BQ25606RGER  is a highly-integrated standalone 3.0-A switch-mode battery charge management and system power path management device for single cell Li-ion and Li-polymer batteries. The solution is highly integrated with input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between system and battery. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time, and extends battery life during discharging phase.

BQ25606RGER  features fast charging with high input voltage support for a wide range of standalone chargers and portable devices. Its input voltage and current regulation deliver maximum charging power to the battery. It also integrates a bootstrap diode for the high-side gate drive for simplified system design.

The device supports a wide range of input sources, including standard USB host port, USB charging port, and USB compliant high voltage adapter. The device sets the default input current limit based on the built-in USB interface. The device is compliant with the USB 2.0 and USB 3.0 power specs with input current and voltage regulation. When the built-in USB interface identifies the input adaptor is unknown, the input current limit of the device is determined by the ILIM pin setting resistor value. The device also meets the USB On-the-Go (OTG) operation power rating specification by supplying 5.15 V on VBUS with a constant current limit up to 1.2 A.

The power path management regulates the system slightly above battery voltage but does not drop below the 3.5-V minimum system voltage. With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This Supplement mode prevents overloading the input source.

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)

• 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

• 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

– Maximum power tracking by input voltage limit

up to 4.6 V (VINDPM)

– VINDPM threshold automatically tracks battery

voltage

– Auto detect USB SDP, DCP and non-standard adaptors