EL7581 - Renesas

EL7581 3-Channel DC/DC Converter

CONDITIONS MIN TYP MAX UNIT DC/DC BOOST CONVERTER IQ1_B Quiescent Current - Shut-down ENBN = ENP = 0V 0.8 10 µA IQ2_B V(FBB) Quiescent Current - Switching Feedback Voltage ENBN = VDDB 1.275 4.8 1.300 8 1.325 mA V VREF VROSC I(FBB) Reference Voltage Oscillator Set Voltage Feedback Input Bias Current 1.260 1.260 1.310 1.325 0.1 1.360 1.390 .

Features

a PWM boost converter with 2.7V to 14V input capability and 5V to 17V output, which powers the column drivers and provides up to 720mA @12V, 570mA @ 15V from 5V input. A pair of charge pump control circuits provide regulated outputs of VON and VOFF supplies at 8V to 40V and -5V to -40V, respectively, each at up to 60mA. The EL7581 features adjustable switching frequency, adjustable soft start, and a separate output VON enable control to allow selection of supply start-up sequence. An over-temperature feature is provided to allow the IC to be automatically protected from excessive power dissipa.