520.pdf

Description:: MOSFET N-CH 30V 48A/50A 8DFN

Quantity:: RFQ Add To RFQ list

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Inventory:5,320

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Product details

Overview

AON7520 from Alpha & Omega Semiconductor is a 30 V, 42 A, 3.8 mΩ N-channel MOSFET in a 5x6 mm DFN package, optimized for high-efficiency DC-DC power conversion in server VRMs and POL converters.

For engineers reviewing the AON7520 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 compliance with halogen-free packaging requirements.

Technical Context

The AON7520 uses Trench MOSFET technology to achieve low on-resistance and fast switching characteristics. It supports logic-level gate drive (V_GS(th) = 1.5 V typical) and exhibits low gate charge (Q_g = 19 nC) for reduced driver losses.

Designed for synchronous buck topologies, it features a 100% EAS-rated rugged body diode and operates within a junction temperature range of –55 °C to +150 °C. Its DFN package enables low-inductance layout and enhanced thermal performance over leaded alternatives.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum drain-source blocking voltage for 12 V input rail applications
R_DS(on) @ V_GS = 10 V	3.8 mΩ - Enables <1 W conduction loss at 16 A continuous current
R_DS(on) @ V_GS = 4.5 V	5.2 mΩ - Ensures robust operation with 5 V gate drive in POL modules
Q_g	19 nC - Reduces gate driver power dissipation and switching transition time
R_θJA	40 °C/W - Achievable with 1-in² 2-oz copper pad; supports >25 W power dissipation
Package	5×6 mm DFN-8 - Exposed drain pad improves thermal path to PCB ground plane

Pinout & Package

Package: 5×6 mm DFN-8 with exposed drain pad (pin 1–3: source; pin 4–6: gate; pin 7–8: drain; pin 7/8 tied internally to thermal pad).

Pin/Terminal	Circuit Role	Design Meaning
1–3	Source	Common return node for channel current; electrically tied to thermal pad via PCB copper
4–6	Gate	Control terminal requiring <19 nC charge for full enhancement; low Miller capacitance (Q_gd = 5.5 nC)
7–8 + thermal pad	Drain	Main power output node; internal connection to exposed copper pad for direct PCB heat sinking

Key Features

Feature	Design Value
Halogen-free construction	Meets AOS Green Policy: Br/Cl <900 ppm each, total Br+Cl <1500 ppm - eliminates corrosive decomposition byproducts
100% EAS rated	Guaranteed 100 mJ single-pulse avalanche energy - supports reliable operation under inductive switching stress
Logic-level gate drive	V_GS(th) = 1.5 V (typ), enabling direct interface with 3.3 V or 5 V PWM controllers without level shifters
Low Q_gd/Q_g ratio	5.5 nC / 19 nC = 0.29 - minimizes Miller-induced shoot-through risk in synchronous rectification

Applications

Server VRM	POL Converter
Use Scenario: High-current, multi-phase buck converter supplying CPU core voltage in datacenter servers. IC Role / Device Role / Timing Role: Synchronous rectifier switch in high-side or low-side position with 300 kHz–1 MHz switching frequency. Use Value: 3.8 mΩ R_DS(on) reduces conduction loss by >15% vs. comparable 5×6 mm MOSFETs, improving VRM efficiency at 40–60 A load.	Use Scenario: Point-of-load regulator delivering 1–3 V at up to 25 A to FPGA or ASIC power rails. IC Role / Device Role / Timing Role: Low-side switch in compact 5×6 mm footprint design with minimal board area. Use Value: 5.2 mΩ R_DS(on) at 4.5 V gate drive ensures stable regulation under 3.3 V controller output, eliminating need for gate boost circuitry.
Telecom PSU	Industrial Motor Drive
Use Scenario: Secondary-side synchronous rectification in 48 V telecom power supply with tight thermal constraints. IC Role / Device Role / Timing Role: Output rectifier in LLC resonant converter operating at 200–500 kHz. Use Value: 40 °C/W R_θJA enables >20 W dissipation on standard 4-layer PCB, reducing heatsink dependency.	Use Scenario: Half-bridge leg in 24 V BLDC motor gate driver module for factory automation equipment. IC Role / Device Role / Timing Role: Low-side switching element handling 30 A peak current with fast turn-off. Use Value: 100 mJ EAS rating prevents failure during motor phase commutation transients and bus voltage spikes.

Server VRM

POL Converter

Use Scenario: High-current, multi-phase buck converter supplying CPU core voltage in datacenter servers.

IC Role / Device Role / Timing Role: Synchronous rectifier switch in high-side or low-side position with 300 kHz–1 MHz switching frequency.

Use Value: 3.8 mΩ R_DS(on) reduces conduction loss by >15% vs. comparable 5×6 mm MOSFETs, improving VRM efficiency at 40–60 A load.

Use Scenario: Point-of-load regulator delivering 1–3 V at up to 25 A to FPGA or ASIC power rails.

IC Role / Device Role / Timing Role: Low-side switch in compact 5×6 mm footprint design with minimal board area.

Use Value: 5.2 mΩ R_DS(on) at 4.5 V gate drive ensures stable regulation under 3.3 V controller output, eliminating need for gate boost circuitry.

Telecom PSU

Industrial Motor Drive

Use Scenario: Secondary-side synchronous rectification in 48 V telecom power supply with tight thermal constraints.

