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90 pcs
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90 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The LTC4040EUFD#TRPBF from Analog Devices is a versatile Battery Backup Power Manager IC designed for 3.5V to 5.5V supply rails. This device integrates a high-current step-up DC/DC regulator that can back up the system supply from a single-cell Li-Ion or LiFePO4 battery. When external power is available, the regulator functions in reverse as a step-down battery charger.
Key features include an adjustable input current limit to protect the main supply from overload and an input disconnect switch that isolates the external supply during backup mode. The LTC4040 provides automatic seamless switch-over to backup mode upon input power loss, indicated by an input power loss indicator. It supports pin-selectable battery types, including Li-Ion and LiFePO4, with programmable charge voltages for different backup applications. Optional input overvoltage protection (OVP) circuitry safeguards the device from high voltage damage.
This IC is available in a low-profile 24-lead 4mm x 5mm QFN package, suitable for surface mount applications. The operating temperature range is -40°C to 125°C (TJ). Applications include fleet and asset tracking, automotive telematics, toll collection systems, security systems, and USB-powered devices.
Specifications include a 3.5V to 5.5V input voltage range, with transient tolerance up to 7V. It supports backup currents of up to 2.5A and switch currents up to 6.5A. The battery charge voltage can be set between 3.45V to 3.6V for LiFePO4 or 3.95V to 4.1V for Li-Ion batteries. The input current limit can be set, for example, to 2A, and the charge current to 1A.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.75 | $0.75 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The input voltage range is 3.2V to 5.5V (steady state), with transient tolerance up to 7V for <1ms, duty cycle <1%.
It is available in a 24-WFQFN exposed pad package (24-QFN 4x5) for surface mount mounting.
The operating junction temperature range is -40°C to 125°C.
The charge current setting is 1A.
The input current limit setting is 2A.
For Li-Ion batteries, the charge voltage is 3.95V to 4.1V. For LiFePO4, it is 3.45V to 3.6V.
Yes, it includes optional input overvoltage protection that protects the device to >60V.