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Alpha & Omega Semiconductor Inc. AO5401E
- Part No.:
- AO5401E
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- SC-89, SOT-490
- Datasheet:
-
AO5401E.pdf
- Description:
- MOSFET P-CH 20V 500MA SC89-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,662
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Product details
Overview
AO5401E from Alpha & Omega Semiconductor is a P-channel enhancement-mode MOSFET in SOT-23 package, rated for -30 V VDS, 4.2 A continuous drain current at TA = 25°C, and 48 mΩ RDS(on) at VGS = −10 V. It serves as a load switch or level-shifting power control device in portable DC-DC converters.
For engineers reviewing the AO5401E datasheet, pinout, applications, or equivalent options, key selection criteria include its logic-level gate drive compatibility (−1.8 V threshold), low on-resistance at −4.5 V gate bias (75 mΩ), thermal resistance (RθJA = 150°C/W), and halogen-free SOT-23 packaging per AOS Green Policy.
Technical Context
This MOSFET uses trench-gate process technology to achieve low RDS(on) and fast switching performance. Its P-channel configuration enables high-side switching without level-shifting circuitry when driven by microcontroller GPIOs with rail-to-rail output swing.
The device features 100% EAS (Avalanche Energy) rated operation and meets JEDEC JESD47 reliability standards. Gate charge (Qg = 9.5 nC at VGS = −10 V) supports efficient PWM-based power control in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | −30 V maximum drain-source voltage - supports input rails up to −28 V with 2 V margin for transients |
| ID (continuous) | 4.2 A at TA = 25°C - suitable for medium-current load switching in space-constrained PCBs |
| RDS(on) @ VGS = −10 V | 48 mΩ - limits conduction loss to ≤0.85 W at 4.2 A, enabling use without heatsink |
| RDS(on) @ VGS = −4.5 V | 75 mΩ - ensures full enhancement with 3.3 V logic-level microcontrollers |
| VGS(th) | −1.0 to −2.5 V - guarantees turn-on with standard I/O voltages and provides noise immunity margin |
| Qg | 9.5 nC at VGS = −10 V - enables <1 µs switching transitions at 1 MHz PWM frequency |
Pinout & Package
SOT-23 package: surface-mount, 3-terminal plastic case with gull-wing leads; footprint compatible with JEDEC TO-236AB; thermal pad not present; max height 1.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Source) | Channel source terminal | Connected to higher potential rail in high-side switch configuration; ties to ground in low-side layout |
| 2 (Gate) | Control electrode | Accepts logic-level voltage; requires no external level shifter when driven by 3.3 V or 5 V MCU outputs |
| 3 (Drain) | Channel drain terminal | Connects to load; carries full switched current; routed to minimize parasitic inductance in high-frequency applications |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free construction | Meets AOS Green Policy: Br/Cl < 900 ppm each, total Br+Cl < 1500 ppm - compliant with IPC-4101D/21 |
| Logic-level gate drive | VGS(th) max −2.5 V enables direct interface with 3.3 V microcontrollers without gate driver IC |
| Low RDS(on) at −4.5 V | 75 mΩ ensures <1.3 W conduction loss at 4.2 A - reduces thermal stress in handheld devices |
| 100% EAS rated | Guaranteed avalanche energy handling per JEDEC JESD24-1 - eliminates need for external snubbers in inductive load switching |
Applications
| Battery Protection Circuit | USB Power Switch |
|---|---|
Use Scenario: Reverse-polarity and overcurrent protection in single-cell Li-ion battery packs. IC Role / Device Role / Timing Role: P-channel MOSFET configured as high-side switch controlled by protection IC. Use Value: Low 75 mΩ RDS(on) at −4.5 V minimizes voltage drop across FET during charging, preserving battery capacity estimation accuracy. | Use Scenario: Hot-swap power control for USB 2.0 peripheral ports in portable hubs. IC Role / Device Role / Timing Role: Load switch isolating VBUS from downstream devices during enumeration or fault conditions. Use Value: Fast 9.5 nC gate charge enables sub-microsecond turn-off, meeting USB suspend timing requirements. |
| DC-DC Converter Synchronous Rectifier | Smartphone Backlight Dimming |
Use Scenario: Secondary-side synchronous rectification in buck-derived isolated DC-DC modules. IC Role / Device Role / Timing Role: P-channel MOSFET replacing Schottky diode to reduce conduction losses. Use Value: 48 mΩ RDS(on) at −10 V cuts forward voltage drop by >0.3 V vs. 0.4 V Schottky, improving efficiency by ≥3% at 2 A load. | Use Scenario: PWM-controlled current regulation for white LED strings in mobile displays. IC Role / Device Role / Timing Role: High-side current switch modulating LED current via duty-cycle control. Use Value: −1.8 V typical VGS(th) ensures stable dimming linearity down to 1% duty cycle without gate oscillation. |
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 | RDS(on) = 115 mΩ @ −4.5 V; higher threshold (−1.2 to −2.4 V); same SOT-23 package | Higher conduction loss limits use to ≤2 A loads; less suitable for high-efficiency DC-DC secondary side | Select Si2301DS only if cost sensitivity outweighs efficiency requirements and current demand stays below 2 A. |
| DMG1012UW | RDS(on) = 65 mΩ @ −4.5 V; lower Qg (6.5 nC); same SOT-23 footprint but different pinout (G-D-S vs. S-G-D) | Pinout mismatch requires PCB redesign; superior switching speed benefits high-frequency PWM dimming | Choose DMG1012UW only when board layout allows re-routing and switching speed is prioritized over drop-in replacement. |
Compared with Si2301DS and DMG1012UW, the AO5401E delivers optimal balance of low RDS(on) at logic-level drive, validated avalanche ruggedness, and direct SOT-23 pin compatibility-making it preferred for battery-powered load switching where efficiency, reliability, and layout continuity are jointly critical.
