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Alpha & Omega Semiconductor Inc. AOB66620L
- Part No.:
- AOB66620L
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
AOB66620L.pdf
- Description:
- N
- Quantity:
- Payment:
- Shipping:
Inventory:3,014
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Product details
Overview
AOB66620L from Alpha & Omega Semiconductor is a 60V N-Channel Trench Power MOSFET in TO-263 package, rated for 57A continuous drain current at VGS=10V, with RDS(ON) < 8.5mΩ and gate charge Qg(10V) = 25nC. It delivers low conduction loss and fast switching for high-efficiency synchronous rectification in ATX and gaming power supplies.
For engineers reviewing the AOB66620L datasheet, pinout, applications, or equivalent options, key selection criteria include its 60V VDS, 57A ID, sub-8.5mΩ RDS(ON), 25nC total gate charge, and TO-263 thermal performance-critical for SMPS output stage design and high-current DC-DC conversion.
Technical Context
This MOSFET employs AlphaSGT™ technology to achieve optimized figure-of-merit (RDS(ON) × Qg) of ~212.5 mΩ·nC, enabling high-frequency operation with reduced switching losses. Its body diode exhibits trr = 18ns and Qrr = 58nC under IF=20A/di/dt=500A/μs conditions, supporting efficient hard-switched and synchronous rectifier topologies.
The device is 100% UIS tested and 100% Rg tested, with absolute maximum ratings including VDS = 60V, VGS = ±20V, and TJ = –55°C to 150°C. Thermal resistance RθJC = 2.5°C/W enables high-power dissipation when mounted on a heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 60V - Maximum blocking voltage for primary-side switching or secondary-side synchronous rectification in 48–54V input SMPS rails. |
| ID (VGS=10V) | 57A - Continuous drain current rating at 25°C case temperature; supports high-current output stages without parallel devices. |
| RDS(ON) (VGS=10V) | < 8.5mΩ - Low on-resistance minimizes conduction loss and junction heating in high-duty-cycle applications. |
| Qg(10V) | 25nC - Total gate charge determines drive strength requirement and switching speed; enables efficient 300–500kHz operation with standard gate drivers. |
| RθJC | 2.5°C/W - Junction-to-case thermal resistance allows up to 60W power dissipation at TC = 100°C, suitable for heatsink-mounted designs. |
| tr/tf | 8ns/5ns - Fast rise/fall times reduce switching transition losses and EMI generation in high-frequency converters. |
| VGS(th) | 2.4–3.6V - Gate threshold voltage ensures reliable turn-on with standard 3.3V or 5V logic-level gate drivers. |
Pinout & Package
AOB66620L uses the TO-263 (D²PAK) surface-mount package with exposed drain pad for enhanced thermal performance. The package has three terminals: Drain (D), Gate (G), and Source (S), with Drain connected to the large metal tab on the bottom side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D (Drain) | Main current-carrying terminal, tied to internal MOSFET drain region and exposed metal pad | Must be soldered to large copper pour or heatsink for thermal management; electrically connects to high-side or low-side switching node. |
| G (Gate) | Control terminal for channel formation | Requires low-impedance gate driver path; sensitive to ringing-layout must minimize loop inductance and avoid coupling to noisy nodes. |
| S (Source) | Reference terminal for gate drive and current return path | Serves as local ground reference for gate driver; must be routed with low inductance to prevent shoot-through during switching transitions. |
Key Features
| Feature | Design Value |
|---|---|
| AlphaSGT™ Trench Technology | Enables ultra-low RDS(ON) × Qg FOM (~212.5 mΩ·nC), improving efficiency in high-frequency SMPS designs. |
| 100% UIS Tested | Guarantees ruggedness against unclamped inductive switching events common in power supply startup, overload, or fault conditions. |
| Low Qrr Body Diode | 58nC reverse recovery charge reduces diode conduction loss and EMI during freewheeling in synchronous rectifiers. |
| RoHS & Halogen-Free | Complies with environmental regulations for industrial, computing, and consumer electronics manufacturing. |
| TO-263 Thermal Performance | RθJC = 2.5°C/W supports >60W continuous dissipation with proper heatsinking-ideal for compact, high-density power modules. |
Applications
| ATX Power Supplies | Gaming PSU Output Stage |
|---|---|
Use Scenario: Primary-side high-side switch and secondary-side synchronous rectifier in +12V and +5V rails of desktop PC power supplies. IC Role / Device Role / Timing Role: Power MOSFET performing high-current, high-frequency switching with precise timing control via PWM controller. Use Value: Sub-8.5mΩ RDS(ON) and 25nC Qg enable >90% efficiency at full load while maintaining thermal stability under sustained 50A+ output currents. |
Use Scenario: High-current synchronous rectification in multi-rail, high-transient gaming PSUs delivering up to 100A on +12V rail. IC Role / Device Role / Timing Role: Low-side switch in synchronous buck converter, driven by dedicated gate driver IC with tight dead-time control. Use Value: 100% UIS testing and 57A ID rating ensure reliability during rapid load transients and overcurrent events typical in GPU/CPU power delivery. |
| Server VRM Output Stage | Industrial DC-DC Converters |
Use Scenario: Final-stage power delivery in server voltage regulator modules supplying CPUs/FPGAs with tight regulation and fast transient response. IC Role / Device Role / Timing Role: Synchronous rectifier MOSFET operating at 300–600kHz with precise phase-aligned gate drive. Use Value: Low Qrr (58nC) and fast trr (18ns) minimize body-diode conduction loss and improve light-load efficiency in multiphase VRMs. |
