DrMOS power modules use versatile synchronous buck technology

2nd August 2016
Caroline Hayes

Power modules from Alpha and Omega Semiconductor are compliant with Intel’s DrMOS specifications and are designed for high power density voltage regulators for servers, workstations, graphic cards and desktop PC applications.

The AOZ5166QI-01 is housed in a 40pin 6.0 x 6.0mm QFN package that integrates an optimised dual gate driver and two MOSFETs. According to the company, the combination produces a high efficiency DC/DC synchronous buck power stage.

The module uses the company’s proprietary trench MOSFET and packaging technologies to improve efficiency and thermal performance over the previous generation of modules. Continuous engineering innovations are being implemented to reduce switching loss and lower power dissipation that benefit thermal characteristics that lead to higher current driving capability. The low RDS(ON) of low-side MOSFET combined with the low Qg high-side MOSFET achieves an optimal balance between switching and conduction losses to increase overall efficiency by 1%.

The AOZ5166QI-01 is available immediately in production quantities and with minimum VIN of 4.5V and maximum VIN of 16V (AOZ503QI-01) or 25V for the other four modules in the series. PWM logic is 3.3V (AOZ5036QI-01, AOZ5066QI-01 and AOZ5049QI) or 5.0V (AOZ5066QI and AOZ5049QI).

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