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Это м.б. интересно
The TPS211x family of power multiplexers enables seamless transition
between two power supplies, such as a battery and a wall adapter, each
operating at 2.8–5.5 V and delivering up to 1 A.
Key Features:
° Low Standby Current (0.5 uA Typ)
° Low Operating Current (55 uA Typ)
° Switch Status Output Option
° User-Programmable Current Limiting from 0.31-A to 1.25-A
° Thermal Protection
° Inrush Current Control
° Cross-Conduction and Reverse-Conduction Blocking
Download the TPS211x datasheet (pdf file)
http://focus.ti.com/docs/shared/workspace/campaign.jhtml?stk=5354775&cmp=1989&url=http://www-s.ti.com/sc/ds/tps2110.pdf
Learn more about the TPS211x family by clicking the link below.
http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TPS2110.
E-mail: info@telesys.ru