This application note describes the capacitor selection for the internal regulator output pins of the USB97C223 and USB97C243
The document specifies capacitor requirements for the internal 1.8V analog and digital regulator output pins of the USB97C223 and USB97C243. It details the necessary capacitance value, tolerance, and maximum Equivalent Series Resistance (ESR) to ensure proper performance.
| Analog Regulator Output Capacitance | 10uF +/- 20 % |
|---|---|
| Analog Regulator Output ESR | < 0.65 Ohm |
| Digital Regulator Output Capacitance | 10uF +/- 20 % |
| Digital Regulator Output ESR | < 0.65 Ohm |
SMSC recommends the use of ceramic 10uF capacitors to meet the low ESR requirements.
Yes, tantalum capacitors with low ESR specifications can be used, though they typically have an ESR closer to 0.5 Ohm.