LTC3780IUH#PBF Datasheet PDF - Linear Technology

●The LTC3780IUH#PBF is a high performance buck-boost Switching Regulator Controller that operates from input voltages above, below or equal to the output voltage. The constant frequency current-mode architecture allows a phase-lockable frequency of up to 400kHz. With a wide 4 to 30V (36V maximum) input and output range and seamless transfers between operating modes. The operating mode of the controller is determined through the FCB pin. For boost operation, the FCB mode pin can select among burst mode operation, discontinuous mode and forced continuous mode. During buck operation, the FCB mode pin can select among skip-cycle mode, discontinuous mode and forced continuous mode. Burst mode operation and skip-cycle mode provide high efficiency operation at light loads while forced continuous mode and discontinuous mode operate at a constant frequency. Fault protection is provided by an output overvoltage comparator and internal foldback current limiting.

● Power good output voltage monitor

● Internal LDO for MOSFET supply

● Quad N-channel MOSFET synchronous drive

● VOUT Disconnected from VIN during shutdown

● Adjustable soft-start current ramping

● Foldback output current limiting

● Selectable low current modes

● Output overvoltage protection