SLVSC52B July 2013 – September 2015 TPS62152-Q1
PRODUCTION DATA.
The TPS62590-Q1 device is designed to operate with a wide range of input voltages ranging from 4 V to 17 V. For most applications, a 10-μF capacitor is sufficient and recommended at the PVIN pin. Connect a capacitor with a larger value to further reduce input current ripple. The input capacitor buffers the input voltage for transient events and also decouples the converter from the supply. TI recommends using a low-ESR multilayer ceramic capacitor for the best filtering. Place the capacitor between the PVIN and PGND pins, as close as possible to these pins. Although the AVIN and PVIN supply must come from the same input source, placing a capacitor with a value of 0.1 μF from the AVIN pin to the AGND pin is recommended to avoid potential noise coupling. Use of an RC low-pass filter from the PVIN to AVIN pin is allowed but not required.
Capacitance derating for aging, temperature, and DC bias must be taken into consideration while determining the capacitor value.