Latest DrMOS devices set new benchmarks for graphics and gaming

The latest series of DrMOS (driver and MOSFET) devices by Alpha and Omega Semiconductor (AOS) establish new performance benchmarks for high performance graphics add-in cards and gaming notebooks, says the company.

The AOZ531x DrMOS family targets multi-phase voltage regulators (VRs) powering high-performance graphics processor unit (GPU) and memory in desktop add-in graphics cards (AICs) and gaming notebooks. The AOZ531xQI series uses AOS’s latest generation of Gen Alpha MOSFET technology to provide benchmark performance in a 5.0 x 5.0mm QFN package. The series comprises of three DC current levels for multi-phase voltage regulator optimisation.

The AOZ531xQI offers both performance and robustness to support high peak currents common in a GPU multi-phase VR. According to AOS, all devices in the AOZ531xQI family have high peak current capability, up to 120A for 10 microseconds and 80A for 10 milliseconds.

The DrMOS series was developed to meet the needs of graphics in the latest gaming platforms. “The latest GPUs from industry leaders like AMD and Nvidia require the support of high frame rates, ray tracing, and multiple high-resolution screens to offer an immersive gaming experience,” explained Peter Cheng, power IC senior marketing director, at AOS.

“An efficient, robust power stage plays a critical role in a graphics card performance as the heat sink on a high-performance graphics card touches both the GPU as well as the power stages,” he continued. “Cooler operation results in higher peak performance of the card, and directly translates to a better gaming experience.”

The AOZ531xQI family of DrMOS supports both add-in card (12V input) and gaming laptop (20V input) input voltage operating range. There are three performance levels (50A, 60A, and 65A) to allow trade offs in the current/phase and number of phases, with a 2.5 to 20V DC operating range for the AOZ5311, AOZ5312 and AOZ5313QI.

The DC operating range for the AOZ5316, AOZ5317 and AOZ5318QI is 2.5 to 25V.

The AOZ531xQI family is 3.3 and 5V pulse width modulation (PWM) logic compatible and has true high impedance input at PWM when disabled for phase shedding operation.

There is also the ability to enable or disable diode emulation.

Protection includes a thermal warning indicator.

The AOZ531xQI series is immediately available in production quantities with a lead-time of 12 weeks.

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