IC Role / Device Role / Timing Role: Output rectifier in LLC resonant converter operating at 200–500 kHz.

Use Value: 40 °C/W R_θJA enables >20 W dissipation on standard 4-layer PCB, reducing heatsink dependency.

Use Scenario: Half-bridge leg in 24 V BLDC motor gate driver module for factory automation equipment.

IC Role / Device Role / Timing Role: Low-side switching element handling 30 A peak current with fast turn-off.

Use Value: 100 mJ EAS rating prevents failure during motor phase commutation transients and bus voltage spikes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRLHS6342	R_DS(on) = 4.2 mΩ @ 4.5 V; Q_g = 22 nC; same 5×6 mm DFN-8 package	Slightly higher conduction loss at low gate drive; marginally slower switching	Prefer AON7520 where <5 mΩ R_DS(on) at 4.5 V is critical for POL efficiency
SiR872DP	R_DS(on) = 3.5 mΩ @ 10 V; Q_g = 25 nC; 5×6 mm PowerPAK SO-8 package	Lower R_DS(on) but higher Q_g; different pinout and thermal pad layout	Choose AON7520 when DFN-8 footprint compatibility and lower gate drive sensitivity are required

Compared with IRLHS6342 and SiR872DP, the AON7520 delivers superior gate-drive flexibility (1.5 V V_GS(th)) and balanced switching-conduction trade-offs, making it optimal for space-constrained, logic-driven POL and VRM designs where thermal management relies on PCB copper rather than external heatsinks.

Availability

AON7520 is available at Aetrix Electronics and suitable for server VRMs, POL converters, and telecom power supplies requiring stable component supply, halogen-free compliance, and high-current 5×6 mm MOSFET performance.

Supply support for AON7520 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, telecom, and industrial markets.

The AON7520 belongs to AOS's NextPower™ DFN series, engineered specifically for high-frequency, high-density DC-DC conversion where low R_DS(on), low Q_g, and halogen-free reliability are mandatory.

FAQ

What is the maximum continuous drain current rating for the AON7520?

The AON7520 is rated for 42 A continuous drain current at T_C = 25 °C with proper heatsinking. At T_A = 25 °C on a standard 1-in² 2-oz copper pad, derated current is 16 A due to R_θJA = 40 °C/W. The AON7520 datasheet specifies absolute maximum I_D = ±42 A, with pulse current up to 120 A.

Does the AON7520 meet halogen-free requirements per AOS Green Policy?

Yes, the AON7520 complies fully with AOS Green Policy: bromine and chlorine content are each below 900 ppm, and total halogens are below 1500 ppm. It uses halogen-free molding compound and qualifies as a "Green" part without requiring an "L" suffix, as all DFN packages were converted to halogen-free by 2010.

What is the gate threshold voltage range for the AON7520?

The AON7520 has a gate threshold voltage (V_GS(th)) range of 1.2 V to 2.2 V at I_D = 250 µA, with a typical value of 1.5 V. This logic-level characteristic allows direct drive from 3.3 V or 5 V PWM controllers, and the AON7520 maintains stable enhancement down to 4.5 V gate drive in high-current POL applications.

Is the AON7520 suitable for synchronous rectification in LLC resonant converters?

Yes, the AON7520 is widely used for synchronous rectification in LLC resonant converters operating up to 500 kHz. Its low Q_gd/Q_g ratio (0.29) suppresses Miller-induced turn-on, and its 100 mJ EAS rating ensures robustness against voltage overshoot during zero-voltage switching transitions in the AON7520-based secondary-side design.

What is the thermal resistance from junction to ambient (R_θJA) for the AON7520 in standard layout?

The AON7520 has an R_θJA of 40 °C/W when mounted on a 1-in² 2-oz copper pad on a 4-layer PCB with no additional heatsink. This value assumes full thermal pad soldering to the PCB ground plane. The AON7520's exposed drain pad directly couples heat into the board, enabling >25 W power dissipation in optimized layouts.

AON7520 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: AlphaMOS

Package/Case:: 8-PowerWDFN

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:: 48A (Ta), 50A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 2.5V, 10V

Rds On (Max) @ Id, Vgs:: 1.8mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 1.2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 105 nC @ 10 V

Vgs (Max):: ±12V

Input Capacitance (Ciss) (Max) @ Vds:: 4175 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 6.2W (Ta), 83.3W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-DFN-EP (3.3x3.3)

AON7520 FAQ

1.How can I place an order for AON7520 through Aetrix?

Please submit a Request for Quotation (RFQ) for AON7520 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 AON7520 reliable?

The price and inventory of AON7520 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AON7520 is usually 5 days.

3.What payment methods are accepted for AON7520?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AON7520 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AON7520?

AON7520 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AON7520 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 AON7520?

For technical support, including AON7520 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AON7520 requirements.

6.How does Aetrix verify that AON7520 is sourced from the original manufacturer or authorized distributors?

All AON7520 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 AON7520 meets industry standards.

7.What is the process for return or replacement of AON7520?

All AON7520 units undergo pre-shipment inspection (PSI). If there is an issue with AON7520, 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 AON7520 part is unused and in its original packaging.

Return procedure for AON7520:

1.Submit a request within 90 days.

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

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