Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3819
Edited by the Electronicstalk Editorial
Team on 16 February 2006
Power controller looks for a place in
the Sun
The LTC3819 is a PolyPhase synchronous step-down controller with integrated MOSFET drivers and an onboard 5bit digital interface designed to power Sun Microsystems' new generation of processors.
Linear Technology has introduced the LTC3819, a PolyPhase synchronous step-down controller with integrated MOSFET drivers and an onboard 5bit digital interface designed to power Sun Microsystems' new generation of processors The LTC3819 offers a 45A single-chip solution, integrating four MOSFET drivers with substantial gate drive capability
This article was originally published on Electronicstalk on 3 Oct 2008 at 8.00am (UK)
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PolyPhase operation minimises the requirement for input and output capacitors.
The LTC3819 has two power sections that accurately balance the output power between the power components.
This precision current sharing reduces thermal stress, increasing the reliability of MOSFETs, inductors and capacitors.
Furthermore, it facilitates thermal management, eliminating hot spots and the need for heatsinks.
A design using the LTC3819 is compact, cost-effective and highly efficient, ensuring higher system reliability than competing solutions.
The IC is housed in a 36-lead SSOP package.
The LTC3819's 5bit VID code corresponds to the core voltage range of Sun's new processors.
Core voltage range is from 1.025 to 1.4125V in 12.5mV steps and core current can range from 15 to 40A.
The LTC3819 can deliver this power at up to 90% efficiency from an input voltage source ranging from 4.5 to 36V.
The IC's accurate current sensing typically provides less than 2% output current error between the two channels.
The LTC3819 includes protection functions such as current foldback, short-circuit shutdown and an overvoltage soft latch.
The LTC3819 is guaranteed for operation from -40 to +85C temperature range.
Pricing for the 1000-piece quantity starts at $4.35 each.
Linear Technology also offers the LTC1706-63, a 5bit VID programmer IC that adjusts the output of any 0.6V referenced regulator to meet the 1.025 to 1.4125V range required by the new Sun processors.
The LTC1706-63 is housed in a 10-pin MSOP and is priced at $1.95 each for 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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