AAT2688

DATA SHEET AAT2688 4.5A PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters General Description The AAT2688 provides two independently regulated DC outputs: a high voltage synchronous step-down (Buck) regulator and a low input voltage step-down low dropout (LDO) regulator. The PMIC is optimized for low cost 12V adapter inputs, making the device the ideal system-ona-chip power solution for consumer communications equipment. Channel 1 is a step-down regulator with an input voltage range of 6.0V to 24V, providing up to 4.5A output current. 490kHz fixed switching frequency allows small L/C filtering components. Channel 1 utilizes voltage mode control configured for optimum performance across the entire output voltage and load range. Channel 2 is a low-dropout (LDO) regulator providing up to 600mA output current. The device provides low output noise, low quiescent current, and excellent transient response. The step-down regulator includes integrated over-current, soft-start and over-temperature protection. Independent input and enable pins provide maximum design flexibility. The AAT2688 is available in the Pb-free 4mm x 5mm 24-pin TQFN package. The rated operating temperature range is -40°C to 85°C. Features 2-Output Step-Down Converters: Channel 1 (Buck): VIN1 = 6.0 to 24.0V ▪ VOUT1 Adjustable from 0.8V to 5.5V ▪ IOUT1 up to 4.5A ▪ High Switching Frequency ▪ Voltage Mode Control ▪ High Accuracy ±1.5% ▪ PWM Fixed Frequency for Low Rippl...