Other Parts Discussed in Thread: OPA2990
The BQ24297 data sheet states that the VREGN LDO output is 4.8 V (typical) when VBUS is 5V (Section 8.5 Electrocal Characteristics, subsection REGN LDO). But on the very next line, REGN LDO current limit, the "test conditions" are stated as "VBUS = 5V, VREGN = 3.8V". Is it a typo? Or does VREGN vary according to parameters such as output current?
What range do I have to expect from VREGN? I have an NTC connected to it in a voltage divider configuration (see Figure 17 in the data sheet), and I also need to read the NTC value (I have it connected to an ADC through a unity gain opamp), so I need to know if I can assume VREGN to be constant.
Finally, can I use VREGN to power up the opamp (OPA2990)?
Thanks in advance.