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