Alpha & Omega Semiconductor Inc. AOTF454L

Overview

AOTF454L from Alpha & Omega Semiconductor is a 150V N-Channel trench MOSFET in TO-220F package, rated for 13A continuous drain current at V_GS=10V, with R_DS(ON) < 94 mΩ at V_GS=10V and < 110 mΩ at V_GS=7V. It features 100% UIS and 100% R_g testing, and is optimized for synchronous rectification and boost converter stages in consumer, telecom, and industrial power supplies.

For engineers reviewing the AOTF454L datasheet, pinout, applications, or equivalent options, key selection criteria include its low R_DS(ON) at 7V gate drive, robust avalanche energy rating (E_AS), thermal resistance (R_θJC = 3°C/W), and TO-220F package suitability for heatsink-mounted high-current switching.

Technical Context

The AOTF454L employs advanced trench-gate silicon technology to achieve low on-resistance while maintaining fast switching performance: t_D(on) = 10.5 ns, t_r = 5.5 ns, Q_g(10V) = 10–20 nC, and Q_gd = 4.4 nC. Its body diode exhibits V_SD = 0.72–1.0 V and t_rr = 20–45 ns with Q_rr = 160–300 nC under IF = 10 A, dI/dt = 500 A/μs conditions.

Thermally, the device supports junction temperatures up to 175°C, with R_θJC = 3°C/W enabling high-power operation when mounted to a heatsink. Absolute maximum ratings include V_DS = 150 V, V_GS = ±20 V, and repetitive avalanche current I_AR = 8 A (T_A = 25°C), validated per unclamped inductive switching (UIS) test.

Key Specifications

Pinout & Package

Package: TO-220F (full-pack, insulated tab), thermally enhanced plastic case with metal tab electrically connected to the drain. Mounting requires insulating hardware when heatsink is grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP16NF15 and IRF640NPBF, the AOTF454L delivers lower R_DS(ON), guaranteed UIS ruggedness, and TO-220F insulation-enabling smaller heatsinks, higher efficiency, and simplified thermal/mechanical design in 150 V-class power stages.

Availability

AOTF454L is available at Aetrix Electronics and suitable for LED backlighting power supplies, industrial AC-DC adapters, and telecom DC-DC bricks requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AOTF454L 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 power conversion and management.

The AOTF454L belongs to AOS's TrenchFET® Gen IV family, engineered specifically for high-efficiency, high-reliability DC-DC conversion in space-constrained industrial and consumer power systems.

FAQ

What is the maximum continuous drain current rating for the AOTF454L at 100°C case temperature?

The AOTF454L supports 8 A continuous drain current at T_C = 100°C, as specified in the Absolute Maximum Ratings table. This derated value reflects thermal limits of the TO-220F package and ensures safe operation without exceeding the 175°C maximum junction temperature under sustained load conditions. The AOTF454L maintains stable R_DS(ON) performance across this range due to its trench MOSFET structure.

Does the AOTF454L have a fully rated avalanche energy specification (E_AS) in joules?

The AOTF454L datasheet does not publish an absolute E_AS value in joules, but it explicitly states "100% UIS Tested" - confirming that every unit undergoes unclamped inductive switching validation per JEDEC JESD24-1. This ensures the AOTF454L can withstand single-pulse avalanche events typical in boost and flyback converters without failure, even though a numeric E_AS figure is omitted.

Can the AOTF454L be used as a direct replacement for the AOTF452L in existing designs?

No - the AOTF454L is not a direct replacement for the AOTF452L. While both are TO-220F N-Channel MOSFETs from AOS, the AOTF452L is rated for 100 V V_DS and 17 A I_D, whereas the AOTF454L is rated for 150 V V_DS and 13 A I_D. Their R_DS(ON) values and gate charge profiles differ, and layout changes may be needed to accommodate revised voltage and thermal margins in the AOTF454L.

Is the metal tab of the AOTF454L electrically connected to any internal terminal?

Yes - the metal tab of the AOTF454L is internally connected to the drain (D) terminal. As a TO-220F (full-pack insulated) device, the plastic housing provides electrical isolation between the tab and mounting surface, but the tab itself remains at drain potential. Proper insulation hardware must be used if the heatsink is grounded or referenced to a different potential than the drain node.

What is the gate threshold voltage range for the AOTF454L, and how does it affect drive compatibility?

The AOTF454L has a gate threshold voltage (V_GS(th)) range of 3.4 V to 4.6 V at T_J = 25°C. This ensures reliable turn-on with standard 5 V logic or 7–10 V PWM controllers, while avoiding unintended conduction from noise or leakage. The AOTF454L achieves full enhancement (I_D = 10 A) at V_GS = 10 V, making it compatible with industry-standard gate drivers without requiring overvoltage margins.