MAX77860 USB Type-C™ Switch-Mode Buck Charger

Analog Devices' MAX77860 is a high-performance single input switch-mode charger that features USB Type-C CC detection capability, reverse-boost capability, and a safeout LDO.

The switched-mode battery charger features two integrated switches and provides small inductor and capacitor sizes, programmable battery-charging current, and is ideal for portable devices such as smartphones, IoT devices, and other Li-Ion battery-powered electronics. The charger features a single input that works for USB and high-voltage adapters. The device supports USB Type-C CC detection under the BC 1.2 specification and the power path switch is integrated into the chip.

The MAX77860 blocks connected to the adapter/USB pin are protected from input overvoltage events up to 14 V. The USB-OTG output provides true-load disconnect and is protected by an adjustable output current limit. It has an input current limit up to 4.0 A and can charge a single-cell battery up to 3.15 A. The IC requires no additional inductors to power USB-OTG accessories when configured in reverse-boost mode. The switching charger is designed with a special CC, CV, and die temperature regulation algorithm, as well as I²C programmable settings to accommodate a wide range of battery sizes and system loads. The on-chip ADC helps monitor the charging input voltage/current, battery voltage, charging/discharging current, and the battery temperature.

The MAX77860 communicates through an I²C 3.0 compatible serial interface consisting of a bidirectional serial data line (SDA) and a serial clock line (SCL). The IC is available in a 3.9 mm x 4.0 mm, 81-bump (9 x 9 array), 0.4 mm pitch, wafer-level package (WLP).