The ADP2125BCDZ-1.26R7 from Analog Devices Inc. is a buck switching regulator Integrated Circuit with a positive fixed 1.26 V output, 1 output at 500 mA, supplied as a die.
The ADP2125ACDZ-1.26R7 from Analog Devices Inc. is a buck switching regulator Integrated Circuit with a positive fixed 1.26 V, 1-output 500 mA rating, supplied as die.