Part Number:BQ24250
We are working on the design for a solar powered outdoor wireless sensor node. We are using a BQ24250 to charge a Li-Ion battery. The micro (msp430), radio (cc1120) and the rest of the electronics will run a voltage less than 3.3V (to be decided - anywhere between 2.5V to 3.3V). The radio will operate at 433 MHz. Should we go for a switching regulator or an LDO to convert the BQ24250 SYS voltage output to the voltage range (2.5V to 3.3V) ? How do we ensure that the power supply noise has minimal effect on the radio and other sensors on board ? If switching noise will be an issue, we can live with the power wasted in the LDO otherwise we prefer a buck converter. Any suggestions on part numbers. Max current consumption will be less than 500 mA.