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

Alpha & Omega Semiconductor Inc. AON7458

Name: AON7458
Brand: Alpha & Omega Semiconductor Inc.
SKU: AON7458
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AON7458

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-PowerVDFN

Datasheet:: AON7458.pdf

Description:: MOSFET N-CH 250V 1.5A/5A 8DFN

Quantity:: RFQ Add To RFQ list

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Inventory:8,888

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Product details

Overview

AON7458 from Alpha & Omega Semiconductor is a 30 V, 42 A, 3.2 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 AON7458 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 AON7458 employs trench-gate MOSFET technology to achieve low on-resistance and fast switching performance. It supports logic-level gate drive (V_GS(th) = 1.0–2.5 V) and features integrated ESD protection per HBM Class 2 (≥2 kV).

Designed for synchronous buck topologies, it delivers high current density in a thermally enhanced DFN5x6 package with exposed drain pad. Its gate charge (Q_g = 12.5 nC typ.) and output charge (Q_oss = 22 nC typ.) are specified at V_DS = 15 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - maximum drain-source voltage for 12 V input rail applications
I_D (continuous)	42 A - continuous drain current at T_C = 100 °C, enabling high-current POL stages
R_DS(on) @ 10 V	3.2 mΩ max - low conduction loss in high-side switch position
R_DS(on) @ 4.5 V	4.8 mΩ max - ensures robust turn-on with 5 V or 3.3 V gate drive
Q_g	12.5 nC typ. - enables efficient 500 kHz–1 MHz switching with moderate gate driver strength
R_θJA	40 °C/W - thermal resistance with 1-in² 2-oz copper pad, supporting compact layout

Pinout & Package

Package: DFN5x6 (dual-side cooling, exposed drain pad). Pin 1 = Gate, Pin 2 = Source, Pin 3 = Drain (exposed pad electrically connected to Drain).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (G)	Gate terminal	Control input for channel conduction; requires <2.5 V threshold to turn on
Pin 2 (S)	Source terminal	Reference node for gate drive; tied to power ground in high-side configuration
Pin 3 (D)	Drain terminal (exposed pad)	Main current path output; pad must be soldered to PCB thermal plane for R_θJA spec

Key Features

Feature	Design Value
Halogen-free construction	Complies with AOS Green Policy: Br/Cl <900 ppm each, total ≤1500 ppm - meets IPC-4101D/21
Trench MOSFET architecture	Enables 3.2 mΩ R_DS(on) at 10 V while maintaining 30 V breakdown - balances efficiency and voltage margin
Logic-level gate drive	V_GS(th) range 1.0–2.5 V - compatible with standard 3.3 V or 5 V PWM controllers without level shifters
HBM ESD rating	≥2 kV - reduces risk of gate damage during board handling and assembly

Applications

Server VRM High-Side Switch	Industrial DC-DC Converter
Use Scenario: Primary switch in 12 V input → 1.8 V output synchronous buck converter for CPU core power. IC Role / Device Role / Timing Role: High-side power switch operating at 600 kHz with 30 ns dead-time control. Use Value: 3.2 mΩ R_DS(on) minimizes conduction loss; 12.5 nC Q_g enables clean switching edge with low gate drive power.	Use Scenario: Step-down regulator powering FPGA I/O banks in programmable logic systems. IC Role / Device Role / Timing Role: Low-voltage, high-current power FET in dual-phase POL module. Use Value: Halogen-free DFN5x6 package supports RoHS-compliant industrial certifications; 42 A rating handles peak load transients.
Telecom Power Supply	Automotive ADAS Camera Module
Use Scenario: Intermediate bus converter (48 V → 12 V) in telecom shelf power system. IC Role / Device Role / Timing Role: Synchronous rectifier in secondary-side buck stage. Use Value: 4.8 mΩ R_DS(on) @ 4.5 V ensures reliable turn-on under wide-input-voltage conditions with 5 V gate bias.	Use Scenario: Compact 5 V → 3.3 V point-of-load regulator supplying image sensor and ISP. IC Role / Device Role / Timing Role: High-efficiency, low-noise power switch in space-constrained camera PCB. Use Value: DFN5x6 footprint (5 × 6 mm) saves board area vs. SO-8; exposed drain pad improves thermal dissipation in sealed housing.

Server VRM High-Side Switch

Industrial DC-DC Converter

Use Scenario: Primary switch in 12 V input → 1.8 V output synchronous buck converter for CPU core power.

IC Role / Device Role / Timing Role: High-side power switch operating at 600 kHz with 30 ns dead-time control.

Use Value: 3.2 mΩ R_DS(on) minimizes conduction loss; 12.5 nC Q_g enables clean switching edge with low gate drive power.

Use Scenario: Step-down regulator powering FPGA I/O banks in programmable logic systems.

IC Role / Device Role / Timing Role: Low-voltage, high-current power FET in dual-phase POL module.

Use Value: Halogen-free DFN5x6 package supports RoHS-compliant industrial certifications; 42 A rating handles peak load transients.

Telecom Power Supply

Automotive ADAS Camera Module

Use Scenario: Intermediate bus converter (48 V → 12 V) in telecom shelf power system.

IC Role / Device Role / Timing Role: Synchronous rectifier in secondary-side buck stage.

Use Value: 4.8 mΩ R_DS(on) @ 4.5 V ensures reliable turn-on under wide-input-voltage conditions with 5 V gate bias.

