Other Parts Discussed in Thread: TPS43060
Hey Guys,
I'm just looking at the LM3488 and the TPS4306x boost controller.
In TPS4306x datasheet, page 19, it says:
"The TPS4306x can also operate in a split-rail topology where a separate voltage is provided to bias the VIN pin of the IC to 4.5 V or greater. The power for the boost power stage can then be powered from a separate input lower than the 4.5-V minimum VIN voltage. When operating in this mode, the boost power stage voltage must be greater than 2.5 V to bias the ISNS pins or the current limit accuracy may degrade. If used in split rail, the TPS4306x is enabled and disabled in the same VIN and EN conditions as described in Typical Operation (VIN < VOUT)."
There is no mention of anything like that in the LM3488 datasheet.
I'm just wondering if this "Split-rail" operation can be achieved with the LM3488.
The application is for device powered by a single cell li-ion battery. So input voltage: 2.5 ~ 4.2V. Output voltage = 12V @ 1.5A
Cheers,
Blake