DESCRIPTION
The LT®8302/LT8302-3 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation resistor. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. A 3.6A, 65V DMOS power switch is integrated along with all the high voltage circuitry and control logic into a thermally enhanced 8-lead SO package.

FEATURES
■ 3V to 42V Input Voltage Range
■ 3.6A, 65V Internal DMOS Power Switch
■ Low Quiescent Current:
   ■ 106µA in Sleep Mode
   ■ 380µA in Active Mode
■ Quasi-Resonant Boundary Mode Operation at Heavy Load
■ Low Ripple Burst Mode® Operation at Light Load
■ Minimum Load < 0.5% (Typ) of Full Output
■ No Transformer Third Winding or Opto-Isolator Required for Output Voltage Regulation
■ Accurate EN/UVLO Threshold and Hysteresis
■ Internal Compensation and Soft-Start
■ Temperature Compensation for Output Diode
■ Output Short-Circuit Protection
■ Thermally Enhanced 8-Lead SO Package
■ AEC-Q100 Qualified for Automotive Applications

APPLICATIONS
■ Isolated Automotive, Industrial, Medical Power Supplies
■ Isolated Auxiliary/Housekeeping Power Supplies