The Future of Analog IC Technology
2A,24V Input, 600kHz
2/3-Cell Switching Li-ion Battery Charger
The MP26123 is a monolithic DC-DC step-
down switching charger for 2- or 3-cell Li-ion
battery packs. It has an integrated high-side
power MOSFET can output up to a 2A charge
current. It also has peak-current–mode control
for fast loop response and easy compensation.
The MP26123 uses a sense resistor to control a
programmable charge current, and accurately
regulates the charge current and charge
voltage using two control loops.
The MP26123 has multiple fault condition
protections that include cycle-by-cycle current
limiting and thermal shutdown. Other safety
features include battery temperature monitoring
and protection, charge status indication and
programmable timer to cease the charging
cycle when timer out.
The MP26123 requires a minimal number of
readily-available external components.
The MP26123 is available in a 4mm x 4mm 16-
pin QFN package.
Charges 2- or 3-Cell Li-Ion Battery Packs
Wide Operating Input Range
Programmable Charging Current of up to 2A
±0.75% VBATT Accuracy
0.2Ω Integrated Power MOSFET
Up to 90% Efficiency
Fixed 600kHz Frequency
Preconditioning for Fully Depleted Batteries
Charging Status Indicator
Input Supply Fault Indicator
Cycle-by-Cycle Over-Current Protection
Battery Temperature Monitor and Protection
Mobile Internet Device
Portable Media Player
Charger for 2- or 3-Cell Li-Ion Batteries
Distributed Power Systems
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
MP26123 Rev. 1.01
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.