The S3REG300T28HPC is a regulator circuit which has been designed to provide 0.9V with a load current of up to 300 mA. The output voltage is programmable.
The S3REG300T28HPC features an automatic feedback sensing option to maintain a constant regulated output voltage level. It has been designed to provide a stable output in both low-drop and high-drop operation, while maintaining minimum ripple on supply lines in the presence of large load current
spikes inherent with switching loads, e.g. high-speed ADCs.