Buck regulators meet Intel’s Tiger Lake processor support to slim computers

Alpha and Omega Semiconductor (AOS) have introduced two application-specific EZBuck regulators, the AOZ2264VQI and AOZ2369VQI. They support VCCIN_AUX rails in Intel Tiger Lake platforms used in notebook and desktop computing systems.

Intel’s Tiger Lake platform consists of two rails. one powers the core and graphics processors, and the other (VCCIN_AUX) powers the auxiliary processor which supports add-on features in personal computing systems such as audio, video and connectivity, which require a VCC_AUX rail with high currents. A typical competiting power implementation requires either a controller with external discrete power FETs or a dual-phase converter, both of which require more board space than either the AOZ2264VQI and AOZ2369VQI which include all the power silicon in a single QFN 4 x 4mm package for 16A (AOZ2264VQI) or QFN 5 x 5mm package for 30A (AOZ2369VQI).

The two converters include features specifically designed to meet the specifications of the Intel Tiger Lake platform. The 2-bit VID pins allow the VCCIN_AUX power rail to adjust with voltage for 0V, 1.1V, 1.65V, and 1.8V depending on multiple systems operating modes. Both devices have also passed all the validation requirements included in the Intel Tiger Lake Platform Component List (PCL) to ensure compliance with Intel specifications. AOS’s proprietary COT architecture provides fast load transient response performance and enables stable and low voltage ripple operation with small ceramic capacitors, adds AOS.

The AOZ2264VQI and AOZ2369VQI have a wide input voltage range of 4.0 to 28V and low RDS (on) internal NFETs. In addition to constant on-time with input feed-forward and ripple reduction at light load, the converters have an integrated bootstrap diode and cycle-by-cycle current limit. Protection includes short-circuit protection, overvoltage protection and thermal shutdown.

“The two current capabilities offered by the AOZ2264VQI and the AOZ2369VQI offer designers a scalable solution to support Intel Tiger Lake’s multiple platform SKUs such as UP3, UP4, and H-Line, said Wayne Lee, Power IC Marketing at AOS. “In state-of-the-art laptops, the system board has shrunk considerably to make way for system fans for thermal management or larger batteries to improve battery life. Form factors for personal computers are always shrinking. Utilising AOS’s EZBuck regulator platform technology enables AOS to solve the system designer’s problem of ever-shrinking PCB real estate,” he concluded.

Alpha and Omega Semiconductor is a designer, developer, and global supplier of a broad range of power semiconductors, including a wide portfolio of power MOSFET, IGBT, IPM, power IC, and digital power products. AOS has developed extensive intellectual property and technical knowledge which enables the company to introduce products to address the increasingly complex power requirements of advanced electronics. AOS differentiates itself by integrating its discrete and IC semiconductor process technology, product design, and advanced packaging expertise to develop high-performance power management solutions AOS’s portfolio of products targets high-volume applications, including portable computers, flat-panel TVs, LED lighting, smartphones, battery packs, consumer and industrial motor controls, automotive electronics, and power supplies for TVs, computers, servers, and telecommunications equipment.


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