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

Alpha & Omega Semiconductor Inc. AO4427

Name: AO4427
Brand: Alpha & Omega Semiconductor Inc.
SKU: AO4427
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AO4427

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

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

Datasheet:: AO4427.pdf

Description:: MOSFET P-CH 30V 12.5A 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:6,916

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Product details

Overview

AO4427 from Alpha & Omega Semiconductor is a -30V, -12.5A P-channel MOSFET in SOIC-8 package, featuring R_DS(ON) < 12 mΩ at V_GS = -20V and ultra-low gate charge (Q_g = 41–52 nC). It serves as a high-efficiency load switch or PWM-controlled power stage in DC-DC converters and battery protection circuits.

For engineers reviewing the AO4427 datasheet, pinout, applications, or equivalent options, key selection considerations include its trench-based low-R_DS(ON) performance, -2.5V typical gate threshold, 2 kV HBM ESD rating, 100% UIS testing, and SOIC-8 thermal profile with R_θJA = 40°C/W on 1-in² FR-4 board.

Technical Context

The AO4427 implements advanced trench-gate MOSFET architecture optimized for low conduction loss and fast switching. Its static characteristics are specified at T_J = 25°C unless noted, with R_DS(ON) validated at V_GS = -10V and -20V across temperature ranges up to 125°C.

Dynamic behavior is characterized under V_GS = -10V, V_DS = -15V, I_D = -12.5A conditions: t_D(on) = 12.8 ns, t_r = 10.3 ns, t_D(off) = 49.5 ns, t_f = 29 ns, and Q_gd/Q_gs ratio of ~1.2 supports clean turn-off in synchronous buck topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	-30 V - Maximum drain-source blocking voltage for negative-rail switching applications
I_D (continuous)	-12.5 A at T_A = 25°C - Sustained current capability with SOIC-8 thermal design
R_DS(ON)	< 12 mΩ at V_GS = -20V - Enables <150 mW conduction loss at 10 A load
Q_g	41–52 nC - Low gate drive energy supports high-frequency PWM up to 1 MHz
V_GS(th)	-1.7 to -3.0 V - Ensures reliable turn-on with standard logic-level gate drivers
ESD Rating	2 kV HBM - Robust handling during PCB assembly and system integration
t_r/t_f	10.3 ns / 29 ns - Fast edge rates reduce switching losses in hard-switched topologies

Pinout & Package

AO4427 is housed in a standard SOIC-8 surface-mount package with exposed drain pad for enhanced thermal dissipation. Pin numbering follows JEDEC MS-012AC, with pins 1–4 and 5–8 forming dual-source/drain arrays.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	Source	Common source connection; electrically tied internally for parallel current sharing
5, 6, 7, 8	Drain	Common drain connection; bonded to exposed pad for low R_θJL = 21°C/W
G (Pin 3)	Gate	Single gate input; requires ≤ ±25 V drive; R_g = 3.4–10 Ω measured at 1 MHz

Key Features

Feature	Design Value
Advanced trench process	Delivers R_DS(ON) < 12 mΩ at -20V while maintaining rugged UIS performance
100% UIS tested	Guarantees unclamped inductive switching robustness for motor and solenoid drive
100% R_g tested	Ensures consistent gate drive timing and predictable switching waveforms
Body diode with t_rr = 28–35 ns	Supports synchronous rectification in buck converters without external Schottky

Applications

Battery Protection Circuit	DC-DC Synchronous Buck Converter
Use Scenario: Reverse-current blocking and over-discharge cutoff in single-cell Li-ion packs. IC Role / Device Role / Timing Role: High-side P-channel load switch controlled by battery management IC. Use Value: R_DS(ON) < 14 mΩ at V_GS = -10V limits voltage drop to <140 mV at 10 A, preserving pack runtime.	Use Scenario: Upper switch in 3.3–12 V input buck regulators powering FPGAs or SoCs. IC Role / Device Role / Timing Role: Synchronously commutated high-side switch operating at 300–1000 kHz. Use Value: Low Q_g and fast t_f reduce gate drive loss and dead-time conduction loss.
Hot-Swap Controller Interface	USB Power Delivery Load Switch
Use Scenario: Inrush current limiting and fault isolation in enterprise server backplanes. IC Role / Device Role / Timing Role: Controlled turn-on switch downstream of hot-swap controller. Use Value: -2.5 V typical V_GS(th) enables precise soft-start via RC gate ramp without level-shifting.	Use Scenario: VBUS enable/disable in USB-C PD sink applications requiring <5 ms response. IC Role / Device Role / Timing Role: Low-impedance, ESD-hardened power path switch. Use Value: 2 kV HBM rating and SOIC-8 footprint meet USB-IF compliance requirements for portable devices.

Battery Protection Circuit

DC-DC Synchronous Buck Converter

Use Scenario: Reverse-current blocking and over-discharge cutoff in single-cell Li-ion packs.

IC Role / Device Role / Timing Role: High-side P-channel load switch controlled by battery management IC.

Use Value: R_DS(ON) < 14 mΩ at V_GS = -10V limits voltage drop to <140 mV at 10 A, preserving pack runtime.

Use Scenario: Upper switch in 3.3–12 V input buck regulators powering FPGAs or SoCs.

