The MP5461GC-P from Monolithic Power Systems Inc. is a buck-boost switching regulator with a positive fixed 3.3 V output, 1 output rated 500 mA, in a 12-UFBGA, CSPBGA package.
The MP5461GC-Z from Monolithic Power Systems Inc. is a dual-input, 4-switch integrated buck-boost switching regulator Integrated Circuit with a positive fixed 3.3 V output, 1 output at 500 mA, in a 12-UFBGA, CSPBGA package.