An input capacitor with an effective capacitance of at least 3.5 µF is required on the VBAT pin.
The voltage rating of the input capacitor should in all cases be higher than the maximum input voltage, with an added margin. A minimum voltage rating of 6.3 V is recommended. For RF sensitive applications, place an additional 1 nF to 100 nF decoupling capacitor on VBAT.
The following table shows examples of capacitor models for VBAT.
| Manufacturer | Part number | Size | Capacitance (µF) | Voltage rating (V) | Type | |
|---|---|---|---|---|---|---|
| (metric) | (inch) | |||||
| Murata | GRM158R60J226ME01D | 0402 | 1005 | 22 | 6.3 | X5R |
| Samsung | CL05A106MQ5NUW | 0402 | 1005 | 10 | 6.3 | X5R |
| Murata | GRM155R60J106ME05 | 0402 | 1005 | 10 | 6.3 | X5R |
| Murata | GRM155R60J106ME15 | 0402 | 1005 | 10 | 6.3 | X5R |