LTC4121IUD in Linear Tech / ADI LT Series Family
The LTC4121IUD is a high-performance synchronous step-down battery charger family from Analog Devices (formerly Linear Technology), engineered for 40V operation and 400mA output. These integrated circuits feature a wide input voltage range of 4.4V to 40V, making them suitable for charging Li-Ion, Li-FePO4, and Lead-Acid batteries from high-voltage sources. The family integrates a maximum power point tracking mechanism, ensuring efficient energy harvesting from high-impedance supplies like solar panels or inductive power transfer systems.
Variants in This Sub-Family
Variants within the LTC4121 sub-family typically differ in their internal voltage regulation targets and packaging options. The LTC4121-4.2 variant provides a fixed 4.2V float voltage for standard Li-Ion cells, whereas the base LTC4121IUD utilizes an adjustable feedback pin for variable battery chemistries. Lead-free (PBF) and tape-and-reel (TR) designations denote environmental compliance and manufacturing delivery formats, while temperature grades specify commercial or industrial operation ranges.
