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FAN53168

Fairchild Semiconductor
Part Number FAN53168
Manufacturer Fairchild Semiconductor
Description 6-Bit VID Controlled 2-4 Phase DC-DC Controller
Published Jun 8, 2009
Detailed Description www.fairchildsemi.com FAN53168 6-Bit VID Controlled 2-4 Phase DC-DC Controller www.datasheet4u.com Features • Precisio...
Datasheet PDF File FAN53168 PDF File

FAN53168
FAN53168


Overview
www.
fairchildsemi.
com FAN53168 6-Bit VID Controlled 2-4 Phase DC-DC Controller www.
datasheet4u.
com Features • 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 • 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 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 • Over-Voltage Protection - Internal OVP Crowbar Protection General Description The FAN53168 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 FAN53168 drives up to 4 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 FAN53168 features a high bandwidth control loop to provide optimal response to load transients.
The FAN53168 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 droop is temperature compensated to achieve precise loadline characteristics over the entire operating range.
Additionally, individual phase cu...


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