Alpha & Omega Semiconductor Inc. AOB360A70L

Overview

AOB360A70L from Alpha & Omega Semiconductor is a 700V, N-channel enhancement-mode MOSFET in TO-263 (D2PAK) package, featuring R_DS(ON) ≤ 0.36 Ω at V_GS = 10 V, 48 A pulsed drain current, and 22.5 nC total gate charge. It delivers rugged unclamped inductive switching (UIS) performance and is optimized for flyback SMPS in PD adapters and lighting.

For engineers reviewing the AOB360A70L datasheet, pinout, applications, or equivalent options, key selection criteria include its 700 V BVDSS rating, 0.36 Ω RDS(ON), 22.5 nC Qg, TO-263 thermal performance (R_θJC = 0.8 °C/W), and body diode reverse recovery time of 310 ns.

Technical Context

This MOSFET employs Alpha & Omega's proprietary aMOS5™ technology to achieve low conduction loss and enhanced switching efficiency. Its gate threshold voltage (3.4–4.6 V) ensures reliable turn-on with standard 5 V or 10 V drivers, while the 2 Ω gate resistance supports controlled dv/dt and EMI optimization.

The device features a robust body diode with 12 A continuous and 48 A pulsed current capability, 310 ns reverse recovery time, and 4.8 mC Q_rr, enabling stable operation in hard-switched flyback converters without external snubbers. Thermal design is supported by R_θJC = 0.8 °C/W and R_θJA = 65 °C/W (TO-263 on 1-in² 2-oz copper).

Key Specifications

Pinout & Package

AOB360A70L uses the TO-263 (D2PAK) surface-mount package with exposed drain pad for thermal and electrical performance. The three terminals are arranged in G–D–S order (left to right, front view, tab facing up).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP7NK80ZFP and IPP60R190C7, the AOB360A70L offers superior power density (TO-263), optimal 700 V rating for global AC input, and lowest RDS(ON) × Qg trade-off among 700+ V alternatives-making it ideal for space-constrained, high-efficiency PD adapters and lighting drivers.

Availability

AOB360A70L is available at Aetrix Electronics and suitable for PD adapters, LED lighting drivers, and TV auxiliary power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for AOB360A70L 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 AOB360A70L belongs to AOS's aMOS5™ high-voltage MOSFET product line, engineered specifically for high-efficiency, high-density offline SMPS in USB-C PD, LED lighting, and consumer power supplies.

FAQ

What is the maximum continuous drain current rating for AOB360A70L at TC = 25°C?

The AOB360A70L has a continuous drain current (ID) rating of 7.6 A at case temperature TC = 25°C. This value is thermally limited-not silicon-limited-and scales with case temperature per the derating curve in the datasheet. At TC = 100°C, the usable ID drops to approximately 3.4 A. Designers must verify thermal design using RθJC = 0.8 °C/W and ensure heatsink interface resistance does not exceed 0.5 °C/W for target power levels.

Does AOB360A70L support gate drive from a 5 V controller?

The AOB360A70L has a gate threshold voltage (VGS(th)) range of 3.4–4.6 V, so it will turn on with a 5 V gate drive-but not fully enhance. For guaranteed RDS(ON) ≤ 0.36 Ω, VGS must be ≥ 10 V. Using 5 V drive results in significantly higher on-resistance (≥1.2 Ω), excessive conduction loss, and thermal runaway risk. Always pair AOB360A70L with a 10–12 V gate driver stage.

Is AOB360A70L suitable for synchronous rectification in the secondary side of a flyback converter?

No-AOB360A70L is an N-channel high-side primary switch, not a low-side synchronous rectifier. Its 700 V BVDSS and body diode characteristics are optimized for primary-side switching, not secondary-side conduction. For synchronous rectification, use dedicated low-VF, low-Qrr N-channel MOSFETs such as AON6254 (30 V) or AOT20N60 (600 V) with appropriate gate drive timing.

What is the meaning of "100% Rg tested" for AOB360A70L?

"100% Rg tested" means every unit of AOB360A70L undergoes production test verifying its gate resistance is 2 Ω ±15%, ensuring consistent switching speed, dv/dt control, and EMI behavior across all lots. This screening eliminates outliers that could cause gate oscillation or shoot-through in high-frequency QR flyback designs, directly supporting robust mass production.

Can AOB360A70L replace AOT360A70L in an existing TO-220 layout?

No-AOB360A70L uses TO-263 (D2PAK) packaging, while AOT360A70L uses TO-220. Their footprints, thermal pad configurations, and mechanical mounting differ fundamentally. Direct replacement would require PCB redesign, new stencil, and requalification. For drop-in replacement, select AOT360A70L or AOTF360A70L (TO-220F). AOB360A70L is intended for surface-mount, high-power-density applications where TO-263 thermal advantages are leveraged.