The LTC4012IUF#PBF from Analog Devices is a multi-chemistry battery charger IC in the PowerPath™ series, designed to charge 1 to 4 series cells with a constant programmable current. It accepts a supply voltage up to 28V, making it suitable for industrial and automotive battery management systems where the input rail can vary widely. The part integrates over-voltage fault protection and operates across the full -40°C to 125°C temperature range, so it can sit in an engine bay or a factory-floor charger without derating concerns. The 20-QFN (4x4) package keeps the footprint small for space-constrained power stages.
Multi-chemistry charging: one BOM for multiple battery types
Because the LTC4012IUF#PBF supports multi-chemistry charging, a single board can handle Li-Ion, LiFePO4, NiMH, or lead-acid packs by changing the charge termination algorithm in the external controller. That saves a board spin when a customer switches battery chemistries mid-production. The constant programmable current lets you set the charge rate with a single resistor — no firmware dependency for the current limit.
Temperature grade and environment
Rated for -40°C to 125°C, this IC qualifies for under-hood automotive, outdoor telecom cabinets, and high-ambient industrial enclosures where forced cooling isn't available. The 20-QFN package with exposed pad helps pull heat into the PCB copper plane — make sure the thermal vias are sized for the charge current you plan to run.