When a PMIC is used with the MAX20361, both PMICs and the solar harvesting system (using MAX20361) are both individually able to charge the battery. Therefore, in this configuration MAX20361 can work with any PMIC. One of the disadvantages of this configuration is that when both the chargers are off (i.e. when the battery voltage is above the charge voltage) the solar harvested energy will be lost . Maxim has a new PMIC which is designed to work seamlessly with MAX20361. If we use MAX20360 PMIC with MAX20361 then the PMIC will make the solar harvested energy available to the system (when the chargers are off) and thus will produce a more efficient and seamless system design