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Alpha & Omega Semiconductor Inc. AO4314
- Part No.:
- AO4314
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AO4314.pdf
- Description:
- MOSFET N-CH 36V 20A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,690
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Product details
Overview
AO4314 from Alpha & Omega Semiconductor is a 36V, 20A N-channel trench MOSFET in SOIC-8 package, optimized for high-frequency switching with RDS(ON) < 6 mΩ at VGS = 10 V and < 8.5 mΩ at 4.5 V. It features 100% UIS-tested ruggedness, Schottky-style soft-recovery body diode, and low Crss for minimized power loss in DC-DC converters and motor drives.
For engineers reviewing the AO4314 datasheet, pinout, applications, or equivalent options, key selection criteria include its 36V VDS, 20A continuous drain current at TA = 70°C, 18.6 nC total gate charge at 10 V, 1225 pF Ciss, and SOIC-8 thermal performance (RθJA = 60°C/W).
Technical Context
The AO4314 employs trench-gate MOSFET architecture to achieve ultra-low RDS(ON) and Crss synergy, enabling high-efficiency operation in synchronous buck converters and half-bridge topologies. Its gate threshold voltage (1.2–2.3 V) supports 4.5 V logic-level drive, while 100% Rg testing ensures consistent switching timing.
Dynamic behavior is stabilized by a soft-recovery body diode (trr = 12–18 ns, Qrr = 24–36 nC) and tightly controlled Qgd/Qgs ratio (3.2/2.8 nC), reducing voltage overshoot during hard switching. The device is rated for 150°C maximum junction temperature and qualified for consumer applications only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 36 V - Maximum blocking voltage compatible with 24 V input systems and 3.3/5 V control rails. |
| ID (continuous) | 20 A at TA = 70°C - Supports high-current output stages without forced air cooling. |
| RDS(ON) (VGS = 10 V) | < 6 mΩ - Reduces conduction loss to ≤2.4 W at 20 A, critical for thermally constrained PCBs. |
| RDS(ON) (VGS = 4.5 V) | < 8.5 mΩ - Enables direct interface with standard logic-level microcontrollers and PWM drivers. |
| Qg (10 V) | 14–23 nC - Determines gate driver power requirement and switching speed in 100–500 kHz designs. |
| Crss | 10–60 pF - Low reverse transfer capacitance minimizes Miller-induced shoot-through risk in bridge configurations. |
| trr | 12–18 ns - Fast body-diode recovery enables efficient synchronous rectification and reduces EMI. |
Pinout & Package
AO4314 is housed in a standard SOIC-8 surface-mount package with exposed drain pads on the bottom side for enhanced thermal dissipation. The package footprint matches JEDEC MS-012AC and supports reflow soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G (Pin 1) | Gate | Control terminal requiring ≤±20 V drive; 1.1 Ω typical gate resistance limits ringing. |
| S (Pins 2, 3, 4, 5) | Source | Common return path for load current; pins 2–5 internally bonded to reduce source inductance. |
| D (Pins 6, 7, 8, Tab) | Drain | Main power output node; tab and pins 6–8 are electrically connected for 3.5 W power handling at TA = 25°C. |
Key Features
| Feature | Design Value |
|---|---|
| Trench MOSFET technology | Enables <6 mΩ RDS(ON) at 10 V with sub-60 pF Crss for high-frequency efficiency. |
| 100% UIS tested | Guarantees unclamped inductive switching robustness up to 50 mJ, eliminating need for external snubbers. |
| Soft-recovery body diode | Reduces reverse recovery noise and voltage spikes in synchronous rectifiers and H-bridges. |
| 100% Rg tested | Ensures gate resistance between 0.5–1.6 Ω, enabling predictable turn-on/turn-off timing across production lots. |
| SOIC-8 thermal design | Exposed drain tab delivers RθJL = 12°C/W, supporting >4 W dissipation with minimal copper area. |
Applications
| DC-DC Synchronous Buck Converter | Brushed DC Motor Driver |
|---|---|
Use Scenario: High-efficiency 12–24 V input to 3.3/5/12 V output conversion in portable power supplies and embedded systems. IC Role / Device Role: High-side or low-side power switch managing 20 A peak load current with <6 mΩ conduction loss. Use Value: Achieves >95% efficiency at 300 kHz due to low RDS(ON) and Crss, reducing heatsink requirements. |
Use Scenario: Bidirectional 24 V brushed motor control in robotics, power tools, and automotive accessories. IC Role / Device Role: Half-bridge switch pair delivering 20 A continuous current with soft-recovery diode enabling regenerative braking. Use Value: Eliminates external freewheeling diodes and reduces EMI during direction reversal. |
| USB-C Power Delivery Sink | LED Constant-Current Driver |
Use Scenario: Inrush current limiting and overvoltage protection in 20 V/5 A USB PD 3.0 sink circuits. IC Role / Device Role: Low-side pass switch controlling power path with fast turn-off (tf = 3.5 ns) and avalanche-rated ruggedness. Use Value: Survives 36 V transients and 50 mJ single-pulse avalanche events without derating. |
Use Scenario: High-brightness LED string dimming in architectural lighting and automotive interior modules. IC Role / Device Role: PWM-controlled current sink switching at 1–20 kHz with <8.5 mΩ RDS(ON) at 4.5 V gate drive. Use Value: Enables direct MCU GPIO control without level-shifting, simplifying BOM and layout. |
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 | 30 V VDS, 15 A ID, RDS(ON) = 7.5 mΩ @ 10 V, TO-252 package | Lower voltage rating and higher RDS(ON); unsuitable for 36 V bus designs | Select when board space allows DPAK and system VDS ≤ 30 V. |
| DMN3025LSD-13 | 30 V VDS, 17 A ID, RDS(ON) = 2.5 mΩ @ 10 V, SOIC-8 with dual N-ch configuration | Lower voltage rating; dual-channel layout requires redesign; superior RDS(ON) but no 36 V margin | Choose for cost-sensitive 24 V half-bridge where dual FETs reduce component count. |
Compared with IRF7470PBF and DMN3025LSD-13, the AO4314 uniquely provides 36 V rating with SOIC-8 footprint and soft-recovery diode-critical for 24 V industrial DC-DC and motor control where voltage margin and EMI control are non-negotiable.
