LT3757 Datasheet | Linear Technology

.. LT3757 Boost, Flyback, SEPIC and Inverting Controller DESCRIPTION The LT®3757 is a wide input range, current mode, DC/DC controller which is capable of generating either positive or negative output voltages. It can be configured as either a boost, flyback, SEPIC or inverting converter. The LT3757 drives a low side external N-channel power MOSFET from an internal regulated 7.2V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. The operating frequency of LT3757 can be set with an external resistor over a 100k Hz to 1MHz range, and can be synchronized to an external clock using the SYNC pin. A low minimum operating supply voltage of 2.9V, and a low shutdown quiescent current of less than 1μA, make the LT3757 ideally suited for battery-operated systems. The LT3757 Features soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit. The device is available in a small 10-lead DFN (3mm × 3mm) or MSOP package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Features n n n n n n n n n n n Wide Input Voltage Range: 2.9V to 40V Positive or Negative Output Voltage Programming with a Single Feedback Pin Current Mode Control Provides Excellent Transient Response Programmable Operating Frequency (100k Hz-1MHz) with One External Resistor Synchronizeable to an External Clock Output Overvoltage Protection Low Shutdown Current < 1μA Internal 7.2V Low Dropout Voltage Regulator Programmable Input Undervoltage Lockout with Hysteresis Programmable Soft-Start Small 10-Lead DFN (3mm × 3mm) and Thermally Enhanced 10-Pin MSOP Packages APPLICATIONS n n n Automotive and Industrial Boost, Flyback, SEPIC and Inverting Converters Tele Power Supplies Portable Electronic Equipment TYPICAL APPLICATION High...