LTC3803ES6-3#PBF

LINEAR TECHNOLOGY  LTC3803ES6-3#PBF  直流/直流控制器, 恒频, 9.2V至75V, 1路输出, 反激, 240kHz, TSOT-23-6

The is a constant frequency current-mode Flyback Controller optimized for driving N-channel MOSFETs in high input voltage applications. Constant frequency operation is maintained down to very light loads, resulting in less low frequency noise generation over a wide range of load currents. Slope compensation can be programmed with an external resistor. The LTC3803-3 provides ±1.5% output voltage accuracy and consumes only 240µA of quiescent current. Ground referenced current sensing allows the controller based converters to accept input supplies beyond the LTC3803-3"s absolute maximum VCC. A micropower hysteretic start-up feature allows efficient operation at high input voltages. For simplicity, it can also be powered from a high VIN through a resistor, due to its internal shunt regulator. An internal undervoltage lockout shuts down the controller when the input voltage is too low to provide sufficient gate drive to the external MOSFET.

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Adjustable slope compensation

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Internal soft-start

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±1.5% Reference accuracy

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Current mode operation for excellent line and load transient response

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No minimum load requirement