EL7583IREZ-T7 Converter TFT LCD Voltage Regulator IC 2 Output 20-HTSSOP

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

Functional Block Diagram

specification of EL7583IREZ-T7

ORIGINAL

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