Digital multi-phase controller is “most flexible” DC/DC controller

The first product in Alpha and Omega Semiconductor’s Digital Controller portfolio, the AOZ97774QE is designed for telecoms but can also be used for general purpose applications.

It is a dual output 3+1 phase digital VCOT controller with pin strap selectable device configurations. The single device can support multiple platforms, added Alpha and Omega Semiconductor (AOS).

The AOZ97774QE is claimed to be the industry’s most flexible DC/DC controller supporting 5G wireless, networking, optical communication and general purpose DC/DC applications. It is offered in a QFN 5.0 x 5.0mm package.

It provides DC/DC power conversion from the 12V power rail to point of load (PoL) voltage for all main subsystems of the 5G wireless network, including control unit, digital unit and radio unit (CU, DU, and RU) platforms.  The AOZ97774QE can be used for all 12V input applications where multi-phase power is required, and the main output is three phases or less.  The CU, DU and RU are all critical subsystems that require the higher power that is supported with the AOZ97774QE and AOS Power Stages.  The AOZ97774 offers up to 15 stored pin-strapped configurations, which is significantly more stored configurations than other solutions on the market, said AOS. The multiple configurations allow for the one controller to behave as 15 separate power designs minimising product management, faster system design, and easier logistics control. The controller also has NVM configuration, with 1,000 times read/write capability, which is also provided for maximum flexibility. This is particularly useful during the system bring-up and debug process, saving time and improving the reliability of results, AOS added.

The AOZ97774QE also includes features specifically designed to meet the specifications of the Intel VR13 infrastructure applications.  The controller has the SVID digital high speed interface where required.

The controller supports the high accuracy IMON/TMON input for use with AOS or other brand smart power stages. (The recommended companion SPS products are AOZ5276, AOZ5273, and AOZ5277.) Using the AOZ5276 (80A peak current) SPS, 240A peak can be supported with the three-phase output and 80A peak on the 2nd output. The typical application DC current load per phase is in the range of 25-50A.

Powered by a single 3.3V supply the controller provides output voltage with 0.5 per cent accuracy.  AOS’s proprietary Digital COT architecture provides ultra-fast load transient response and enables stable and low voltage ripple operation with small-sized ceramic capacitors, further reducing solution size and cost.

The AOZ97774QE is available in production quantities with a lead-time of 12 weeks.

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