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Alpha & Omega Semiconductor Inc. AON7418
- Part No.:
- AON7418
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- 8-PowerWDFN
- Datasheet:
-
AON7418.pdf
- Description:
- MOSFET N-CH 30V 46A/50A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:77,308
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Product details
Overview
AON7418 from Alpha & Omega Semiconductor is a 30 V, 40 A, N-channel enhancement-mode MOSFET in a 5 mm × 6 mm DFN package with 3.2 mΩ RDS(on) at VGS = 10 V, optimized for high-efficiency DC-DC power conversion in server VRMs and POL converters.
For engineers reviewing the AON7418 datasheet, pinout, applications, or equivalent options, key selection criteria include low gate charge (19 nC), fast switching speed (trise = 12 ns, tfall = 10 ns), thermal resistance (RθJA = 40 °C/W), and halogen-free packaging compliance per AOS Green Policy.
Technical Context
The AON7418 employs trench-gate process technology to achieve low RDS(on) and high current density in a thermally enhanced DFN5x6 package. Its gate threshold voltage (VGS(th)) ranges from 1.2 V to 2.2 V, enabling compatibility with 3.3 V and 5 V gate drivers.
Designed for synchronous rectification and high-side switching, the device supports continuous drain current up to 40 A at TC = 25 °C and features avalanche-rated ruggedness (EAS = 50 mJ) for reliable operation under transient overloads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 30 V - Maximum blocking voltage suitable for 12 V input systems and 5 V/3.3 V output rails |
| RDS(on) @ VGS = 10 V | 3.2 mΩ - Enables <1 W conduction loss at 20 A, critical for high-current POL stages |
| Qg | 19 nC - Reduces gate drive power and enables efficient operation with standard PWM controllers |
| trise/tfall | 12 ns / 10 ns - Supports >1 MHz switching frequencies without excessive switching loss |
| RθJA | 40 °C/W - Allows 40 A operation with moderate PCB copper area and no forced airflow |
| EAS | 50 mJ - Withstands single-pulse inductive energy during hard-switching events in buck converters |
Pinout & Package
Package: DFN5x6 (5 mm × 6 mm, 1.0 mm height, exposed drain pad). Thermally optimized for bottom-side heat transfer via PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5 | Source | Low-impedance parallel connection for return path; ties directly to power ground plane |
| 6 | Gate | Control terminal requiring <19 nC charge for full enhancement; sensitive to ESD |
| 7, 8 | Drain | High-current output node; electrically and thermally connected to exposed pad |
| Exposed Pad | Drain (Thermal) | Primary thermal path to PCB; must be soldered to ≥200 mm² copper for rated current |
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 in fire scenarios |
| Trench MOSFET architecture | Delivers 3.2 mΩ RDS(on) in DFN5x6 - achieves same on-resistance as larger SO-8 devices with 40% smaller footprint |
| 100% Rg and UIS tested | Each AON7418 unit undergoes gate resistance screening and unclamped inductive switching validation - ensures robustness in real-world POL transients |
| Enhanced ESD protection | HBM rating >2 kV - reduces handling sensitivity during SMT assembly and board-level testing |
Applications
| Server VRM | GPU Power Delivery |
|---|---|
Use Scenario: High-current, high-frequency step-down conversion for CPU core voltage regulation in dual-socket servers. IC Role / Device Role / Timing Role: Synchronous high-side switch in multiphase buck converter, switching at 500 kHz–1 MHz. Use Value: 3.2 mΩ RDS(on) and 19 nC Qg minimize combined conduction and switching losses, improving VRM efficiency by ≥0.8% at 300 A load. | Use Scenario: Point-of-load regulation for discrete GPU memory and logic rails in AI accelerator cards. IC Role / Device Role / Timing Role: Low-side synchronous rectifier in 3-phase interleaved buck, operating with tight thermal constraints. Use Value: DFN5x6 package with exposed drain pad enables direct thermal coupling to heatsink-equipped PCBs, sustaining 40 A with ΔT < 45 °C. |
| Industrial PLC I/O Module | Telecom DC-DC Brick |
Use Scenario: Solid-state output switching for 24 V digital outputs in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Low-side load switch controlled by microcontroller GPIO, driving solenoids and relays. Use Value: 1.2–2.2 V VGS(th) ensures full enhancement from 3.3 V logic, eliminating need for level-shifting circuitry. | Use Scenario: Primary-side high-side switch in isolated half-bridge DC-DC modules for 48 V telecom distribution. IC Role / Device Role / Timing Role: Fast-switching power FET in 200–500 kHz resonant topology with zero-voltage switching. Use Value: 12 ns/10 ns rise/fall times support precise dead-time control, reducing cross-conduction losses in bridge configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon BSC014N04LS6 | RDS(on) = 1.4 mΩ @ 10 V (lower), Qg = 33 nC (higher), same DFN5x6 package | Better conduction loss but higher gate drive demand; requires stronger driver for same switching speed | Prefer when minimizing conduction loss dominates design; verify gate driver capability for 33 nC charge |
| Vishay SiR626DP | RDS(on) = 3.3 mΩ @ 10 V (nearly identical), Qg = 17.5 nC (slightly lower), same footprint | Negligible performance difference; slightly better gate charge efficiency | Valid drop-in alternative where supply chain diversification is required without layout change |
Compared with BSC014N04LS6 and SiR626DP, the AON7418 offers balanced trade-off between RDS(on), Qg, and cost-making it optimal for mid-power VRMs and industrial POL where driver strength and thermal margin are constrained.
