The AU8310 is a high-current, buck-boost switching converter for systems using new battery chemistries. It maintains voltage regulation while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage.

The AU8310 is capable of delivering at least 2.5 A continuous output current (VOUT = 3.3 V) across a battery voltage range of 2.5 V to 4.5 V. This maximizes the energy utilization of advanced, single-cell Li-ion battery chemistries that have significant capacity left at voltages below the system voltage.

The AU8310 supports a broader set of programmable features that can be accessed using an I2C interface. With a programmable output voltage range of 1.8 V to 5.2 V, the AU8310 is ideal for applications which require dynamically changing supply voltages. A programmable slew rate can be selected to provide smooth transitions between different output voltage settings.

The AU8310 is available in a 15 bump, 0.4 mm pitch WLCSP (1.38 mm × 2.28 mm) with a 2.5 MHz switching frequency, which further reduces the size of external components.

• Automatic and Seamless Transition Between Buck, Buck-Boost and Boost operation

• Maintains Steady Output Voltage at Wide Input Voltage Range from 2.3 V to 5.5 V

• Output Current:

    -2.5 A for VIN ≥ 2.5 V, VOUT = 3.3 V

    -2.5 A for VIN ≥ 2.8 V, VOUT = 3.5 V

    -3 A 2% duty pulse current (T = 60 s) for VIN = 3.6 V, VOUT = 4.7 V

• 2.5 MHz Typical Switching Frequency

• Integrated Soft Start

• I2C interface (Up to 1 MHz)

• Small 1.38 mm × 2.28 mm, 15-Pin, WLCSP

• System Pre-Regulator (Smartphone, Tablet, EFT Terminal, Telematics)

• Point-of-Load Regulation (Wired Sensor, Port/Cable Adapter and Dongle)

• Fingerprint, Face-ID, Camera Sensors (Smartphone, Electronic Smart Lock, IP Network Camera)

• RF Amplifier Supply (Smart Sensors)

• Thermoelectric Device (TEC/TEM) Supply (Datacom, Optical Modules, Cooling/Heating)