Linear Technology : 500mA, 1.5MHz, 65V Boost DC/DC Converter

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MILPITAS, CA ­ March 5, 2015 ­ Linear Technology Corporation announces the LT8570 and LT8570­1 current mode, fixed frequency step­up DC/DC converters. The LT8570 uses an internal 500mA, 65V switch, whereas the LT8570­1 uses a 250mA, 65V switch. Both devices operate from an input voltage range of 2.55V to 40V, making them suitable for applications with input sources ranging from a single­cell Li­Ion to automotive inputs. Both the LT8570 and LT8570­1 can be configured as a boost, SEPIC or inverting converter. The LT8570­1's smaller switch enables the use of a smaller inductor in lower current applications. Both parts offer a programmable switching frequency between 200kHz and 1.5MHz, enabling designers to minimize external component sizes. The combination of a 3mm x 3mm DFN package (or MSOP­8E) and tiny externals ensures a very compact footprint while minimizing solution cost.
The LT8570 and LT8570­1 use internal high efficiency switches, which deliver efficiencies up to 86%. Undervoltage lockout (UVLO) is user adjustable for optimal system performance. A single feedback resistor sets the output voltage, minimizing external components. Other features include external synchronization capability, internal soft­start, thermal shutdown protection and the ability to work in inverting and SEPIC applications.
The LT8570/­1 is available in both a 3mm x 3mm DFN­8 and a thermally enhanced MSOP­8 package. Two temperature grades are available, with operation from ­40°C to 125°C (junction) for the extended and industrial grades. Pricing starts at $2.25 each for 1,000 piece quantities. Both versions are available from stock. For more information, www.linear.com/product/LT8570.

65V Power Switch

Current Limit Options of 0.5A (LT8570)

or 0.25A (LT8570­1)

Adjustable Switching Frequency

Single Feedback Resistor Sets VOUT

Synchronizable to External Clock

High Gain SHDN Pin Accepts Slowly

Varying Input Signals

Wide Input Voltage Range: 2.55V to 40V Low VCESAT Switch

Integrated Soft­Start Function

Easily Configurable as a Boost, SEPIC

or Inverting Converter

User Configurable Undervoltage Lockout

(UVLO)

Pin Compatible with LT3580 & LT8580

Tiny Thermally Enhanced 8­Lead

3mm x 3mm DFN and 8­Lead MSOP 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 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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