No-Opto 100V Isolated Monolithic Flyback Regulator Operates over a -55°C to 150°C Junction Temperature Range

News Release ⎜
No-Opto 100V Isolated Monolithic Flyback Regulator
Operates over a -55°C to 150°C Junction Temperature Range
MILPITAS, CA – May 3, 2011 – Linear Technology Corporation announces a new high
reliability (MP-grade) version of the LT3511, a high voltage isolated monolithic flyback
regulator that operates over a -55°C to 150°C junction temperature range. This device simplifies
the design of an isolated DC/DC converter since it needs no optocoupler, third winding or signal
transformer for feedback, as the device’s output voltage is sensed from the primary-side flyback
signal. The LT3511 operates over a 4.5V to 100V input voltage range, has a 240mA, 150V
onboard power switch and delivers up to 2.5 watts, making it well suited for a wide variety of
telecom, datacom, automotive, industrial and medical applications.
The LT3511 operates in a boundary mode, a current-mode control switching scheme,
resulting in +/-5% typical regulation over the full line, load and temperature range. Boundary
mode, also known as critical conduction mode (CrCM), 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 transformers identified in the data
sheet can be used for numerous applications. Additional features include an onboard low dropout
regulator for IC power, undervoltage lockout and output voltage temperature compensation. The
high level of integration results in a simple, clean, tightly regulated solution for isolated power
The LT3511MPMS is available in a small MSOP-16 package with 4 pins removed for
additional high voltage pin spacing. Pricing starts at $8.95 each in 1000-piece quantities. For
more information, visit
No-Opto 100V Isolated Monolithic Flyback Regulator
Operates over a -55°C to 150°C Junction Temperature Range
page 2
Photo Caption: 100V Isolated Monolithic Flyback Regulator
Summary of Features: LT3511MP
VIN Range from 4.5V to 100V
Onboard 240mA, 150V Integrated Power Switch
No Optocoupler, Transformer or Third Winding Required for Feedback
Current-Mode Control
Boundary-Mode Operation
VOUT Set with Two External Resistors
Off-the-Shelf Transformers
Programmable Undervoltage Lockout
Output Voltage Temperature Compensation
-55°C to 150°C Junction Temperature
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 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, and µModule® subsystems.
LT, LTC, LTM, µModule 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]
Tel: 408-432-1900 ext 2233