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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.
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 ControllerDCR 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 Image40°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.
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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