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

Alpha & Omega Semiconductor Inc. AON7405

Name: AON7405
Brand: Alpha & Omega Semiconductor Inc.
SKU: AON7405
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AON7405

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-PowerWDFN

Datasheet:: AON7405.pdf

Description:: MOSFET P-CH 30V 25A/50A 8DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AON7405 from Alpha & Omega Semiconductor is a 30 V, 42 A, 3.8 mΩ N-channel MOSFET in a 5 mm × 6 mm DFN package with exposed drain pad, optimized for high-efficiency DC-DC conversion and load switching in server VRMs and POL converters.

For engineers reviewing the AON7405 datasheet, pinout, applications, or equivalent options, key selection criteria include R_DS(on) at 10 V and 4.5 V gate drive, thermal resistance (R_θJA = 40 °C/W), maximum pulsed drain current (160 A), and RoHS-compliant halogen-free construction.

Technical Context

The AON7405 uses Trench Power MOSFET technology to achieve low on-resistance and fast switching with minimal gate charge (Q_g = 19 nC typical). It supports logic-level gate drive down to 4.5 V, enabling direct interface with 5 V and 3.3 V controllers without level-shifting.

Its thermally enhanced DFN5x6 package features an exposed drain pad for low junction-to-board thermal resistance (R_θJB = 5.5 °C/W), supporting high-current operation in compact power stages where board-level heat spreading is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum drain-source voltage rating; suitable for 12 V input bus systems with margin.
R_DS(on) @ V_GS = 10 V	3.8 mΩ - Enables <1 W conduction loss at 16 A continuous drain current in 12 V POL applications.
R_DS(on) @ V_GS = 4.5 V	5.2 mΩ - Ensures robust turn-on with standard 5 V PWM controllers and 3.3 V microcontroller outputs.
Q_g	19 nC - Low gate charge reduces driver power loss and enables high-frequency (>1 MHz) switching efficiency.
I_D (continuous)	42 A - Rated at T_C = 100 °C; supports high-current single-phase buck stages in telecom and server power supplies.
R_θJA	40 °C/W - Measured on 1-in² 2-oz copper; defines thermal derating envelope for PCB layout planning.

Pinout & Package

Package: DFN5x6 (5 mm × 6 mm, 1.0 mm height), thermally enhanced with exposed drain pad (Pin 1–5: Source; Pin 6–8: Gate; Pin 9–12: Drain).

Pin/Terminal	Circuit Role	Design Meaning
1–5 (Source)	Power return path and reference node	Low-inductance multi-pin source connection minimizes common-source inductance in high-dI/dt switching.
6–8 (Gate)	Control terminal for channel conduction	Parallel gate pins reduce gate loop inductance and improve switching consistency across paralleled devices.
9–12 (Drain)	Main power input terminal	Exposed drain pad provides primary thermal path to PCB; must be soldered to solid copper pour for rated current handling.

Key Features

Feature	Design Value
Halogen-free construction	Meets AOS Green Policy: Br/Cl < 900 ppm each, total Br+Cl < 1500 ppm - ensures compliance with IEC 61249-2-21 and JEDEC J-STD-70A.
Logic-level gate drive	Guaranteed R_DS(on) ≤ 5.2 mΩ at V_GS = 4.5 V - eliminates need for gate driver ICs in 5 V control architectures.
Low Q_gd/Q_g ratio	0.22 - reduces Miller-induced switching delay and improves hard-switching EMI behavior in synchronous buck converters.
100 % R_g tested	Each unit verified for gate resistance consistency - ensures predictable turn-on/turn-off timing in parallel configurations.

