60V input, low-IQ controller for boost, flyback, and SEPIC designs
The Analog Devices LT8357EMSE#PBF is a current-mode DC/DC controller that handles step-up and step-up/step-down conversion across boost, flyback, and SEPIC topologies. Its 3V to 60V supply range makes it a natural fit for 12V/24V/48V automotive, industrial, and telecom rails where input transients can spike well above the nominal bus. A single transistor driver output drives an external N-channel MOSFET; there is no synchronous rectifier, which keeps the BOM simple but means the Schottky catch diode dissipates the recirculation power. The controller includes current limit, enable, frequency control, power-good flag, and soft start — enough housekeeping to sequence a multi-rail system without a separate supervisor.
Package and thermal: 12-MSOP with exposed pad
The LT8357EMSE#PBF comes in a 12-lead TSSOP package with an exposed pad, supplier device code 12-MSOP-EP. For a controller that drives an external FET, the die dissipation is modest, but in a 2MHz flyback running at high duty cycle the pad still needs a via-stitched ground island to keep junction temperature below the 125°C limit. The tube is the standard shipping medium; if your pick-and-place line prefers tape-and-reel, check the reel option suffix.
If you need a second-source option for supply resilience, the closest functional match in the same family is the LTC3786IUD#PBF — it shares the same boost/flyback/SEPIC topology, transistor driver output, and control features, but adds synchronous rectification and operates from a 4.5V minimum supply.