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

Alpha & Omega Semiconductor Inc. AO3406L

Name: AO3406L
Brand: Alpha & Omega Semiconductor Inc.
SKU: AO3406L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AO3406L

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 3-SMD, SOT-23-3 Variant

Datasheet:: AO3406L.pdf

Description:: MOSFET N-CH 30V 3.6A SOT23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AO3406L from Alpha and Omega Semiconductor is a 30 V, 5.8 A N-channel enhancement-mode MOSFET in SOT-23 package, with R_DS(ON) = 35 mΩ @ V_GS = 10 V and 48 mΩ @ V_GS = 4.5 V, designed for low-voltage DC-DC conversion, load switching, and battery protection circuits.

For engineers reviewing the AO3406L datasheet, pinout, applications, or equivalent options, key selection criteria include gate threshold voltage (1–3 V), body diode reverse recovery time (10.2–14 ns), continuous drain current rating (5.8 A at T_A = 25°C), and thermal resistance (R_θJA = 120°C/W on 1-in² FR-4 board).

Technical Context

This MOSFET operates as a single N-channel power switch with logic-level gate drive compatibility, supporting 4.5 V and 10 V gate drive conditions. Its low R_DS(ON) and fast switching parameters-including t_D(on) = 4.6 ns, t_r = 1.9 ns, and Q_g(4.5V) = 3.1–4 nC-enable high-efficiency operation in synchronous buck converters and portable power management.

The integrated body diode exhibits V_SD = 0.79–1 V at I_S = 1 A and t_rr = 10.2–14 ns under I_F = 3.6 A / dI/dt = 100 A/μs conditions, making it suitable for freewheeling paths where controlled reverse recovery is required.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - maximum drain-source blocking voltage for 24 V rail applications
I_D (continuous)	5.8 A @ T_A = 25°C - usable current limit in SOT-23 without forced cooling
R_DS(ON)	48 mΩ @ V_GS = 4.5 V - enables efficient 3.3/5 V logic-driven switching
V_GS(th)	1–3 V - ensures turn-on with standard GPIO or LDO outputs
Q_g(4.5V)	3.1–4 nC - low gate charge supports >1 MHz PWM in compact DC-DC designs
t_rr	10.2–14 ns - limits body-diode switching loss in discontinuous conduction mode
R_θJA	120°C/W - thermal performance validated on 1-in² FR-4 with 2 oz copper

Pinout & Package

SOT-23 (TO-236) package with gull-wing leads, 1.3 mm × 2.9 mm footprint, 1.1 mm height, and JEDEC MS-012 compliant outline.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control input	Receives gate drive signal; threshold-compatible with 3.3 V and 5 V logic
2 (Source)	Reference node	Common return path for load current and gate drive reference
3 (Drain)	Power output	Switches high-side or low-side loads up to 30 V and 5.8 A

Key Features

Feature	Design Value
Logic-level gate drive	Guaranteed turn-on at V_GS = 4.5 V, compatible with microcontroller GPIOs
Low R_DS(ON) at 4.5 V	48 mΩ enables <100 mW conduction loss at 5 A in compact SOT-23
Fast switching speed	t_r/t_f = 1.9/2.6 ns minimizes transition losses in high-frequency SMPS
Optimized body diode	Q_rr = 3.5 nC and t_rr = 10.2–14 ns reduce reverse recovery energy in buck freewheeling
Thermally robust construction	R_θJA = 120°C/W allows 5.8 A operation at ambient ≤50°C with no heatsink

Applications

USB Power Delivery Switch	Portable Device Load Switch
Use Scenario: Enables/disables 5 V USB power path in smartphones and tablets using MCU-controlled enable signal. IC Role / Device Role / Timing Role: Low-side load switch controlling VBUS routing with minimal voltage drop and fast response. Use Value: R_DS(ON) = 48 mΩ @ 4.5 V ensures <240 mV drop at 5 A, preserving USB voltage margin.	Use Scenario: Isolates backup battery from main system during sleep or fault conditions in wearables. IC Role / Device Role / Timing Role: High-side or low-side power gate managing battery-to-system connection. Use Value: V_GS(th) = 1–3 V allows direct control from ultra-low-power PMIC outputs without level shifters.
DC-DC Synchronous Rectifier	LED Driver Current Switch
Use Scenario: Replaces Schottky diode in 3.3 V/5 V buck converter output stage to improve efficiency. IC Role / Device Role / Timing Role: Synchronous rectifier driven by controller's complementary PWM signal. Use Value: Q_g(4.5V) = 3.1–4 nC supports clean gate drive at ≥1 MHz, reducing dead-time losses.	Use Scenario: PWM dimming switch for white LED strings in backlight and indicator applications. IC Role / Device Role / Timing Role: Low-side current sink modulating LED current with high duty-cycle fidelity. Use Value: t_D(on)/t_D(off) = 4.6/20.1 ns ensures precise edge timing for 100 Hz–20 kHz dimming.

USB Power Delivery Switch

Portable Device Load Switch

Use Scenario: Enables/disables 5 V USB power path in smartphones and tablets using MCU-controlled enable signal.

IC Role / Device Role / Timing Role: Low-side load switch controlling VBUS routing with minimal voltage drop and fast response.

Use Value: R_DS(ON) = 48 mΩ @ 4.5 V ensures <240 mV drop at 5 A, preserving USB voltage margin.

