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FAN5019

Fairchild Semiconductor
Part Number FAN5019
Manufacturer Fairchild Semiconductor
Description 6-Bit VID Controller 2-4 Phase VRM10.X Controller
Published Mar 30, 2005
Detailed Description www.fairchildsemi.com FAN5019 6-Bit VID Controller 2-4 Phase VRM10.X Controller Features • Pin and Function Backward Co...
Datasheet PDF File FAN5019 PDF File

FAN5019
FAN5019

Overview
www.
fairchildsemi.
com FAN5019 6-Bit VID Controller 2-4 Phase VRM10.
X Controller Features • Pin and Function Backward Compatible with FAN53168 and FAN53180 Controllers • Precision Multi-Phase DC-DC Core Voltage Regulation – ±10mV Output Voltage Accuracy Over Temperature • Differential Remote Voltage Sensing • Selectable 2, 3, or 4 Phase Operation • Selectable VRM9 or VRM10 Operation • Up to 1MHz per Phase Operation (4MHz ripple Frequency) • Lossless Inductor Current Sensing for Loadline Compensation – External Temperature Compensation • Accurate Load-Line Programming (Meets Intel® VRM/VRD10.
0 and 10.
X CPU Specifications) • Accurate Channel-Current Balancing for Thermal Optimization and Layout Compensation • Convenient 12V Supply Biasing • 6-bit Voltage Identification (VID) Input – .
8375V to 1.
600V in 12.
5mV Steps – Dynamic VID Capability with Fault-Blanking for glitch-less Output voltage Changes • Adjustable Over Current Protection with Programmable Latch-Off Delay.
Latch-Off Function may be Disabled • Over-Voltage Protection – Internal OVP Crowbar Protection General Description The FAN5019 is a multi-phase DC-DC controller for implementing high-current, low-voltage, CPU core power regulation circuits.
It is part of a chipset that includes external MOSFET drivers and power MOSFETS.
The FAN5019 drives up to four synchronous-rectified buck channels in parallel.
The multi-phase buck converter architecture uses interleaved switching to multiply ripple frequency by the number of phases and reduce input and output ripple currents.
Lower ripple results in fewer components, lower component cost, reduced power dissipation, and smaller board area.
The FAN5019 features a high bandwidth control loop to provide optimal response to load transients.
The FAN5019 senses current using lossless techniques: Phase current is measured through each of the output inductors.
This current information is summed, averaged and used to set the loadline of the output via programmable "droop".
The d...


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