NCP5392T Datasheet, PDF (1/30 Pages) ON Semiconductor – 2/3/4-Phase Controller with Light Load Power Saving Enhancement for CPU Applications

NCP5392T
2/3/4-Phase Controller with
Light Load Power Saving
Enhancement for CPU
Applications
The NCP5392T provides up to a four−phase buck solution which
combines differential voltage sensing, differential phase current
sensing, and adaptive voltage positioning to provide accurately
regulated power for Intel processors. It also receives power saving
command (PSI) from CPU, and operates in a single phase emulation
diode mode to obtain a high efficiency at light load. Dual−edge
pulse−width modulation (PWM) combined with precise inductor
current sensing provides the fastest initial response to dynamic load
events both in power saving and normal modes. Dual−edge
multiphase modulation reduces the total bulk and ceramic output
capacitance required therefore reducing the system cost to meet
transient regulation specifications.
A high performance operational error amplifier is provided to
simplify compensation of the system. Dynamic Reference Injection
further simplifies loop compensation by eliminating the need to
compromise between closed−loop transient response and Dynamic
VID performance. An enhancement of normal mode and PSI mode
operation has been achieved in NCP5392T both under heavy load
and light load condition or the load changing.
http://onsemi.com
MARKING
DIAGRAM
1 40
40 PIN QFN, 6x6
MN SUFFIX
CASE 488AR
1
NCP5392T
AWLYYWWG
NCP5392T = Specific Device Code
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
G
= Pb−Free Package
*Pin 41 is the thermal pad on the bottom of the device.
ORDERING INFORMATION
Features
• Meets Intel’s VR11.1 Specifications
• Enhanced Power Saving Operation (PSI)
• Dual−edge PWM for Fastest Initial Response to Transient Loading
• High Performance Operational Error Amplifier
Device
Package
Shipping^†
NCP5392TMNR2G* QFN−40 2500/Tape & Reel
(Pb−Free)
*Temperature Range: 0°C to 85°C
†For information on tape and reel specifications,
• Internal Soft Start
• Dynamic Reference Injection^® (Patent #US07057381)
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
• DAC Range from 0.375 V to 1.6 V
• DAC Feed Forward Function (Patent Pending)
• ±0.5% DAC Voltage Accuracy from 1.0 V to 1.6 V
• True Differential Remote Voltage Sensing Amplifier
• Phase−to−Phase Current Balancing
• “Lossless” Differential Inductor Current Sensing
• Threshold Sensitive Enable Pin for VTT Sensing
• Accurate Current Monitoring (IMON)
• Power Good Output with Internal Delays
• Differential Current Sense Amplifiers for each Phase
• Thermally Compensated Current Monitoring
• Adaptive Voltage Positioning (AVP)
• This is a Pb−Free Device
• Oscillator Frequency Range of 100 kHz – 1 MHz
• Latched Over Voltage Protection (OVP)
• Guaranteed Startup into Pre−Charged Loads
Applications
• Desktop Processors
© Semiconductor Components Industries, LLC, 2009
1
June, 2009 − Rev. 0
Publication Order Number:
NCP5392T/D