LTC3805EDD-5#PBF

LINEAR TECHNOLOGY  LTC3805EDD-5#PBF  直流/直流控制器, 可调频率, 8.8V至75V, 1路输出, 升压, 反激, SEPIC, 700kHz, DFN-10

The is a current-mode DC/DC Controller designed to drive an N-channel MOSFET in flyback, boost and SEPIC converter applications. Operating frequency and slope compensation can be programmed by external resistors. Programmable overcurrent sensing protects the converter from overload and short-circuit conditions. Soft-start can be programmed using an external capacitor and the soft-start capacitor also programs an automatic restart feature. It provides ±1.5% output voltage accuracy and consumes only 360µA of quiescent current during normal operation and only 40µA during micropower startup. Using a 9.5V internal shunt regulator, it can be powered from a high VIN through a resistor or it can be powered directly from a low impedance DC voltage from 4.7 to 8.8V.

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VIN and VOUT Limited only by external components

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4.5V Undervoltage lockout threshold

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Adjustable slope compensation

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Adjustable overcurrent protection with automatic restart

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Synchronizable to an external clock

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±1.5% Reference accuracy

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Only 100mV Current sense voltage drop

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RUN pin with precision threshold and adjustable hysteresis

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Programmable soft-start with one external capacitor

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360µA Low quiescent current