LT3573EMSE#PBF

LT®3573 is a monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation. The part senses the isolated output voltage directly from the primary-side flyback waveform. The LT3573 operates with input supply voltages from 3V to 40V, and can deliver output power up to 7W with no external power devices. The LT3573 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation. Typical applications are industrial, automotive and medical isolated power supplies.

• 1.25A, 60V integrated NPN power switch
• Boundary mode operation, no transformer third winding or opto-isolator required for regulation
• Improved primary-side winding feedback load regulation
• VOUT set with two external resistors, BIAS pin for internal bias supply and power NPN driver
• Programmable soft-start, programmable power switch current limit
• Quiescent current is 3.5mA typical (SS=0V)
• Maximum switching frequency is 1000KHz typical
• 16-lead plastic MSOP package
• Temperature rating range from -40°C to 125°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party