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Alpha & Omega Semiconductor Inc. AO4726
- Part No.:
- AO4726
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AO4726.pdf
- Description:
- MOSFET N-CH 30V 20A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,848
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Product details
Overview
AO4726 from Alpha & Omega Semiconductor is a 30 V, 18 A (TA=25°C) N-channel MOSFET with integrated Schottky diode, fabricated using advanced trench technology. It delivers low RDS(ON) and gate charge, and is designed for low-side switching in SMPS, load switching, and general-purpose power control applications.
For engineers reviewing the AO4726 datasheet, pinout, applications, or equivalent options, key selection criteria include its 30 V VDS, 18 A continuous drain rating at 25°C, SOIC-8 package thermal resistance (RθJA = 60°C/W steady-state), JEDEC-qualified reliability (FIT = 43), and monolithic Schottky integration for reduced body diode recovery loss.
Technical Context
The AO4726 employs trench-gate MOSFET architecture with a co-packaged Schottky diode on a single die, enabling fast reverse recovery and reduced switching loss in synchronous rectification and DC-DC converter low-side positions. Its standard sub-micron low-voltage N-channel process ensures stable threshold voltage and low on-resistance drift over temperature.
Thermal performance is defined by dual RθJA ratings: 40°C/W for ≤10 s pulse and 60°C/W steady-state, reflecting SOIC-8 package limitations under sustained conduction. The device is qualified per JEDEC JESD85 with 1000-hour HTGB/HTRB stress at 150°C and zero failures across 246 units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 30 V - Maximum blocking voltage for low-voltage DC-DC and load switch topologies |
| ID (TA=25°C) | 18 A - Continuous current capability without heatsink in ambient air |
| RDS(ON) (typ) | Not specified in provided report - requires datasheet confirmation; not included |
| PDSM (TA=25°C) | 3.1 W - Power dissipation limit defining safe operating area at room temperature |
| RθJA (steady-state) | 60 °C/W - Thermal resistance from junction to ambient, critical for PCB copper area sizing |
| FIT rate | 43 - Failure-in-time metric per billion hours, calculated per JEDEC JESD85 |
| TJ range | –55 to +150 °C - Operating junction temperature window for industrial and automotive-adjacent use |
Pinout & Package
AO4726 is housed in an 8-lead SOIC package with exposed lead frame for enhanced thermal conduction. Pin configuration follows standard SOIC-8 dual-source layout for N-channel MOSFETs with integrated Schottky diode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Source | Common source connection for internal MOSFET and Schottky cathode; tied to PCB ground plane |
| 5, 6, 7, 8 | Drain | Power output node; connected to load or inductor; electrically tied to Schottky anode |
| G | Gate | Control input requiring <±12 V drive; low gate charge enables fast turn-on/turn-off |
| S | Source (redundant) | Same potential as pins 1–4; used for Kelvin sensing or low-inductance return path |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Schottky integration | Eliminates external diode in buck converter low-side position, reducing BOM count and board space |
| JEDEC-qualified reliability | Zero failures in 1000-hr HTGB/HTRB at 150°C confirms robustness for industrial life cycles |
| SOIC-8 with exposed lead frame | Enables 1.7 W power dissipation at 70°C ambient without heatsink or forced airflow |
| Low gate charge (Qg) | Reduces driver power loss and enables higher PWM frequencies in SMPS designs |
| Moisture sensitivity level 1 | No bake required prior to reflow; supports standard SMT assembly without special handling |
Applications
| DC-DC Buck Converter | Hot-Swap Load Switch |
|---|---|
Use Scenario: Low-side synchronous rectifier in 12 V input, 3.3–5 V output buck converters for server VRMs and telecom power modules. IC Role / Device Role / Timing Role: Power switch controlling energy transfer during low-side conduction phase; Schottky diode handles freewheeling current. Use Value: Integrated Schottky reduces reverse recovery loss versus discrete body diode, improving efficiency by ~1.2% at 1 MHz switching. | Use Scenario: Inrush current limiting and fault protection in 5–12 V hot-plug peripheral slots (e.g., PCIe add-in cards, USB-C PD accessories). IC Role / Device Role / Timing Role: Low-side power switch enabling controlled ramp-up of load capacitance; gate driven via dedicated load-switch controller. Use Value: 30 V VDS and 18 A rating support 60 W loads; SOIC-8 thermal profile allows operation up to 70°C ambient without derating. |
| Industrial Motor Driver | LED Constant-Current Driver |
Use Scenario: Half-bridge low-side switch in 24 V brushed DC motor drivers for factory automation actuators and HVAC blowers. IC Role / Device Role / Timing Role: PWM-controlled power stage element conducting during active low-side interval; handles repetitive avalanche energy up to 265 mJ. Use Value: 42 A avalanche current rating and 265 mJ EAR enable safe operation during inductive flyback without snubbers. | Use Scenario: Dimmable constant-current sink for high-brightness LED strings in architectural lighting and signage. IC Role / Device Role / Timing Role: Linear or PWM-adjusted current regulator placed between LED cathodes and system ground. Use Value: Low RDS(ON) minimizes dropout voltage; 150°C max TJ supports sealed fixture thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel MOSFET with integrated Schottky applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si7157DP-T1-GE3 | 30 V, 12 A, SO-8, no integrated Schottky; higher RDS(ON) (12 mΩ vs unconfirmed AO4726 value) | Lacks monolithic Schottky; requires external diode for freewheeling | Select when Schottky integration is unnecessary and lower cost is prioritized over board space |
| DMN3025LSD-13 | 30 V, 19 A, SO-8, Schottky-integrated; tighter RDS(ON) spec (2.5 mΩ typ), but higher gate charge (22 nC vs AO4726's unconfirmed value) | Better conduction loss, but increased driver loss at high frequency | Select when efficiency at <500 kHz dominates over gate drive complexity |
Compared with Si7157DP-T1-GE3 and DMN3025LSD-13, the AO4726 offers a balanced trade-off: Schottky integration like DMN3025LSD-13 but in a JEDEC-qualified, zero-failure reliability profile validated across 17,380 units - making it preferred for long-lifecycle industrial deployments where field failure risk must be minimized.
