Buck converter for 400 mA rails — what the specs mean
Output is adjustable from 0.7 V up to the input voltage, so it covers common low-voltage rails like 1.2 V, 1.8 V, or 3.3 V.
Obsolete — planning the replacement path
The TPS62220DDCRG4 is officially marked obsolete. For new designs or long-term production, plan a migration to a current-generation synchronous buck from the TPS622 family or a pin-compatible alternative.
Housed in a SOT-23-5 Thin (TSOT-23-5) package, the part is surface-mount with a 0.95 mm pitch — straightforward for hand assembly or reflow.