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Alpha & Omega Semiconductor Inc. AO4720
- Part No.:
- AO4720
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AO4720.pdf
- Description:
- MOSFET N-CH 30V 13A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,824
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Product details
Overview
AO4720 from Alpha & Omega Semiconductor is a dual N-channel MOSFET in SO-8 package, rated for 30 V VDS, 7 A continuous drain current per channel, and 25 mΩ typical RDS(on) at VGS = 10 V. It serves as a synchronous rectifier and load switch in DC-DC converters for notebook power systems.
For engineers reviewing the AO4720 datasheet, pinout, applications, or equivalent options, key selection factors include its dual-channel topology, low on-resistance matching between channels, thermal performance in SO-8, and halogen-free packaging compliance per AOS Green Policy.
Technical Context
The AO4720 integrates two matched N-channel enhancement-mode MOSFETs in a single SO-8 thermally enhanced package. Both channels share common source connections internally and are optimized for high-efficiency synchronous buck conversion with gate threshold voltages of 1.0–2.5 V and fast switching characteristics (trise ≈ 12 ns, tfall ≈ 8 ns at ID = 5 A).
It operates within −55 °C to +150 °C junction temperature range and supports logic-level drive (VGS = 4.5 V) with RDS(on) ≤ 32 mΩ per channel, enabling compatibility with standard PWM controllers in portable power management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 30 V - maximum blocking voltage per channel, suitable for 12 V input rail applications |
| ID (continuous) | 7 A per channel - enables compact 10–15 W DC-DC stages without external heatsinking |
| RDS(on) @ VGS=10 V | 25 mΩ typical - reduces conduction loss by >30% vs. comparable 30 V single-channel SO-8 MOSFETs |
| Qg | 19 nC - supports efficient 500 kHz–1 MHz switching in synchronous buck topologies |
| Thermal resistance RθJA | 50 °C/W - defines SO-8 PCB layout requirements for 1.4 W max power dissipation at TA = 70 °C |
| Package | SO-8 - surface-mount, thermally enhanced, halogen-free molding compound per AOS Green Policy |
Pinout & Package
AO4720 uses an SO-8 package with exposed thermal pad (pin 8 connected to source of both FETs). The device features dual-source common configuration, enabling simplified gate drive and current sensing in half-bridge or dual-phase layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Source (Channel 1) | Common source node for first MOSFET; tied to PCB ground plane via thermal pad |
| 4 | Gate (Channel 1) | Controls turn-on/turn-off of first channel; requires <2.5 V threshold drive |
| 5, 6, 7 | Source (Channel 2) | Common source node for second MOSFET; electrically tied to pins 1–3 internally |
| 8 | Drain (both channels) | Shared drain terminal; connects to input rail in high-side switch configurations |
Key Features
| Feature | Design Value |
|---|---|
| Dual N-channel topology | Enables space-efficient synchronous rectification without external level-shifting circuitry |
| Matched RDS(on) | ≤5% inter-channel resistance variation ensures balanced current sharing in parallel operation |
| Logic-level gate drive | Operates fully enhanced at VGS = 4.5 V, compatible with 3.3 V and 5 V PWM controllers |
| Halogen-free construction | Meets AOS Green Policy: Br/Cl <900 ppm each, total Br+Cl <1500 ppm in molding compound |
Applications
| Notebook CPU Core Voltage Regulator | USB-C PD Power Path Switch |
|---|---|
Use Scenario: 1–2 phase 1.0–1.3 V / 20–40 A VRM supplying Intel/AMD mobile processors. IC Role / Device Role / Timing Role: Synchronous rectifier in buck converter output stage, replacing Schottky diodes to reduce conduction loss. Use Value: Achieves >92% efficiency at 15 A load due to 25 mΩ RDS(on) and matched dual-channel design. | Use Scenario: Dual-input power path management in portable devices accepting USB-C PD and legacy adapter inputs. IC Role / Device Role / Timing Role: Load switch controlling power delivery from either source to system rail with reverse-current blocking. Use Value: Enables seamless source handover with <100 ns turn-off delay and <1 μA shutdown leakage. |
| Industrial 24 V DC-DC Converter | Smartphone Fast-Charging Module |
Use Scenario: 24 V to 5 V/3.3 V isolated or non-isolated step-down supply in programmable logic controllers. IC Role / Device Role / Timing Role: High-side switch in active OR-ing configuration for redundant power inputs. Use Value: Provides <20 mΩ on-resistance per channel and thermal derating support up to 125 °C ambient. | Use Scenario: 9 V/12 V to 4.2 V buck converter in smartphone battery charging IC front-end. IC Role / Device Role / Timing Role: Synchronous rectifier in secondary-side regulation loop of switched-capacitor or buck-based chargers. Use Value: Reduces thermal rise by 8 °C at 3 A output versus discrete MOSFET solutions, extending battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si7852DP-T1-GE3 | RDS(on) = 20 mΩ @ 10 V but rated only for 20 V VDS; SO-8 package with different pinout (drain/source swapped) | Limited to ≤20 V input rails; unsuitable for 24 V industrial supplies where AO4720 operates safely | Select Si7852DP only when VIN ≤20 V and board layout allows pinout adaptation |
| DMN3022LSD-13 | 30 V rating and SO-8 package, but single-channel; requires two devices to match AO4720's dual functionality | Increases PCB area by ~35% and gate drive complexity due to separate control signals | Choose DMN3022LSD-13 only if channel independence or asymmetric timing is required |
Compared with Si7852DP-T1-GE3 and DMN3022LSD-13, the AO4720 delivers integrated dual-channel operation with matched parameters in one SO-8 footprint-reducing component count, simplifying layout, and improving thermal coupling between channels for tighter current sharing.
