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Alpha & Omega Semiconductor Inc. AO4442L
- Part No.:
- AO4442L
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AO4442L.pdf
- Description:
- MOSFET N-CHANNEL 75V 3.1A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:7,905
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Product details
Overview
AO4442L from Alpha & Omega Semiconductor is a 30V, 11A N-channel enhancement-mode MOSFET in SO-8 package, featuring 15mΩ RDS(on) at VGS = 10V, 27mΩ at 4.5V, and 100% EAS-rated for robustness in switching applications such as DC-DC converters and load switches.
For engineers reviewing the AO4442L datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (16nC), fast turn-on/turn-off times (12ns/25ns), SO-8 thermal performance, and halogen-free green compliance per AOS policy effective 2010.
Technical Context
This MOSFET uses trench-gate process technology to achieve low on-resistance and high efficiency in synchronous rectification and power management circuits. It supports logic-level gate drive with threshold voltage of 1.0–2.5V and operates reliably across -55°C to +150°C junction temperature range.
The device integrates 100% avalanche energy testing (EAS = 39mJ) and meets JEDEC JESD47 reliability standards. Its SO-8 package enables surface-mount assembly with thermal resistance RθJA = 50°C/W under standard PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 30V - maximum drain-source blocking voltage for 12V rail switching |
| RDS(on) @ VGS=10V | 15mΩ - enables <1.5W conduction loss at 11A continuous current |
| RDS(on) @ VGS=4.5V | 27mΩ - supports direct logic-level drive from 3.3V/5V microcontrollers |
| Qg | 16nC - reduces gate driver power demand and switching losses |
| ton/toff | 12ns/25ns - allows >1MHz operation in high-frequency SMPS designs |
| EAS | 39mJ - guarantees single-pulse avalanche survivability without derating |
Pinout & Package
AO4442L is housed in a standard SO-8 surface-mount package with exposed drain pad for enhanced thermal dissipation. The package complies with RoHS and AOS Green Policy (halogen-free, <900ppm Br/Cl, <1500ppm total halogens).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Source | Common source connection for dual-MOSFET configuration; tied internally in SO-8 layout |
| 5, 6, 7, 8 | Drain | High-current output path; connected to exposed pad for thermal conduction |
| G | Gate | Control terminal requiring ≤2.5V VGS(th); sensitive to ESD (HBM 1.5kV) |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free green construction | Meets AOS Green Policy: Br/Cl <900ppm each, total halogens <1500ppm - eliminates corrosive decomposition byproducts |
| 100% EAS rated | 39mJ single-pulse avalanche energy - enables reliable operation under inductive switching stress without external snubbers |
| Low Qg and Qgd | 16nC total gate charge, 5.5nC gate-to-drain charge - minimizes Miller effect and improves switching controllability |
| Logic-level compatible | VGS(th) = 1.0–2.5V - allows direct interface with 3.3V FPGA I/O or MCU GPIO without level-shifting |
Applications
| DC-DC Synchronous Buck Converter | Hot-Swap Load Switch |
|---|---|
Use Scenario: High-efficiency 12V-to-3.3V conversion in server VRMs and telecom power supplies. IC Role / Device Role / Timing Role: Low-side synchronous rectifier replacing Schottky diode to reduce conduction loss and improve thermal margin. Use Value: 27mΩ RDS(on) at 4.5V enables >92% efficiency at 10A load with minimal heatsinking. | Use Scenario: Controlled inrush current management during board insertion into live backplanes. IC Role / Device Role / Timing Role: Main pass element in soft-start enabled load switch IC or discrete control circuit. Use Value: 100% EAS rating ensures survival during repeated hot-plug transients up to 39mJ. |
| USB Power Delivery Switch | Industrial PLC Output Stage |
Use Scenario: Bidirectional 5V/20V power path control in USB-C PD sink/source negotiation. IC Role / Device Role / Timing Role: High-side or low-side switch enabling/disabling VBUS under firmware control. Use Value: 15mΩ RDS(on) limits voltage drop to <150mV at 10A, preserving PD specification compliance. | Use Scenario: 24V DC output driving solenoids, relays, or indicator LEDs in factory automation modules. IC Role / Device Role / Timing Role: Final-stage power switch controlled by isolated digital outputs (e.g., optocoupler-driven gate). Use Value: SO-8 package supports IPC-7351B footprint reuse; halogen-free construction meets industrial environmental compliance. |
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 | RDS(on) = 20mΩ @ 10V; higher Qg (22nC); TO-252 package | Larger footprint; higher thermal resistance (RθJA = 62°C/W) | Choose IRF7470PBF only if SO-8 mounting is unavailable and higher RDS(on) is acceptable. |
| Si2302DS-T1-E3 | RDS(on) = 45mΩ @ 4.5V; SOT-23 package; lower current rating (3.2A) | Not suitable for >5A continuous loads; limited avalanche capability | Select Si2302DS-T1-E3 only for space-constrained low-power logic-level switching where 11A rating is unnecessary. |
Compared with IRF7470PBF and Si2302DS-T1-E3, AO4442L delivers superior power density in SO-8, tighter gate threshold distribution, and verified halogen-free compliance - making it optimal for high-reliability, thermally constrained, and environmentally regulated designs.
