Infineon Technologies IAUS300N08S5N011ATMA1

Overview

IAUS300N08S5N011ATMA1 from Infineon Technologies is an N-channel enhancement-mode OptiMOS™-5 power MOSFET designed for high-current automotive switching applications. It delivers 300 A continuous drain current at T_C = 85 °C, features 1.1 mΩ R_DS(on) at V_GS = 10 V, and supports 80 V V_DS with 175 °C maximum junction temperature - deployed in 48 V mild-hybrid DC-DC converters and electric power steering motor drivers.

For engineers reviewing the IAUS300N08S5N011ATMA1 datasheet, IAUS300N08S5N011ATMA1 pinout, IAUS300N08S5N011ATMA1 application, or IAUS300N08S5N011ATMA1 equivalent, key selection criteria include its AEC-Q101 qualification beyond standard requirements, 100% single-pulse avalanche testing, MSL1 reflow compatibility up to 260 °C, and thermal resistance of 0.4 K/W (junction-to-case).

Technical Context

This device operates as a unidirectional high-side or low-side switch in automotive power stages, leveraging trench-based silicon technology optimized for low conduction and switching losses. Its gate threshold voltage (2.2–3.8 V) enables robust TTL/CMOS-level drive compatibility, while the 178–231 nC total gate charge balances switching speed and driver stress.

The integrated body diode exhibits 0.9–1.2 V forward voltage at 100 A and 25 °C, with 86 ns reverse recovery time and 177 nC Q_rr, supporting synchronous rectification and freewheeling in hard-switched topologies. Thermal design is anchored by a PG-HSOG-8-1 package with direct copper tab cooling and 0.4 K/W R_thJC.

Key Specifications

Pinout & Package

PG-HSOG-8-1 is a surface-mount, thermally enhanced 8-pin SO package with exposed copper drain tab (Pin 1–7: source/gate terminals; Pin 8: gate; Tab: drain). The layout supports dual-side cooling and high-current PCB routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current automotive MOSFET applications.

Compared with IAUC300N08S5N011ATMA1, this part trades 0.1 K/W higher thermal resistance for isolation; versus IPB180N08S5H5ATMA1, it delivers +67% current capacity and −39% conduction loss at identical footprint - justifying premium cost in high-power modules.

Availability

IAUS300N08S5N011ATMA1 is available at Aetrix Electronics and suitable for electric power steering, 48 V mild-hybrid DC-DC conversion, and on-board charger output stages requiring stable component supply across automotive production lifecycles.

Supply support for IAUS300N08S5N011ATMA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power, sensor, and automotive ICs, with global R&D and wafer fabrication facilities.

This device belongs to the OptiMOS™-5 automotive power MOSFET product line, engineered specifically for high-current, high-reliability 12 V–48 V vehicle electrification systems demanding AEC-Q101 compliance and extended temperature operation.

FAQ

What is the maximum allowable gate-source voltage for IAUS300N08S5N011ATMA1?

The absolute maximum V_GS is ±20 V, with recommended operating range limited to −10 V to +15 V for long-term reliability. Exceeding +15 V risks accelerated gate oxide degradation, especially at elevated temperatures; the 10 V drive used in datasheet characterization ensures optimal R_DS(on) and safe margin against overshoot.

Does IAUS300N08S5N011ATMA1 require a negative gate voltage for fast turn-off?

No, it does not require negative gate drive. With a typical gate threshold of 3.0 V and plateau voltage of 4.5 V, standard 0 V to 10 V or 0 V to 12 V gate drivers suffice. A −5 V to 0 V turn-off bias may reduce fall time by ~15%, but is unnecessary for most automotive PWM frequencies below 100 kHz.

Can IAUS300N08S5N011ATMA1 be paralleled with identical units without external gate resistors?

No. Even matched units exhibit parametric variation in threshold voltage and transconductance, risking current imbalance. Each device must use individual gate resistors (≥2.2 Ω) and symmetrical PCB layout to ensure <10% current sharing error at 300 A. Kelvin source connections are strongly recommended.

Is the drain tab electrically isolated from the package substrate?

No. The drain tab is metallurgically bonded directly to the silicon die's drain region and is not insulated. It must be mounted to an electrically grounded heatsink or isolated via insulating thermal interface material if system grounding architecture requires it - unlike the IAUC variant which features an isolated tab.