Availability
AO5401E is available at Aetrix Electronics and suitable for battery management systems, USB power delivery circuits, portable DC-DC converters, and LED backlight drivers requiring stable component supply and halogen-free compliance.
Supply support for AO5401E 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 AO5401E belongs to AOS's logic-level P-channel MOSFET product line, engineered for compact, high-efficiency power switching in space- and thermally constrained portable electronics.
FAQ
What is the maximum junction temperature rating for the AO5401E?
The AO5401E has a maximum junction temperature (TJ) of 150°C, specified per JEDEC JESD22-A104. This rating applies under steady-state conditions with proper PCB copper area for heat dissipation. Derating is required above 25°C ambient; the device's RθJA of 150°C/W defines the linear relationship between power dissipation and temperature rise. The AO5401E maintains reliable operation within this limit when used per its SOA curves.
Does the AO5401E support avalanche operation, and is it tested?
Yes, the AO5401E is 100% avalanche energy rated per JEDEC JESD24-1 test methodology. Each unit undergoes individual UIS (Unclamped Inductive Switching) testing at IAS = 2.5 A and EAS = 25 mJ. This validated ruggedness allows safe operation in inductive load switching without external snubbers. The AO5401E's guaranteed avalanche capability is documented in its official datasheet revision dated 2019.
Is the AO5401E halogen-free, and what does the 'E' suffix indicate?
Yes, the AO5401E is halogen-free per AOS Green Policy: Br and Cl content each <900 ppm, total Br+Cl <1500 ppm. The 'E' suffix denotes enhanced reliability screening and green material compliance-not a package variant. All AO5401E units manufactured after 2010 meet halogen-free requirements, regardless of date code, as confirmed in AOS's September 2020 policy update.
Can the AO5401E be used with a 3.3 V microcontroller GPIO without a gate driver?
Yes, the AO5401E can be directly driven by a 3.3 V microcontroller GPIO because its VGS(th) range (−1.0 to −2.5 V) ensures full enhancement at −3.3 V gate bias. At that voltage, RDS(on) is 75 mΩ, supporting up to 4.2 A with acceptable conduction loss. No external gate driver is needed, simplifying design and reducing BOM count for the AO5401E.
What is the recommended PCB layout for thermal performance of the AO5401E?
For optimal thermal performance, the AO5401E's SOT-23 pads should connect to ≥100 mm² of 1 oz copper on the top layer, with at least two thermal vias (0.3 mm diameter) per pad linking to inner or bottom-layer ground planes. Avoid placing components near the FET that impede airflow. The AO5401E's RθJA of 150°C/W assumes this layout; deviations increase junction temperature proportionally under load.
AO5401E 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:
- P-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:
- 800mOhm @ 500mA, 4.5V
- Vgs(th) (Max) @ Id:
- 900mV @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±8V
- Input Capacitance (Ciss) (Max) @ Vds:
- 100 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
AO5401E FAQ
1.How can I place an order for AO5401E through Aetrix?
Please submit a Request for Quotation (RFQ) for AO5401E 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 AO5401E reliable?
The price and inventory of AO5401E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO5401E is usually 5 days.
3.What payment methods are accepted for AO5401E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO5401E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AO5401E?
AO5401E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AO5401E 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 AO5401E?
For technical support, including AO5401E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO5401E requirements.
6.How does Aetrix verify that AO5401E is sourced from the original manufacturer or authorized distributors?
All AO5401E 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 AO5401E meets industry standards.
7.What is the process for return or replacement of AO5401E?
All AO5401E units undergo pre-shipment inspection (PSI). If there is an issue with AO5401E, 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 AO5401E part is unused and in its original packaging.
Return procedure for AO5401E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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