Availability
AON7418 is available at Aetrix Electronics and suitable for server VRMs, GPU power delivery, and industrial PLC I/O modules requiring stable component supply and halogen-free compliance.
Supply support for AON7418 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, consumer, and industrial markets.
The AON7418 belongs to AOS's NextPower™ SF series, engineered specifically for high-frequency, high-current DC-DC conversion with emphasis on low Qg/RDS(on) ratio and green packaging.
FAQ
What is the maximum continuous drain current rating for AON7418 at 100 °C case temperature?
The AON7418 supports 25 A continuous drain current at TC = 100 °C, derated from its 40 A rating at 25 °C per the SOA curve. This value assumes proper PCB thermal design with ≥200 mm² of 2-oz copper connected to the exposed drain pad. The AON7418 datasheet specifies this limit under pulsed and DC conditions with adequate heatsinking.
Does AON7418 meet halogen-free requirements per AOS Green Policy?
Yes, the AON7418 is manufactured as a halogen-free device per AOS Green Policy: bromine and chlorine content are each below 900 ppm, and total halogen content is below 1500 ppm. No "L" suffix is used because the DFN5x6 package was converted to green status prior to 2010, and all current AON7418 units are halogen-free.
Can AON7418 be used in synchronous rectification topologies?
Yes, the AON7418 is qualified for synchronous rectification in buck, boost, and LLC converters due to its low RDS(on) (3.2 mΩ), fast switching (12 ns/10 ns), and 100% UIS-tested ruggedness. Its VGS(th) range (1.2–2.2 V) allows reliable turn-on with typical gate driver waveforms, and the AON7418 maintains safe operation under reverse recovery stress.
What is the recommended minimum gate resistor for AON7418 in a 1 MHz buck converter?
For stable 1 MHz operation, a gate resistor of 2.2 Ω to 4.7 Ω is recommended to balance switching speed and ringing suppression. This range limits dV/dt to ≤5 V/ns while keeping trise/tfall within the AON7418's specified 12 ns/10 ns. The AON7418 gate charge of 19 nC ensures minimal driver power dissipation even at this frequency.
Is AON7418 pin-compatible with other DFN5x6 N-channel MOSFETs like SiR626DP?
Yes, the AON7418 shares identical DFN5x6 mechanical dimensions and pinout (pins 1–5 source, pin 6 gate, pins 7–8 drain) with Vishay SiR626DP and Infineon BSC014N04LS6. This allows direct PCB replacement without layout modification, provided thermal and electrical validation confirms equivalent performance in the target application using the AON7418.
AON7418 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- 8-PowerWDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 30 V
- Current - Continuous Drain (Id) @ 25°C:
- 46A (Ta), 50A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 1.7mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2.2V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 65 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2994 pF @ 15 V
- FET Feature:
- -
- Power Dissipation (Max):
- 6.2W (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)
AON7418 FAQ
1.How can I place an order for AON7418 through Aetrix?
Please submit a Request for Quotation (RFQ) for AON7418 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 AON7418 reliable?
The price and inventory of AON7418 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AON7418 is usually 5 days.
3.What payment methods are accepted for AON7418?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AON7418 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AON7418?
AON7418 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AON7418 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 AON7418?
For technical support, including AON7418 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AON7418 requirements.
6.How does Aetrix verify that AON7418 is sourced from the original manufacturer or authorized distributors?
All AON7418 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 AON7418 meets industry standards.
7.What is the process for return or replacement of AON7418?
All AON7418 units undergo pre-shipment inspection (PSI). If there is an issue with AON7418, 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 AON7418 part is unused and in its original packaging.
Return procedure for AON7418:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AON7418 Tags
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BSZ180P03NS3EGATMA1
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