NCP81274

NCP81274 8/7/6/5/4/3/2/1 Phase Buck Controller with PWM_VID and I2C Interface The NCP81274 is a multiphase synchronous controller optimized for new generation computing and graphics processors. The device is capable of driving up to 8 phases and incorporates differential voltage and phase current sensing, adaptive voltage positioning and PWM_VID interface to provide and accurately regulated power for computer or graphic controllers. The integrated power saving interface (PSI) allows for the processors to set the controller in one of three modes, i.e. all phases on, dynamic phases shedding or fixed low phase count mode, to obtain high efficiency in light-load conditions. The dual edge PWM multiphase architecture ensures fast transient response and good dynamic current balance. Features Compliant with NVIDIA® OVR4+ Specifications Supports Up to 8 Phases 4.5 V to 20 V Supply Voltage Range 250 kHz to 1.2 MHz Switching Frequency (8 Phase) Power Good Output Under Voltage Protection (UVP) Over Voltage Protection (OVP) Over Current Protection (OCP) Per Phase Over Current Protection Startup into Pre-Charged Loads while Avoiding False OVP Configurable Adaptive Voltage Positioning (AVP) High Performance Operational Error Amplifier True Differential Current Balancing Sense Amplifiers for Each Phase Phase-to-Phase Dynamic Current Balancing Current Mode Dual Edge Modulation for Fast Initial Response to Transient Loading Power Saving Interface (PSI) Automa...