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

Alpha & Omega Semiconductor Inc. AOT2144L

Name: AOT2144L
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOT2144L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOT2144L

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: AOT2144L.pdf

Description:: N

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Product details

Overview

AOT2144L from Alpha & Omega Semiconductor is a 40V N-channel Trench Power MV MOSFET optimized for high-current switching in DC/DC converters and motor drives, featuring R_DS(ON) < 2.3 mΩ at V_GS=10V, 120 A continuous drain current at T_C=25°C, and 100% UIS-tested ruggedness for reliable operation in hard-switching topologies.

For engineers reviewing the AOT2144L datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-220 package thermal performance (R_θJC = 0.8°C/W), low gate charge (Q_g(10V) = 68–95 nC), body-diode recovery characteristics (t_rr = 20 ns, Q_rr = 60 nC), and avalanche energy rating (E_AS = 331 mJ).

Technical Context

The AOT2144L employs Trench Power MV MOSFET technology to achieve ultra-low on-resistance and enhanced switching efficiency. Its gate threshold voltage (V_GS(th) = 1.4–2.4 V at 25°C) enables robust turn-on with standard logic-level drivers, while its low R_DS(ON) at 4.5 V (≤ 4 mΩ) supports efficient operation in 5 V gate-drive systems.

Thermal design is enabled by a junction-to-case resistance of 0.8°C/W and a maximum junction temperature of 175°C. The device's SOA curve is validated up to 10 ms pulse width with V_DS ≤ 40 V and I_D ≤ 120 A, and it is fully characterized for unclamped inductive switching (UIS) and body-diode reverse recovery under controlled di/dt conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage compatible with 36 V nominal bus systems and 48 V industrial power rails.
I_D (T_C=25°C)	120 A - Continuous conduction capability enabling high-power motor control and synchronous rectification without external parallel devices.
R_DS(ON) (V_GS=10V)	< 2.3 mΩ - Minimizes conduction loss in high-current paths; yields ≤ 33 W conduction loss at 120 A.
Q_g(10V)	68–95 nC - Enables fast, low-loss switching with moderate gate driver strength (e.g., 2 A peak drive sufficient for <100 ns transition times).
E_AS	331 mJ - Confirmed single-pulse avalanche energy rating ensures reliability during transient overvoltage events in inductive loads.
t_rr/Q_rr	20 ns / 60 nC - Fast, low-charge body-diode recovery reduces cross-conduction loss and EMI in synchronous buck and LLC topologies.
R_θJC	0.8°C/W - Allows direct heatsink mounting for high-power dissipation; supports >90 W steady-state power with 100°C ΔT.

Pinout & Package

Package: TO-220 (3-lead, straight lead form). Thermal pad electrically connected to drain; tab is drain terminal.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control input	Receives gate drive signal; requires 10 V for full enhancement; low C_iss (5225 pF) eases drive design.
D (Drain)	High-side switch node	Connected to power rail or inductive load; electrically tied to metal tab for thermal and electrical conduction.
S (Source)	Return path / reference	Common return for gate drive and load current; defines local ground reference for gate-source voltage.

Key Features

Feature	Design Value
100% UIS tested	Guarantees avalanche robustness across production lot; eliminates need for system-level derating due to statistical failure risk.
Low R_DS(ON) at 4.5 V	< 4 mΩ enables use with 5 V microcontrollers and integrated gate drivers without level-shifting circuitry.
Optimized ruggedness	Validated SOA and UIS performance ensures stable operation under short-circuit and overload conditions in motor and power supply designs.
RoHS and halogen-free	Complies with IPC-1752A material declaration requirements for automotive and industrial end-equipment compliance.
Low gate charge	Q_g(4.5V) = 28–40 nC reduces gate drive power loss and allows higher PWM frequencies with lower driver dissipation.