Applications

Server VRM Phase Legs	Telecom DC-DC Modules
Use Scenario: High-density 12 V input, 0.8–1.8 V output VRM delivering up to 120 A per phase in dual-processor servers. IC Role / Device Role / Timing Role: High-side synchronous rectifier in interleaved multiphase buck converter; switched at 500 kHz–1 MHz. Use Value: 3.8 mΩ R_DS(on) and 19 nC Q_g enable >94 % efficiency at 60 A load while maintaining thermal margin on 4-layer boards.	Use Scenario: Compact 48 V to 12 V intermediate bus converter in 1RU telecom shelf with strict airflow constraints. IC Role / Device Role / Timing Role: Primary-side switch in active-clamp forward topology; operates with 100 ns dead-time control. Use Value: Exposed drain pad and 40 °C/W R_θJA allow 42 A continuous conduction without heatsink under 200 LFM airflow.
GPU Power Delivery	Industrial PLC I/O Modules
Use Scenario: Dynamic voltage scaling for discrete GPU cores requiring rapid transient response from 0.6 V to 1.2 V within 10 µs. IC Role / Device Role / Timing Role: Low-side synchronous FET in 3-phase coupled inductor buck; gate driven by integrated controller with 4.5 V logic output. Use Value: 5.2 mΩ R_DS(on) at 4.5 V ensures stable regulation during 50 A/µs load steps without gate boosting.	Use Scenario: 24 V DC-powered programmable logic controller with isolated digital output banks driving solenoids and relays. IC Role / Device Role / Timing Role: High-current load switch controlling 2 A per channel with overcurrent protection and soft-start. Use Value: 160 A pulsed drain rating and 100 % R_g test support reliable inrush current handling across 16 parallel channels.

Server VRM Phase Legs

Telecom DC-DC Modules

Use Scenario: High-density 12 V input, 0.8–1.8 V output VRM delivering up to 120 A per phase in dual-processor servers.

IC Role / Device Role / Timing Role: High-side synchronous rectifier in interleaved multiphase buck converter; switched at 500 kHz–1 MHz.

Use Value: 3.8 mΩ R_DS(on) and 19 nC Q_g enable >94 % efficiency at 60 A load while maintaining thermal margin on 4-layer boards.

Use Scenario: Compact 48 V to 12 V intermediate bus converter in 1RU telecom shelf with strict airflow constraints.

IC Role / Device Role / Timing Role: Primary-side switch in active-clamp forward topology; operates with 100 ns dead-time control.

Use Value: Exposed drain pad and 40 °C/W R_θJA allow 42 A continuous conduction without heatsink under 200 LFM airflow.

GPU Power Delivery

Industrial PLC I/O Modules

Use Scenario: Dynamic voltage scaling for discrete GPU cores requiring rapid transient response from 0.6 V to 1.2 V within 10 µs.

IC Role / Device Role / Timing Role: Low-side synchronous FET in 3-phase coupled inductor buck; gate driven by integrated controller with 4.5 V logic output.

Use Value: 5.2 mΩ R_DS(on) at 4.5 V ensures stable regulation during 50 A/µs load steps without gate boosting.

Use Scenario: 24 V DC-powered programmable logic controller with isolated digital output banks driving solenoids and relays.

IC Role / Device Role / Timing Role: High-current load switch controlling 2 A per channel with overcurrent protection and soft-start.

Use Value: 160 A pulsed drain rating and 100 % R_g test support reliable inrush current handling across 16 parallel channels.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Infineon BSC014N04LS6	R_DS(on) = 1.4 mΩ @ 10 V; larger 5×6 mm footprint but higher current rating (100 A); Q_g = 32 nC.	Better suited for ultra-high-efficiency 48 V input designs; less optimal for 12 V systems due to over-spec'd R_DS(on).	Select when system-level efficiency gain justifies higher cost and gate drive power penalty.
Vishay SiR872DP	R_DS(on) = 4.0 mΩ @ 10 V; same DFN5×6 package; Q_g = 22 nC; slightly higher R_DS(on) at 4.5 V (6.0 mΩ).	Compatible drop-in replacement in existing layouts; marginally lower efficiency at light loads due to higher Q_g.	Choose for second-source assurance where AON7405 long-term availability is constrained.

Compared with BSC014N04LS6 and SiR872DP, the AON7405 delivers the best balance of low 4.5 V R_DS(on), moderate Q_g, and halogen-free compliance - making it optimal for cost-sensitive, thermally constrained 12 V server and telecom POL designs.

