What this part is and where it fits
The MAX20094ATID/VY+ from Maxim Integrated is a single-cell Lithium Ion battery charger IC designed for automotive environments, qualified to AEC-Q100. It handles a single Li-Ion cell with a constant-current charging profile, delivering up to 1A charge current. The part communicates over I²C and SMBus for charge parameter configuration and status monitoring. Supply input accepts up to 36V, covering 12V and 24V vehicle electrical systems without external pre-regulation. The 28-TQFN (5x5) exposed-pad package with wettable flanks supports automated optical inspection in production.
Automotive temperature range and package
Rated for -40°C to 125°C ambient, this charger suits under-hood and cabin-mounted modules where thermal cycling is routine. The 28-TQFN package with exposed pad requires a thermal via pattern under the pad for heat sinking — the 1A charge current at high ambient will push junction temperature without a proper copper land. Wettable-flank terminals improve side-wetting inspection, a requirement in many automotive assembly lines.
Lifecycle and sourcing posture
It is ROHS3 compliant. No LTB window or successor has been issued.