Applications

DC Motor Driver	Synchronous Rectifier
Use Scenario: High-current H-bridge for 24–48 V brushed DC motors in industrial automation and robotics. IC Role / Device Role / Timing Role: Low-side and high-side switching element handling bidirectional 120 A peak currents with minimal conduction loss. Use Value: Sub-2.3 mΩ R_DS(ON) reduces I²R losses below 35 W at full load, enabling compact heatsink design and extended duty-cycle operation.	Use Scenario: Secondary-side synchronous rectification in isolated 48 V input DC/DC converters for telecom and server PSUs. IC Role / Device Role / Timing Role: Fast-turning, low-V_F replacement for Schottky diodes in forward and flyback topologies. Use Value: Body-diode t_rr = 20 ns and Q_rr = 60 nC minimize reverse-recovery spikes, improving efficiency by ≥1.2% at 200 kHz switching.
Power Supply Switch	Industrial Inverter Stage
Use Scenario: Primary-side switching FET in non-isolated buck regulators delivering up to 100 A output current. IC Role / Device Role / Timing Role: Main power switch operating at 100–500 kHz with low Q_g and fast t_f = 10.5 ns for reduced switching loss. Use Value: Q_g(10V) = 68–95 nC and t_D(off) = 57.5 ns enable clean turn-off even with modest gate resistance (R_g = 2 Ω), minimizing shoot-through risk.	Use Scenario: Half-bridge leg in 3-phase inverters for HVAC compressors and pump controllers. IC Role / Device Role / Timing Role: High-current, high-ruggedness switching device subjected to repetitive inductive transients and bus overvoltage. Use Value: 331 mJ E_AS and 100% UIS testing ensure survival under worst-case short-circuit fault conditions without derating.

DC Motor Driver

Synchronous Rectifier

Use Scenario: High-current H-bridge for 24–48 V brushed DC motors in industrial automation and robotics.

IC Role / Device Role / Timing Role: Low-side and high-side switching element handling bidirectional 120 A peak currents with minimal conduction loss.

Use Value: Sub-2.3 mΩ R_DS(ON) reduces I²R losses below 35 W at full load, enabling compact heatsink design and extended duty-cycle operation.

Use Scenario: Secondary-side synchronous rectification in isolated 48 V input DC/DC converters for telecom and server PSUs.

IC Role / Device Role / Timing Role: Fast-turning, low-V_F replacement for Schottky diodes in forward and flyback topologies.

Use Value: Body-diode t_rr = 20 ns and Q_rr = 60 nC minimize reverse-recovery spikes, improving efficiency by ≥1.2% at 200 kHz switching.

Power Supply Switch

Industrial Inverter Stage

Use Scenario: Primary-side switching FET in non-isolated buck regulators delivering up to 100 A output current.

IC Role / Device Role / Timing Role: Main power switch operating at 100–500 kHz with low Q_g and fast t_f = 10.5 ns for reduced switching loss.

Use Value: Q_g(10V) = 68–95 nC and t_D(off) = 57.5 ns enable clean turn-off even with modest gate resistance (R_g = 2 Ω), minimizing shoot-through risk.

Use Scenario: Half-bridge leg in 3-phase inverters for HVAC compressors and pump controllers.

IC Role / Device Role / Timing Role: High-current, high-ruggedness switching device subjected to repetitive inductive transients and bus overvoltage.

Use Value: 331 mJ E_AS and 100% UIS testing ensure survival under worst-case short-circuit fault conditions without derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF1404PbF	R_DS(ON) = 4.7 mΩ @ 10 V; Q_g = 131 nC; TO-220 package; lower current rating (I_D = 202 A but silicon-limited at 130 A)	Higher conduction loss and slower switching; less suitable for high-frequency, high-efficiency designs	Select when cost sensitivity outweighs efficiency targets and thermal margin permits higher R_DS(ON).
STP120N4F6	R_DS(ON) = 2.8 mΩ @ 10 V; Q_g = 105 nC; TO-220; slightly higher gate charge and lower avalanche rating (E_AS = 270 mJ)	Reduced ruggedness margin in inductive switching; requires tighter layout control for EMI	Prefer where STMicroelectronics qualification or long-term availability is mandated, accepting minor trade-offs in UIS margin.

