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For complete documentation, view the LTC4057-4.2 page

Part Number* Description Package Pins Price (1-99) Price (100+) QTY
LTC4057ES5-4.2#PBF * Monolithic Li-Ion Battery Charger w/o term. SOT 5 $2.14 $1.76
LTC4057ES5-4.2#TRMPBF Monolithic Li-Ion Battery Charger w/o term. SOT 5 $2.14 $1.76
LTC4057ES5-4.2#TRPBF Monolithic Li-Ion Battery Charger w/o term. SOT 5 $2.14 $1.76

Demo Boards

Part Number* Description Price (1-99) QTY
DC654A LTC4057ES5-4.2 | Li-Ion Battery Charger, 4.25 to 6.5Vin, 600mA $75.00 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