General Description
The MAX77847 is a highly efficient high-performance
buck-boost regulator with an industry-leading quiescent
current of 14μA targeted for battery-powered
applications. It supports an input voltage range from
1.8V to 5.5V and an output voltage range from 1.8V to
5.2V. The IC provides two programmable switching
current limits to optimize external component sizing
based on load requirements. Analog Devices’ unique
buck-boost controller technology provides high
efficiency, excellent load and line transient performance,
and a seamless mode transition across the input and
output range.
The device features a hardware configuration SEL pin
which configures the default output voltage and I2C
target address. A hardware dynamic voltage scaling
(DVS) pin allows the user to change the output voltage
between two output voltages without I2C interference.
The I2C interface is optional and allows users to adjust
the output voltage with 50mV steps.
The MAX77847 is available in a 2.18mm x 1.66mm
15-bump wafer-level package (WLP).

Benefits and Features
• Flexible System Integration
• 1.8V to 5.5V Input Voltage Range
• 1.8V to 5.2V (50mV steps) Output Voltage Range
• 4.5A/3.6A Switching Current Limit
• 14μA Ultra-Low IQ
• I2C Interface
• Programmable Output Voltage
• Programmable Output Slew Rate (DVS)
• Forced PWM Mode Operation (FPWM)
• Output Active Discharge
• I2C configurable GPI Pin
• External FPWM Enable Input
• DVS Control Input
• SEL Pin to Configure Device
• Default Start-Up Voltage (16 Options)
• I2C Target Address (2 Options)
• Soft-Start

Key Applications
• 5G PA Supply
• Battery Power Equipment
• Internet of Things (IoT) Devices
• System Power Pre-Regulation
• Smartphones ToF/Facial and Gesture Recognition