2A, 70V SEPIC/Boost DC/DC Converter with 7µA Quiescent Current

News Release  www.linear.com
2A, 70V SEPIC/Boost DC/DC Converter with 7µA Quiescent Current
MILPITAS, CA – July 16, 2015 – Linear Technology Corporation announces the LT8494, a
current mode, fixed frequency SEPIC/boost DC/DC converter with an internal 2A, 70V switch.
Ultralow quiescent current of only 7µA makes the device ideal for always-on automotive or
other industrial battery powered systems. The LT8494 starts up from an input voltage range of
2.5V to 32V and once running it operates from inputs from 1V to 60V, making it suitable for
applications with input sources ranging from a single-cell Li-Ion to automotive inputs. The
LT8494 can be configured as a boost, SEPIC or flyback converter. Its switching frequency can be
programmed via a single resistor between 250kHz and 1.5MHz, enabling designers to minimize
external component sizes. The combination of a thermally enhanced TSSOP-20E or 4mm x 4mm
QFN package and tiny externals ensures a very compact footprint while minimizing solution
The LT8494’s internal, high efficiency 2A/70V switch delivers efficiencies of up to 83%
while operating in a SEPIC configuration. A unique design using dual supply pins (VIN and
BIAS) enables the device to operate from the most efficient supply, optimizing efficiency over a
wide range of conditions. The LT8494 can operate with input supply voltages up to 60V for
SEPIC topology and up to 32V, with ride through protection in boost and flyback topologies.
Other features include a FMEA tolerant package (TSSOP-20E), power good indicator,
programmable soft-start and thermal shutdown protection.
The LT8494 is available in a thermally enhanced TSSOP-20 package. Pricing starts at
$2.85 each for 1,000 piece quantities. Industrial temperature (–40°C to 125°C) and high
temperature (–40°C to 150°C) grades are also available. All versions are available from stock.
For more information, visit www.linear.com/product/LT8494.
2A, 70V SEPIC/Boost DC/DC Converter with 7µA Quiescent Current
page 2
Photo Caption: SEPIC/Boost DC/DC Converter
Summary of Features: LT8494
Wide Input Voltage Range of ~1V to 60V (2.5V to 32V for Start-Up)
Low Ripple Burst Mode® Operation
o 7µA IQ at 12VIN to 5.0VOUT
o Output Ripple (<10mV Typ.)
Dual Supply Pins:
o Improves Efficiency
o Reduces Minimum Supply Voltage to ~1V after Start-Up to Extend Battery Life
Integrated 2A/70V Power Switch
Power Good Functional for Input Supply Down to 1.3V
FMEA Fault Tolerant in TSSOP Package
Fixed Frequency PWM, SEPIC/Boost/Flyback Topologies
Programmable Switching Frequency: 250kHz to 1.5MHz
UVLO Programmable on SWEN Pin
Soft-Start Programmable with One Capacitor
20-Lead TSSOP and 4mm x 4mm QFN Packages
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, Burst Mode 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
[email protected]
Tel: 408-432-1900 ext 2419
Alan Timmins
[email protected]
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
[email protected]
Isolated 8-Port PoE PSE Controllers Eliminate Optos for
Lowest Solution Cost
Tel: 408-432-1900 ext 2233
page 3