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2,071 pcs
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2071 pcs | On Request | 1 | On Request | On Request | 20+ | On Request | On Request |
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The LTC4040EUFD#TRPBF is a versatile 2.5A Battery Backup Power Manager IC designed by LT. It provides a complete system for managing power from a 3.5V to 5.5V supply rail, seamlessly switching to a single-cell Li-Ion or LiFePO4 battery during power loss.
Key features include an adjustable input current limit to protect the main supply and an integrated disconnect switch to isolate the external supply during backup mode. The device offers pin-selectable battery types and programmable charge voltages for both Li-Ion and LiFePO4 chemistries. An optional input overvoltage protection circuit can safeguard the device from high voltage transients.
This IC is suitable for applications requiring reliable backup power, such as fleet and asset tracking, automotive telematics, and security systems. It is available in a low-profile 24-lead 4mm x 5mm QFN package with a height of 0.75mm, designed for surface mounting.
The LTC4040 operates with constant frequency and prioritizes load current over charge current, ensuring system stability during power transitions. Its step-up DC/DC regulator efficiently delivers power from the battery to the system output when the input supply drops below a set threshold.
The input voltage range is 3.5V to 5.5V.
It can manage both Li-Ion and LiFePO4 batteries.
The charge voltage for Li-Ion batteries can be set up to 4.1V.
The charge voltage for LiFePO4 batteries can be set up to 3.6V.
The input current limit can be set to 2A.
The charge current setting is 1A.
The backup current capability is 2.5A.