EL7520 and EL7520A are 4-channel DC/DC controllers that provide a complete power supply system for TFT-LCD applications. They consist of a 1MHz PWM boost controller, which generates the main voltage for the column driver, and three LDO controllers for VON, VOFF, and VLOGIC supplies. They also include integrated start-up sequence and start-up delay control.

Features

• Complete TFT-LCD supply controller

- 1MHz PWM boost controller

- VON LDO controller

- VOFF LDO controller

- Logic supply LDO controller

• Integrated start-up sequence for VLOGIC/VBOOST, VOFF, VON or VLOGIC, VOFF, VBOOST, VON

- VLOGIC permanently enabled in A version (EL7520A)

• Programmable sequence delay

• In-rush current control

• Fully fault protected

• Thermal shutdown

• Internal soft-start

• 3V to 5.5V VDD

• 20 Ld 4x4 QFN package

• Low cost

• Pb-Free plus anneal available (RoHS compliant)

Applications

• LCD monitors (15”+)

• LCD-TV (up to 40”+)

• Notebook displays (up to 16”)

• Industrial/medical LCD displays