1A charge current, single-cell Li-Ion charger in a 2x2 mm TDFN
The MAX8808XETA+T from Analog Devices is a single-cell Lithium-Ion battery charger IC in a compact 8-TDFN-EP (2x2 mm) package. It delivers a programmable constant charge current up to 1A, with over-voltage fault protection to safeguard the cell during charging. The part operates across the full industrial temperature range of -40°C to 85°C, making it suitable for portable equipment, handheld instruments, and battery-powered IoT devices that need a reliable, space-efficient charging solution.
Active production, ROHS3 compliant — no obsolescence concern
It is also ROHS3 compliant, meeting the latest EU restriction-of-hazardous-substances directive. For a BOM line that needs a long-horizon supply, this part presents no near-term obsolescence risk.
What the 1A charge current and over-voltage protection mean for the design
The 1A maximum charge current is the key parameter for charge-time budgeting. With a typical 1000 mAh Li-Ion cell, a full constant-current charge at 1A takes roughly one hour before the constant-voltage phase begins. The over-voltage protection clamps the battery voltage at 4.2V, preventing over-charge and extending cycle life. The constant-current is programmable, so the designer can trade charge speed against thermal dissipation in the 2x2 mm package.
Package and mounting — surface-mount 8-TDFN with exposed pad
The part is supplied in an 8-WFDFN exposed-pad package (supplier device package 8-TDFN-EP, 2x2 mm) for surface-mount assembly. The exposed pad must be soldered to a thermal land on the PCB to dissipate heat from the 1A charge current.