Availability
AO4442L is available at Aetrix Electronics and suitable for DC-DC converters, hot-swap controllers, and industrial I/O modules requiring stable component supply, long-term lifecycle support, and halogen-free material compliance.
Supply support for AO4442L 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 AO4442L belongs to AOS's Green TrenchMOS™ family, engineered specifically for high-efficiency, low-voltage switching applications where halogen-free compliance and avalanche ruggedness are mandatory.
FAQ
What is the maximum continuous drain current rating for AO4442L?
The AO4442L is rated for 11A continuous drain current (ID) at TA = 25°C with SO-8 mounted on 1-in² FR4 PCB with 2oz copper. Derating applies above 25°C ambient; full 11A operation requires adequate copper pour and airflow per AOS AN-1001 layout guidelines. The AO4442L datasheet specifies this value under standard JEDEC test conditions.
Does AO4442L support logic-level gate drive?
Yes, AO4442L supports logic-level gate drive with guaranteed VGS(th) between 1.0V and 2.5V, enabling direct interface with 3.3V or 5V microcontroller GPIOs. At VGS = 4.5V, it achieves 27mΩ RDS(on), making AO4442L suitable for battery-powered and low-voltage control systems without external level shifters.
Is AO4442L halogen-free and RoHS compliant?
Yes, AO4442L is fully halogen-free per AOS Green Policy (Br/Cl <900ppm each, total halogens <1500ppm) and RoHS compliant. The "L" suffix explicitly identifies this green version, and all AO4442L units manufactured after 2010 meet these requirements. AO4442L documentation confirms compliance with EU Directive 2011/65/EU and IEC 61249-2-21.
What is the avalanche energy rating of AO4442L?
The AO4442L is 100% tested for single-pulse avalanche energy (EAS) with a minimum rating of 39mJ at TJ = 25°C. This rating is measured per JEDEC JESD24-1 and ensures robustness against inductive switching transients in motor drives and power supplies. AO4442L's EAS performance is validated across production lots.
Can AO4442L be used in parallel configurations?
Yes, AO4442L supports paralleling due to its positive temperature coefficient of RDS(on), which promotes current sharing. For stable operation, match gate resistors and ensure symmetrical PCB layout and thermal coupling. AO4442L's low gate charge (16nC) simplifies gate drive design in multi-device configurations.
AO4442L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 75 V
- Current - Continuous Drain (Id) @ 25°C:
- 3.1A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 130mOhm @ 3.1A, 10V
- Vgs(th) (Max) @ Id:
- 3V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 3.5 nC @ 4.5 V
- Vgs (Max):
- ±25V
- Input Capacitance (Ciss) (Max) @ Vds:
- 350 pF @ 37.5 V
- FET Feature:
- -
- Power Dissipation (Max):
- 3.1W (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AO4442L FAQ
1.How can I place an order for AO4442L through Aetrix?
Please submit a Request for Quotation (RFQ) for AO4442L 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 AO4442L reliable?
The price and inventory of AO4442L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4442L is usually 5 days.
3.What payment methods are accepted for AO4442L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4442L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AO4442L?
AO4442L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AO4442L 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 AO4442L?
For technical support, including AO4442L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4442L requirements.
6.How does Aetrix verify that AO4442L is sourced from the original manufacturer or authorized distributors?
All AO4442L 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 AO4442L meets industry standards.
7.What is the process for return or replacement of AO4442L?
All AO4442L units undergo pre-shipment inspection (PSI). If there is an issue with AO4442L, 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 AO4442L part is unused and in its original packaging.
Return procedure for AO4442L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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