60V Synchronous Boost Controller

News Release  www.linear.com
60V Synchronous Boost Controller
Reduces Thermal Stress with up to 98% Efficiency
MILPITAS, CA – July 23, 2014 – Linear Technology Corporation announces the LTC3769, a
synchronous step-up DC/DC controller that replaces the boost diode with a high efficiency
N-channel MOSFET, increasing efficiency and maximizing output current capability. This
controller produces 24V at up to 5A output from a 12V input with up to 98% efficiency, making
it ideal for automotive, industrial and medical applications where a step-up DC/DC converter
must have low heat dissipation in a small solution size.
The LTC3769 operates over an input voltage range of 4.5V to 60V during start-up,
maintains operation down to 2.3VIN after start-up and can regulate an output as high as 60V. The
low 28µA quiescent current extends the run time in battery-powered applications when in
standby mode with the output voltage in regulation. 1.2 Ohm onboard N-channel MOSFET gate
drivers are capable of slewing large MOSFET gates quickly, minimizing transition losses and
enabling up to 10A output current.
The LTC3769 has adjustable cycle-by-cycle current limit protection and uses either a
sense resistor or monitors the voltage drop across the inductor (DCR) for current sensing. In
applications where the input voltage may exceed the regulated output voltage, the LTC3769
keeps the synchronous MOSFET on continuously so that the output voltage follows the input
voltage with minimal power loss. The LTC3769’s current-mode architecture enables a selectable
frequency from 50kHz to 900kHz or it can be synchronized to an external clock from 75kHz to
850kHz. Furthermore, this device has adjustable soft-start, a power good output signal and
maintains ±1% reference voltage accuracy over a –40°C to 125°C operating temperature range.
The LTC3769 is available in 20-lead TSSOP and 24-pin 4mm x 4mm QFN packages.
Four temperature grades are available, with operation from –40 to 125°C for the extended and
industrial grades, a high temp automotive range of –40°C to 150°C and a military grade of –55°C
to 150°C. The 1,000-piece price starts at $2.75 each. For more information, visit
60V Synchronous Boost Controller
Reduces Thermal Stress with up to 98% Efficiency
page 2
Photo Caption: 60V Synchronous Step-Up DC/DC Controller
Summary of Features: LTC3769
Up to 98% Efficiency
Up to 60V VOUT Operation
Wide VIN Ranging from 4.5V to 60V, Maintains Operation down to 2.3V After Start-Up
Low 28µA Quiescent Current Extends the Run Time in Battery-Powered Applications
4µA Shutdown Current
Powerful 1.2 Ohm Gate Drivers
100% Duty Cycle Capability for Synchronous MOSFET
Phase Lockable Frequency from 75kHz to 850kHz
Programmable Fixed Frequency from 50kHz to 900kHz
RSENSE or Inductor DCR Current Sensing
Current-Mode Control
±1% Reference Voltage Accuracy over –40oC to +125oC
Programmable Soft-Start
Power Good Output
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
Tel: 408-432-1900 ext 2419
Alan Timmins
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
Tel: 408-432-1900 ext 2233