The internal LDO of TPS61376 outputs a regulated voltage of 4.8V with 10-mA output current capability. When the input voltage at the VIN pin is below 5.25V, the internal LDO is powered by the VOUT pin, when the input voltage at the VIN pin is above 5.5V, the internal LDO is powered by the VIN pin. A ceramic capacitor is connected between the VCC pin and AGND pin to stabilize the VCC voltage and also decouple the noise on the VCC pin. The value of this ceramic capacitor should be above 1μF. A ceramic capacitor with an X7R or X5R grade dielectric with a voltage rating higher than 10V is recommended.