I have an application which requires me to operate the LMZ31707 using a split supply. I'm controlling the output of a single-cell Li-Ion battery (3.7V nominal), which is to be made variable between ~3.2V - 5.5V using the LMZ31707. Since the LMZ's minimum input voltage at VIN for operation is ~4.5V, I am required to power it with a separate supply.
My question pertains to the maximum current draw on the LMZ's VIN pin during normal operation. There are several convenient inductorless charge pump devices that would allow me to generate a 5V supply for the converter from the battery voltage, but these designs all have low maximum current output (60mA-100mA, typically). This strategy is preferable to a discrete boost converter because my application is highly spatially constrained. In order to know whether or not it will be possible for me to use an integrated inductorless charge pump, I will need to know the necessary supply current for the LMZ.
Any help will be greatly appreciated.
