The Future of Analog IC Technology
28V, 1A, Li-lon, Linear Battery Charger
with 10mA High Voltage LDO
The MP2631 is a linear, high performance
single cell Li-Ion or Li-Polymer battery charger
with 10mA LDO. By integrating high voltage
input protection into the charger IC, the
MP2631 can tolerate an input surge up to 28V.
The internal 5V LDO can be used as a system
watchdog supply to monitor charge status. The
LDO is ON when the input voltage is greater
than 3V and less than 7V, and remains ON
when the MP2631 is in SHDN mode. When
input is higher than 7.0V, the LDO output will be
cut off from the input. When input is lower than
5V, the LDO will work in the dropout region.
The device features constant current (CC) and
constant voltage (CV) charging modes with
programmable charge current (200mA to 1A),
auto-recharge and trickle charge. MP2631
provides ACOK and charge status indications to
the system. The OVP circuitry will automatically
disconnect both charger and LDO from input
when VIN exceeds 7V.
For guaranteed safe operation, the MP2631
limits the die temperature to a preset value
when the device is heated up due to limited
PCB space. MP2631 is available in 10-pin 3mm
x 3mm QFN package.
• Complete Solution for Charging Single-Cell
• Input Surge Protection Up to 28V
• 5V LDO output
• 3V to 7V Input Operating Range
• Programmable Charge Current: 200mA to 1A
• Termination and auto-recharge
• 0.75% VBATT Accuracy over Temperature
• <1µA Battery Reverse Current
• Automatic die temperature limiting
• Fault and Charge Status Indicators
• External Soft-Start to Control Inrush Current
• 3mm x 3mm QFN Package
• Cell Phones
• Digital Cameras
• Smart Phones
• MP3 Players
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Monolithic Power Systems, Inc.
TYPICAL APPLICATION CIRCUIT
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1.96K 3.09K 7.68K
1% 1% 1%
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