Enpirion Power Datasheet EC7401QI 4-Phase PWM Controller with 8-Bit DAC Code DS-1045 Datasheet The Altera Enpirion EC7401QI controls microprocessor Features core voltage regulation by driving up to 4 synchronous-rectified Precision Multiphase Core Voltage Regulation buck channels in parallel. The EC7401QI can precision R (ON) or DCR Differential Current Sensing. Multiphase - Differential Remote Voltage Sensing DS buck converter architecture uses interleaved timing to multiply - 0.5% System Accuracy Over Life, Load, Line and channel ripple frequency and reduce input and output ripple Temperature currents. Lower ripple results in fewer components, lower - Adjustable Precision Reference-Voltage Offset component cost, reduced power dissipation, and smaller (ON) or DCR Current Sensing Precision R DS implementation area. - Accurate Load-Line Programming Microprocessor loads can generate load transients with - Accurate Channel-Current Balancing extremely fast edge rates. The EC7401QI features a high - Differential Current Sense bandwidth control loop and ripple frequencies up to >4MHz to provide optimal response to the transients. Microprocessor Voltage Identification Input Todays microprocessors require a tightly regulated output - VID Voltage Scaling Technology voltage position versus load current (droop). The EC7401QI - 8-Bit VID Input with Selectable VR11 Code and senses current by utilizing patented techniques to measure the Extended VR10 Code at 6.25mV per Bit voltage across the on resistance, R (ON), of the lower DS - 0.5V to 1.6V Operation Range MOSFETs or DCR of the output inductor during the lower Thermal Sensing MOSFET conduction intervals. Current sensing provides the needed signals for precision droop, channel-current balancing, Integrated Programmable Temperature Compensation and overcurrent protection. A programmable internal Threshold-Sensitive Enable Function for Power Sequencing temperature compensation function is implemented to and VTT Enable effectively compensate for the temperature coefficient of the Overcurrent Protection current sense element. Overvoltage Protection A unity gain, differential amplifier is provided for remote voltage sensing. Any potential difference between remote and 2-, 3- or 4-Phase Operation local grounds can be completely eliminated using the remote- Adjustable Switching Frequency Up to 1MHz Per Phase sense amplifier. Eliminating ground differences improves Package Option regulation and protection accuracy. The threshold-sensitive - QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad enable input is available to accurately coordinate the start up of Flat No Leads - Product Outline the EC7401QI with any other voltage rail. VID Voltage Scaling technology allows seamless on-the-fly VID changes. The offset - QFN Near Chip Scale Package Footprint Improves PCB Efficiency, Thinner in Profile pin allows accurate voltage offset settings that are independent of VID setting. Pb-Free (RoHS Compliant) 2014 Altera Corporation. All rights reserved. ALTERA, ARRIA, CYCLONE, ENPIRION, HARDCOPY, MAX, MEGACORE, NIOS, QUARTUS and STRATIX words and logos are trademarks of Altera Corporation and registered in the U.S. Patent and Trademark Office and in other countries. All other words and logos identified as trademarks or service marks are the property of their respective holders as described at ISO www.altera.com/common/legal.html. Altera warrants performance of its semiconductor products to current specifications in accordance with 9001:2008 Altera s standard warranty, but reserves the right to make changes to any products and services at any time without notice. Altera assumes no 101 Innovation Drive Registered responsibility or liability arising out of the application or use of any information, product, or service described herein except as expressly agreed San Jose, CA 95134 to in writing by Altera. Altera customers are advised to obtain the latest version of device specifications before relying on any published information and before placing orders for products or services. www.altera.com March 2014 Altera Corporation Subscribe 09614 March 14, 2014 Rev APage 2 Ordering Information PART NUMBER PART PACKAGE PKG. (Note) MARKING TEMP. (C) (Pb-Free) DWG. EC7401QI EC7401 -40 to +85 40 Ld 6x6 QFN L40.6x6 *Add -T suffix for tape and reel. NOTE: These Altera Enpirion Pb-free plastic packaged products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Altera Enpirion Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. EC7401QI 4-Phase PWM Controller with 8-bit DAC Code March 2014 Altera Corporation 09614 March 14, 2014 Rev A