LT8309IS5#TRMPBF
ActiveRECTIFIER DRIVER, SECONDARY-SIDE, SYNCHRONOUS, FLYBACK, 4.5 TO 40 V, -40 TO 125 DEG C, TSOT-23-5
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LT8309IS5#TRMPBF
ActiveRECTIFIER DRIVER, SECONDARY-SIDE, SYNCHRONOUS, FLYBACK, 4.5 TO 40 V, -40 TO 125 DEG C, TSOT-23-5
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Technical Specifications
Parameters and characteristics for this part
| Specification | LT8309IS5#TRMPBF |
|---|---|
| Applications | Secondary-Side Controller |
| Current - Supply | 300 µA |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Package / Case | SOT-23-5 Thin, TSOT-23-5 |
| Supplier Device Package | TSOT-23-5 |
| Voltage - Supply [Max] | 40 VDC |
| Voltage - Supply [Min] | 4.5 V |
Pricing
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Description
General part information
LT8309 Series
LT8309 is a secondary-side synchronous rectifier driver that replaces the output rectifier diode in a flyback topology. By replacing the diode with an 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 and critical conduction mode. The gate driver features a 0.8ohm 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. Application includes high output current flybacks, high efficiency flybacks.
Documents
Technical documentation and resources
