Datasheet Analog Devices LT3574IMS#PBF

LT3574
Isolated Flyback Converter
Without an Opto-Coupler
Features n n n n n n Description 3V to 40V Input Voltage Range
0.65A, 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
16-Lead MSOP Package The LT®3574 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. A 0.65A, 60V NPN power
switch is integrated along with all control logic into a
16‑lead MSOP package.
The LT3574 operates with input supply voltages from
3V to 40V, and can deliver output power up to 3W with …