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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Alpha & Omega Semiconductor Inc. AO4722

Name: AO4722
Brand: Alpha & Omega Semiconductor Inc.
SKU: AO4722
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AO4722

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AO4722.pdf

Description:: MOSFET N-CH 30V 8.5A 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AO4722 from Alpha & Omega Semiconductor is a 30V N-channel MOSFET with integrated Schottky diode, designed for low-side switching in SMPS and load-switching applications. It delivers R_DS(ON) < 14 mΩ at V_GS = 10 V, 11.6 A continuous drain current (T_A = 25°C), and 100% UIS-tested ruggedness.

For engineers reviewing the AO4722 datasheet, pinout, applications, or equivalent options, key selection considerations include its monolithic Schottky integration for soft-recovery operation, gate charge of 15.3 nC (10 V), and SOIC-8 thermal performance with R_θJA = 75 °C/W on standard FR-4.

Technical Context

The AO4722 employs advanced trench MOSFET technology with a co-packaged Schottky diode to enable fast, soft-recovery body-diode behavior-critical for reducing voltage spikes and EMI in synchronous buck converters. Its low Q_gd/Q_g ratio (3.9/20 nC) supports high-efficiency hard-switching at up to 1 MHz.

Thermal design is supported by dual-path junction-to-lead (R_θJL = 17 °C/W) and junction-to-ambient (R_θJA = 75 °C/W) metrics, validated per JEDEC JESD51-7 on 1-in² 2-oz copper FR-4. The device is rated for T_J = –55 to 150°C and qualified for consumer-market reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum blocking voltage compatible with 24 V input rails and transient margin in DC-DC converters.
I_D (T_A = 25°C)	11.6 A - Continuous conduction capability without derating on standard PCB layout.
R_DS(ON) (V_GS = 10 V)	<14 mΩ - Enables <1.7 W conduction loss at 11.6 A, supporting high-efficiency 12–24 V output stages.
Q_g (10 V)	15.3–20 nC - Low gate drive energy reduces controller loading and enables efficient 500 kHz–1 MHz operation.
t_r/t_f	9.2 ns / 4.4 ns - Fast switching transitions minimize overlap loss in synchronous rectification.
V_SD	0.43–0.5 V - Low forward drop of integrated Schottky diode reduces reverse-recovery losses vs. standard body diode.
Q_rr	30.0 nC - Quantified reverse-recovery charge confirms soft-recovery behavior under 300 A/µs dI/dt stress.

Pinout & Package

AO4722 is housed in a standard SOIC-8 package with exposed drain pad for enhanced thermal dissipation. Pin numbering follows JEDEC MS-012AC, with pins 1–4 and 5–8 forming two parallel source/drain/gate groups for low-inductance paralleling.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	Drain (D)	Common high-current drain node; internally connected to exposed thermal pad for low R_θJL.
5, 6, 7	Source (S)	Low-side return path; three pins reduce source inductance and improve gate-drive stability.
8	Gate (G)	Single-point gate input; low R_g (1.7–2.6 Ω) minimizes ringing and simplifies driver selection.

Key Features

Feature	Design Value
Integrated Schottky diode	Enables soft-recovery operation with t_rr = 17–20 ns and Q_rr = 30 nC-eliminates need for external diode in buck low-side position.
100% UIS tested	Guarantees ruggedness against unclamped inductive switching events up to 100% rated avalanche energy (E_AR = 2.0 mJ).
Low Q_gd/Q_g ratio	0.195 (3.9/20 nC) improves Miller immunity and allows stable operation with moderate gate resistance.
Monolithic trench process	Delivers R_DS(ON) < 22 mΩ at 4.5 V-supports 3.3 V and 5 V logic-level gate drive in battery-powered systems.

