AN13528: This application note provides a hardware design guide for the internal DC-DC converter and the internal LDO regulator on LPC553x/LPC55S3x devices.
Using the DC-DC and LDO Features on the LPC553x/LPC55S3x Family
AN13528: This application note provides a hardware design guide for the internal DC-DC converter and the internal LDO regulator on LPC553x/LPC55S3x devices.