RT9363A

RT9363A 3 Channels 90mA x1/x2 Charge Pump White LED Driver General Description The RT9363A is a compact, high efficient and highly integrated charge pump white LED driver. It maintains the highest efficiency by utilizing a x1/x2 fractional charge pump and low dropout current regulators. The RT9363A supports up to 3 white LEDs and regulates a constant current for uniform intensity. The part implements a 4-bit DAC for brightness control. Users can select external RSET or internal RSET by ISET pin. The dimming of white LEDs' current can be achieved by applying a pulse signal to the EN pin. There are totally 16 steps of current could be set by users. The part can support 15mA to 30mA for the 100% current setting. Users also can use the internal RSET for 100% current setting of 20mA just by connecting the ISET pin to VIN. The operating voltage range is from 2.8V to 5.5V. Internal soft start circuitry effectively reduces the inrush current while both start-up and mode transition. The load is disconnected from VIN while shutdown and the shutdown current is less than 1uA. RT9363A is available in a WDFN -10L 3x3 package. Features z z z z z z z z z z z z z z z Over 80% Average Efficiency Over Battery Life Support Up to 3 White LEDs 80mV Typical Current Source Dropout Support Up to 90mA Output Current 1% Typical LED Current Accuracy 0.7% Typical LED Current Matching Soft Start Function Automatic Charge Pump Mode Selection 1MHz Random Frequency Oscillator Over Voltage Protection 16-Ste...