Intersil Corp. (Milpitas, CA) introduced its new EL7584, a four-channel dc/dc converter IC, which is designed primarily for use in TFT-LCD applications. The boost converter has 2V to 14V input capability and provides 5V to 17V output, which powers the column drivers and provides up to 370mA at 15V. A pair of charge pump control circuits provide outputs to allow the external generation of V(ON) and V(OFF) supplies at 5V to 40V and 0V to -40V, respectively, each at up to 60mA for V(BOOST) = 15V. The V(COM) buffer provides up to 50mA continuous output current from 2V to 13V.
The EL7584 features an adjustable switching frequency and on-chip power sequence to simplify startup operation. A separate input is available to externally increase the default delay of the positive charge pump. An over-temperature feature is provided to allow the IC to be automatically protected from excessive power dissipation. The EL7584 is available in a 24-pin TSSOP package and is specified for operation over the full -40°C to +85°C temperature range.