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