Alpha & Omega Semiconductor Inc. AOZ8205DI

Overview

AoZ8205DI from Alpha & Omega Semiconductor is a dual-channel N-channel MOSFET in a 8-pin DFN package, rated for 20 V V_DS, 7 A continuous drain current per channel, and 25 mΩ typical R_DS(on) at V_GS = 4.5 V. It serves as a load switch or battery protection FET in portable power management circuits.

For engineers reviewing the AOZ8205DI datasheet, pinout, applications, or equivalent options, key selection criteria include dual-N-channel configuration, low on-resistance matching between channels, thermal performance in DFN-8 (3×3 mm), and compliance with halogen-free packaging requirements per AOS Green Policy.

Technical Context

The AOZ8205DI integrates two matched N-channel enhancement-mode MOSFETs in a single die with shared source terminals, enabling synchronous rectification or dual-path switching in compact DC-DC converters and battery protection IC interfaces. Its gate threshold voltage (V_GS(th)) ranges from 0.5 V to 1.2 V, supporting direct logic-level drive from 1.8 V or 3.3 V controllers.

Thermal resistance (R_θJA) is 45 °C/W under standard JEDEC 2S2P board conditions, and the device features 100% ESD tested HBM rating of ±2 kV. It operates over -55 °C to +150 °C junction temperature range and meets AOS's halogen-free material specification (<900 ppm Br, <900 ppm Cl, total Br+Cl <1500 ppm).

Key Specifications

Pinout & Package

AOZ8205DI is housed in an 8-pin DFN package with exposed thermal pad (3.0 × 3.0 × 0.8 mm). The package supports solder reflow per JEDEC J-STD-020 and requires controlled thermal relief for the exposed pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-N-channel load switch applications.

Compared with Si8205AD-D-RA and DMN2020LSD-13, the AOZ8205DI delivers lower on-resistance and superior thermal performance in a halogen-free DFN-8 package, making it optimal for space- and efficiency-critical portable power systems where gate drive voltage may fall below 2.0 V.

Availability

AoZ8205DI is available at Aetrix Electronics and suitable for smartphone battery protection, USB-C power delivery switching, wireless earbud charging cases, and portable SSD power management requiring stable component supply and halogen-free compliance.

Supply support for AOZ8205DI 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, and industrial markets.

The AOZ8205DI belongs to AOS's Green Dual-FET product line, designed specifically for compact, energy-efficient battery protection and load switching in portable electronics with strict environmental compliance requirements.

FAQ

What is the maximum operating junction temperature for AOZ8205DI?

The AOZ8205DI has a specified maximum junction temperature of +150 °C. This rating is validated under steady-state thermal conditions with the exposed pad properly soldered to a 1-in² 2-oz copper thermal pad on a standard FR-4 PCB. Operation beyond this limit risks permanent parametric shift or bond wire failure. Derating curves in the official AOZ8205DI datasheet define safe current limits versus ambient temperature and airflow conditions.

Does AOZ8205DI support true bidirectional current flow?

No, the AOZ8205DI does not support true bidirectional current flow in a single channel. Each N-channel MOSFET conducts only from drain to source when the gate is biased above threshold. However, the dual configuration enables back-to-back connection (e.g., source-to-source) to block reverse current - a common topology in battery protection circuits. This arrangement requires external gate control logic and is explicitly supported in AOZ8205DI's pinout and R_DS(on) matching.

Is AOZ8205DI pin-compatible with AOZ8205AI?

No, AOZ8205DI is not pin-compatible with AOZ8205AI. The AOZ8205AI uses a TSOP-8 package with different pin assignments and thermal characteristics. While both share identical electrical specifications, the AOZ8205DI's DFN-8 package relocates the exposed thermal pad to the center-bottom and consolidates source terminals differently. PCB layout and stencil design must be revised when migrating between these variants.

What is the gate charge (Q_g) of AOZ8205DI at V_GS = 4.5 V?

The total gate charge (Q_g) of AOZ8205DI is 12 nC per channel at V_GS = 4.5 V, as measured under standard test conditions (V_DS = 10 V, I_D = 5 A). This value determines switching speed and driver strength requirements: a 1-A gate driver can fully charge both gates in under 25 ns. Q_g is critical for calculating switching losses in high-frequency load switching applications such as USB PD power path control.

How does the halogen-free status of AOZ8205DI affect its reliability in humid environments?

The halogen-free construction of AOZ8205DI - with bromine and chlorine limited to <900 ppm each - eliminates corrosive decomposition products under high-temperature/humidity stress. Accelerated testing per JESD22-A101 shows no increase in leakage current or parameter drift after 1000 hours at 85 °C/85% RH. This makes AOZ8205DI suitable for sealed consumer devices where long-term moisture exposure could degrade halogen-containing molding compounds.