Use Scenario: Isolated DC-DC converter secondary-side rectification in programmable logic controllers and motor drives requiring long-term reliability. IC Role / Device Role / Timing Role: High-reliability power switch handling continuous 40–55A loads with ambient temperatures up to 70°C. Use Value: –55°C to 150°C TJ range and 2.5°C/W RθJC support stable operation in sealed enclosures without forced air cooling. |
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 |
|---|---|---|---|
| IRF1404PbF | RDS(ON) = 4mΩ @ VGS=10V but Qg = 131nC; TO-220 package; higher gate charge increases drive loss. | Higher Qg limits usable frequency to ≤100kHz; less suitable for high-frequency SMPS where AOB66620L excels. | Select IRF1404PbF only if lower RDS(ON) is prioritized over switching speed and thermal density. |
| STP60NF06 | RDS(ON) = 12mΩ @ VGS=10V; Qg = 72nC; TO-220; lacks 100% UIS testing per datasheet. | Higher conduction loss and no UIS validation reduce suitability for high-reliability gaming or server PSUs. | Prefer AOB66620L for new designs requiring both low RDS(ON) and proven ruggedness in repetitive stress environments. |
Compared with IRF1404PbF and STP60NF06, AOB66620L offers superior switching efficiency (25nC vs. ≥72nC Qg) and verified UIS robustness, making it optimal for high-frequency, high-reliability synchronous rectification where thermal density and transient immunity are critical.
Availability
AOB66620L is available at Aetrix Electronics and suitable for ATX power supplies, gaming PSU output stages, and industrial DC-DC converters requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for AOB66620L 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 AOB66620L belongs to AOS' AlphaSGT™ N-Channel MOSFET product line, engineered specifically for high-efficiency, high-current synchronous rectification and switching applications in modern switched-mode power supplies.
FAQ
What is the maximum continuous drain current rating for AOB66620L?
The AOB66620L is rated for 57A continuous drain current at VGS = 10V and TC = 25°C. At elevated case temperatures, derating applies: 50A at TC = 70°C and 36A at TC = 100°C per the datasheet's thermal curves. This rating assumes proper PCB copper area and heatsinking to maintain RθJC = 2.5°C/W.
Does AOB66620L support logic-level gate drive?
Yes, AOB66620L supports logic-level gate drive with a gate threshold voltage (VGS(th)) ranging from 2.4V to 3.6V. It achieves RDS(ON) < 11mΩ at VGS = 8V, making it compatible with 3.3V and 5V microcontroller or gate driver outputs-no level-shifting required for most digital control interfaces.
Is AOB66620L suitable for synchronous rectification in 500kHz DC-DC converters?
Yes, AOB66620L is well-suited for synchronous rectification at 500kHz due to its low Qg (25nC), fast switching times (tr = 8ns, tf = 5ns), and low Ciss (1070pF). These parameters minimize switching loss and gate drive power, enabling high-efficiency operation in high-frequency buck and LLC secondary-side designs.
What is the avalanche energy rating of AOB66620L?
The AOB66620L is rated for 60mJ single-pulse avalanche energy (EAS) with L = 0.3mH at TJ = 25°C. This rating reflects its 100% UIS-tested ruggedness, ensuring reliable operation during inductive switching faults such as output short-circuit or startup overshoot in power supply applications.
How does the TO-263 package of AOB66620L compare thermally to TO-220 alternatives?
The TO-263 package of AOB66620L provides RθJC = 2.5°C/W, significantly better than typical TO-220 packages (RθJC ≈ 3.5–4.5°C/W). This 30–45% thermal improvement allows higher power density and reduced heatsink requirements-especially valuable in space-constrained ATX and gaming PSU layouts where board area is premium.
AOB66620L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- AlphaSGT™
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 60 V
- Current - Continuous Drain (Id) @ 25°C:
- 23A (Ta), 57A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 8V, 10V
- Rds On (Max) @ Id, Vgs:
- 8.5mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 3.6V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 25 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1070 pF @ 30 V
- FET Feature:
- -
- Power Dissipation (Max):
- 8.3W (Ta), 50W (Tc)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (D2PAK)
AOB66620L FAQ
1.How can I place an order for AOB66620L through Aetrix?
Please submit a Request for Quotation (RFQ) for AOB66620L 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 AOB66620L reliable?
The price and inventory of AOB66620L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOB66620L is usually 5 days.
3.What payment methods are accepted for AOB66620L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOB66620L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOB66620L?
AOB66620L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOB66620L 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 AOB66620L?
For technical support, including AOB66620L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOB66620L requirements.
6.How does Aetrix verify that AOB66620L is sourced from the original manufacturer or authorized distributors?
All AOB66620L 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 AOB66620L meets industry standards.
7.What is the process for return or replacement of AOB66620L?
All AOB66620L units undergo pre-shipment inspection (PSI). If there is an issue with AOB66620L, 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 AOB66620L part is unused and in its original packaging.
Return procedure for AOB66620L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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