Device Information
 
 
ISL6566A Printer Friendly Version
 
Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal
 
Datasheets,
Related Docs
& Simulations		DescriptionKey
Features		Parametric
Data		Application
Diagrams		Related
Devices
 
 
Ordering Information
 iBuy direct from Intersil  iBuy direct - out of stock  Request samples
 Check distributor inventory Green/Pb(Lead free) Device  Available in RoHS/Pb-Free  
Part No. Design-In
Status		 Temp. Package MSL Price
US $		 PB Free
ISL6566ACRZ Active Comm 40 Ld QFN 4 1.93 PB Free Out of stock Disti-Buy Sample
ISL6566ACRZ-T Active Comm 40 Ld QFN T+R 4 1.93 PB Free Disti-Buy  
ISL6566AIRZ Active Ind 40 Ld QFN 4 2.02 PB Free Disti-Buy Sample
ISL6566AIRZ-T Active Ind 40 Ld QFN T+R 4 2.02 PB Free Disti-Buy  
ISL6566ACR InActive Comm 40 Ld QFN 2 N/A      
ISL6566ACR-T InActive Comm 40 Ld QFN T+R 2 N/A      
ISL6566ACRZA InActive Comm 40 Ld QFN 4 N/A PB Free    
ISL6566ACRZA-T InActive Comm 40 Ld QFN T+R 4 N/A PB Free    
ISL6566AIR InActive Ind 40 Ld QFN 2 N/A      
ISL6566AIR-T InActive Ind 40 Ld QFN T+R 2 N/A      
ISL6566AIRZA InActive Ind 40 Ld QFN 4 N/A PB Free    
ISL6566AIRZA-T InActive Ind 40 Ld QFN T+R 4 N/A PB Free    
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing
 
  Description

The ISL6566A three-phase PWM control IC provides a precision voltage regulation system for advanced microprocessors. The integration of power MOSFET drivers into the controller IC marks a departure from the separate PWM controller and driver configuration of previous multiphase product families. By reducing the number of external parts, this integration is optimized for a cost and space saving power management solution.

Outstanding features of this controller IC include programmable VID codes compatible with Intel VRM9, VRM10, as well as AMD Hammer microprocessors. A unity gain, differential amplifier is provided for remote voltage sensing, compensating for any potential difference between remote and local grounds. The output voltage can also be positively or negatively offset through the use of a single external resistor.

A unique feature of the ISL6566A is the combined use of both DCR and rDS(ON) current sensing. Load line voltage positioning (droop) and overcurrent protection are accomplished through continuous inductor DCR current sensing, while rDS(ON) current sensing is used for accurate channel-current balance. Using both methods of current sampling utilizes the best advantages of each technique.

Protection features of this controller IC include a set of sophisticated overvoltage, undervoltage, and overcurrent protection. Overvoltage results in the converter turning the lower MOSFETs ON to clamp the rising output voltage and protect the microprocessor. The overcurrent protection level is set through a single external resistor. Furthermore, the ISL6566A includes protection against an open circuit on the remote sensing inputs. Combined, these features provide advanced protection for the microprocessor and power system.

 
  Key Features
 
  • Integrated Multi-Phase Power Conversion
    • 1 or 2-Phase Operation with Internal Drivers
    • 3-Phase Operation with External PWM Driver Signal
  • Precision Core Voltage Regulation
    • Differential Remote Voltage Sensing
    • ±0.5% System Accuracy Over Temperature
    • Adjustable Reference-Voltage Offset
  • Precision Channel Current Sharing
    • Uses Loss-Less rDS(ON) Current Sampling
  • Accurate Load Line Programming
    • Uses Loss-Less Inductor DCR Current Sampling
  • Variable Gate Drive Bias: 5V to 12V
  • Microprocessor Voltage Identification Inputs
    • Up to a 6-Bit DAC
    • Selectable between Intel's VRM9, VRM10, or AMD Hammer DAC codes
    • Dynamic VID-on-the-fly Technology
  • Multi-tiered Overvoltage and Overcurrent Protection
  • Digital Soft-Start
  • Selectable Operation Frequency up to 1.5MHz Per Phase
  • Pb-Free Plus Anneal Available (RoHS Compliant)
Related Documentation
 
Datasheet(s)   Datasheet(s):
 
i-Sim   i-Sim:
 
 
  Parametric Data
VIN (min) (V)3
VIN (max) (V)12
VOUT (min) (V).8375
VOUT (max) (V)1.6
IOUT (max) (A)>100 (3rd FET Driver External)
VBIAS (V)5
ApplicationsVR9, VR10, AMD Hammer
 
  Application Block Diagrams
 
 
  Related DevicesParametric Table   Parametric Table
 
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 ISL6565A Multiphase PWM Controller with Precision rDS(ON) or DCR Current Sensing for VR10.X Application 
 ISL6565B Multiphase PWM Controller with Precision rDS(ON) or DCR Current Sensing for VR10.X Application 
 ISL6566 Three-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications 
 ISL6568 Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications 
 ISL6569 2 Phase Multiphase Buck PWM Controller 
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