NCP81105HMNTXG datasheet(1/36 Pages) ONSEMI

Part #	NCP81105HMNTXG

Description	DrMOS Supporting 1/2/3 Phase Power Controller

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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October, 2013 − Rev. 2

1

Publication Order Number:

NCP81105/D

NCP81105, NCP81105H

DrMOS Supporting, 1/2/3

Phase Power Controller

with SVID Interface for

Desktop and Notebook

VR12.5 & VR12.6 CPU

Applications

The NCP81105 is a DrMOS supporting controller optimized for

Intel

® VR12.5 & VR12.6 compatible CPUs. The controller combines

true differential voltage sensing, differential inductor DCR current

sensing, input voltage feed−forward, and adaptive voltage positioning

to provide accurately regulated power for both Desktop and Notebook

CPU applications. The control system is based on Dual−Edge

pulse−width modulation (PWM), to provide the fastest initial response

to dynamic load events plus reduced system cost. The NCP81105 is

compatible with DrMOS type power stages such as NCP5367,

NCP5368, NCP5369 and NCP5338.

The NCP81105’s output can be configured to operate in single phase

during light load operation − improving overall system efficiency. A

high performance operational error amplifier is provided to simplify

compensation of the system. Patented Dynamic Reference Injection

further simplifies loop compensation by eliminating the need to

compromise between closed−loop transient response and Dynamic

VID performance. Patented Total Current Summing provides highly

accurate current monitoring for droop and digital current monitoring.

Features

• Meets Intel’s VR12.5 Specifications

• Implements VR12.6 PS4 State and SVID Reporting

• Mixed Voltage/Current Mode, Dual Edge Modulation

for Fastest Initial Response to Transient Loading

• High Impedance Differential Voltage Amplifier

• High Performance Operational Error Amplifier

• High Impedance Total Current Sense Amplifier

• True Differential Current Sense Amplifiers for

Balancing Current in Each Phase

• Digital Soft Start Ramp

• Dynamic Reference Injection

• Accurate Total Summing Current Amplifier

• “Lossless” Inductor DCR Current Sensing

• Summed, Thermally Compensated Inductor Current

Sensing for Adaptive Voltage Positioning (AVP)

• 48 mV/ms Fast Output Slew Rate (NCP81105)

• 10 mV/ms Fast Output Slew Rate (NCP81105H)

• Programmable Slow Slew Rates as a Fraction of Fast

Slew Rate

• Reduced Enable to First SVID Command Latency

• Phase−to−Phase Dynamic Current Balancing

• Switching Frequency Range of 280 kHz to 1.5 MHz

• Starts up into Pre−Charged Loads while Avoiding False

OVP

• Compatible with DrMOS Power Stages

• Power−saving Phase Shedding

• Vin Feed−forward Ramp Slope Compensation

• Pin Programming for Internal SVID parameters

• Output Over Voltage Protection (OVP) & Under

Voltage Protection (UVP)

• Over Current Protection (OCP)

• Power Good Output with Internal Delays

• This is a Pb−Free Device

Applications

• Desktop and Notebook Microprocessors

MARKING

DIAGRAM

http://onsemi.com

See detailed ordering and shipping information in the package

dimensions section on page 35 of this data sheet.

ORDERING INFORMATION

QFN36

CASE 485CC

A

= Assembly Location

WL

= Wafer Lot

YY

= Year

WW

= Work Week

G

= Pb−Free Package

36

1

NCP

81105

AWLYYWWG

1

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