The MAX77859 from Analog Devices is a high-efficiency, high-performance buck-boost converter targeted for systems requiring a wide input voltage range (2,5 to 22 V). The IC can supply up to 6 A of output current in buck mode and up to 4 A in boost mode (VIN = 3,7 V, VOUT = 5 V). The IC allows systems to change the output voltage dynamically through the integrated I2C serial interface.
The MAX77859A also features an I2C-adjustable output current limit with resolutions of 50 mA/step (with 10 mΩ sense resistance) to support USB-C PPS requirements. In contrast, the MAX77859B is a non-PPS version and is optimised for low quiescent current. Systems equipped with the MAX77859 can provide fast-charging peripheral devices with higher output voltage, minimising power loss across cable/connector and reducing charging time.
Applications include USB PD 3.0 (PPS) dynamically-reconfigurable processor applications and space-constrained designs.
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