The LTC3873 is a constant frequency, current mode, boost, flyback or SEPIC DC/DC controller that drives an N-channel power MOSFET in high input and output voltage converter applications. Soft-start can be programmed using an external capacitor. The LTC3873 provides ±1.5% output voltage accuracy and consumes only 300μA quiescent current during normal operation and only 55μA during micropower start-up. Using a 9.3V internal shunt regulator, the LTC3873 can be powered from a high input voltage through a resistor or it can be powered directly from a low impedance DC voltage of 9V or less. The LTC3873 is available in 8-lead ThinSOT and 2mm x 3mm DFN packages. LTC3873 LTC3873-5 VCC UV+ 8.4V 4.1V VCC UV– 4V 2.9V Applications * Telecom Power Supplies * 42V and 12V Automotive Power Supplies * Portable Electronic Equipment * VIN and VOUT Limited Only by External Components * Internal or Programmable External Soft-Start * Constant Frequency 200kHz Operation * Adjustable Current Limit * Current Sense Resistor Optional * Maximum 60V on SW Node with RDS(ON) Sensing https://elecena.pl/product/382380/no-r-constant-frequency-current-mode-boost-flyback-sepic-dc-dc-controller 2007-05-09 https://elecena.pl/product/382380/no-r-constant-frequency-current-mode-boost-flyback-sepic-dc-dc-controller 2016-03-16 https://elecena.pl/product/382380/no-r-constant-frequency-current-mode-boost-flyback-sepic-dc-dc-controller 2025-01-21