LINEAR TECHNOLOGY CORPORATION
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MILPITAS, CA January 8, 2015 Linear Technology Corporation announces the LTC3371, a highly integrated generalpurpose power management solution for systems requiring multiple low voltage power supplies. The device features four synchronous buck converters, each powered from independent 2.25V to 5.5V inputs, and each configurable to share up to four of eight available 1A power stages. With eight unique output current configurations, the LTC3371 provides substantial flexibility and ease of reuse across many different applications. The device is ideal for a wide variety of multichannel industrial, automotive, communications and distributed power systems.
The LTC3371's buck power stages can be connected in parallel by simply combining their respective VIN and SW
pins and programming the desired configuration on the C1C3 pins. Up to four adjacent power stages can be
combined on a single channel, resulting in eight unique output configurations ranging from a quad 2A buck to a dual
4A buck. A single inductor may be used for each buck regulator, and any unused power stages may be added to one of the high power channels for improved overall efficiency.
The LTC3371's precision enable pin thresholds, independent poweron reset outputs, watchdog timer and die temperature monitor, provide flexible and reliable powerup sequencing and system monitoring. All of the switching regulators are internally compensated and need only external feedback resistors to set the output voltages. The common buck switching frequency can be programmed with an external resistor, synchronized to an external oscillator or set to a default internal 2MHz clock. The switching regulators may be programmed to operate either in Burst Mode® operation for high efficiency at light loads or in forced continuous PWM mode for lowest noise at light loads. The bucks are phased in 90° steps to reduce noise and input ripple, have forward and reverse current limiting, softstart to limit inrush current during startup, and shortcircuit protection.
The LTC3371 is available from stock in thermally enhanced 38pin packages: a low profile 5mm x 7mm QFN and TSSOP. E and Igrades are specified over an operating junction temperature range of 40°C to 125°C, and the H grade features operation from 40°C to 150°C. 1000piece pricing starts at $4.15 each for the Egrade. For more information, visit www.linear.com/product/LTC3371.
8 x 1A Buck Power Stages Configurable as 2, 3 or 4 Output Channels
8 Unique Output Configurations (1A to
4A Per Channel)
Independent VIN Supplies for Each
DC/DC (2.25V to 5.5V)
Low No Load Supply Current:
15µA in Shutdown (All Channels
Off)
68µA One Channel Active in
Burst Mode® Operation
18µA Per Additional Channel Precision Enable Pin Thresholds for Autonomous Sequencing
1MHz to 3MHz RT Programmable Frequency (2MHz Default) or PLL Synchronization
Temp Monitor Indicates Die Junction
Temperature
CT Programmed Watchdog Timer Independent /RST Pins Indicate When Each Buck Is in Regulation
38Lead 5mm X 7mm QFN & TSSOP Packages
Configurable 4Channel 8A Buck DC/DCs Click Photo for HighRes ImageThe USA list pricing shown is for budgetary use only. International prices may differ due to local duties, taxes, fees and exchange rates.
About Linear Technology
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for over three decades. The Company's products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and
interface ICs, µModule® subsystems, and wireless sensor network products. For more information, visit
www.linear.com.
, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and µModule are registered trademarks of
Linear Technology Corp. All other trademarks are the property of their respective owners.
John Hamburger
Tel: (408) 4321900 ext. 2419 jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233 ddickinson@linear.com
Fanny Lau
Tel: 85224280303 flau@linear.com
Angela Ao
Tel: (8610)6522 8081 angela.ao@ebacomms.com
Yoshikazu Funasaki Tel: 81352267291 yfunasaki@linear.com
Takashi Matsuda
Tel: +81332558411 linear@chugaiad.co.jp
Desiree Park
Tel: +8225656625 desiree@ezwire.com
Alice Wang
Tel: +886228974705 alice@ezwire.com
Ralf Stegmann
Tel: +49 (0) 7131923411 ralf@ezwire.com
Alan Timmins
Tel: +441252629937 alan@ezwire.com
Simona Labianca
Tel: +39 340 0571697 simona@ezwire.com
Clotilde Zeller
Tel: +33 1 4614 87 09 clotilde@ezwire.com
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