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any IC to convert 3.7v to 5v

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devil6600

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can anyone suggest me if this is possible that i can boost 3.7v to 5v?
in my application i need to power 18f4550 through battery (3.7V-4.2V) when the battery is partially discharged then voltage drops below 4.2V and this may lead to performance issue in 18f4550. i also wish to use usb while powering through battery.

thanks in advance
 

yes i agree, but usb will be available for a limited time.
 

If your battery providing 3.7V it can run the controller. because controller works fron 2 to 5.5V. check the link in previous post.
 

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