9.5V to 14V Input Voltage Range
Buck Converter, Built in 2.5A, 0.25Ω N-MOSFET
Boost Converter, Built in 3.5A, 0.15Ω N-MOSFET
VGH Linear Regulator Up to 40V/50mA
VGL Linear Regulator Down to –14V/50mA
Adjustable Power On Sequencing
Adjustable Switching Frequency 750k to 1,500kHz for Boost and Fixed Switching Frequency 750kHz for Buck
GD Function for Driving External PMOS
WQFN28- 5mm x 5mm Package Available
Fault and Thermal Protection
General Description
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.