Clocking (and synchronising) three parallel BOOST Converters 120 degrees apart

Stephan,

As far as I know, there's no monolithic IC from TI which performs this function. Most of our clock generator ICs are for clocking data converters or processors, and are designed for 3.3V rails; it would be difficult to repurpose one for three-phase clock generation without level-shifting. Moreover, they all require programming over a SPI or I2C interface, which might be beyond the scope of your application.

I have three suggestions for you:

1. Consider asking the question to the power management forums as well - it might be possible to provide the analog ports of a multiphase converter or controller such that it operates as though it were a three-phase clock generator. I also know that some TI controllers have the ability to coordinate power phases without some orchestrating clock generator IC, so that may be of interest to you.
2. If you need something inexpensive, and can provide a clock at 6x the converter operating frequency, it's trivial to make your own interleaved controller from a triple D flip-flop like SN74HC175:
   
   If you have space for a 2-input AND gate, and your application allows 33% duty cycle, you only need a clock at 3x output frequency:
   
   
3. If you have a microcontroller available in the system, you could likely generate the required three-phase clock from that, instead of using a dedicated IC.

Regards,