NCP81243MNTXG Description

The NCP81243MNTXG is a multi-phase buck solution with user configurations of 3/2/1+ 2/1 phases with the option to perform 4+1. It is optimized for Intel IMVP8 compatible CPUs. To deliver precise regulated power for desktop applications, the controller includes true differential voltage detection, differential inductor DCR current sensing, input voltage feed-forward, and adaptive voltage positioning. Based on Dual-Edge pulse-width modulation (PWM) and DCR current sensing, the control system offers the quickest initial response to dynamic load events at the lowest system cost.

NCP81243MNTXG Features

• Power Saving Phase Shedding

• Vin Feed Forward Ramp Slope

• Over Current Protection (OCP)

• Meets Intel's IMVP8 Specification

• Adaptive Voltage Positioning (AVP)

• One Digital Soft Start Ramp for Both Rails

• Phase-to-Phase Dynamic Current Balancing

• Dual Power Good Output with Internal Delays

• Switching Frequency Range of 200KHz – 1.5MHz

• Dual High Performance Operational Error Amplifier

• Dynamic Reference Injection? (Patent #US07057381)

• “Lossless” DCR Current Sensing for Current Balancing

• DAC with Droop Feed-forward Injection(Patent Pending)

• Startup into Pre-Charged Loads while avoiding False OVP

• Summed Compensated Inductor Current Sensing for Droop

• Over Voltage Protection (OVP) & Under Voltage Protection (UVP)

• Accurate Total Summing Current Amplifier(Patent #US006683441)

• True Differential Current Balancing Sense Amplifiers for Each Phase

• Dual High Impedance Differential Voltage and Total Current Sense Amplifiers

• Current Mode Dual Edge Modulation for Fast Initial Response to Transient Loading

NCP81243MNTXG Applications

• Automotive

• Personal electronics

• Communications equipment