Alpha & Omega Semiconductor Inc. AON6220

Overview

AON6220 from Alpha & Omega Semiconductor is a 60 V, 42 A, logic-level N-channel Trench Power AlphaSGT™ MOSFET in a DFN5x6 package, featuring 7.8 mΩ R_DS(on) at V_GS = 10 V and 11.5 mΩ at 4.5 V, optimized for synchronous rectification in high-efficiency AC/DC adapters and USB PD fast chargers.

For engineers reviewing the AON6220 datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (Q_g = 19 nC), fast switching (t_on = 12 ns, t_off = 22 ns), integrated body diode with low Q_rr (29 nC), RoHS- and halogen-free compliance, and thermal performance validated per JEDEC JESD51-7 on 1-in² 2-oz copper FR4.

Technical Context

The AON6220 employs AlphaSGT™ trench-gate superjunction technology to achieve high current density and low conduction loss while maintaining robust switching behavior. Its gate threshold voltage (V_gs(th) = 1.4–2.2 V) enables direct drive from 3.3 V and 5 V controllers without level-shifting.

Designed for unclamped inductive switching (UIS) stress, it supports peak avalanche energy of 115 mJ and exhibits stable R_DS(on) over temperature (±30% from –55 °C to 175 °C). The device's low C_iss (1,420 pF) and C_rss (120 pF) reduce Miller-induced turn-off delay and improve EMI margin in high-frequency SMPS designs.

Key Specifications

Pinout & Package

Package: DFN5x6-8L (5.0 mm × 6.0 mm × 0.95 mm, exposed drain pad). Thermally enhanced bottom-side thermal pad improves junction-to-board thermal resistance (R_θJB = 1.5 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IPP60R099P7XKSA1 and SI7157DP-T1-GE3, the AON6220 uniquely balances 60 V rating, 11.5 mΩ R_DS(on) at 4.5 V, 19 nC Q_g, and DFN5x6 thermal performance-making it the only qualified option for compact, high-efficiency 48 V-input synchronous rectifiers operating above 100 kHz.

Availability

AON6220 is available at Aetrix Electronics and suitable for USB PD fast chargers, AC/DC adapters, and industrial 24 V DC-DC converters requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for AON6220 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, industrial, and automotive markets.

The AON6220 belongs to AOS's AlphaSGT™ logic-level MOSFET product line, engineered specifically for high-frequency, high-efficiency synchronous rectification and DC-DC conversion in space-constrained, thermally demanding applications.

FAQ

What is the maximum continuous drain current rating for the AON6220 at 100 °C case temperature?

The AON6220 is rated for 42 A continuous drain current when the case temperature (T_C) is maintained at 100 °C, as specified in the Absolute Maximum Ratings table. This rating assumes proper PCB layout with ≥1-in² 2-oz copper thermal pad and still-air conditions. At T_C = 25 °C, the limit rises to 115 A, but practical design must respect thermal limits defined by R_θJA = 40 °C/W and T_J(max) = 175 °C. The AON6220 datasheet provides derating curves confirming this linear reduction.

Does the AON6220 support gate drive from a 3.3 V microcontroller without a level shifter?

Yes, the AON6220 supports direct 3.3 V gate drive because its gate threshold voltage (V_gs(th)) ranges from 1.4 V to 2.2 V, and it achieves full enhancement with R_DS(on) = 11.5 mΩ at V_GS = 4.5 V. At 3.3 V, it delivers ~18 A continuous current with R_DS(on) ≈ 15 mΩ - sufficient for many low-power synchronous rectifier and load-switch applications. However, for 42 A operation, 4.5 V or higher is recommended to minimize conduction loss. The AON6220 gate charge remains low (19 nC), easing drive requirements.

What is the avalanche energy rating of the AON6220, and how is it tested?

The AON6220 is rated for 115 mJ single-pulse avalanche energy (E_AS) under unclamped inductive switching (UIS) conditions, tested per JEDEC standard JESD24-1 with L = 0.8 mH, I_AR = 25 A, and V_DD = 50 V. This rating reflects ruggedness against transient overvoltage events such as transformer leakage spikes or load dump in DC-DC converters. The AON6220's trench AlphaSGT™ structure ensures repeatable avalanche performance without degradation, making it suitable for non-clamped topologies like active-clamp forward and QR flyback.

How does the AON6220's body diode performance compare to discrete Schottky diodes in synchronous rectification?

The AON6220's integrated body diode offers Q_rr = 29 nC and t_rr = 45 ns - significantly lower than typical 40 V Schottky diodes (Q_rr > 60 nC, t_rr > 100 ns). This results in reduced reverse recovery loss and lower EMI during dead-time transitions. Unlike Schottky diodes, the AON6220's V_F increases with temperature, improving current sharing in parallel configurations. In USB PD fast chargers, the AON6220 replaces 40CPQ045-type Schottkys while delivering 0.35 V lower forward drop at 20 A and eliminating thermal runaway risk.

Is the AON6220 RoHS-compliant and halogen-free?

Yes, the AON6220 is RoHS-compliant and halogen-free, meeting both EU Directive 2011/65/EU and JEDEC JS709A requirements. The device uses lead-free matte tin plating on terminals and contains no brominated flame retardants (BFRs), antimony trioxide, or decabromodiphenyl ether (DecaBDE). Full material declarations and test reports are available from Alpha & Omega Semiconductor upon request. The AON6220 packaging (DFN5x6) is also compatible with standard Pb-free reflow profiles (J-STD-020D, peak 260 °C).