Buck regulators support Intel Tiger Lake for notebook and desktop computing

The AOZ2264VQI and AOZ2369VQI buck regulators have adjustable output voltage capability using 2-bit voltage identification (VID) for a high power density to support Intel’s dual rail Tiger Lake platform. Input voltage range is 4.0 to 28V.

The buck regulators are offered in a QFN 4 x 4 (AOZ2264VQ) and QFN 5 x 5 package (AOZ2369VQI). They are claimed to offer the industry’s most compact footprint to support VCCIN_AUX rails in Intel Tiger Lake platforms which are used in notebook and desktop computing systems.

“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.

Intel designed Tiger Lake with a rail to power the core and graphics processors, and a VCCIN_AUX rail to power the auxiliary processor. It is this auxiliary processor which supports add-on features in PCs, such as audio, video and connectivity. These typically require a VCC_AUX rail with high currents.

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.

A typical solution is to use either a controller with external discrete power FETs or a dual-phase converter but both of these require more board space.

The AOZ2264VQI and AOZ2369VQI integrate all the power silicon in a single QFN 4 x 4 package for 16A and QFN 5 x 5 package for 30A.

The regulators are also equipped with cycle-by-cycle current limit, thermal shutdown, short-circuit protection and over-voltage protection.

Both buck regulators have passed all the validation requirements included in the Intel Tiger Lake Platform Component List (PCL). Alpha and Omega’s proprietary COT architecture is claimed to provide fast load transient response performance and enable stable and low voltage ripple operation with small ceramic capacitors, contributing to size and cost reductions. The space gained can be used to accommodate a system fan for thermal management, or a larger battery to extend the computer’s operating time.