The EL7583 is a 3-channel DC/DC converter IC which is

designed primarily for use in TFT-LCD applications. It

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 470mA @ 12V, 370mA @ 15V

from 5V supply. 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 EL7583 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 dissipation.

The EL7583 is available in a standard 20 Ld TSSOP

package and the Pb-free 20 Ld HTSSOP package. Both are

specified for operation over the full -40°C to +85°C

temperature range.

Features

• TFT-LCD display supply

- Boost regulator

- VON charge pump

- VOFF charge pump

• 2.7V to 14V VIN supply

• 5V < VBOOST < 17V

• 5V < VON < 40V

• -40V < VOFF < 0V

• VBOOST = 12V @ 470mA

• VBOOST = 15V @ 370mA

• High frequency, small inductor DC/DC boost circuit

• Over 90 efficient DC/DC boost converter capability

• Adjustable frequency

• Adjustable soft-start

• Adjustable outputs

• Small parts count

• Pb-free plus anneal available (RoHS compliant)

Applications

• TFT-LCD panels

• PDAs