100V Input DC/DC Controller Generates Positive or Negative Regulated Output

News Release ⎜ www.linear.com
100V Input DC/DC Controller Generates Positive or
Negative Regulated Output
MILPITAS, CA – August 4, 2009 – Linear Technology Corporation announces the LT3758, a
high input voltage DC/DC controller for boost, flyback, SEPIC and inverting power supply
applications, capable of generating either positive or negative regulated output voltages. The
LT3758 has 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 LT3758 a highly versatile DC/DC controller for many types of power supply designs.
The LT3758 operates from a wide input voltage range from 5.5V to 100V, which is ideal
for surviving high input voltage transients. This device can achieve efficiencies up to 96% and is
well suited for harsh industrial, automotive, medical and telecom applications. With a
programmable fixed or synchronizable operating frequency from 100kHz to 1MHz, designers
can choose a wide range of inductors and capacitors to optimize size, performance and cost. The
fixed frequency, current-mode control results in stable operation over a wide range of supply and
output voltages, along with all ceramic capacitor designs, enabling a smaller solution size.
The LT3758 drives an external N-channel MOSFET from an internally regulated 7.2V
supply. Programmable soft-start enables control of the output voltage turn-on time. In addition,
the LT3758 features a programmable input undervoltage lockout with hysteresis, along with
output overvoltage and overcurrent protection.
The LT3758 is offered in thermally enhanced MSOP-10 and 3mm x 3mm DFN-10
packages, both with extended and industrial temperature ranges from -40°C to 125°C. The
1000-piece price starts at $2.35 each. For more information, visit www.linear.com.
100V Input DC/DC Controller Generates Positive or
Negative Regulated Output
page 2
Photo Caption: High Voltage Boost, Flyback, SEPIC & Inverting Controller
Summary of Features: LT3758
For Boost, Flyback, SEPIC & Inverting Applications
Wide Input Operating Voltage: 5.5V to 100V
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
Integrated Low-Side Driver
True Current Mode Control
Internal 7.2V Low Dropout Voltage Regulator
Low Shutdown Current < 1uA
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