Availability
AO4314 is available at Aetrix Electronics and suitable for DC-DC converters, brushed motor drivers, USB-C power delivery sinks, and LED constant-current drivers requiring stable component supply and full traceability.
Supply support for AO4314 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 AO4314 belongs to AOS's TrenchMOS® family, engineered specifically for high-frequency, high-efficiency power switching in compact consumer-grade power systems.
FAQ
What is the maximum continuous drain current rating for the AO4314 at room temperature?
The AO4314 supports 219 A pulsed drain current under short-duration conditions, but its continuous drain current is rated at 20 A at TA = 70°C and derates to approximately 16 A at TA = 25°C with standard SOIC-8 PCB layout (1 in² 2 oz copper). This rating assumes proper thermal management and is validated per AOS's absolute maximum ratings table in the AO4314 datasheet.
Does the AO4314 have a built-in body diode, and what are its key recovery characteristics?
Yes, the AO4314 integrates a monolithic body diode with Schottky-style soft recovery behavior. Its reverse recovery time (trr) is 12–18 ns and reverse recovery charge (Qrr) is 24–36 nC at IF = 20 A and dI/dt = 500 A/µs. These values enable low-noise commutation in synchronous rectifier and half-bridge applications without external diodes.
Can the AO4314 be driven directly by a 3.3 V microcontroller GPIO pin?
No-the AO4314 has a gate threshold voltage range of 1.2–2.3 V but requires ≥4.5 V VGS to achieve its specified RDS(ON) < 8.5 mΩ. A 3.3 V drive yields significantly higher on-resistance and conduction loss; a level-shifting gate driver or logic-level-compatible MOSFET (e.g., AO3400) is recommended for 3.3 V control.
What is the thermal resistance from junction to ambient (RθJA) for the AO4314 in standard SOIC-8 mounting?
The AO4314 exhibits RθJA = 60°C/W when mounted on a 1 in² FR-4 board with 2 oz copper in still air at TA = 25°C. This value is measured per JEDEC JESD51-2 and assumes no additional heatsinking; actual thermal performance depends on PCB copper area, layer stack-up, and airflow.
Is the AO4314 suitable for automotive applications requiring AEC-Q101 qualification?
No-the AO4314 is explicitly designed and qualified for the consumer market only. Its datasheet states that applications in life support devices or automotive systems are unauthorized, and AOS does not assume liability for such use. For AEC-Q101-compliant alternatives, consult AOS's automotive-grade product portfolio (e.g., AON6254).
AO4314 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):
- 36 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:
- 6mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2.3V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 23 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1470 pF @ 18 V
- FET Feature:
- -
- Power Dissipation (Max):
- 4.2W (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AO4314 FAQ
1.How can I place an order for AO4314 through Aetrix?
Please submit a Request for Quotation (RFQ) for AO4314 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 AO4314 reliable?
The price and inventory of AO4314 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4314 is usually 5 days.
3.What payment methods are accepted for AO4314?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4314 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AO4314?
AO4314 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AO4314 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 AO4314?
For technical support, including AO4314 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4314 requirements.
6.How does Aetrix verify that AO4314 is sourced from the original manufacturer or authorized distributors?
All AO4314 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 AO4314 meets industry standards.
7.What is the process for return or replacement of AO4314?
All AO4314 units undergo pre-shipment inspection (PSI). If there is an issue with AO4314, 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 AO4314 part is unused and in its original packaging.
Return procedure for AO4314:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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