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60V Dual Output Synchronous Step­Down Controller with Adjustable 5V to 10V Gate Drive Draws Only 29µA in Standby

MILPITAS, CA ­ April 15, 2015 ­ Linear Technology Corporation announces the LTC3892, a high voltage dual output synchronous step­down DC/DC controller that draws only 29µA when one output is active and 34µA when both outputs are enabled. The 4.5V to 60V input supply range is designed to protect against high voltage transients, ensuring continuous operation during automotive cold crank and to accommodate a broad range of input sources
and battery chemistries. Each output can be set from 0.8V to 99% of VIN at output currents over 20 amps with efficiencies as high as 96%, making it well suited for 12V or 24V automotive, heavy equipment, industrial control,
robotics and telecom applications.
The LTC3892/­1's adjustable 5V to 10V gate drivers enable the use of logic­ or standard­level MOSFETs to maximize efficiency. It operates with a selectable fixed frequency between 50kHz and 900kHz, and can be synchronized to an external clock from 75kHz to 850kHz. The user can select from continuous operation, pulse­
skipping and low ripple Burst Mode® operation during light loads. The LTC3892/­1's 2­phase operation reduces
input filtering and capacitance requirements. Its current mode architecture provides easy loop compensation, fast transient response, fixed frequency operation, excellent line regulation and easy current sharing with paralleled phases for higher current. Output current sensing is accomplished by measuring the voltage drop across the output inductor (DCR) for the highest efficiency or by using an optional sense resistor for high accuracy. Current foldback limits MOSFET heat dissipation during overload conditions. This device is available in two versions; the LTC3892 being the full­featured part with two power good signals, adjustable current limit and fixed 3.3V or 5V output voltage options.
The LTC3892 is available in a 32­lead 5mm x 5mm QFN package and the LTC3892­1 is available in a 28­lead TSSOP package. 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 guaranteed from ­55°C to
150°C. The 1,000­piece price starts at $4.82 each. For more information, visit www.linear.com/product/LTC3892.

Summary of Features: LTC3892/­1

Wide Input Voltage Range:

4.5V to 60V

Wide Output Voltage Range:

0.8V to 0.99VIN

29µA Quiescent Current with One

Output Active & 34µA with Both Outputs

Active

Adjustable 5V to 10V Gate Drive

Voltage

Synchronous Rectification for up to 95% Efficiency

High Voltage Dual Output DC/DC Step­Down Controller


DCR or RSENSE Current Sense ®

Selectable Low Ripple Burst Mode

Operation, Pulse­Skipping or Continuous

Operation

Selectable Fixed Operating Frequency from 50kHz to 900kHz

Phase­Lockable Frequency from 75kHz to 850kHz


Current Mode Control for Fast Transient Response & Easy Loop Compensation Adjustable Soft­Start

Output Overvoltage & Overcurrent

Foldback Protection

Extended & Industrial Temp Grades:

­40°C to 125°C Operating Junction Temp

Automotive Temp Grade:

Click Photo for High­Res Image

­40°C to 150°C Operating Junction Temp

Military Temp Grade:

­55°C to 150°C Operating Junction Temp

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 and µModule are registered trademarks and True Color
PWM is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.

Worldwide Contacts North America and General Information

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

China (PRC)

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

Japan

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

Korea

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

Taiwan

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

Germany

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

UK & Nordic

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

Italy

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

France

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

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