Normally it can't. The normal boost output feedback pin FBS is set to 0.5V, but the threshold is 0.56V if we want MAX38888 to charge to the SuperCAP.
So if the system conect 5V to the VSYS pin, and…
The MAX38888 is a storage capacitor or capacitor bank backup regulator designed to efficiently transfer power between a storage element and a system supply rail in reversible buck and boost operations…
Correction of MAX38888 datasheet (Rev. 2; 10/18) errors in calculations for super capacitor voltage configuration:
Page 9, under the section titled Super Capacitor Voltage Configuration , the…
Q: When use MAX38888, found the SuperCap can not be full charged, it is around 2.4V. Removing the charge voltage, it can not be discharged. Even charge the SuperCap to full directly, it still can not discharge…
They will not be able to boost back to 5V because MAX38888 will require the supply to be above VSYS max (5V) to start charging. The device requires VSYS to be 12% above the boost target to start charging…
