RT8171C Datasheet | Richtek

® Single-Phase Controller with Integrated Driver for VR12.1 Mobile CPU Core Power Supply General Description The RT8171C is a VR12.1 pliant CPU power controller which includes one voltage rails : a 1 phase synchronous buck controller, the CORE VR. The RT8171C has zero load-line function to support zero load-line application. The RT8171C adopts G-NAVPTM (Green Native AVP), which is Richtek's proprietary topology derived from finite DC gain pensator with current mode control, making it an easy to set the PWM controller, meeting all Intel CPU requirements of AVP (Active Voltage Positioning). Based on the G-NAVPTM topology, the RT8171C also Features a quick response mechanism for optimized AVP performance during load transient. The RT8171C supports mode transition function with various operating states. A Serial VID (SVID) interface is built in the RT8171C to municate with Intel VR12.1 pliant CPU. The RT8171C supports VID on-the-fly function with three different slew rates : Fast, Slow and Decay. By utilizing the G-NAVPTM topology, the operating frequency of the RT8171C varies with VID, load and input voltage to further enhance the efficiency even in CCM. The built-in high accuracy DAC converts the SVID code ranging from 0.25V to 1.52V with 5m V per step, as shown in Table 1. The RT8171C integrates a high accuracy ADC for platform setting functions, such as quick response or over current level. The RT8171C provides VR ready output signals. It also Features plete fault protection functions including Over Voltage (OV), Under Voltage (UV), Negative Voltage (NV), Over Current (OC) and Under Voltage Lockout (UVLO). The RT8171C is available in a WQFN-32L 4x4 small foot print package. Features - VR12.1 patible Power Management States - Switching Frequency up to 1MHz - Serial VID Interface - Signal Phase PWM Controller - G-NAVPTM Topology - 0.5% DAC Accuracy - Differential Remote Voltage Sensing - Built-in ADC for Platform Programming - System...