Dual Channel PWM Controller with I2C Interface Control for IMVP9.1 CPU Core Power Supply

The RT3628AE is a synchronous buck controller which supports 2 output rails and can fully meet Intel IMVP9.1 requirements. The RT3628AE adopts G-NAVP^TM (Green Native AVP) which is Richtek′s proprietary topology derived from finite DC gain of EA amplifier with current mode control, making it easy to set the droop to meet all Intel CPU requirements of AVP (Adaptive Voltage Positioning). Based on the G-NAVP^TM topology, the RT3628AE features a new generation of quick response mechanism (Adaptive Quick Response, AQR) to optimize AVP performance during load transient and reduce output capacitors. The RT3628AE integrates a high accuracy ADC for platform and function settings, such as ICCMAX, switching frequency, overcurrent threshold and AQR trigger level. The RT3628AE provides VR Ready and thermal indicators. It also features complete fault protection functions, including overvoltage (OV), undervoltage (UV), overcurrent (OC) and undervoltage lockout (UVLO). The RT3628AE supports several functions which can be set by I²C interface, like thermal balance adjustment, dynamic load line, voltage offset setting, fix VID setting, protection report, protection disable and Current/PSYS/Temperature report. The recommended junction temperature is -40°C to 125°C.