Datasheet Maxim MAX1811ESA+

Click here for production status of specific part numbers. MAX1811 USB-Powered Li+ Charger General Description The MAX1811 is a single-cell lithium-ion (Li+) battery
charger that can be powered directly from a USB port* or
from an external supply up to 6.5V. It has a 0.5% overall
battery regulation voltage accuracy to allow maximum
utilization of the battery capacity.
The charger uses an internal FET to deliver up to 500mA
charging current to the battery. The device can be
configured for either a 4.1V or 4.2V battery, using the
SELV input. The SELI input sets the charge current to
either 100mA or 500mA. An open-drain output (CHG)
indicates charge status.
The MAX1811 has preconditioning that soft-starts a
near-dead battery cell before charging. Other safety
features include continuous monitoring of voltage and
current and initial checking for fault conditions before
charging. Features ●● Charges Single-Cell Li+ Batteries Directly from
USB Port
●● 0.5% Overall Charging Accuracy
●● Minimal External Components
●● Input Diode Not Required
●● Automatic IC Thermal Regulation
●● Preconditions Near-Depleted Cells
●● Convenient Power SO-8 Package (1.4W) Ordering Information …