Compared with IRF1404PbF and STP120N4F6, the AOT2144L delivers superior combination of low R_DS(ON), low Q_g, and high E_AS, making it optimal for space-constrained, high-efficiency, and fault-tolerant power stages where thermal and transient performance are critical.

Availability

AOT2144L is available at Aetrix Electronics and suitable for DC motor drivers, synchronous rectifiers in DC/DC converters, and industrial inverter stages requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.

Supply support for AOT2144L 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, industrial, and automotive markets.

The AOT2144L belongs to AOS' Trench Power MV MOSFET product line, engineered specifically for high-current, high-efficiency switching in power conversion and motor control applications where low R_DS(ON), ruggedness, and thermal performance are prioritized.

FAQ

What is the maximum continuous drain current rating for the AOT2144L?

The AOT2144L has a maximum continuous drain current I_D of 120 A at case temperature T_C = 25°C. This rating is package-limited and decreases linearly to 47 A at T_C = 100°C per the datasheet de-rating curve. Operation above 120 A requires pulsed conditions validated against the SOA chart and thermal limits.

Does the AOT2144L support 5 V gate drive?

Yes, the AOT2144L supports 5 V gate drive with guaranteed R_DS(ON) ≤ 4 mΩ at V_GS = 4.5 V and I_D = 20 A. Its gate threshold voltage V_GS(th) ranges from 1.4 V to 2.4 V, ensuring reliable turn-on with standard 5 V logic outputs, though full enhancement and lowest R_DS(ON) require ≥10 V.

Is the AOT2144L suitable for synchronous rectification in high-frequency DC/DC converters?

Yes, the AOT2144L is well-suited for synchronous rectification in high-frequency DC/DC converters due to its low Q_g(4.5V) = 28–40 nC, fast t_f = 10.5 ns, and body-diode t_rr = 20 ns. These parameters reduce switching loss and reverse-recovery-related EMI, especially in 200–500 kHz buck and LLC topologies where the AOT2144L replaces Schottky diodes.

What is the thermal resistance from junction to case (R_θJC) for the AOT2144L?

The AOT2144L has a maximum junction-to-case thermal resistance R_θJC of 0.8°C/W, measured with the device mounted to a large heatsink. This value enables efficient heat transfer from die to heatsink and supports >90 W steady-state power dissipation with a 100°C temperature differential, assuming proper mechanical mounting and thermal interface material.

How is avalanche capability verified for the AOT2144L?

The AOT2144L undergoes 100% Unclamped Inductive Switching (UIS) testing per JEDEC JESD22-A116. Each unit is stressed with L = 0.3 mH, I_AS = 120 A, and V_DS = 40 V, verifying minimum single-pulse avalanche energy E_AS = 331 mJ. This ensures robustness against inductive turn-off transients without requiring external snubbers in properly designed circuits.

AOT2144L Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-220-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 205A (Tc)

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

Rds On (Max) @ Id, Vgs:: 2.3mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 2.4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 95 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 5225 pF @ 20 V

FET Feature:: -

Power Dissipation (Max):: 8.3W (Ta), 187W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

AOT2144L FAQ

1.How can I place an order for AOT2144L through Aetrix?

Please submit a Request for Quotation (RFQ) for AOT2144L 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 AOT2144L reliable?

The price and inventory of AOT2144L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOT2144L is usually 5 days.

3.What payment methods are accepted for AOT2144L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOT2144L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOT2144L?

AOT2144L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOT2144L 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 AOT2144L?

For technical support, including AOT2144L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOT2144L requirements.

6.How does Aetrix verify that AOT2144L is sourced from the original manufacturer or authorized distributors?

All AOT2144L 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 AOT2144L meets industry standards.

7.What is the process for return or replacement of AOT2144L?

All AOT2144L units undergo pre-shipment inspection (PSI). If there is an issue with AOT2144L, 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 AOT2144L part is unused and in its original packaging.

Return procedure for AOT2144L:

1.Submit a request within 90 days.

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

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