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Datasheet Linear Technology LT8309ES5#TR

Linear Technology LT8309ES5#TR

Manufacturer:Linear Technology
Series:LT8309
Part Number:LT8309ES5#TR

Secondary-Side Synchronous Rectifier Drive

Documents:

Manufacturer's Classification:

Power Management > Power Control > Secondary Side Controllers

Other Names: LT8309ES5TR, LT8309ES5 TR

Docket:
LT8309 Secondary-Side Synchronous Rectifier Driver FeaTures n DescripTion
The LT®8309 is a secondary-side synchronous rectifier driver that replaces the output rectifier diode in a flyback topology. By replacing the diode with a N-channel MOSFET, applications are no longer restricted by the heat constraints of the output diode. The IC replicates the behavior of a diode by sensing the drain-to-source voltage to determine when the current becomes negative. The LT8309's low minimum on-and off-times help improve noise immunity. The fast propagation delay of 26ns allows applications to operate in discontinuous conduction mode (DCM) and critical conduction mode (CrCM). The gate driver features a 0.8 pull-down device for fast turn-offs. The 40V VCC rating allows the part to be driven from the output voltage or the rectified drain voltage of the MOSFET. A low quiescent current of 400µA maximizes efficiency at low output currents.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Te...

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