AAT1104A

Advanced Analog Technology, Inc. AAT1104/AAT1104A 2-CHANNEL SWITCHING REGULATOR CONTROLLER Features www.DataSheet4U.com z Complete General Description PWM Power Control Circuitry The AAT1104/AAT1104A provides an integrated two-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system, this device offers the systems engineer the flexibility to tailor the power supply circuitry to a specific application. Each channel contains its own error amplifier, PWM comparator, dead–time control and output driver. The under-voltage protection, oscillator, short circuit protection and voltage reference circuit are common for the two channels. Both channel of AAT1104/AAT1104A can be used for DC/DC converter operations including step-up, step-down, and inverting. Dead-time control (DTC) can be set to provide 0% to 100% dead time by resistive divider network. Soft start can be implemented by paralleling the DTC resistor with a capacitor. Two dead time control inputs are assigned for Ch-1 and Ch-2 individually, and dead time control inputs can be used to control on / off operation. With a minimum number of external components, the AAT1104/AAT1104A offers a simple and cost effective solution. *Spec is subject to change without notice in this document. z z z z z z z z Precision Reference¡G 2.505V±1% (25 oC) Under-voltage Lockout Protection Open Drain Output Output Short Circuit Protection Low Dissipation Current¡G 1.6mA Dead Time Control¡G 0 to 100% Wide Operating Fre...