1 Features
• High-efficiency, 1.5-MHz, synchronous switchmode
buck charger
– 92% charge efficiency at 2-A from 5-V input
– Optimized for USB voltage input (5 V)
– Selectable low power pulse frequency
modulation (PFM) mode for light load
operations
• Supports USB On-The-Go (OTG)
– Boost converter with up to 1.2-A output
– 92% boost efficiency at 1-A output
– Accurate constant current (CC) limit
– Soft-start up to 500-μF capacitive load
– Output short circuit protection
– Low power PFM mode for light load operations
• Single input to support USB input and high voltage
adapters
– Support 3.9-V to 13.5-V input voltage range
with 22-V absolute maximum input voltage
rating
– Programmable input current limit (100 mA
to 3.2 A with 100-mA resolution) to support
USB 2.0, USB 3.0 standards and high voltage
adaptors (IINDPM)
– Maximum power tracking by input voltage limit
up to 5.4 V (VINDPM)
– VINDPM threshold automatically tracks battery
voltage
– Auto detect USB SDP, DCP and non-standard
adaptors
• High battery discharge efficiency with 19.5-mΩ
battery discharge MOSFET
• Narrow VDC (NVDC) power path management
– Instant-on works with no battery or deeply
discharged battery
– Ideal diode operation in battery supplement
mode
• BATFET control to support ship mode, wake up
and full system reset
• Flexible autonomous and I2C mode for optimal
system performance
• High integration includes all MOSFETs, current
sensing and loop compensation
• High accuracy
– ±0.5% charge voltage regulation
– ±5% at 1.5-A charge current regulation
• Safety and Regulatory Approval:
– IEC 62368-1 End Equipment Standard

2 Applications
• Smartphone
• Mobile phone accessory
• Medical equipment

3 Description
The BQ25601 is a highly-integrated 3-A switch-mode
battery charge management and system power path
management device for single cell Li-ion and Lipolymer
batteries. The low impedance power path
optimizes switch-mode operation efficiency, reduces
battery charging time, and extends battery life during
discharging phase. The I2C serial interface with
charging and system settings makes the device a truly
flexible solution.