AAT1105A

Advanced Analog Technology, Inc. AAT1105A Details are subject to change without notice. BUCK_BOOST & BOOST PWM CONTROLLER Features www.DataSheet4U.com z Complete General Description PWM Power Control Circuitry CH1: Buck_Boost, CH2: Boost z z z z z z z z Under-Voltage Lockout (UVLO) Protection Totem Pole Output Output Short Circuit Protection Dead-Time Control¡G 0% to 100% Wide Operating Frequency¡G 10kHz to 800kHz Shutdown Control Power Good Protection VDD Range: 2.6V~6.5V Pin Configuration TOP VIEW Ct Rt SHDN IE1 OE1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VREF SCP PGO IE2 OE2 DTC2 OUT2 VDD The AAT1105A provides an integrated two-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system. This device offers system engineers the flexibility to tailor-make the power supply circuitry for specific applications. Each channel contains its own error amplifier, PWM comparator, dead–time control (DTC), and output driver. The under-voltage protection, oscillator, short circuit protection (SCP) and voltage reference circuit are the common features for the two channels. The AAT1105A contains one step-up (boost) circuit at channel two (CH2) and one inverting (buck_boost) circuit at channel one (CH1). Dead-time control can be set to provide 0% to 100% dead-time through a resistive divider network. Soft-start can be implemented by paralleling the DTC resistor with a capacitor. Two dead-time control inputs are assigned for CH1 and CH2 individually...