I'm trying to use the LT3048-5 to get a steady 5V output from a battery that outputs 4.2->3.0V
I connected together the following setup from the datasheet:
But what I'm getting when I input 4.2V is ~3.7V (Normally 0.5V less than the input for typical input voltages). The LDOOUT value and the BSTOUT have the same value with this input voltage, however, if I turn up the voltage to ~6V I actually get a regulated 5V output (~6V BSTOUT).
I'm confused, shouldn't I be seeing ~6.1V at the BSTOUT pin boosted from a proper input voltage and then a steady 5V at the LDOOUT pin?
And there's a part of the datasheet which seems strange to me (http://cds.linear.com/docs/en/datasheet/3048fa.pdf): under Electrical Characteristics, BSTOUT-VIN Regulation Voltage: there is a condition that LDOUT < VIN That seems contradictory to the idea of a boosting regulator to me