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For complete documentation, view the LTC4040 page

Part Number* Description Package Pins Price (1-99) Price (100+) QTY
LTC4040EUFD#PBF 2.5A Battery Backup Power Manager QFN 24 $4.14 $3.52
LTC4040EUFD#TRPBF 2.5A Battery Backup Power Manager QFN 24 $4.20 $3.58
LTC4040IUFD#PBF 2.5A Battery Backup Power Manager QFN 24 $4.71 $4.01
LTC4040IUFD#TRPBF 2.5A Battery Backup Power Manager QFN 24

Demo Boards

Part Number* Description Price (1-99) QTY
DC2118A LTC4040 Demo Board | 5VIN, 2A Single Cell Li-ion/LiFePO4 Buck Battery Charger with 2.5A Boost Backup Power Manager $150.00 1

* When ordering part numbers ending in #TR or #TRM for quantities less than (or not an even multiple of) a full reel, parts will be shipped in bulk or cut tape