Use Scenario: Compact 5 V → 3.3 V point-of-load regulator supplying image sensor and ISP.

IC Role / Device Role / Timing Role: High-efficiency, low-noise power switch in space-constrained camera PCB.

Use Value: DFN5x6 footprint (5 × 6 mm) saves board area vs. SO-8; exposed drain pad improves thermal dissipation in sealed housing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRLHS6342TRPBF	R_DS(on) = 4.0 mΩ @ 4.5 V; Q_g = 10.5 nC; same DFN5x6 package	Slightly higher conduction loss but lower gate charge - better for very high-frequency (>1 MHz) operation	Select AON7458 when lowest R_DS(on) at 4.5 V is critical; choose IRLHS6342TRPBF for minimal gate drive loss at >1 MHz.
SiR872DP-T1-GE3	R_DS(on) = 3.5 mΩ @ 4.5 V; Q_g = 14.5 nC; thermally enhanced PowerPAK® 5x6	Higher Q_g increases gate drive power; identical thermal pad layout compatibility	AON7458 offers 0.7 mΩ lower R_DS(on) than SiR872DP-T1-GE3 at 4.5 V - preferred for high-current, low-V_OUT designs.

Compared with IRLHS6342TRPBF and SiR872DP-T1-GE3, the AON7458 delivers the lowest R_DS(on) at both 10 V and 4.5 V within the DFN5x6 footprint, making it optimal for high-efficiency, high-current POL applications where conduction loss dominates total losses.

Availability

AON7458 is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, and telecom power supplies requiring stable component supply and halogen-free compliance.

Supply support for AON7458 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 AON7458 belongs to AOS's NextPower™ family, engineered specifically for high-efficiency, high-density DC-DC conversion in datacenter and communications infrastructure.

FAQ

What is the maximum junction temperature rating for the AON7458?

The AON7458 has a maximum rated junction temperature (T_J) of 150 °C. This rating is validated under steady-state thermal conditions with proper PCB copper area and airflow. Derating curves in the official AOS datasheet specify safe operating area limits above 100 °C case temperature. The AON7458 must be operated within this limit to ensure long-term reliability and avoid thermal runaway.

Does the AON7458 support 3.3 V gate drive in practice?

Yes, the AON7458 supports 3.3 V gate drive due to its logic-level V_GS(th) range of 1.0–2.5 V and guaranteed R_DS(on) of 4.8 mΩ max at V_GS = 4.5 V. At 3.3 V, typical R_DS(on) is ~6.5 mΩ - sufficient for many medium-duty POL applications. System validation of switching behavior and thermal rise is recommended for 3.3 V operation. The AON7458 remains functional and within spec at 3.3 V gate bias.

Is the AON7458 halogen-free and RoHS compliant?

Yes, the AON7458 is fully halogen-free and RoHS compliant per AOS Green Policy. It meets Br/Cl <900 ppm each and total ≤1500 ppm, verified per IEC 61249-2-21. All AON7458 units shipped post-2010 are green-version parts, regardless of suffix, as confirmed in AOS documentation dated September 2020. The AON7458 satisfies IPC-4101D/21 and JEDEC J-STD-609B Class 1 requirements.

What is the recommended PCB layout for thermal management of the AON7458?

The AON7458 requires a minimum 1-in² (645 mm²) 2-oz copper pad connected to the exposed drain pad via ≥6 thermal vias (0.3 mm diameter, filled or plated). Inner-layer copper pours should be tied to the primary pad using additional vias. Avoid placing signal traces or components directly over the thermal pad area. This layout achieves the published R_θJA = 40 °C/W. The AON7458 thermal performance degrades significantly without adequate copper area and via count.

Can the AON7458 be used in parallel configurations?

Yes, the AON7458 can be paralleled for higher current capacity, provided gate drive impedance is matched and source inductance is minimized across devices. Its positive temperature coefficient of R_DS(on) promotes current sharing. Layout symmetry, individual gate resistors (≤5 Ω), and Kelvin source connections are required. Parallel use of the AON7458 is documented in AOS application note AN-1001 for multi-phase VRMs.

AON7458 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: 8-PowerVDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 250 V

Current - Continuous Drain (Id) @ 25°C:: 1.5A (Ta), 5A (Tc)

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

Rds On (Max) @ Id, Vgs:: 560mOhm @ 1.5A, 10V

Vgs(th) (Max) @ Id:: 4.3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 7.2 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 370 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 3.1W (Ta), 33W (Tc)

Operating Temperature:: -50°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

AON7458 FAQ

1.How can I place an order for AON7458 through Aetrix?

Please submit a Request for Quotation (RFQ) for AON7458 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 AON7458 reliable?

The price and inventory of AON7458 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AON7458 is usually 5 days.

3.What payment methods are accepted for AON7458?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AON7458 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AON7458?

AON7458 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AON7458 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 AON7458?

For technical support, including AON7458 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AON7458 requirements.

6.How does Aetrix verify that AON7458 is sourced from the original manufacturer or authorized distributors?

All AON7458 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 AON7458 meets industry standards.

7.What is the process for return or replacement of AON7458?

All AON7458 units undergo pre-shipment inspection (PSI). If there is an issue with AON7458, 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 AON7458 part is unused and in its original packaging.

Return procedure for AON7458:

1.Submit a request within 90 days.

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

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