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LTC4040EUFD#PBF

LTC4040EUFD#PBF

Analog Devices
Battery Management 2.5A Bat Backup Pwr Manager
NRND7,523 in stock
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Overview

The LTC4040 is a complete lithium-ion/LiFePO4 battery backup management system designed for 3.5V to 5V supply rails. It functions as a high-current step-down battery charger while the main power is present and transitions to a high-current step-up DC/DC converter to provide a regulated output from the battery during a power failure.

Why Choose This Part

The device features an adjustable input current limit and a power-path controller that prioritizes the system load over battery charging. Its high-current 2.5A backup capability allows it to support demanding loads while maintaining high efficiency through synchronous rectification.

Applications

Ride-Through Supplies
Provides essential power during brief interruptions or brownouts to prevent system resets.
Power Loss Alarm Systems
Ensures enough run-time for the system to send an alert or log critical data to non-volatile memory after main power is lost.
Industrial Handhelds
Manages charging and backup power for portable terminals and scanners requiring reliable 5V rails.
Asset Tracking
Maintains GPS and cellular connectivity in the event of external power removal or tampering.

Getting Started

Engineers can evaluate the performance of this part using the DC2323A demonstration circuit. When designing the PCB, ensure short, wide traces for the power path to handle the 2.5A currents and place the input and output capacitors as close as possible to the IC pins to minimize switching noise.

Part of Linear Tech / ADI LT Series family » LTC4040EUFD

LTC4040EUFD Family

Part NumberDifferenceStock
LTC4040EUFD#TRPBF TRPBF 2,078