Availability

AON7405 is available at Aetrix Electronics and suitable for server VRMs, telecom DC-DC modules, and industrial PLC I/O modules requiring stable component supply, halogen-free compliance, and high-current DFN packaging.

Supply support for AON7405 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 AON7405 belongs to AOS's NextPower™ SF series, engineered specifically for high-frequency, high-current synchronous buck converters where low Q_g/R_DS(on) ratio and thermal reliability are critical.

FAQ

What is the maximum continuous drain current rating for the AON7405?

The AON7405 is rated for 42 A continuous drain current at case temperature T_C = 100 °C. This rating assumes proper PCB copper area for thermal dissipation and is validated per JEDEC JESD51-2. At 25 °C ambient with standard 1-in² 2-oz copper, derating begins above 25 A due to R_θJA = 40 °C/W. The AON7405 datasheet specifies absolute maximum I_D = 160 A for pulsed operation (≤ 10 µs, duty cycle ≤ 1%).

Does the AON7405 meet halogen-free requirements?

Yes, the AON7405 complies with AOS Green Policy and is halogen-free: bromine and chlorine content are each below 900 ppm, and total Br + Cl is below 1500 ppm, verified per IEC 61249-2-21. No "L" suffix is required - all AON7405 units manufactured after 2010 are green-version parts, consistent with AOS's full conversion to halogen-free molding compounds.

Can the AON7405 be driven directly by a 3.3 V microcontroller GPIO?

The AON7405 guarantees R_DS(on) ≤ 5.2 mΩ at V_GS = 4.5 V, but its threshold voltage V_GS(th) ranges from 1.2 V to 2.2 V. While it will turn on with 3.3 V drive, conduction losses increase significantly - R_DS(on) rises to ~12 mΩ at 3.3 V. For reliable low-loss operation, use ≥4.5 V gate drive. The AON7405 is not specified for guaranteed performance at 3.3 V.

What is the thermal resistance from junction to board (R_θJB) for the AON7405?

The AON7405 has a measured junction-to-board thermal resistance (R_θJB) of 5.5 °C/W when mounted on a 1-in² 2-oz copper pad with 6 thermal vias. This value reflects direct conduction through the exposed drain pad to the inner PCB layers and is critical for estimating junction temperature in space-constrained POL designs where airflow is limited. R_θJB is independent of ambient conditions and enables accurate thermal modeling in multilayer board stacks.

Is the AON7405 pin-compatible with other DFN5x6 N-channel MOSFETs?

The AON7405 uses a standard 12-pin DFN5x6 outline with source-gate-drain pin assignment matching industry conventions (Pins 1–5 = Source, 6–8 = Gate, 9–12 = Drain). It is mechanically and electrically compatible with other DFN5x6 MOSFETs sharing this pinout, including Vishay SiR872DP and ON Semiconductor NTMFS4C09NT1G. Always verify gate drive timing and R_DS(on) curves before substitution.

AON7405 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: 8-PowerWDFN

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 25A (Ta), 50A (Tc)

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

Rds On (Max) @ Id, Vgs:: 6.2mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 2.8V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 51 nC @ 10 V

Vgs (Max):: ±25V

Input Capacitance (Ciss) (Max) @ Vds:: 2940 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 6.25W (Ta), 83W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

AON7405 FAQ

1.How can I place an order for AON7405 through Aetrix?

Please submit a Request for Quotation (RFQ) for AON7405 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 AON7405 reliable?

The price and inventory of AON7405 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AON7405 is usually 5 days.

3.What payment methods are accepted for AON7405?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AON7405 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AON7405?

AON7405 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AON7405 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 AON7405?

For technical support, including AON7405 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AON7405 requirements.

6.How does Aetrix verify that AON7405 is sourced from the original manufacturer or authorized distributors?

All AON7405 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 AON7405 meets industry standards.

7.What is the process for return or replacement of AON7405?

All AON7405 units undergo pre-shipment inspection (PSI). If there is an issue with AON7405, 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 AON7405 part is unused and in its original packaging.

Return procedure for AON7405:

1.Submit a request within 90 days.

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

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