AAT1100

The AAT1100 provides an integrated triple-channel  pulse-width-modulation (PWM) solution for the  power supply of DC-DC system; this device offers  system engineer the flexibility to custom-make the  power supply circuitry to a specific application.  Each channel contains its own error amplifier, PWM comparator, dead-time control (DTC) and output driver. The under-voltage protection, oscillator, short circuit protection and voltage  reference circuit are common features of the three channels.

The AAT1100 contains two boost circuits (CH1, CH3) and a buck-boost circuit (CH2). DTC can be  set to provide 0% to 100% dead-time through a  divider network. Soft-Start can be implemented by  paralleling the DTC resistor with a capacitor. Two  DTC inputs are assigned for CH1, CH3 pair and  CH2 individually, and DTC inputs can be used to  control on / off operation.  In addition, this device  can operate from 2.5V to 7.0V supply voltages to  achieve efficient operation in low power system.   With a minimal number of external components, the  AAT1100 offers a simple and cost effective  solution.