The MAX77813 is a high-efficiency step-up/step-down (buck-boost) converter targeted for single-cell Li+/Li-ion battery powered applications. The device maintains a regulated output voltage from 2.6V to 5.14V across an input voltage range of 2.3V to 5.5V. The device supports up to 2A of output current in boost mode and up to 3A in buck mode. The device seamlessly transitions between buck and boost modes. A unique control algorithm allows high-efficiency, outstanding load, and line transient response. Dedicated enable and power-OK pins allow simple hardware control. An I2C serial interface is optionally used for dynamic voltage scaling, system power optimization, and fault read-back. The device supports two inductor switching current limit options selected by the ILIM pin. The MAX77813 is available in a 20-bump, 2.13mm x 1.83mm wafer-level package (WLP). APPLICATIONS * Single-Cell Li-ion Powered Applications * Handheld Scanners, Mobile Payment Terminals, Security Cameras * AR/VR Headsets * VIN Range: 2.30V to 5.5V * VOUT Range: 2.60V to 5.14V (I2C Programmable in 20mV Step) * Up to 2A Output Current in Boost Mode (VIN = 3.0V, VOUT = 3.4V, ILIM = High) * Up to 3A Output Current in Buck Mode (ILIM = High) * Up to 97% Peak Efficiency * SKIP Mode for Optimal Light Load Efficiency * 55μA (Typ) Low Quiescent Current * 3.4MHz High Speed I2C Serial Interface * Inductor Switching Current Limit Selection Pin * Power-OK Output * 2.5MHz Switching Frequency * Protection Features * Soft-Start * Thermal Shutdown * Overvoltage Protection * Overcurrent Protection * 2.13mm x 1.83mm, 20-Bump WLP