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

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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 always­on 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 single­cell Li­Ion 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 TSSOP­20E or 4mm x 4mm QFN package and tiny externals ensures a very compact footprint while minimizing solution cost.
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 (TSSOP­20E), power good indicator, programmable soft­start and thermal shutdown protection.
The LT8494 is available in a thermally enhanced TSSOP­20 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.

Wide Input Voltage Range of ∼1V to

60V (2.5V to 32V for Start­Up)

Low Ripple Burst Mode® Operation

7µA IQ at 12VIN to 5.0VOUT

Output Ripple (

Dual Supply Pins:

Improves Efficiency Reduces Minimum Supply Voltage to ∼1V after Start­Up 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 Soft­Start Programmable with One Capacitor

20­Lead 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.

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.

John Hamburger
Tel: (408) 432­1900 ext. 2419 jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233 ddickinson@linear.com

Fanny Lau
Tel: 852­2428­0303 flau@linear.com
Angela Ao
Tel: (8610)6522 8081 angela.ao@ebacomms.com

Yoshikazu Funasaki Tel: 81­3­5226­7291 yfunasaki@linear.com
Takashi Matsuda
Tel: +81­3­3255­8411 linear@chugai­ad.co.jp

Desiree Park
Tel: +82­2­565­6625 desiree@ezwire.com

Alice Wang
Tel: +886­2­28974705 alice@ezwire.com

Ralf Stegmann
Tel: +49 (0) 71319234­11 ralf@ezwire.com

Alan Timmins
Tel: +44­1252­629937 alan@ezwire.com

Simona Labianca
Tel: +39 340 0571697 simona@ezwire.com

Clotilde Zeller
Tel: +33 1 4614 87 09 clotilde@ezwire.com

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