SLVSDD1E December 2017 – January 2019 TPS62800 , TPS62801 , TPS62802 , TPS62806 , TPS62807 , TPS62808
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
Because the buck converter has a pulsating input current, a low ESR ceramic input capacitor is required for best input voltage filtering to minimize input voltage spikes. For most applications a 4.7-µF input capacitor is sufficient. When operating from a high impedance source, like a coin cell, a larger input buffer capacitor ≥10uF is recommended to avoid voltage drops during startup and load transients. The input capacitor can be increased without any limit for better input voltage filtering. The leakage current of the input capacitor adds to the overall current consumption.
Table 5 shows a selection of input and output capacitors.
CAPACITANCE [μF] | CAPACITOR PART NUMBER | SIZE IMPERIAL (METRIC) | DIMENSIONS L x W X T | SUPPLIER(1) |
---|---|---|---|---|
4.7 | GRM155R60J475ME47D | 0402 (1005) | 1.0mm x 0.5mm x 0.6mm max. | Murata |
4.7 | GRM035R60J475ME15 | 0201 (0603) | 0.6mm x 0.3mm x 0.55mm max | Murata |
10 | GRM155R60J106ME15D | 0402 (1005) | 1.0mm x 0.5mm x 0.65mm max. | Murata |