Wide VIN Range Flyback Controller is Specified over a –55°C to 150°C Junction Temperature Range

May 25 2011 -MILPITAS, CA
  • Linear Technology Corporation announces the high reliability (MP-grade) version of the LTC3805/-5, a programmable frequency flyback controller that operates over a –55°C to 150°C junction temperature range. This high-performance shunt regulated input voltage PWM (pulse width modulation) controller enables for wide input voltages ranging from 5V to off-line applications and is ideal for users requiring one power supply for both 48V and 24V nominal input systems.


    The LTC3805/-5 has a current-mode control architecture that provides excellent transient response and cycle-by-cycle current limit while simplifying feedback loop stability. Fixed frequency operation is from 70kHz to 700kHz and can be synchronized to an external clock. The low start-up (40µA) and operating currents (360µA) minimize power loss and improve efficiency. Its low 100mV current-limit threshold further reduces power loss. Additional features include adjustable soft start, programmable slope compensation, remote on/off and overvoltage protection. The LTC3805MP-5 features a lower turn-on voltage of 4.5V versus 8.4V for the LTC3805MP.


    The LTC3805MP/-5 versions are available from stock in the thermally enhanced MSOP-10 package. Pricing starts at $4.76 each for 1,000 piece quantities. For more information, visit www.linear.com/product/LTC3805.


    Summary of Features: LTC3805MP/-5


    • Shunt Regulated Input Voltage
    • Low Start-Up & Operating Current
    • Current Mode Control
    • Low 100mV Current Sense Threshold Voltage
    • 70kHz to 700kHz Programmable Constant Frequency Operation
    • Synchronizable to an External Clock
    • Programmable Turn-On Voltage
    • Adjustable Slope Compensation
    • Cycle-by-Cycle & Hiccup Current-Limit Protection
    • Overvoltage Protection
    • Programmable Soft Start
    • Thermally Enhanced MSOP-10 Package

    –55°C to 150°C Operating Junction Temperature Flyback Controllers

    LTC3805-5MP PR Image

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