Multiphase Controller Powers AMD SVI3 CPUs in Graphics, Desktop Systems
The AOZ98252QI two-output, eight-phase controller with low 2.5-mA quiescent power, developed by Alpha and Omega Semiconductor (AOS), features AMD SVI3 high-speed and SMBus digital interfaces. It’s engineered as a key component in a complete system power solution with AOS’s DrMOS products for graphics and desktop systems.
The digital controller offers flexible 8+0 to 4+4 GFX/SOC and Vcore/SOC output rails. It’s designed with the company’s Advanced Transient Modulator (A2TM), which delivers cutting-edge variable-frequency hysteretic peak current-mode control with a proprietary phase-current-sensing scheme. The A2TM feature enables designers to achieve fast response times and optimal current balance for transient and DC loads.
Built to meet the AMD SVI3 2.0 specification, it features an SMBus interface that facilitates application-specific configurations, allowing for settings to be programmed into product registers. These capabilities also reduce the need for manual solder rework during development. Programming is streamlined using the AOS graphical user interface (GUI) or a customized embedded control (EC).
Furthermore, the controller can store register settings during development and when the configuration is finalized.
The AOZ98252QI, housed in a QFN 6x6-52L package, is immediately available in production quantities with a lead time of 12-16 weeks. Unit pricing starts at $2.95 in 1,000-piece quantities.
