Two monolithic ideal diodes (see the figure)—both able to supply up to 2.6 A from 2.5- to 5.5-V input voltages—have been integrated into the LTC4413 power control. Housed in a 10-lead, 3- by 3-mm DFN package, this Linear Technology device suits low-loss diode OR-ing, automatic or microcontroller-controlled switchover from primary to auxiliary power, battery load sharing, and high-side power switching. It also can be used to charge multiple batteries from a single charger. During normal forward operation, the voltage drop across each diode is regulated to as little as 28 mV. Quiescent current is less than 40 A for diode currents up to 1 A. Thousand-piece pricing starts at $2.15 each.
Linear Technology Corp.