GENERAL DESCRIPTION
FEATURES
Auto-adjust z 350mA maximum load current charge pump achieves high efficiency for Li-Ion battery z <10% feedback voltage reference error Micro Bridge Technology Co.,Ltd. supply. Few external components (two flying capacitors, two filter capacitors at VIN and VOUT, and one feedback resistor) make PT4305 ideally suited for mobility application. The current through the LED can be pre-set by feedback resistor. And the LED can also be dimmed by PWM control signal. Built-in soft-start circuit prevents the inrush current from supply source during power on and 1x/1.5x mode change. Thermal shutdown and current limiter prevent PT4305 being damaged by the high-level current through it. Shutdown current less than 1uA makes the battery time longer. PT4305 is packaged with QFN-10, MSOP-10 and SOP-14, and it is also available with different feedback voltage references: 315mV, 236mV, 157mV, and 78mV. z Dimming LED by PWM signal through EN/PWM pin z Less than 1uA shutdown c...
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