Analog Devices LT8306

Description

The LT8306 is a micropower isolated flyback controller in a 6-lead ThinSOT™ package. 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. 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

Typical applications

• Power Supplies,
• Automotive
• Medical
• Industrial
• Isolated Telecom

More information

• Datasheet
• IC product information