LT8309HS5#TRMPBF
ActiveSECONDARY-SIDE SYNCHRONOUS RECTIFIER DRIVER
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LT8309HS5#TRMPBF
ActiveSECONDARY-SIDE SYNCHRONOUS RECTIFIER DRIVER
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LT8309HS5#TRMPBF |
|---|---|
| Applications | Secondary-Side Controller |
| Current - Supply | 300 µA |
| Mounting Type | Surface Mount |
| Package / Case | SOT-23-5 Thin, TSOT-23-5 |
| Voltage - Supply [Max] | 40 VDC |
| Voltage - Supply [Min] | 4.5 V |
LT8309 Series
Secondary-Side Synchronous Rectifier Driver
| Part | Current - Supply | Applications | Package / Case | Mounting Type | Voltage - Supply [Max] | Voltage - Supply [Min] | Operating Temperature [Max] | Operating Temperature [Min] |
|---|---|---|---|---|---|---|---|---|
Analog Devices | 300 µA | Secondary-Side Controller | SOT-23-5 Thin TSOT-23-5 | Surface Mount | 40 VDC | 4.5 V | ||
Analog Devices | 300 µA | Secondary-Side Controller | SOT-23-5 Thin TSOT-23-5 | Surface Mount | 40 VDC | 4.5 V | 125 °C | -40 °C |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 8.38 | |
| 10 | $ 5.76 | |||
| 25 | $ 5.08 | |||
| 100 | $ 4.32 | |||
| 250 | $ 3.96 | |||
| Digi-Reel® | 1 | $ 8.38 | ||
| 10 | $ 5.76 | |||
| 25 | $ 5.08 | |||
| 100 | $ 4.32 | |||
| 250 | $ 3.96 | |||
| Tape & Reel (TR) | 500 | $ 3.73 | ||
| 1000 | $ 3.55 | |||
| 1500 | $ 3.45 | |||
| 2500 | $ 3.41 | |||
Description
General part information
LT8309 Series
The LT8309 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 0.8Ω pull-down device for fast turn-offs. The 40V VCCrating 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.ApplicationsHigh Output Current FlybacksHigh Efficiency Flybacks
Documents
Technical documentation and resources