Applications

Server VRM Power Stage	USB-C PD Load Switch
Use Scenario: High-frequency synchronous buck converter supplying CPU core voltage (0.8–1.2 V @ up to 100 A). IC Role / Device Role / Timing Role: Low-side power switch with integrated Schottky diode handling freewheeling current during high-side FET off-time. Use Value: Soft recovery (Q_rr = 30 nC) reduces voltage overshoot and EMI, enabling smaller output capacitors and lower system cost.	Use Scenario: Inrush-limited 5–20 V load switching for USB-C power delivery ports with hot-plug detection. IC Role / Device Role / Timing Role: Single-FET load switch controlling power rail to downstream port controller and Type-C CC logic. Use Value: R_DS(ON) < 14 mΩ at 10 V ensures <100 mW conduction loss at 2 A, meeting USB-C thermal limits without heatsinking.
Industrial PLC I/O Module	LED Driver PWM Dimming Stage
Use Scenario: 24 V DC solid-state relay replacement for digital output channels driving solenoids or indicator lamps. IC Role / Device Role / Timing Role: Low-side switch interfacing microcontroller GPIO to inductive loads with integrated flyback path. Use Value: 100% UIS testing and E_AR = 2.0 mJ ensure reliable operation across 100,000+ switching cycles with inductive kickback suppression.	Use Scenario: High-duty-cycle PWM dimming stage for constant-current LED strings in architectural lighting. IC Role / Device Role / Timing Role: Synchronous rectifier in buck-based LED driver, conducting during freewheeling phase. Use Value: V_SD = 0.43–0.5 V and t_r/t_f < 10 ns minimize conduction and switching losses, improving driver efficiency above 95%.

Server VRM Power Stage

USB-C PD Load Switch

Use Scenario: High-frequency synchronous buck converter supplying CPU core voltage (0.8–1.2 V @ up to 100 A).

IC Role / Device Role / Timing Role: Low-side power switch with integrated Schottky diode handling freewheeling current during high-side FET off-time.

Use Value: Soft recovery (Q_rr = 30 nC) reduces voltage overshoot and EMI, enabling smaller output capacitors and lower system cost.

Use Scenario: Inrush-limited 5–20 V load switching for USB-C power delivery ports with hot-plug detection.

IC Role / Device Role / Timing Role: Single-FET load switch controlling power rail to downstream port controller and Type-C CC logic.

Use Value: R_DS(ON) < 14 mΩ at 10 V ensures <100 mW conduction loss at 2 A, meeting USB-C thermal limits without heatsinking.

Industrial PLC I/O Module

LED Driver PWM Dimming Stage

Use Scenario: 24 V DC solid-state relay replacement for digital output channels driving solenoids or indicator lamps.

IC Role / Device Role / Timing Role: Low-side switch interfacing microcontroller GPIO to inductive loads with integrated flyback path.

Use Value: 100% UIS testing and E_AR = 2.0 mJ ensure reliable operation across 100,000+ switching cycles with inductive kickback suppression.

Use Scenario: High-duty-cycle PWM dimming stage for constant-current LED strings in architectural lighting.

IC Role / Device Role / Timing Role: Synchronous rectifier in buck-based LED driver, conducting during freewheeling phase.

Use Value: V_SD = 0.43–0.5 V and t_r/t_f < 10 ns minimize conduction and switching losses, improving driver efficiency above 95%.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Infineon BSC014N04LS	R_DS(ON) = 1.4 mΩ @ 10 V (lower), but no integrated Schottky; SO-8 package.	Lacks soft-recovery capability; requires external diode for buck freewheeling.	Prefer when ultra-low R_DS(ON) dominates over diode integration and EMI control.
Vishay Si7850DP	R_DS(ON) = 15.5 mΩ @ 10 V (slightly higher); includes Schottky, but Q_g = 24 nC (higher).	Higher gate charge increases driver loss and limits max switching frequency vs. AO4722.	Acceptable where board space permits larger gate driver or lower f_SW is acceptable.

