GENERAL DESCRIPTION
The ADD8733 is a 4-channel regulator with two VCOM amplifiers and gate pulse modulation (GPM) that provides all the necessary voltages for thin film transistor (TFT) liquid crystal displays (LCD). Included is a step-up regulator, a stepdown regulator for digital logic, two VCOM amplifiers, two charge-pump regulators for VGH and VGL, and an integrated gate pulse modulator.

FEATURES
   Step-up switching regulator with 3 A switch current limit
      8 V to 16.5 V input voltage range
      Adjustable output voltage up to 20 V
      1.2 A series switch for power sequencing
      Overvoltage protection (OVP)
   Step-down switching regulator with 3 A switch current limit
      8 V to 16.5 V input voltage range
      Adjustable output voltage down to 2.5 V
   Gate pulse modulator circuitry
      Independently adjustable delay and falling slope
   Positive charge-pump regulator for VGH
   Negative charge-pump regulator for VGL
   Two VCOM amplifiers
   General
      Power supply sequencing
      Thermal fault protection
      650 kHz or 1.2 MHz PWM frequency
      Soft start
      Undervoltage lockout (UVLO)
      48-lead RoHS compliant LFCSP

APPLICATIONS
   TFT LCD panels for TVs and monitors