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Linear Technology: DC/DC Controllers Generate Positive or Negative Regulated Voltage
Linear Technology
MP-grade versions of the LT3757 and LT3758 wide input range DC/DC controllers for boost, flyback, SEPIC and inverting power supply applications. These devices are capable of generating either a positive or negative regulated output voltage with a single device by having two internal voltage feedback error amplifiers and reference voltages. These H- and MP-grade versions are tested and guaranteed to operating junction temperature ranges from -40°C to 150°C and -55°C to 125°C, respectively.
The LT3757 operates with an input voltage ranging from 2.9V to 40V and the LT3758 operates over a 5.5V to 100V input voltage range. The devices achieve efficiencies up to 96%, making them well suited for industrial, automotive, military, medical and telecom applications. With a programmable fixed or synchronizable operating frequency from 100kHz to 1MHz, designers can choose a wide range of inductors and capacitors to optimize size, performance and cost. The fixed frequency, current mode control results in stable operation over a wide range of supply and output voltages, along with all ceramic capacitor designs, enabling a smaller solution size. Additional features include programmable soft-start, input undervoltage lockout, output overvoltage and overcurrent protection.
Both grades are available in the thermally enhanced MSOP-10 package. For more information, visit www.linear.com.
Photo Caption: -55°C to 150°C Operating Temperature Boost, Multitopology Controller
Summary of Features: LT3757/LT3758
• For Boost, Flyback, SEPIC & Inverting Applications
• LT3757 Input Operating Voltage: 2.9V to 40V
• LT3758 Input Operating Voltage: 5.5V to 100V
• Positive or Negative Output Voltage Setting with a Single Feedback Pin
• Selectable Fixed 100kHz to 1MHz Operating Frequency
• Synchronizable to an External Cloc
• Integrated Low-Side Driver
• True Current Mode Control
• Low Shutdown Current < 1µA
• Output Overvoltage & Overcurrent Protection
• Programmable Input Undervoltage Lockout with Hysteresis
• H-Grade: -40°C to 150°C Operating Junction Temperature
• MP-Grade: -55°C to 125°C Operating Junction Temperature
Unternehmensprofil:
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, µModule products, and many other analog functions. Applications for Linear Technology?s high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
LT, LTC, LTM, µModule and are registered trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.
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