Use Scenario: Isolates backup battery from main system during sleep or fault conditions in wearables.

IC Role / Device Role / Timing Role: High-side or low-side power gate managing battery-to-system connection.

Use Value: V_GS(th) = 1–3 V allows direct control from ultra-low-power PMIC outputs without level shifters.

DC-DC Synchronous Rectifier

LED Driver Current Switch

Use Scenario: Replaces Schottky diode in 3.3 V/5 V buck converter output stage to improve efficiency.

IC Role / Device Role / Timing Role: Synchronous rectifier driven by controller's complementary PWM signal.

Use Value: Q_g(4.5V) = 3.1–4 nC supports clean gate drive at ≥1 MHz, reducing dead-time losses.

Use Scenario: PWM dimming switch for white LED strings in backlight and indicator applications.

IC Role / Device Role / Timing Role: Low-side current sink modulating LED current with high duty-cycle fidelity.

Use Value: t_D(on)/t_D(off) = 4.6/20.1 ns ensures precise edge timing for 100 Hz–20 kHz dimming.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN3026LSD-13	R_DS(ON) = 32 mΩ @ 4.5 V; higher I_D = 6.5 A; SO-8 package	Requires PCB layout change; better for higher-current, lower-R_DS(ON) needs	Choose when thermal headroom and current capacity exceed SOT-23 limits
SI2306DS-T1-E3	R_DS(ON) = 52 mΩ @ 4.5 V; Q_g = 4.3 nC; same SOT-23 package	Direct footprint replacement but higher conduction loss and slower switching	Acceptable for cost-sensitive, lower-frequency (<500 kHz) load-switch use cases

Compared with DMN3026LSD-13 and SI2306DS-T1-E3, the AO3406L delivers optimal balance of low gate charge, moderate R_DS(ON), and SOT-23 compatibility-making it preferred for space-constrained, medium-frequency DC-DC and load-switch designs where thermal budget is tight.

Availability

AO3406L is available at Aetrix Electronics and suitable for USB power delivery, portable device load switching, and DC-DC synchronous rectification requiring stable component supply across production volumes.

Supply support for AO3406L 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 and 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 AO3406L belongs to AOS's logic-level N-channel MOSFET product line, engineered for compact, high-efficiency power switching in battery-powered and space-limited systems.

FAQ

What is the maximum continuous drain current for AO3406L at room temperature?

The AO3406L supports 5.8 A continuous drain current at T_A = 25°C on a standard 1-in² FR-4 board with 2 oz copper. This rating assumes still-air conditions and accounts for thermal resistance R_θJA = 120°C/W. At elevated ambient temperatures or reduced copper area, derating is required per the SOA curve in the AO3406L datasheet.

Does AO3406L support 3.3 V logic-level gate drive?

Yes, the AO3406L has a gate threshold voltage range of 1–3 V and specified R_DS(ON) = 48 mΩ at V_GS = 4.5 V, enabling reliable turn-on with 3.3 V logic. While not fully enhanced at 3.3 V, typical R_DS(ON) remains below 70 mΩ, making AO3406L suitable for GPIO-driven load switching where moderate on-resistance is acceptable.

What is the body diode reverse recovery charge (Q_rr) of AO3406L?

The AO3406L has a body diode reverse recovery charge Q_rr of 3.5 nC, measured under I_F = 3.6 A and dI/dt = 100 A/μs conditions. This value reflects the stored charge cleared during diode turn-off and directly impacts switching loss in synchronous rectifier and flyback applications where the internal diode conducts.

Is AO3406L qualified for automotive applications?

No, the AO3406L is explicitly designed and qualified for the consumer market only. Alpha and Omega Semiconductor states that applications in life-support devices or automotive safety-critical systems are unauthorized. For automotive-grade alternatives, consult AOS's AEC-Q101-qualified AOxxx series with appropriate qualification documentation.

What package type does AO3406L use and what are its mounting requirements?

The AO3406L uses the SOT-23 (TO-236) surface-mount package with gull-wing leads. It requires standard reflow soldering per J-STD-020, and thermal performance is characterized on 1-in² FR-4 board with 2 oz copper. No thermal pad or exposed drain is present; PCB copper pour under the package improves heat dissipation but is not mandatory for 5.8 A operation at 25°C ambient.

AO3406L Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: 3-SMD, SOT-23-3 Variant

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:: 3.6A (Ta)

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

Rds On (Max) @ Id, Vgs:: 50mOhm @ 3.6A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 5 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 210 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 1.4W (Ta)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

AO3406L FAQ

1.How can I place an order for AO3406L through Aetrix?

Please submit a Request for Quotation (RFQ) for AO3406L 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 AO3406L reliable?

The price and inventory of AO3406L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO3406L is usually 5 days.

3.What payment methods are accepted for AO3406L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO3406L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AO3406L?

AO3406L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AO3406L 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 AO3406L?

For technical support, including AO3406L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO3406L requirements.

6.How does Aetrix verify that AO3406L is sourced from the original manufacturer or authorized distributors?

All AO3406L 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 AO3406L meets industry standards.

7.What is the process for return or replacement of AO3406L?

All AO3406L units undergo pre-shipment inspection (PSI). If there is an issue with AO3406L, 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 AO3406L part is unused and in its original packaging.

Return procedure for AO3406L:

1.Submit a request within 90 days.

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

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