NCP5395 Datasheet, PDF (1/29 Pages) ON Semiconductor – CPU Applications

NCP5395
Product Preview
2/3/4-Phase Controller with
On Board Gate Drivers for
CPU Applications
The NCP5395 provides up to a four−phase buck solution which
combines differential voltage sensing, differential phase current
sensing, adaptive voltage positioning, and on board gate drivers.
Dual−edge pulse−width modulation (PWM) combined with inductor
current sensing reduces system cost by providing the fastest initial
response to dynamic load events. Dual−edge multiphase modulation
reduces the total bulk and ceramic output capacitance required to meet
transient regulation specifications.
The on board gate drivers includes adaptive non overlap and power
saving operation. 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 V_ID performance.
Features
• Meets Intel’s VR11.1 Specifications
• Meets AMD 6 Bit Code Specifications
• Dual−edge PWM for Fastest Initial Response to Transient Loading
• High Performance Operational Error Amplifier
• Internal Soft Start
• Dynamic Reference Injection (Patent #US07057381)
• DAC Range from 0.5 V to 1.6 V
• DAC Feed Forward Function (Patient 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
• Differential Current Sense Amplifiers for Each Phase
• Adaptive Voltage Positioning (AVP)
• Oscillator Frequency Range of 125 kHz − 1 MHz
• Latched Over Voltage Protection (OVP)
• Guaranteed Startup into Pre−Charged Loads
• Threshold Sensitive Enable Pin for VTT Sensing
• Power Good Output with Internal Delays
• Thermally Compensated Current Monitoring
• Thermal Shutdown Protection
• Adaptive−Non−Overlap Gate Drive Circuit
• Output Disable Control Turn Off of Both Phase Pair MOSFETs
• This is a Pb−Free Device
Applications
• Desktop Processors
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
http://onsemi.com
1 48
QFN48
CASE 485K
PLASTIC
MARKING DIAGRAM
48
1
NCP5395
AWLYYWWG
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
G
= Pb−Free Package
48
1
BG3
PSI
VID0
VID1
VID2
VID3
VID4
VID5
VID6
VID7/AMD
ROSC
ILIM
AGND
Down−bonded to
Exposed Flag
BG1
G4
VRRDY
EN
CS1N
CS1P
CS2N
CS2P
CS3N
CS3P
CS4N
CS4P
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5395MNR2G QFN48 2500/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2008
1
July, 2008 − Rev. P5
Publication Order Number:
NCP5395/D