The AAT1133 provides a Boost PWM converter for AVDD, which acts pseudo-CCM mode to avoid DCM condition. Two high voltage Linear Regulator for VGH and VGL, a Buck PWM converter for Vlogic. By controlling ENA1 ,ENA2  and connecting two external capacitors to DLY1, DLY2, the best power up sequencing of AAT1133 can be achieved GD is the open drain output signal which goes low when the AVIN is larger than UVLO. Connecting GD to an extra PMOS transistor can keep AVDD low before OS is ready.
The AAT1133 consist of an on-chip voltage reference, oscillator, error amplifier, current sense circuit, comparator, under-voltage lockout protection and adjustable soft-start circuit for AVDD. The thermal and power fault protection prevents excessive power from damaging the internal circuit.
With the minimal external components, the  AAT1133 offers a simple and economical solution for TFT LCD TV power solution.