INTERSIL
DC/DC Switching Buck-Boost Regulator, Adjustable, 1.8V-5.5V in, 1V-5.2V out, 2.1A, QFN-20
Buck-Boost Switching Regulator, Fixed, 1.8 V to 5.5 V in, 3.3 V/2.1 A out, WLCSP-9