This document describes the capacitor selection for the internal regulator output pins of USB97C223 and USB97C243. Circuit diagrams and other relevant information are provided as illustrations of typical applications. It is noted that the information provided may not be sufficient for construction purposes and may contain inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice.
This application note provides specific capacitor requirements for the VDDP (Analog Regulator) and VDDCORE (Digital Regulator) output pins on the USB97C223 and USB97C243 integrated circuits. It specifies that a 10uF capacitor with less than 0.65 Ohm ESR is required for stable operation.
| Capacitor Value | 10uF +/- 20 % |
|---|---|
| Maximum ESR | < 0.65 Ohm |
SMSC recommends the use of ceramic capacitors, as they typically have an ESR of less than 0.1 Ohm.
Yes, tantalum capacitors with low ESR specifications can also be used, though they typically have an ESR closer to 0.5 Ohm.