LT8301

FEATURES n 2.7V to 42V Input Voltage Range n 1.2A, 65V Internal DMOS Power Switch n Low Quiescent Current: n 100µA in Sleep Mode n 350µA in Active Mode n Boundary Mode Operation at Heavy Load n Low-Ripple Burst Mode® Operation at Light Load n Minimum Load <0.5% (Typ) of Full Output n VOUT Set with a Single External Resistor n No Transformer Third Winding or Opto-Isolator Required for Regulation n Accurate EN/UVLO Threshold and Hysteresis n Internal Compensation and Soft-Start n Output Short-Circuit Protection n 5-Lead TSOT-23 Package n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n Isolated Telecom, Automotive, Industrial, Medical Power Supplies n Isolated Auxiliary/Housekeeping Power Supplies LT8301 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/1.2A Switch DESCRIPTION The LT®8301 is a 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 a single external resistor. Internal compensation and soft-start further reduce external component count. 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 1.2A, 65V DMOS power switch is integrated along with all high voltage circuitry and control logic into a 5...