80V DC/DC Converter Makes Positive or Negative Regulated Voltages

News Release ⎜ www.linear.com
80V DC/DC Converter Makes Positive or Negative Regulated Voltages
MILPITAS, CA – June 9, 2010 – Linear Technology Corporation announces the LT3958, a high
input voltage DC/DC converter for boost, flyback, SEPIC and inverting power supply
applications. This device operates over an input voltage range from 5V to 80V, has an onboard
84V/3.5A power switch, and can achieve efficiencies up to 96%, making it well suited for
industrial, automotive, medical and telecom applications.
The LT3958 is capable of generating either a positive or negative regulated output
voltage with its two voltage feedback error amplifiers and reference voltages. One set is for
positive output voltages, the other is for negative output voltages, both off a single feedback pin,
making the LT3958 highly versatile. With a programmable fixed or synchronizable operating
frequency from 100k Hz to 1MHz, designers can choose a wide range of inductors and
capacitors to optimize size, performance and cost. Its current-mode control results in stable
operation over a wide range of supply and output voltages. The device supports designs using
only ceramic capacitors, enabling a smaller solution size. Additional features include
programmable soft-start, adjustable input undervoltage lockout, along with output overvoltage
and overcurrent protection.
The LT3958 operates from a -40°C to 125°C temperature range and is offered in a
5mm x 6mm QFN-36 package with additional pin spacing to support high voltage operation.
The1000-piece price starts at $3.05 each. For more information, visit
80V DC/DC Converter Makes Positive or Negative Regulated Voltages
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Photo Caption: 80V Boost, Flyback, SEPIC & Inverting DC/DC Converter
Summary of Features: LT3958
For Boost, Flyback, SEPIC & Inverting Applications
Wide Input Operating Voltage: 5V to 80V
On-Board 84V/3.5A Power Switch
Positive or Negative Output Voltage Setting with a Single Feedback Pin
Selectable Fixed 100kHz to 1MHz Operating Frequency
Synchronizable to an External Clock
Programmable Soft Start
True Current Mode Control
Additional Pin to Pin IC Spacing
Output Overvoltage & Overcurrent Protection
Programmable Input Undervoltage Lockout with Hysteresis
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits,
was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major
public companies in 2000. Linear Technology products include high performance amplifiers,
comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery
chargers, data converters, communications interface circuits, RF signal conditioning circuits,
uModule® products, and many other analog functions. Applications for Linear Technology’s
high performance circuits include telecommunications, cellular telephones, networking products
such as optical switches, notebook and desktop computers, computer peripherals,
video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer
products such as digital cameras and MP3 players, complex medical devices, automotive
electronics, factory automation, process control, and military and space systems.
LT, LTC, LTM, uModule and
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
[email protected]
Tel 408-432-1900 ext 2419
Alan Timmins
[email protected]
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
[email protected]
408-432-1900 ext 2233