2.7, 3.3V, Lithium-Ion Battery Charger for Portable

Application has been designed for a single Li-Ion battery input with 2.7V or 3.3V output that requires small size and low output ripple. The input voltage range is from 2.75 to 4.2V and is bucked down to a 2.7V or 3.3V output, depending on the state of the OVSI logic input: if High then 2.7Vout, if Low then 3.3Vout. The target application is for a voltage source to power White LEDs from either 2.7V or 3.3V