LTC1871 Datasheet PDF

●The LTC1871EMS#PBF is a wide input range, no RSENSE™ current mode boost, flyback and SEPIC Controller that drives an N-channel power MOSFET and requires very few external components. Intended for low to medium power applications, it eliminates the need for a current sense resistor by utilizing the power MOSFET"s on-resistance, thereby maximizing efficiency. This ICs operating frequency can be set with an external resistor over a 50kHz to 1MHz range and can be synchronized to an external clock using the MODE/SYNC pin. Burst Mode operation at light loads, a low minimum operating supply voltage of 2.5V and a low shutdown quiescent current of 10µA make this ideally suited for battery-operated systems.

● High efficiency (no sense resistor required)

● Current mode control provides excellent transient response

● High maximum duty cycle (92% typical)

● ±2% Run pin threshold with 100mv hysteresis

● ±1% Internal voltage reference

● 10µA IQ micropower shutdown

● Programmable operating frequency (50kHz to 1MHz) with one external resistor

● User-controlled pulse skip or burst Mode® operation

● Internal 5.2V low dropout voltage regulator

● Output overvoltage protection