TPS65216: Please recommend a PMIC for RTL8197FS processor.

Yue, 

Please help me make sure I understand your needs correctly: the system requires 2x DC-DC converters that both generate 3.3V at up to 500mA load? Can you use 1x DC-DC converter to generate 3.3V at up to 1A load?

And you need both a DC-DC converter and an LDO that generate 1.12V at up to 500mA load? 

Are the numbers in your list the order of the power-on sequence?

My recommendation if you want to use the TPS65216 would be to consider the following settings for each rail:

• DCDC1 = 1.12V, up to 1.8A load, typically used for the Core voltage
• DCDC2 = 1.12V, up to 1.8A load, typically used for the MPU voltage
• DCDC3 = 1.8V, up to 1.8A load, typically used for DDR memory (default = 1.8V when DC34_SEL pin has RSEL=31.6kOhms resistor to GND) 
• DCDC4 = 3.3V, up to 1.6A, typically used for Analog and I/O
• LDO1 = 3.3V, up to 400mA, typically used for low-noise Analog and auxiliary I/O

The default voltage for DCDC1/2 is 1.1V, and this can be changed to 1.12V by modifying the DCDCx[5..0] bits in the 0x16 and 0x17 registers to 0x1B for 1.12V

DCDC3 will generate 1.8V automatically when RSEL=31.6kOhms from DC34_SEL pin to GND is used, and DCDC4 generates 3.3V also.

LDO1 will generate 1.8V by default, and this can be changed to 1.8V by modifying the LDO1[5..0] bits in the 0x1B register to 0x3D for 3.3V

The automatic sequencing is set by the SEQ1-7 registers, and these can also be modified as needed.

In order to make these changes permanent, the EEPROM of TPS65216 samples will need to re-programmed for prototyping. Let us know if this solution sounds like it will work, and we can help you coordinate the re-programming of the device for prototyping and production.