NCP5393A Datasheet, PDF (1/24 Pages) ON Semiconductor – 2/3/4-Phase Controller for CPU Applications

NCP5393A
Product Preview
2/3/4-Phase Controller for
CPU Applications
The NCP5393A is a multiphase synchronous buck regulator
controller designed to power the Core and Northbridge of an AMD
microprocessor. The controller has a user configurable two, three, or
four phase regulator for the Core and an independent single phase
regulator to power the microprocessor Northbridge. The NCP5393A
incorporates differential voltage sensing, differential phase current
sensing, optional load−line voltage positioning, and programmable
V_DD and V_DDNB offsets to provide accurately regulated power
parallel− and serial−VID AMD processors. Dual−edge multiphase
modulation provides the fastest initial response to dynamic load
events. This reduces system cost by requiring less bulk and ceramic
output capacitance to meet transient regulation specifications.
High performance operational error amplifiers are provided to
simplify compensation of the V_DD and V_DDNB regulators. Dynamic
Reference Injection further simplifies loop compensation by
eliminating the need to compromise between response to load
transients and response to VID code changes.
Features
• Meets AMD’s Hybrid VR Specifications
• Up to Four V_DD Phases
• Single−Phase V_DDNB Controller
• Dual−Edge PWM for Fastest Initial Response to Transient Loading
• High Performance Operational Error Amplifiers
• Internal Soft Start and Slew Rate Limiting
• Dynamic Reference Injection (Patent #US07057381)
• DAC Range from 12.5 mV to 1.55 V
• $0.5% DAC Accuracy fro 0.8 V to 1.55 V
• V_DD and V_DD Offset Ranges 0 mV − 800 mV
• True Differential Remote Voltage Sense Amplifiers
• Phase−to−Phase I_DD Current Balancing
• Differential Current Sense Amplifiers for Each Phase of Each Output
• “Lossless” Inductor Current Sensing for V_DD and V_DDNB Outputs
• Supports Load Lines (Droop) for V_DD and V_DDNB Outputs
• Oscillator Range of 100 kHz − 1 MHz
• Tracking Over Voltage Protection
• Output Inductor DCR−Based Over Current Protection for V_DD and
V_DDNB Outputs
• Guaranteed Startup into Precharged Loads
• Temperature Range: 0°C to 70°C
• This is a Pb−Free Device
Applications
• Desktop Processors
• Server Processors
• High−End Notebook PCs
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
MARKING
DIAGRAM
1
1 48
QFN48, 7x7
CASE 485AJ
NCP5393A
AWLYYWWG
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G
= Pb−Free Package
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5393AMNR2G 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
August, 2008 − Rev. P0
Publication Order Number:
NCP5393A/D