Alpha & Omega Semiconductor Inc. AOZ1341EI

Overview

AOZ1341EI from Alpha & Omega Semiconductor is a dual-channel high-side power distribution switch with 70 mΩ N-channel MOSFETs, 1 A continuous current per channel, 2.7–5.5 V input range, and active-low enable logic. It integrates charge-pump gate drive for controlled rise/fall times and is designed for USB port power control in notebook and desktop computers.

For engineers reviewing the AOZ1341EI datasheet, pinout, applications, or equivalent options, key selection criteria include its exposed-pad MSOP-8 thermal performance (60 °C/W ΘJA), open-drain fault flag with 4–15 ms deglitch, reverse current blocking, and thermal shutdown at 135 °C.

Technical Context

The AOZ1341EI implements two independent high-side N-channel MOSFET switches driven by an internal charge pump that operates down to 2.7 V and eliminates external components. Each channel features dedicated enable inputs (EN1/EN2) and open-drain overcurrent flags (OC1/OC2) with blanking time.

It provides integrated protection including current limiting (1.1–1.9 A short-circuit trip), thermal shutdown with 30 °C hysteresis, undervoltage lockout (2.0–2.5 V threshold), and reverse leakage current ≤0.2 μA - all operating across –40 °C to +85 °C ambient.

Key Specifications

Pinout & Package

AOZ1341EI is housed in an Exposed Pad MSOP-8 package (3.0 × 4.9 mm, 0.65 mm pitch) with thermal pad soldered to PCB ground plane for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IPW and TPS2051BDBVR, the AOZ1341EI delivers true dual-channel, thermally optimized power switching in one exposed-pad MSOP-8 package - offering superior integration, lower thermal resistance, and dedicated per-channel fault signaling for USB power management.

Availability

AOZ1341EI is available at Aetrix Electronics and suitable for notebook computers, desktop motherboards, and industrial USB peripheral controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AOZ1341EI 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-efficiency MOSFETs, power ICs, and advanced packaging for power management.

The AOZ1341EI belongs to AOS's dual-channel power distribution switch product line, engineered specifically for USB power delivery in space-constrained, thermally demanding computing platforms.

FAQ

What is the maximum continuous current rating per channel for the AOZ1341EI?

The AOZ1341EI supports 1 A maximum continuous current per channel under recommended operating conditions (T_A ≤ +85 °C, proper PCB thermal design). This rating is validated with the exposed pad soldered to a minimum 100 mm² copper area, and derating applies above 85 °C ambient per the thermal characteristics shown in the datasheet Figure 11.

Does the AOZ1341EI support reverse current blocking, and how is it implemented?

Yes, the AOZ1341EI provides inherent reverse current blocking due to its high-side N-channel MOSFET architecture. When disabled, the internal FET enters high-impedance state, preventing current flow from OUTx back to IN - verified by ≤0.2 μA reverse leakage current at V_OUTx = 5.5 V and IN grounded, per Electrical Characteristics Table on page 3.

How does the charge pump in the AOZ1341EI enable operation down to 2.7 V?

The AOZ1341EI integrates a self-contained charge pump that generates gate drive voltage exceeding the input rail, allowing full enhancement of its N-channel MOSFETs even at V_IN = 2.7 V. No external capacitors or components are needed - this is confirmed in the General Description (page 1) and Detailed Description (page 9) of the datasheet.

What is the purpose of the OC1 and OC2 pins on the AOZ1341EI, and what is their deglitch timing?

OC1 and OC2 are open-drain, active-low fault indicators for channels 1 and 2 respectively. They assert low during overcurrent or thermal shutdown events. Each output includes a deglitch circuit with 4–15 ms blanking time (per Electrical Characteristics table, page 4) to reject transient inrush spikes and ensure reliable fault detection.

Is the AOZ1341EI RoHS compliant and halogen-free?

Yes, the AOZ1341EI is an AOS Green Product: it complies with RoHS directives and uses reduced halogen levels. This is explicitly stated in the Ordering Information section (page 2) and confirmed on AOS's official RoHS compliance webpage referenced in the datasheet.