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.