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

Alpha & Omega Semiconductor Inc. AO4474

Name: AO4474
Brand: Alpha & Omega Semiconductor Inc.
SKU: AO4474
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AO4474

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

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

Datasheet:: AO4474.pdf

Description:: MOSFET N-CH 30V 13.4A 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AO4474 from Alpha & Omega Semiconductor is a 30V N-Channel MOSFET in SOIC-8 package, designed as a high-side switch for SMPS and general-purpose power switching. It delivers 13.4A continuous drain current at V_GS = 10V, R_DS(ON) < 11.5 mΩ (V_GS = 10V), and features 100% UIS and R_g testing for robustness in DC-DC converters.

For engineers reviewing the AO4474 datasheet, pinout, applications, or equivalent options, key selection criteria include its trench-based low-R_DS(ON) performance, 42A avalanche current rating, 100% UIS qualification, thermal resistance (R_θJA = 34°C/W), and SOIC-8 footprint compatibility with industrial and consumer power stages.

Technical Context

The AO4474 employs advanced trench MOSFET technology to achieve low on-resistance and gate charge-Q_g(10V) = 22–28 nC and Q_g(4.5V) = 10–13 nC-enabling efficient high-frequency switching in synchronous buck converters. Its body diode exhibits t_rr = 36–45 ns and Q_rr = 47 nC (dI/dt = 100 A/µs), supporting fast recovery in hard-switched topologies.

Thermal design is supported by validated junction-to-ambient (R_θJA = 34°C/W) and junction-to-lead (R_θJL = 16°C/W) resistances under standard FR-4 board conditions. The device is rated for TJ = –55°C to +150°C and qualified for consumer applications only-not life-support systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum blocking voltage suitable for 24V input SMPS rails
R_DS(ON) @ V_GS=10V	<11.5 mΩ - Enables low conduction loss at full load in high-current DC-DC stages
I_D Continuous	13.4 A @ T_A=25°C - Supports medium-power loads without forced cooling
Q_g(10V)	22–28 nC - Determines gate drive power and switching speed in PWM controllers
t_rr	36–45 ns - Limits reverse recovery loss during high-side switching transitions
R_θJA	34°C/W - Defines thermal derating on standard 1-in² FR-4 PCB with 2 oz copper
UIS Tested	100% - Guarantees ruggedness against inductive switching surges in real-world layouts

Pinout & Package

SOIC-8 surface-mount package with exposed drain pad (D) on bottom side for enhanced thermal performance. Pin 1 is Gate (G), pins 2–4 and 6–8 are parallel-connected Drain (D), pins 5 and 7 are Source (S).

Pin/Terminal	Circuit Role	Design Meaning
G (Pin 1)	Gate control input	Accepts 0–12 V logic-level drive; threshold V_GS(th) = 1.0–2.5 V enables 4.5 V operation
D (Pins 2,3,4,6,8)	Drain connection	Parallel drain terminals reduce package inductance and improve current sharing in high-dI/dt paths
S (Pins 5,7)	Source return path	Double-source configuration lowers source inductance and improves stability in high-speed switching

Key Features

Feature	Design Value
Advanced trench process	Delivers R_DS(ON) < 11.5 mΩ @ 10 V while maintaining 30 V breakdown margin
100% UIS tested	Ensures reliable operation under unclamped inductive switching stress without derating
Low Q_g/Q_gd ratio	Q_gd = 2.7 nC / Q_g ≈ 10% - Reduces Miller-induced shoot-through risk in half-bridge designs
Optimized body diode	t_rr = 36–45 ns and Q_rr = 47 nC - Minimizes reverse recovery loss in non-synchronous topologies
SOIC-8 with exposed drain	Enables direct thermal coupling to PCB copper pour for improved power dissipation up to 2.4 W at 70°C ambient

Applications

DC-DC Buck Converter	Load Switch
Use Scenario: High-efficiency 12–24 V input to 3.3/5/12 V output conversion in set-top boxes and network routers. IC Role / Device Role / Timing Role: High-side synchronous rectifier controlled by PWM controller (e.g., MP2315, RT7290B). Use Value: R_DS(ON) < 11.5 mΩ reduces conduction loss; low Q_g enables >500 kHz switching without excessive gate drive loss.	Use Scenario: Hot-swap and inrush current limiting for USB-C PD accessories and peripheral modules. IC Role / Device Role / Timing Role: Low-side or high-side power switch enabling controlled turn-on via microcontroller GPIO. Use Value: V_GS(th) = 1.0–2.5 V ensures reliable logic-level drive; 42 A avalanche rating handles capacitive load surges.
Motor Driver Half-Bridge	LED Backlight Boost Stage
Use Scenario: 24 V brushed DC motor control in smart home actuators and HVAC dampers. IC Role / Device Role / Timing Role: Low-side switch in H-bridge with external bootstrap high-side driver. Use Value: 13.4 A continuous current supports 10–15 W motor loads; 100% UIS testing prevents failure during stall or direction reversal.	Use Scenario: High-current boost LED driver for LCD backlighting in commercial displays. IC Role / Device Role / Timing Role: Main switching FET in boost converter topology driving 1–3 A LED strings. Use Value: Fast t_f = 2.8 ns and low C_oss = 330–396 pF minimize switching loss at 300–600 kHz operation.

DC-DC Buck Converter

Load Switch

Use Scenario: High-efficiency 12–24 V input to 3.3/5/12 V output conversion in set-top boxes and network routers.

IC Role / Device Role / Timing Role: High-side synchronous rectifier controlled by PWM controller (e.g., MP2315, RT7290B).

Use Value: R_DS(ON) < 11.5 mΩ reduces conduction loss; low Q_g enables >500 kHz switching without excessive gate drive loss.