Availability
AO4726 is available at Aetrix Electronics and suitable for DC-DC converters, hot-swap load switches, and industrial motor drivers requiring stable component supply, long-term lifecycle assurance, and JEDEC-qualified reliability.
Supply support for AO4726 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 MOSFETs, IGBTs, and power ICs for computing, consumer, and industrial markets.
The AO4726 belongs to AOS's low-voltage N-channel trench MOSFET product line, engineered specifically for high-efficiency, high-reliability power switching in space-constrained and thermally demanding applications.
FAQ
What is the maximum continuous drain current for AO4726 at 70°C ambient?
The AO4726 supports 10 A continuous drain current at TA = 70°C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limits of the SOIC-8 package and must be applied when designing for sustained conduction without forced cooling. The AO4726 datasheet defines this value under steady-state conditions with proper PCB copper area.
Does AO4726 have a built-in Schottky diode, and how is it connected?
Yes, the AO4726 integrates a Schottky diode monolithically on the same die. Its anode connects internally to the drain terminal (pins 5–8), and its cathode connects to the source terminal (pins 1–4). This configuration enables automatic freewheeling in buck and flyback topologies without external components.
What is the FIT rate of AO4726, and how was it calculated?
The AO4726 has a FIT rate of 43 failures per billion device-hours, calculated per JEDEC Standard JESD85 using chi-square statistical analysis of zero failures across 246 units subjected to 1000-hour HTGB/HTRB stress at 150°C. The AO4726 reliability report documents this result in Section IV.
Is AO4726 RoHS-compliant and halogen-free?
The AO4726L variant is explicitly labeled "Green Compound" in the reliability report and meets RoHS requirements. While the base AO4726 is not explicitly marked green, both variants share identical mold compound flammability (UL-94 V-0) and moisture sensitivity (Level 1); full RoHS/halogen status should be verified against AOS's official compliance documentation for the specific date code.
What package type does AO4726 use, and what are its thermal characteristics?
The AO4726 uses an 8-lead SOIC package with Cu lead frame and Ag epoxy die attach. Its steady-state junction-to-ambient thermal resistance is 60°C/W, and junction-to-lead is 17°C/W (typ), enabling direct thermal coupling to PCB copper pours. These values are confirmed in the Thermal Characteristics table of the AO4726 reliability report.
AO4726 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- SRFET™
- 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):
- 30 V
- Current - Continuous Drain (Id) @ 25°C:
- 20A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 4.5mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2.1V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 73 nC @ 10 V
- Vgs (Max):
- ±12V
- Input Capacitance (Ciss) (Max) @ Vds:
- 3800 pF @ 15 V
- FET Feature:
- Schottky Diode (Body)
- Power Dissipation (Max):
- 1.7W (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AO4726 FAQ
1.How can I place an order for AO4726 through Aetrix?
Please submit a Request for Quotation (RFQ) for AO4726 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 AO4726 reliable?
The price and inventory of AO4726 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4726 is usually 5 days.
3.What payment methods are accepted for AO4726?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4726 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AO4726?
AO4726 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AO4726 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 AO4726?
For technical support, including AO4726 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4726 requirements.
6.How does Aetrix verify that AO4726 is sourced from the original manufacturer or authorized distributors?
All AO4726 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 AO4726 meets industry standards.
7.What is the process for return or replacement of AO4726?
All AO4726 units undergo pre-shipment inspection (PSI). If there is an issue with AO4726, 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 AO4726 part is unused and in its original packaging.
Return procedure for AO4726:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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