Since it is not possible to power the system load from the battery through the MAX1870A itself, a pMOSFET can be used in the configuration shown. When the wall adapter is powering the system load, the…

MAX1870A is able to achieve better than +/-1% accuracy with +/-1% resistors by reducing the adjustment range of the battery voltage and taking advantage of ratiometric scaling. The BATT voltage adjustment…

Answer: As shown in the "Absolute Maximum Ratings" top of page 2: Operating Temperature Range for MAX1870AETJ is -40°C to +85°C Continuous Power Dissipation (TA = +70°C) 32-Pin Thin QFN 5mm x 5mm (derate…