DESCRIPTION
The LT®8306 is a micropower isolated flyback
controller in a 6-lead ThinSOT™ package. By sampling
the isolated output voltage directly from the primaryside
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. The LT8306
drives a low side N-channel power MOSFET with 8V
gate drive.
The LT8306 has a wide input voltage range of 4.5V to
60V. The high level of integration and the use of
boundary and low ripple burst modes result in a
simple-to-use, low component count, and high
efficiency application solution for isolated power
delivery.

FEATURES
 Wide Input Voltage Range: 4.5V to 60V
 Low Quiescent Current
 120μA in Sleep Mode
 390μA 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
 VOUT Set with a Single External Resistor
 8V Gate Drive for External NFET
 No Transformer Third Winding or Opto-Isolator
Required for Regulation
 Accurate EN/UVLO Threshold and Hysteresis
 Internal Compensation and Soft-Start
 Output Short-Circuit Protection
 6-Lead TSOT-23 Package
 AEC-Q100 Qualified for Automotive Applications

APPLICATIONS
 Isolated Telecom, Automotive, Industrial, Medical Power Supplies
 Isolated Auxiliary/Housekeeping Power Supplies