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NCP81243: Multi-Phase Buck Controller for IMVP8

Datasheet: Dual Output 3 and 2 Phase Controller with Single Intel Proprietary Interface for Desktop and Notebook CPU Applications
Rev. 2 (335kB)
Product Overview
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The NCP81243 is a Multi-Phase buck solution is optimized for Intel IMVP8 compatible CPUs with user configurations of 3/2/1+ 2/1 phases, including an option to do 4+1. The controller combines true differential voltage sensing, differential inductor DCR current sensing, input voltage feed-forward, and adaptive voltage positioning to provide accurate regulated power for Desktop applications. The control system is based on Dual-Edge pulse-width modulation (PWM) combined with DCR current sensing providing the fastest initial response to dynamic load events at reduced system cost.
Features
 
  • Meets Intel's IMVP8 Specification
  • Current Mode Dual Edge Modulation for Fast Initial Response to Transient Loading
  • Dual High Performance Operational Error Amplifier
  • One Digital Soft Start Ramp for Both Rails
  • Dynamic Reference Injection® (Patent #US07057381)
  • Accurate Total Summing Current Amplifier(Patent #US006683441)
  • DAC with Droop Feed-forward Injection(Patent Pending)
  • Dual High Impedance Differential Voltage and Total Current Sense Amplifiers
  • Phase-to-Phase Dynamic Current Balancing
  • “Lossless” DCR Current Sensing for Current Balancing
  • Summed Compensated Inductor Current Sensing for Droop
  • True Differential Current Balancing Sense Amplifiers for Each Phase
  • Adaptive Voltage Positioning (AVP)
  • Switching Frequency Range of 200KHz – 1.5MHz
  • Startup into Pre-Charged Loads while avoiding False OVP
  • Vin Feed Forward Ramp Slope
  • Over Voltage Protection (OVP) & Under Voltage Protection (UVP)
  • Over Current Protection (OCP)
  • Dual Power Good Output with Internal Delays
Applications
  • Industrial Servers
  • Embedded Systems Power Management
Technical Documentation & Design Resources
Data Sheets (1) Package Drawings (1)
Availability & Samples
Specifications
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP81243MNTXG Active
Pb-free
Halide free
NCP81243, Industrial Temp Range IMVP8 3+2, Notebook & Desktop 2 Rail Controller QFN-52 485BE 1 260 Tape and Reel 2500 $1.2
Market Leadtime (weeks) : 4 to 8

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Phases
Control Mode
VCC Min (V)
VCC Max (V)
fSW Typ (kHz)
Package Type
NCP81243MNTXG  
 $1.2 
Pb
H
 Active   
Step-Down
1/2/3
Voltage Mode
4.75
5.25
300 - 1200
QFN-52
Case Outlines
485BE   
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