DESCRIPTION
The MP2667 is a highly integrated, single-cell,
Li-ion/Li-polymer battery charger with system
power path management for space-limited
portable applications. The MP2667 takes input
power from either an AC adapter or a USB port
to supply the system load and charge the
battery simultaneously. The charger function
features constant current pre-charge, constant
current fast charge (CC) and constant voltage
(CV) regulation, charge termination, and autorecharge.
The power path management function ensures
continuous power to the system by
automatically selecting the input, battery, or
both to power the system. This power stage
features a low-dropout regulator from the input
to the system and a 100mΩ switch from the
battery to the system. Power path management
separates the charging current from the system
load, which allows for proper charge termination
and keeps the battery in full-charge mode.
The MP2667 provides a system short-circuit
protection (SCP) function by limiting the current
from the input to the system and the battery to
the system. This feature is especially critical for
preventing the Li-ion battery from being
damaged due to excessively high currents. An
on-chip battery under-voltage lockout (UVLO)
cuts off the path between the battery and the
system if the battery voltage drops below the
programmable battery UVLO threshold. This
prevents the Li-ion battery from being overdischarged. An integrated I2C control interface
allows the MP2667 to program the charging
parameters, such as the input current limit,
input minimum voltage regulation, charging
current, battery regulation voltage, safety timer,
and battery UVLO.
The MP2667 is available in a 10-pin QFN
(2mmx2mm) package.

FEATURES
 Compatible with 5V USB Power Sources
 Fully Autonomous Charger for Single-Cell
Li-Ion/Li-Polymer Batteries
 Complete Power Path Management for
Simultaneously Powering the System and
Charging the Battery
 Programmable Input Current Limit and
Minimum Input Voltage Regulation
Thresholds
 ±0.5% Charging Voltage Accuracy
 13V Maximum Voltage for the Input Source
 I
2C Interface for Programming Charging
Parameters and Status Reporting
 Fully Integrated Power Switches and No
External Blocking Diode Required
 Built-In Robust Charging Protection
Including Battery Temperature Monitoring
and Programmable Timer
 Built-In Battery Disconnection Function for
Shipping Mode
 Thermal Limiting Regulation on the Chip
 Available in an Ultra-Compact QFN-10
(2mmx2mm) Package

APPLICATIONS
 Wearable Devices
 Smart Handheld Devices
 Fitness Accessories
 Smartwatches
 Bluetooth Headphones