EL7585 - Intersil Corporation

EL7585 TFT-LCD Power Supply

3 Enabled, LX not switching Disabled 1.7 5 5.5 2.5 20 V mA µA Oscillator Frequency 900 1000 1100 kHz Boost Output Range Boost Feedback Voltage TA = 25°C 5.5 1.192 1.188 1.205 1.205 0.9 TA = 25°C 1.19 1.187 1.215 1.215 100 20 1.218 1.222 V V V V FBB Fault Trip Point Reference Voltage 1.235 1.238 V V nF % VREF Capacitor Maximum Duty Cycle Switc.

Features

a single boost converter with integrated 3.5A FET, two positive LDOs for VON and VLOGIC generation, and a single negative LDO for VOFF 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 VBOOST, VOFF, then VON or for VOFF, VBOOST, and VON sequencing. The latter requires a single external transistor. The timing .