Linear Technology: 60V Synchronous Step-Down DC/DC Controller Specified up to 150°C
Datum: Freitag, dem 14. Januar 2011
Thema: Auto Infos
MILPITAS, CA – January 11, 2011 – Linear Technology Corporation introduces the
LTC3810H-5, a high input voltage synchronous step-down DC/DC controller with guaranteed specifications for junction temperatures as high as 150°C. This device employs a constant
on-time valley current-mode control architecture, delivering very low duty cycles and extremely fast transient response with accurate cycle-by-cycle current limit without requiring a sense resistor. This rugged controller can directly step down voltages from 60V to an output voltage ranging from 0.8V to 93% of VIN. The powerful 1 Ohm onboard gate drivers minimize switching losses associated with driving N-channel MOSFETs at high frequency and high voltage for output currents up to 25A. Applications include 48V power conversion in telecom and datacom, as well as automotive and industrial systems susceptible to high surge voltages.
The LTC3810-5 features an adjustable minimum on-time that can be set as low as 100ns, enabling a high step-down ratio at high frequency. The operating frequency is selectable from 100kHz to 1MHz or can be synchronized to an external clock over the same range. Pulse skipping operation can be configured to maintain high efficiency at light loads. Additional features include programmable soft start or tracking, adjustable cycle-by-cycle current limit, output overvoltage protection, power good output signal and programmable undervoltage lockout.
The LTC3810H-5 is offered in a 5mm x 5mm QFN-32 package. For more information, visit www.linear.com/3810
Photo Caption: 60V Synchronous Step-Down Controller Operates up to 150°C
Summary of Features: LTC3810H-5
-40°C to 150°C Guaranteed Junction Temperature Operation
Up to 60V Input Voltage Operation
Wide Output Voltage Range from 0.8V to 0.93VIN
Synchronous Rectification
Adjustable Low Constant On-Time Down to 100ns
Valley Current-Mode Control
Large 1 Ohm Gate Drivers
No Current Sense Resistor Required
Power Good Output Signal
Adjustable Cycle-by-Cycle Current Limit
100kHz to 1Mhz Selectable Frequency or Synchronizable to an External Clock
Selectable Pulse Skipping or Continuous Operation
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 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, and µModule subsystems.
LT, LTC, LTM, µModule and are registered trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.
Linear Technology Corp.
Corporate Headquarters
1630 McCarthy Blvd.
Milpitas,CA 95035-7417
Ralf Stegmann
ralf@ezwire.com
Tel: +49 (0) 7131 9234–0
Veröffentlicht von >> xmedia << auf Freie-PresseMitteilungen.de
MILPITAS, CA – January 11, 2011 – Linear Technology Corporation introduces the
LTC3810H-5, a high input voltage synchronous step-down DC/DC controller with guaranteed specifications for junction temperatures as high as 150°C. This device employs a constant
on-time valley current-mode control architecture, delivering very low duty cycles and extremely fast transient response with accurate cycle-by-cycle current limit without requiring a sense resistor. This rugged controller can directly step down voltages from 60V to an output voltage ranging from 0.8V to 93% of VIN. The powerful 1 Ohm onboard gate drivers minimize switching losses associated with driving N-channel MOSFETs at high frequency and high voltage for output currents up to 25A. Applications include 48V power conversion in telecom and datacom, as well as automotive and industrial systems susceptible to high surge voltages.
The LTC3810-5 features an adjustable minimum on-time that can be set as low as 100ns, enabling a high step-down ratio at high frequency. The operating frequency is selectable from 100kHz to 1MHz or can be synchronized to an external clock over the same range. Pulse skipping operation can be configured to maintain high efficiency at light loads. Additional features include programmable soft start or tracking, adjustable cycle-by-cycle current limit, output overvoltage protection, power good output signal and programmable undervoltage lockout.
The LTC3810H-5 is offered in a 5mm x 5mm QFN-32 package. For more information, visit www.linear.com/3810
Photo Caption: 60V Synchronous Step-Down Controller Operates up to 150°C
Summary of Features: LTC3810H-5
-40°C to 150°C Guaranteed Junction Temperature Operation
Up to 60V Input Voltage Operation
Wide Output Voltage Range from 0.8V to 0.93VIN
Synchronous Rectification
Adjustable Low Constant On-Time Down to 100ns
Valley Current-Mode Control
Large 1 Ohm Gate Drivers
No Current Sense Resistor Required
Power Good Output Signal
Adjustable Cycle-by-Cycle Current Limit
100kHz to 1Mhz Selectable Frequency or Synchronizable to an External Clock
Selectable Pulse Skipping or Continuous Operation
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 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, and µModule subsystems.
LT, LTC, LTM, µModule and are registered trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.
Linear Technology Corp.
Corporate Headquarters
1630 McCarthy Blvd.
Milpitas,CA 95035-7417
Ralf Stegmann
ralf@ezwire.com
Tel: +49 (0) 7131 9234–0
Veröffentlicht von >> xmedia << auf Freie-PresseMitteilungen.de
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