Hi,
I'm designing a BLE based circuit based on CC2541 and I'm using the following reference design to maximize battery life using the following reference design:
ti.com/tool/cc2540tps62730em-rd
I'm using a CR2032 battery for the application and to prolong battery life it is a good idea to use a buffer cap (C2 in the reference design). I'm using this document to try and size the optimum cap value:
ti.com/lit/wp/swra349/swra349.pdf
However, there are two terms that I'm not clearly understanding. If you look at page 10 of the above document, it says about Vmin and Vmax. As far as my understanding goes, Vmin is the the lowest voltage at which the circuit can operate and does not depend on the battery( the lowest possible voltage till which the circuit will work fine). Vmax seems to be voltage at which the battery is assumed to be dead. Can someone take a look and clarify whether my understanding is right? Also from the datasheet of TPS62730, PAGE 13, "To achieve best performance and to extract most energy out of the battery, a good procedure is to design the select the buffer capacitor value for an voltage drop below 50 mVpp during DC-DC operation". Now if I'm to use the document from the above link, I don't see any way to fit in the 50mv Vpp in the equations provided.
