TPS66021: CN02 SUMUP need know the differences between MPN: TPS66021YBGR & TPS66121YBGR

Part Number: TPS66021

HI TI TEam,

Due to SUMUP part# EIC-00746 facing huge shortages per TIschedule, TI suggest use MPN: TPS66021YBGR as replacement MPN for MPN:  TPS66121YBGR. We need know the differnees between these two MPNs. We unable identify from data sheet. Please help provide the info instead keep asking us checking data sheet.