NCP4200MNR2G Switching Controllers VR11.1 4PH CTRL PMBUS ITF 

Description

The NCP4200 is an integrated power control IC with an I2Cinterface. It combines a highly efficient, multi−phase,

synchronousbuck switching regulator controller with an I2C interface, whichenables digital programming of

key system parameters to optimizesystem performance and provide feedback to the system.

It uses an internal 8−bit DAC to read a Voltage Identification (VID)code directly from the processor, which is used to

set the outputvoltage between 0.375 V and 1.6 V.

This device uses a multi−mode PWM architecture to drive  thelogic−level outputs at a programmable switching

frequency that canbe optimized for VR size and efficiency.

The NCP4200 can beprogrammed to provide 2−, 3−, or 4−phase operation, allowing for theconstruction of up

to four complementary buck−switching stages. TheNCP4200 supports PSI, which is a Power Save Mode.The

NCP4200 includes an I2C interface which can be used toprogram system set points such as voltage offset,

load−line and phasebalance and output voltage. Key system performance data, such asCPU current, CPU

voltage, and power and fault conditions can also beread back over the I2C from the NCP4200.

The NCP4200 operates over the industrial temperature range of−40°C to +125°C and is available in a 40

Lead QFN package.

Features

• Selectable 2−, 3−, or 4−Phase Operation at Up to 1.5 MHz per Phase

• I2C Interface − Enables Digital Programmability of Set Points andRead−back of Monitored Values

• Logic−Level PWM Outputs for Interface to External HighPower Drivers

• Fast−Enhanced PWM for Excellent Load Transient Performance

• Active Current Balancing Between All Output Phases

• Built−In Power−Good/Crowbar Blanking Supports On−The−Fly(OTF) VID Code Changes

• Digitally Programmable 0.375 V to 1.6 V Output Supports BothVR11 and VR11.1 Specifications

• Programmable Short−Circuit Protection with ProgrammableLatchoff Delay

• Supports PSI – Power Saving Mode During Light Loads

Applications

• Desktop PC Power Supplies for VRM Modules