The LT3957A is a wide input range, current mode DC/DC converter which is capable of generating either positive or negative output voltages. It can be configured as either a boost, flyback, SEPIC or inverting converter. It features an internal low side N-channel power MOSFET rated for 40V at 5A and driven from an internal regulated 5.2V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. The operating frequency of LT3957A can be set with an external resistor over a 100kHz to 1MHz range, and can be synchronized to an external clock using the SYNC pin. A minimum operating supply voltage of 3V, and a low shutdown quiescent current of less than 1μA, make the LT3957A ideally suited for battery-powered systems. The LT3957A features soft-start and frequency foldback functions to limit inductor current during start-up. The LT3957A has improved load transient performance compared to the LT3957. Features LT3957 - LT3957A Improved Load Transient Performance Applications * Automotive * Telecom * Industrial * Wide Input Voltage Range: 3V to 40V* Single Feedback Pin for Positive or Negative Output Voltage* Internal 5A/40V Power Switch* Current Mode Control Provides Excellent Transient Response* Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor* Synchronizable to an External Clock https://elecena.pl/product/2627099/boost-flyback-sepic-and-inverting-converter-with-5a-40v-switch 2012-03-30 https://elecena.pl/product/2627099/boost-flyback-sepic-and-inverting-converter-with-5a-40v-switch 2017-10-21 https://elecena.pl/product/2627099/boost-flyback-sepic-and-inverting-converter-with-5a-40v-switch 2025-01-20