EL7585
TFT-LCD Power Supply

Key Features

• 3.5A current limit FET options
• 3V to 5V input
• Up to 20V boost out
• 1% regulation on all outputs
• V_BOOST/V_LOGIC-V_OFF-V_ON or V_LOGIC-V_OFF-V_BOOSTV_ON sequence control
• Programmable sequence delay
• Fully fault protected
• Thermal shutdown
• Internal soft-start
• 20 Ld QFN packages
• Pb-Free plus anneal available (RoHS Compliant)

Description

The EL7585 represents a multiple output regulators for use in all large panel, TFT-LCD applications. It features a single boost converter with integrated 3.5A FET, two positive LDOs for V_ON and V_LOGIC generation, and a single negative LDO for V_OFF generation. The boost converter can be programmed to operate in either P-mode or PI-mode for improved load regulation.

The EL7585 also integrates fault protection for all four channels. Once a fault is detected, the device is latched off until the input supply or EN is cycled. This device also features an integrated start-up sequence for V_BOOST, V_OFF, then V_ON or for V_OFF, V_BOOST, and V_ON sequencing. The latter requires a single external transistor. The timing of the start-up sequence is set using an external capacitor.

The EL7585 is specified for operation over the -40°C to +85°C temperature range.

Applications

• LCD monitors (15"+)
• LCD-TV (up to 40"+)
• Notebook displays (up to 16")
• Industrial/medical LCD displays