Use Scenario: Hot-swap and inrush current limiting for USB-C PD accessories and peripheral modules.

IC Role / Device Role / Timing Role: Low-side or high-side power switch enabling controlled turn-on via microcontroller GPIO.

Use Value: V_GS(th) = 1.0–2.5 V ensures reliable logic-level drive; 42 A avalanche rating handles capacitive load surges.

Motor Driver Half-Bridge

LED Backlight Boost Stage

Use Scenario: 24 V brushed DC motor control in smart home actuators and HVAC dampers.

IC Role / Device Role / Timing Role: Low-side switch in H-bridge with external bootstrap high-side driver.

Use Value: 13.4 A continuous current supports 10–15 W motor loads; 100% UIS testing prevents failure during stall or direction reversal.

Use Scenario: High-current boost LED driver for LCD backlighting in commercial displays.

IC Role / Device Role / Timing Role: Main switching FET in boost converter topology driving 1–3 A LED strings.

Use Value: Fast t_f = 2.8 ns and low C_oss = 330–396 pF minimize switching loss at 300–600 kHz operation.

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	R_DS(ON) = 12.5 mΩ @ 10 V; higher Q_g = 32 nC; TO-252 package	Larger footprint, higher gate drive loss, but better thermal resistance (R_θJA = 62°C/W)	Prefer AO4474 for space-constrained SOIC-8 layouts requiring lower Q_g and tighter R_DS(ON).
DMN3025LSD-13	R_DS(ON) = 10.5 mΩ @ 10 V; dual-N in SO-8; no UIS test data published	Offers dual-device integration but lacks documented UIS qualification and body diode specs	Choose AO4474 when single-channel ruggedness, body diode performance, and 100% UIS validation are required.

Compared with IRF7470PBF and DMN3025LSD-13, the AO4474 provides superior gate charge efficiency and factory-validated UIS robustness in a compact SOIC-8, making it optimal for high-reliability, high-density consumer power stages where layout area and surge immunity are critical.

Availability

AO4474 is available at Aetrix Electronics and suitable for DC-DC converters, load switches, motor drivers, and LED backlight boost stages requiring stable component supply and consistent parametric performance across production batches.

Supply support for AO4474 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 AO4474 belongs to AOS's "AlphaMOS" trench-MOSFET product line, engineered for high-efficiency, high-frequency switching in cost-sensitive consumer power supplies and portable electronics.

FAQ

What is the maximum continuous drain current for AO4474 at 70°C ambient temperature?

The AO4474 supports 10.7 A continuous drain current at T_A = 70°C, based on its thermal resistance (R_θJA = 34°C/W) and maximum junction temperature of 150°C. This value assumes standard SOIC-8 mounting on 1 in² FR-4 with 2 oz copper. Derating must be applied above 70°C ambient per the datasheet thermal curves. The AO4474 datasheet specifies this limit explicitly in the Absolute Maximum Ratings table.

Does AO4474 support 4.5 V logic-level gate drive?

Yes, the AO4474 supports 4.5 V gate drive with R_DS(ON) < 13.5 mΩ at I_D = 10 A and V_GS = 4.5 V. Its gate threshold voltage (V_GS(th)) ranges from 1.0 V to 2.5 V, ensuring strong enhancement-mode turn-on at 4.5 V. This makes the AO4474 compatible with 5 V and 3.3 V microcontrollers and PWM controllers without level-shifting circuitry.

Is AO4474 qualified for automotive applications?

No, the AO4474 is explicitly qualified only for the consumer market. The datasheet states: "THIS PRODUCT HAS BEEN DESIGNED AND QUALIFIED FOR THE CONSUMER MARKET. APPLICATIONS OR USES AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS ARE NOT AUTHORIZED." It does not meet AEC-Q101 requirements and lacks automotive-grade screening, traceability, or extended temperature validation beyond –55°C to +150°C.

What is the body diode forward voltage of AO4474 at 1 A?

The body diode forward voltage (V_SD) of the AO4474 is 0.74–1.0 V at I_S = 1 A and T_J = 25°C, as specified in the Electrical Characteristics table. This low V_SD contributes to reduced conduction loss during freewheeling in non-synchronous converters and improves efficiency in high-duty-cycle applications.

How is the AO4474 protected against avalanche energy?

The AO4474 is 100% tested for Unclamped Inductive Switching (UIS) and rated for repetitive avalanche energy of 88 mJ (L = 0.1 mH). Its avalanche current rating is 42 A, and it is characterized for single-pulse avalanche capability up to 120 A at T_J = 25°C. These parameters are measured under standardized conditions (L = 100 µH, V_DD = 0 V, R_G = 0 Ω) and ensure robustness in real-world inductive switching events.

AO4474 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):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 13.4A (Ta)

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

Rds On (Max) @ Id, Vgs:: 11.5mOhm @ 13.4A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 28 nC @ 10 V

Vgs (Max):: ±12V

Input Capacitance (Ciss) (Max) @ Vds:: 1452 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 3.7W (Ta)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AO4474 FAQ

1.How can I place an order for AO4474 through Aetrix?

Please submit a Request for Quotation (RFQ) for AO4474 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 AO4474 reliable?

The price and inventory of AO4474 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4474 is usually 5 days.

3.What payment methods are accepted for AO4474?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4474 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AO4474?

AO4474 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AO4474 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 AO4474?

For technical support, including AO4474 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4474 requirements.

6.How does Aetrix verify that AO4474 is sourced from the original manufacturer or authorized distributors?

All AO4474 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 AO4474 meets industry standards.

7.What is the process for return or replacement of AO4474?

All AO4474 units undergo pre-shipment inspection (PSI). If there is an issue with AO4474, 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 AO4474 part is unused and in its original packaging.

Return procedure for AO4474:

1.Submit a request within 90 days.

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

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