5.5V Input, 2A, High-Efficiency Buck-Boost Converter

The MAX77801 is a high-efficiency, step-up/step-down (buck-boost) converter targeted for single-cell, Li-ion battery-powered applications. The device maintains a regulated output voltage from 2.6V to 4.18V 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 and 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 MAX77801 is available in a 20-bump, 2.13mm x 1.83mm wafer-level package (WLP) and also 20-pin, 4mm x 4mm TQFN.

Applications

* AR/VR Headsets * Handheld Scanners, Mobile Payment Terminals, Security Cameras * Single-Cell, Li-Ion Battery-Powered Devices

* VIN Range: 2.30V to 5.5V

* VOUT Range: 2.60V to 4.18V (I2C Programmable in 12.5mV Steps)

* Up to 2A Output Current in Boost Mode (VIN= 3.0V, VOUT = 3.4V)

* Up to 3A Output Current in Buck Mode

* Up to 97% Peak Efficiency

* SKIP Mode for Optimal Light Load Efficiency

* 55µA (typ) Low Quiescent Current

* 3.4MHz High-Speed I2C Serial Interface

* Dynamic Voltage Scaling (DVS) Function

* 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

* 4mm x 4mm, 20-Pin TQFN