Compared with BSC014N04LS and Si7850DP, the AO4722 uniquely balances low R_DS(ON), integrated Schottky, and low Q_g-making it optimal for compact, high-frequency, low-EMI buck converters where diode integration eliminates layout complexity and improves reliability.

Availability

AO4722 is available at Aetrix Electronics and suitable for server VRM power stages, USB-C PD load switching, and industrial PLC I/O modules requiring stable component supply and consistent SOIC-8 sourcing.

Supply support for AO4722 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 AO4722 belongs to AOS's SRFET™ family-engineered specifically for soft-recovery, low-loss switching in high-frequency DC-DC converters and load-switching applications where integrated Schottky diodes replace discrete solutions.

FAQ

What is the maximum continuous drain current rating for AO4722 at 70°C ambient temperature?

The AO4722 supports 9.3 A continuous drain current at T_A = 70°C with standard SOIC-8 mounting on 1-in² 2-oz FR-4. This derating reflects its R_θJA = 75 °C/W thermal resistance and 150°C maximum junction temperature. The AO4722 datasheet specifies this value explicitly in the Absolute Maximum Ratings table under "Continuous Drain Current A" for T_A = 70°C.

Does AO4722 have a built-in Schottky diode, and how does it differ from the intrinsic body diode?

Yes, the AO4722 integrates a monolithic Schottky diode in parallel with the MOSFET's intrinsic body diode. Unlike the slow, high-Q_rr body diode, the Schottky provides soft recovery with t_rr = 17–20 ns and Q_rr = 30 nC. This feature is confirmed in the General Description and Electrical Characteristics sections of the AO4722 datasheet and enables reduced EMI and voltage overshoot in buck converters.

What is the gate threshold voltage range for AO4722, and is it compatible with 3.3 V logic-level drive?

The AO4722 has a gate threshold voltage (V_GS(th)) range of 1.3–2.5 V at T_J = 25°C, making it fully compatible with 3.3 V logic-level gate drive. At V_GS = 4.5 V, it achieves R_DS(ON) < 22 mΩ-verified in the Electrical Characteristics table. This ensures robust turn-on in battery-powered and low-voltage control systems using the AO4722.

Is AO4722 suitable for avalanche energy handling, and what is its rated repetitive avalanche energy?

Yes, the AO4722 is 100% UIS (unclamped inductive switching) tested and rated for repetitive avalanche energy (E_AR) of 2.0 mJ at T_J = 25°C with L = 0.3 mH. This rating is specified in the Absolute Maximum Ratings table and confirms suitability for inductive load switching in industrial controls where flyback energy must be safely absorbed without external snubbers.

What is the total gate charge of AO4722 at 10 V, and how does it impact switching efficiency?

The AO4722 has a total gate charge (Q_g) of 15.3–20 nC at V_GS = 10 V, measured under standard conditions (V_DS = 15 V, I_D = 11.6 A). This low Q_g reduces gate driver power loss and enables high-frequency operation up to 1 MHz while maintaining low switching losses-key for compact, high-efficiency power supplies using the AO4722.

AO4722 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:: 8.5A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 14mOhm @ 11.6A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 20 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1100 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

AO4722 FAQ

1.How can I place an order for AO4722 through Aetrix?

Please submit a Request for Quotation (RFQ) for AO4722 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 AO4722 reliable?

The price and inventory of AO4722 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4722 is usually 5 days.

3.What payment methods are accepted for AO4722?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4722 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AO4722?

AO4722 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AO4722 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 AO4722?

For technical support, including AO4722 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4722 requirements.

6.How does Aetrix verify that AO4722 is sourced from the original manufacturer or authorized distributors?

All AO4722 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 AO4722 meets industry standards.

7.What is the process for return or replacement of AO4722?

All AO4722 units undergo pre-shipment inspection (PSI). If there is an issue with AO4722, 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 AO4722 part is unused and in its original packaging.

Return procedure for AO4722:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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