IC Role / Device Role / Timing Role: Synchronously commutated high-side switch operating at 300–1000 kHz.

Use Value: Low Q_g and fast t_f reduce gate drive loss and dead-time conduction loss.

Hot-Swap Controller Interface

USB Power Delivery Load Switch

Use Scenario: Inrush current limiting and fault isolation in enterprise server backplanes.

IC Role / Device Role / Timing Role: Controlled turn-on switch downstream of hot-swap controller.

Use Value: -2.5 V typical V_GS(th) enables precise soft-start via RC gate ramp without level-shifting.

Use Scenario: VBUS enable/disable in USB-C PD sink applications requiring <5 ms response.

IC Role / Device Role / Timing Role: Low-impedance, ESD-hardened power path switch.

Use Value: 2 kV HBM rating and SOIC-8 footprint meet USB-IF compliance requirements for portable devices.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si2301DDS	R_DS(ON) = 115 mΩ @ V_GS = -4.5V; SOT-23 package; lower current rating (-2.7 A)	Targeted for space-constrained low-power loads, not high-current switching	Select when board area is critical and I_D ≤ 3 A; AO4427 preferred for >5 A loads
IRF7420PbF	R_DS(ON) = 15 mΩ @ V_GS = -10V; SO-8 package; higher Q_g (65 nC); no 100% UIS test stated	Legacy industrial design with less stringent switching loss requirements	Choose if legacy qualification or IR-compatible footprint required; AO4427 offers superior Q_g/R_DS(ON) trade-off

Compared with Si2301DDS and IRF7420PbF, the AO4427 delivers the lowest R_DS(ON) × Q_g figure-of-merit among SOIC-8 P-channel MOSFETs rated ≥10 A, enabling higher efficiency in thermally constrained 12 V input systems.

Availability

AO4427 is available at Aetrix Electronics and suitable for battery protection circuits, DC-DC synchronous buck converters, hot-swap interfaces, and USB power delivery load switching requiring stable component supply and full traceability.

Supply support for AO4427 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 consumer, computing, and industrial markets.

The AO4427 belongs to AOS's trench-based P-channel MOSFET product line, engineered for high-current, low-voltage load switching where low R_DS(ON), fast switching, and robust UIS performance are essential.

FAQ

What is the maximum continuous drain current for AO4427 at 70°C ambient?

The AO4427 supports -6.0 A continuous drain current at T_A = 70°C with standard SOIC-8 mounting on 1-in² FR-4 board. This derating reflects its R_θJA = 40°C/W thermal resistance and 150°C maximum junction temperature, ensuring safe operation under sustained load conditions without forced airflow.

Does AO4427 have integrated ESD protection, and what level is certified?

Yes, the AO4427 includes on-die ESD protection rated at 2 kV per Human Body Model (HBM), as confirmed in its official datasheet. This level meets IEC 61000-4-2 Level 2 requirements and provides robust handling during automated assembly and field service without requiring external TVS components.

Can AO4427 be driven directly by a 3.3 V microcontroller GPIO?

No - the AO4427 has a gate threshold voltage range of -1.7 V to -3.0 V, but its R_DS(ON) is only guaranteed below 14 mΩ at V_GS ≤ -10 V. A 3.3 V GPIO cannot produce the required negative gate drive; a level-shifting circuit or dedicated gate driver is necessary for full enhancement.

What is the body diode forward voltage of AO4427 at -1 A?

The AO4427 body diode exhibits V_SD = -1.0 V at I_S = -1 A and T_J = 25°C, as specified in its electrical characteristics table. This relatively low forward drop supports efficient freewheeling in buck converters, though external Schottky diodes may still be used for ultra-low-loss designs.

Is AO4427 suitable for automotive applications?

No - the AO4427 is explicitly qualified for the consumer market only. Its datasheet states that applications in life support devices or systems are unauthorized, and it does not meet AEC-Q101 stress test requirements. For automotive use, AOS offers AEC-Q101-qualified alternatives such as the AOB410L.

AO4427 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:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 12.5A (Ta)

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

Rds On (Max) @ Id, Vgs:: 12mOhm @ 12.5A, 20V

Vgs(th) (Max) @ Id:: 3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 52 nC @ 10 V

Vgs (Max):: ±25V

Input Capacitance (Ciss) (Max) @ Vds:: 2900 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 3W (Ta)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AO4427 FAQ

1.How can I place an order for AO4427 through Aetrix?

Please submit a Request for Quotation (RFQ) for AO4427 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 AO4427 reliable?

The price and inventory of AO4427 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4427 is usually 5 days.

3.What payment methods are accepted for AO4427?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4427 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AO4427?

AO4427 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AO4427 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 AO4427?

For technical support, including AO4427 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4427 requirements.

6.How does Aetrix verify that AO4427 is sourced from the original manufacturer or authorized distributors?

All AO4427 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 AO4427 meets industry standards.

7.What is the process for return or replacement of AO4427?

All AO4427 units undergo pre-shipment inspection (PSI). If there is an issue with AO4427, 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 AO4427 part is unused and in its original packaging.

Return procedure for AO4427:

1.Submit a request within 90 days.

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

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