50 mA/500 mA, Ultralow Power Step-Down Regulator with Battery Voltage Monitor
Quad, 1 A, 5.5 V, Synchronous Step-Down Regulators with One RF LDO Regulator

ANALOG DEVICES ADP5589CP-EVALZ Evaluation Board, ADP5589, LFCSP, 16-element FIFO for Event Recording, GPIO Functions