AAT2687

DATA SHEET AAT2687 PMIC Solution for 24V Systems with 2 High Performance Step-Down Converters General Description The AAT2687 provides two independently regulated DC outputs; consisting of a high voltage step-down regulator and a low input voltage low dropout (LDO) regulator. The PMIC is optimized for low-cost 12V adapter inputs, making the device the ideal system-on-a-chip power solution for consumer communications equipment. Channel 1 is a step-down regulator with an input voltage range 6.0 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 extremely low output noise, low quiescent current and excellent transient response. The controller includes integrated cycle-by-cycle overcurrent protection, soft-start and over-temperature disable features. Independent input and enable pins provide maximum design flexibility. The AAT2687 is available in the Pb-free, 4x5mm 24-pin TQFN package. The rated operating temperature range is -40C to 85C. Features 2-Output Step-Down Converters: ▪ Channel 1 Step-Down: VIN1 = 6V to 24V VOUT1 Adjustable from 1.5V to 5.5V IOUT1 up to 4.5A High Switching Frequency Voltage Mode Control PWM Fixed Frequency for Low-Ripple ▪ Channel 2 (LDO): VIN2 = 2.7V...