Features: •Complete TFT-LCD supply controller·1MHz PWM boost controller·VONLDO controller·VOFFLDO controller·Logic supply LDO controller•Integrated start-up sequence for VLOGIC/VBOOST, VOFF, VONor VLOGIC, VOFF, VBOOST, VON·VLOGICpermanently enabled in 'A version (EL7520A)•Program...
EL7520: Features: •Complete TFT-LCD supply controller·1MHz PWM boost controller·VONLDO controller·VOFFLDO controller·Logic supply LDO controller•Integrated start-up sequence for VLOGIC/VBOOST, V...
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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 VLOGICsupplies. They also include integrated start-up sequence and start-up delay control.EL7520 and EL7520A operate from 3V to 5.5V. The boost controller can drive a wid e range of output current depending on the external FET. It can be programmed to operate in either P-mode for fa st transient response or PI-mode for improved load regulation. The EL7520 and EL7520A also integrate fault pr otection for all four output channels. When a fault is detected, the device is latched off until either the input supply voltage or enable is cycled. Therefore, they are ideal to use in any size of TFT-LCD panels.The EL7520 and EL7520A are available in a 20Ld4x4QFN package with maximum height of 0.9mm and is specified for operation of the -40°C to +85°C temperature range.