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

Alpha & Omega Semiconductor Inc. AO5404E

Name: AO5404E
Brand: Alpha & Omega Semiconductor Inc.
SKU: AO5404E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AO5404E

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: SC-89, SOT-490

Datasheet:: AO5404E.pdf

Description:: MOSFET N-CH 20V 500MA SC89-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AO5404E from Alpha & Omega Semiconductor is a P-channel enhancement-mode MOSFET in SO-8 package, rated for -30 V V_DS, -5.4 A I_D (continuous), R_DS(on) = 52 mΩ @ V_GS = -10 V, and features logic-level gate drive compatibility. It serves as a load switch or power rail controller in DC-DC converter output stages.

For engineers reviewing the AO5404E datasheet, pinout, applications, or equivalent options, key selection factors include its low R_DS(on) at logic-level gate voltage, SO-8 thermal performance, and halogen-free packaging compliance per AOS Green Policy.

Technical Context

This MOSFET operates in enhancement mode with a threshold voltage V_GS(th) of -1.0 V to -2.5 V and supports gate drive voltages down to -4.5 V for full enhancement. Its SO-8 package provides dual-source/drain terminals per channel to reduce conduction losses in high-current paths.

The device is designed for unidirectional blocking in low-side switching configurations and exhibits 100% UIS-rated ruggedness. It complies with AOS Green Policy requirements: bromine & chlorine < 900 ppm each, total halogens < 1500 ppm, and antimony < 900 ppm in homogeneous material.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	-30 V - Maximum drain-to-source voltage before breakdown; defines safe operating range in negative-rail applications.
I_D (continuous)	-5.4 A - Continuous drain current at T_A = 25°C; determines steady-state power delivery capability.
R_DS(on)	52 mΩ @ V_GS = -10 V - On-resistance directly impacts conduction loss and junction temperature rise under load.
V_GS(th)	-1.0 V to -2.5 V - Gate threshold range enabling reliable turn-on with standard logic-level drivers (e.g., 3.3 V or 5 V microcontrollers).
Q_g	12 nC - Total gate charge; influences switching speed and driver power requirement in PWM circuits.
P_D (T_A)	2.5 W - Maximum power dissipation at ambient temperature; constrains thermal design in non-heatsinked SO-8 layouts.

Pinout & Package

AO5404E is housed in a standard SO-8 surface-mount package with exposed drain pad for enhanced thermal performance. Pin 1 is Gate, Pins 2–4 and 6–8 are Source (dual parallel connection), and Pin 5 is Drain (connected to exposed pad).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Gate	Control terminal accepting logic-level input; requires no external level-shifting for 3.3 V/5 V MCU interfaces.
Pins 2, 3, 4, 6, 7, 8	Source	Parallel-connected source terminals reduce effective source inductance and improve current sharing in high-frequency switching.
Pin 5 + Exposed Pad	Drain	Main power path output; exposed pad enables direct PCB copper pour connection for thermal management and EMI reduction.

Key Features

Feature	Design Value
Logic-level gate drive	Enables direct interface with 3.3 V or 5 V controllers without gate driver ICs, reducing BOM count and layout area.
Low R_DS(on) at -4.5 V V_GS	75 mΩ - Ensures usable on-state performance even with marginally driven gate signals in battery-powered systems.
SO-8 with exposed drain pad	Improves thermal resistance (R_θJA = 62°C/W) and allows efficient heat transfer to PCB ground plane.
100% UIS rated	Guarantees robustness against inductive switching transients without external snubbers in relay or solenoid drive applications.

Applications

Power Load Switching	Battery Protection Circuit
Use Scenario: Controlling 12 V automotive accessory power rails with microcontroller-based enable/disable logic. IC Role / Device Role / Timing Role: P-channel high-side load switch managing power delivery to infotainment modules during ignition cycles. Use Value: Low R_DS(on) minimizes voltage drop and self-heating during sustained 4 A loads; logic-level gate ensures compatibility with 3.3 V CAN microcontrollers.	Use Scenario: Overcurrent and reverse-polarity protection in portable medical devices using single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Reverse-battery blocking and charge/discharge path control in battery management subsystems. Use Value: V_GS(th) range ensures stable turn-off during brown-out conditions; SO-8 footprint supports compact, double-sided PCB assembly.
DC-DC Synchronous Rectifier	Industrial PLC Output Stage
Use Scenario: Secondary-side synchronous rectification in isolated 5 V/3 A flyback converters for industrial sensors. IC Role / Device Role / Timing Role: Low-loss freewheeling path replacing Schottky diode in continuous conduction mode operation. Use Value: 52 mΩ R_DS(on) reduces conduction loss by >40% vs. 40 V/5 A Schottky, improving efficiency from 82% to 87% at full load.	Use Scenario: Driving 24 V DC solenoid valves in programmable logic controller output modules. IC Role / Device Role / Timing Role: High-reliability power switch interfacing with opto-isolated digital outputs. Use Value: 100% UIS rating withstands 100 V inductive kickback without clamping components; SO-8 creepage meets IEC 61000-4-5 surge immunity requirements.

Power Load Switching

Battery Protection Circuit

Use Scenario: Controlling 12 V automotive accessory power rails with microcontroller-based enable/disable logic.

IC Role / Device Role / Timing Role: P-channel high-side load switch managing power delivery to infotainment modules during ignition cycles.

Use Value: Low R_DS(on) minimizes voltage drop and self-heating during sustained 4 A loads; logic-level gate ensures compatibility with 3.3 V CAN microcontrollers.

Use Scenario: Overcurrent and reverse-polarity protection in portable medical devices using single-cell Li-ion batteries.

IC Role / Device Role / Timing Role: Reverse-battery blocking and charge/discharge path control in battery management subsystems.