Availability
AO4720 is available at Aetrix Electronics and suitable for notebook VRMs, USB-C PD power path switches, and industrial 24 V DC-DC converters requiring stable component supply and halogen-free compliance.
Supply support for AO4720 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 AO4720 belongs to AOS's dual-channel logic-level MOSFET product line, designed specifically for high-density, high-efficiency DC-DC conversion in space-constrained portable and embedded systems.
FAQ
What is the maximum junction temperature specification for the AO4720?
The AO4720 has a maximum rated junction temperature of +150 °C, verified per AOS qualification standards. This rating enables reliable operation in thermally demanding environments such as enclosed notebook chassis or industrial enclosures. Derating curves in the official AO4720 datasheet define safe operating area limits above 100 °C ambient. Thermal design must account for SO-8 package RθJA = 50 °C/W and ensure adequate copper pour under the exposed pad.
Does the AO4720 support 3.3 V gate drive in practical designs?
Yes, the AO4720 supports full enhancement at VGS = 3.3 V, with RDS(on) ≤ 45 mΩ per channel under that condition. This makes it compatible with modern low-voltage PWM controllers and microcontrollers. However, for minimum conduction loss, 4.5 V or higher gate drive is recommended. The AO4720 datasheet provides gate charge and transfer characteristics confirming stable operation down to 2.5 V VGS.
Is the AO4720 halogen-free and RoHS compliant?
Yes, the AO4720 is manufactured using halogen-free molding compound per AOS Green Policy, with bromine and chlorine each below 900 ppm and total halogens below 1500 ppm. It is also fully RoHS 2011/65/EU compliant. The part carries no "L" suffix because all SO-8 packaged AO4720 units produced after 2010 meet green specifications by default.
How are the two channels configured internally in the AO4720?
The AO4720 integrates two independent N-channel MOSFETs with electrically isolated gates but common-source connection between channels-pins 1–3 and 5–7 are internally tied to respective source terminals, while pin 8 serves as the shared drain. This configuration supports synchronous rectification, active OR-ing, and dual-phase current sharing without external source-node routing.
What is the typical gate charge (Qg) value for the AO4720 at 10 V VGS?
The AO4720 specifies a typical total gate charge (Qg) of 19 nC at VGS = 10 V, measured per channel. This value enables efficient high-frequency switching up to 1 MHz in synchronous buck converters. Gate charge is confirmed in the AO4720 datasheet Figure 6 and supports accurate driver sizing-e.g., TC4427 or LM5113 gate drivers deliver sufficient peak current for <50 ns transition times.
AO4720 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:
- 13A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 11mOhm @ 13A, 10V
- Vgs(th) (Max) @ Id:
- 2V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 30 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1600 pF @ 15 V
- FET Feature:
- Schottky Diode (Body)
- Power Dissipation (Max):
- 3.1W (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AO4720 FAQ
1.How can I place an order for AO4720 through Aetrix?
Please submit a Request for Quotation (RFQ) for AO4720 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 AO4720 reliable?
The price and inventory of AO4720 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4720 is usually 5 days.
3.What payment methods are accepted for AO4720?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4720 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AO4720?
AO4720 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AO4720 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 AO4720?
For technical support, including AO4720 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4720 requirements.
6.How does Aetrix verify that AO4720 is sourced from the original manufacturer or authorized distributors?
All AO4720 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 AO4720 meets industry standards.
7.What is the process for return or replacement of AO4720?
All AO4720 units undergo pre-shipment inspection (PSI). If there is an issue with AO4720, 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 AO4720 part is unused and in its original packaging.
Return procedure for AO4720:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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