100V Flyback Controller Now Offered in Military -55°C to 150°C MP Grade

News Release  www.linear.com
100V Flyback Controller Now Offered in
Military –55°C to 150°C MP Grade
MILPITAS, CA – March 18, 2015 – Linear Technology Corporation announces a new military
MP grade version of the LT3748, a high input voltage isolated flyback DC/DC controller. This
device simplifies the design of an isolated DC/DC converter by not requiring an opto-isolator,
third winding or signal transformer for feedback since the output voltage is sensed from the
primary-side flyback signal. The LT3748 operates over a 5V to 100V input voltage range and
drives an external N-channel power MOSFET, making it well suited for a wide variety of
automotive, industrial, telecom and datacom applications.
The LT3748 operates in boundary mode, which is a variable frequency current mode
control switching scheme, resulting in +/-5% typical regulation over the full line, load and
temperature range. Boundary mode also permits the use of a smaller transformer compared to
equivalent continuous conduction mode designs. The output voltage is easily set by two external
resistors and the transformer turns ratio. Several off-the-shelf transformers are identified in the
data sheet that can be used for numerous applications. The high level of integration and the use
of boundary mode operation results in a simple, clean application solution to the traditionally
tough problem of isolated power delivery.
Additional features include an onboard low drop regulator for IC power, programmable
soft start, undervoltage lockout, adjustable current limit and output voltage temperature
The LT3748MP operating junction temperature is from -55°C to 150°C and the device is
housed in a MSOP-16 package with 4 pins removed for additional high voltage pin spacing. The
1,000 piece price starts at $9.25 each. For more information, visit
100V Flyback Controller Now Offered in
Military –55°C to 150°C MP Grade
page 2
Photo Caption: 100V Isolated Flyback Operates Over -55°C to 150°C
Summary of Features: LT3748MP
–55°C to 150°C Junction Temperature Operation
VIN Range from 5V to 100V
No Opto-Isolator, Transformer or Third Winding Required for Feedback
Drives External N-channel Power MOSFET
Current Mode Control
Boundary Mode Operation
VOUT Set with Two External Resistors
Off-the-Shelf Transformers
Programmable Soft-Start
Programmable Under Voltage Lockout
Output Voltage Temperature Compensation
The 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 and µModule are registered trademarks of Linear
Technology Corp. All other trademarks are the property of their respective owners.
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John Hamburger, Director Marketing
[email protected]
Tel: 408-432-1900 ext 2419
Alan Timmins
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Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
[email protected]
Tel: 408-432-1900 ext 2233