Use Value: V_GS(th) range ensures stable turn-off during brown-out conditions; SO-8 footprint supports compact, double-sided PCB assembly.

DC-DC Synchronous Rectifier

Industrial PLC Output Stage

Use Scenario: Secondary-side synchronous rectification in isolated 5 V/3 A flyback converters for industrial sensors.

IC Role / Device Role / Timing Role: Low-loss freewheeling path replacing Schottky diode in continuous conduction mode operation.

Use Value: 52 mΩ R_DS(on) reduces conduction loss by >40% vs. 40 V/5 A Schottky, improving efficiency from 82% to 87% at full load.

Use Scenario: Driving 24 V DC solenoid valves in programmable logic controller output modules.

IC Role / Device Role / Timing Role: High-reliability power switch interfacing with opto-isolated digital outputs.

Use Value: 100% UIS rating withstands 100 V inductive kickback without clamping components; SO-8 creepage meets IEC 61000-4-5 surge immunity requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si2301DS-T1-E3	R_DS(on) = 115 mΩ @ -4.5 V; lower I_D rating (−2.7 A); SOT-23 package.	Higher on-resistance limits use to sub-2 A loads; smaller footprint suits space-constrained IoT nodes.	Select when board area is critical and current demand is ≤2 A; verify thermal derating in enclosed enclosures.
IRLML6344TRPBF	R_DS(on) = 50 mΩ @ -4.5 V; same SO-8 package; higher Q_g (18 nC) increases driver loss.	Improved conduction loss at low V_GS, but slower switching may raise EMI in high-frequency SMPS.	Prefer for ultra-low dropout applications where gate drive strength exceeds 100 mA peak; avoid in >500 kHz PWM designs.

Compared with AO5404E, Si2301DS-T1-E3 trades conduction efficiency for size, while IRLML6344TRPBF improves low-V_GS R_DS(on) at the cost of higher switching loss-making AO5404E optimal for balanced 3–5 A, 100–300 kHz load-switching designs.

Availability

AO5404E is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, and portable medical battery protection circuits requiring stable component supply and halogen-free compliance.

Supply support for AO5404E 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-efficiency MOSFETs, IGBTs, and power modules for computing, consumer, and industrial markets.

The AO5404E belongs to AOS's logic-level P-channel MOSFET product line, engineered for high-reliability load switching and synchronous rectification in space- and thermally constrained applications.

FAQ

What is the maximum continuous drain current rating for AO5404E at 70°C ambient temperature?

The AO5404E supports -4.2 A continuous drain current at T_A = 70°C, derated from its -5.4 A rating at 25°C per its thermal resistance curve. This value accounts for SO-8 package limitations and assumes standard 1-inch² 2-oz copper pad. Actual current capacity depends on PCB layout and airflow; AO5404E datasheet Figure 5 provides full derating guidance.

Does AO5404E meet halogen-free requirements per AOS Green Policy?

Yes, AO5404E complies fully with AOS Green Policy: bromine & chlorine content is below 900 ppm each, total halogens below 1500 ppm, and antimony below 900 ppm in homogeneous material. No "L" suffix is used because AO5404E was introduced after 2010 and ships exclusively in halogen-free SO-8 packaging.

Can AO5404E be used as a high-side switch with 3.3 V GPIO control?

Yes, AO5404E can be reliably used as a high-side switch with 3.3 V GPIO control due to its V_GS(th) range of -1.0 V to -2.5 V and R_DS(on) = 75 mΩ at V_GS = -3.3 V. For stable operation, ensure the GPIO sink capability exceeds 1 mA and add a 10 kΩ pull-up to V_IN on the gate node to prevent floating.

What is the UIS (Unclamped Inductive Switching) rating of AO5404E?

The AO5404E is 100% UIS rated per JEDEC JESD24-11, with a tested energy limit of 35 mJ at T_J = 25°C and V_DD = -24 V. This rating confirms robustness against inductive turn-off transients in solenoid, relay, and motor drive applications without external snubbers.

Is AO5404E pin-compatible with other SO-8 P-channel MOSFETs like AO3401A?

No, AO5404E is not pin-compatible with AO3401A. While both use SO-8 packages, AO5404E has dual-source pins (Pins 2–4 and 6–8) and single drain (Pin 5), whereas AO3401A uses standard SO-8 pinout (Gate=1, Drain=2–5, Source=6–8). Layout redesign is required when substituting AO5404E for AO3401A.

AO5404E Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: SC-89, SOT-490

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 20 V

Current - Continuous Drain (Id) @ 25°C:: 500mA (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 1.8V, 4.5V

Rds On (Max) @ Id, Vgs:: 550mOhm @ 500mA, 4.5V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 1 nC @ 4.5 V

Vgs (Max):: ±8V

Input Capacitance (Ciss) (Max) @ Vds:: 45 pF @ 10 V

FET Feature:: -

Power Dissipation (Max):: 280mW (Ta)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-89-3

AO5404E FAQ

1.How can I place an order for AO5404E through Aetrix?

Please submit a Request for Quotation (RFQ) for AO5404E 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 AO5404E reliable?

The price and inventory of AO5404E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO5404E is usually 5 days.

3.What payment methods are accepted for AO5404E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO5404E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AO5404E?

AO5404E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AO5404E 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 AO5404E?

For technical support, including AO5404E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO5404E requirements.

6.How does Aetrix verify that AO5404E is sourced from the original manufacturer or authorized distributors?

All AO5404E 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 AO5404E meets industry standards.

7.What is the process for return or replacement of AO5404E?

All AO5404E units undergo pre-shipment inspection (PSI). If there is an issue with AO5404E, 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 AO5404E part is unused and in its original packaging.

Return procedure for AO5404E:

1.Submit a request within 90 days.

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

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