Dual Multi-Topology DC/DC Converters with 50V, 2A Internal Switches

News Release  www.linear.com
Dual Multi-Topology DC/DC Converters with
50V, 2A Internal Switches
MILPITAS, CA – April 10, 2014 – Linear Technology Corporation announces the LT8471, a
dual DC/DC converter that utilizes two internal 2A, 50V switches and an additional 500mA
switch to facilitate step-down, step-up, and inverting conversions. Each 2A channel can be
independently configured as a buck, boost, SEPIC, flyback, ZETA or inverting DC/DC converter.
This broad range of topologies and output configurations makes it ideal for a wide range of
industrial and automotive applications. The LT8471 operates from an input voltage range of 2.6V
to 50V, making it suitable for applications with input sources ranging from a single-cell Li-Ion to
automotive batteries.
The LT8471’s 50V internal switches can accommodate applications with inputs and
outputs as high as 45V. The device is capable of generating both positive and negative outputs
from a single converter, making it ideal for a wide array of biasing applications. A small
integrated 500mA boost converter facilitates both buck and single inductor inverting applications
at optimal efficiencies. The LT8471’s switching frequency is programmable and synchronizable
from 100kHz to 2MHz, which keeps externals very small. The combination of a TSSOP package
and tiny externals ensures a very compact footprint while minimizing solution cost.
The LT8471’s high efficiency 50V switches deliver overall efficiencies up to 85% for
buck and inverting applications. From a 6V to 32V input, the LT8471 delivers up to 1.5A at 5V
and 650mA at -5V. A power good pin on each channel is offered for ease of use when eventbased sequencing is required. The LT8471’s switching frequency can be programmed via a single
Dual Multi-Topology DC/DC Converters with
50V, 2A Internal Switches
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resistor or synchronized to an external clock between 100kHz and 2MHz, minimizing external
component size and avoiding “noise critical” frequency bands. Anti-phase switching minimizes
input ripple. Undervoltage and overvoltage lockout (UVLO/OVLO) is user adjustable for
optimal system performance. Other features include external synchronization capability, softstart and frequency foldback.
The LT8471EFE is available in a 20-lead, thermally enhanced TSSOP package, priced at
$3.75 each for 1,000 piece quantities. An industrial temperature (-40°C to 125°C) version, the
LT8471IFE, is priced at $4.13 each for 1,000 piece quantities. Both versions are available from
stock. For more information, visit www.linear.com/product/LT8471
Photo Caption: Dual 50V, 2A Multi-Topology DC/DC Converters with Internal Switches &
Synchronization
Summary of Features: LT8471
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Dual 2A & One 500mA, 50V Internal Power Switch Channels
2A Primary Channels Can Be Buck, Boost, SEPIC, ZETA, Flyback or Inverting DC/DC Converter
500mA Skyhook Channel Efficiently Generates Boosted Input Voltage
Wide Input Voltage Range of 2.6V to 50V
UVLO & OVLO Programmable on OV/UV Pin
Soft-Start Programmable for Each Channel
Fixed Frequency PWM (Set by RT Pin or Synchronized to External Clock)
Anti-Phase Switching Reduces Input Ripple
20-Lead TSSOP Package
Dual Multi-Topology DC/DC Converters with
50V, 2A Internal Switches
page 3
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 and µModule are registered trademarks of Linear
Technology Corp. All other trademarks are the property of their respective owners.
Press Contacts:
North America / Worldwide
UK & Nordic
John Hamburger, Director Marketing
Communications
[email protected]
Tel: 408-432-1900 ext 2419
Alan Timmins
[email protected]
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
[email protected]
Tel: 408-432-1900 ext 2233
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