MAX77857

• Proven PCB Reference Design and Layout Benefit
• Fully Assembled and Tested
• Sense Points for High-Accuracy Measurements
• Accessible Test Point Pins for EN, POKB/INTB, V_IO, and I²C Serial Interface SCL, SDA
• MAXUSB_INTERFACE# Allows Easy Communication with a Windows PC
• GUI Software that Drives I²C Serial Interface for Optional Software Control
• Startup Output Voltage Adjustable Through External Feedback Resistors
• Output Voltage Dynamically Adjustable Through I²C Serial Interface
• I²C Slave Address, Switching Current Limit, and Feedback Configuration Adjustable Using R_SEL (R9)

The MAX77857 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77857, a high-efficiency, high-performance buck-boost regulator with a switching current of 7A. The IC is capable of 2.5V to 16V input and dynamically adjustable output between 4.5V to 15V when using internal feedback resistors, or between 3V to 15V when using external feedback resistors. The EV kit is factory-configured as internal feedback with default startup output voltage at 5V. Other startup voltages can be achieved with external feedback resistors. The output voltage can be adjusted dynamically through the I²C serial interface.

I/O pins are available to support the I²C serial interface, Enable function, and interrupt/Power-OK indicator. The I²C slave address, switching current limit, and feedback configuration can be adjusted by changing the R_SEL resistor value (R9). MAXUSB_INTERFACE# allows the use of Windows^®-based software with a friendly graphical user interface (GUI) as well as a detailed register-based interface to exercise all features of the IC. The EV kit is compatible with any version of the MAX77857 WLP IC (MAX77857BEWB+T is the default installed on the EV kit).

Applications

• USB Power Delivery (USB-PD) OTG
• Qualcomm^® Quick Charge^TM
• USB V_BUS Supply and DRP (Dual Role Power) Ports
• DSLR, DSLR Lens
• Display Power
• Up to 3-Cell Li-Ion Battery Applications
• Notebook Computer, Tablet PC

• Proven PCB Reference Design and Layout Benefit
• Fully Assembled and Tested
• Sense Points for High-Accuracy Measurements
• Accessible Test Point Pins for EN, POKB/INTB, V_IO, and I²C Serial Interface SCL, SDA
• MAXUSB_INTERFACE# Allows Easy Communication with a Windows PC
• GUI Software that Drives I²C Serial Interface for Optional Software Control
• Startup Output Voltage Adjustable Through External Feedback Resistors
• Output Voltage Dynamically Adjustable Through I²C Serial Interface
• I²C Slave Address, Switching Current Limit, and Feedback Configuration Adjustable Using R_SEL (R9)

The MAX77857Q evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77857 in a FC2QFN package, a high-efficiency, high-performance buck-boost regulator with a switching current of 7A. The IC is capable of 2.5V to 16V input and dynamically adjustable output between 4.5V to 15V when using internal feedback resistors, or between 3V to 15V when using external feedback resistors. The EV kit is factory-configured as internal feedback with default startup output voltage at 5V. Other startup voltages can be achieved with external feedback resistors. The output voltage can be adjusted dynamically through the I²C serial interface.

I/O pins are available to support the I²C serial interface, Enable function, and interrupt/Power-OK indicator. The I²C slave address, switching current limit, and feedback configuration can be adjusted by changing the R_SEL resistor value (R9). MAXUSB_INTERFACE# allows the use of Windows^®-based software with a friendly graphical user interface (GUI) as well as a detailed register-based interface to exercise all features of the IC. The EV kit is compatible with any version of the MAX77857 FC2QFN IC (MAX77857BEFE+T is the default installed on the EV kit).

• Proven PCB Reference Design and Layout Benefit
• Fully Assembled and Tested
• Sense Points for High-Accuracy Measurements
• Accessible Test Point Pins for EN, POKB/INTB, V_IO, and I²C Serial Interface SCL, SDA
• Web-Based GUI that Drives I²C Serial Interface for Optional Software Control
• Startup Output Voltage Adjustable Through External Feedback Resistors
• Output Voltage Dynamically Adjustable Through I²C Serial Interface
• I²C Slave Address, Switching Current Limit, and Feedback Configuration Adjustable Using R_SEL (R9)

The MAX77857 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77857, a high-efficiency, high-performance buck-boost regulator with a switching current of 7A. The IC is capable of 2.5V to 16V input and dynamically adjustable output between 4.5V to 15V when using internal feedback resistors, or between 3V to 15V when using external feedback resistors. The EV kit is factory-configured as internal feedback with a default startup output voltage at 5V. Other startup voltages can be achieved with external feedback resistors. The output voltage can be adjusted dynamically through the I²C serial interface.

I/O pins are available to support the I²C serial interface, enable function, and interrupt/Power-OK indicator. The I²C slave address, switching current limit, and feedback configuration can be adjusted by changing the R_SEL resistor value (R9). An onboard MAX32625PICO allows the use of a web-based friendly graphical-user interface (GUI) as well as a detailed register-based interface to exercise all features of the IC. The EV kit is compatible with any version of the MAX77857 WLP IC (MAX77857BEWB+T is the default installed on the EV kit).

• Fully integrated single-board solution for portable power and battery management
• USB-C Power Delivery (PD) input for flexible and modern power sourcing
• Single-cell (1S) Li-ion battery charger with optimized charge management
• Advanced fuel gauging, protection, and authentication for battery safety and reliability
• Multiple configurable output rails (up to 5) supporting diverse system loads
• Buck-boost and multi-phase buck regulation for efficient power conversion
• Supercapacitor-based backup power to maintain operation during power loss or battery swap
• Integrated power path management for seamless source switching
• Logic-level translation support for multi-voltage system compatibility
• Compact and scalable design suitable for space-constrained portable devices
• With MAXUSB_INTERFACE# for easy communication with a Windows PC

The ADPS40099-RD is a fully integrated battery management system reference design suitable for portable applications. It consolidates a complete power solution for handheld and portable devices, utilizing the latest components from ADI’s power portfolio.

The solution features the MAX77958 USB-C power delivery controller for flexible input options, paired with the MAX77786 1S battery charger to manage charging from a single-cell lithium-ion battery. The MAX17300 provides advanced fuel gauging, battery protection, and authentication capabilities, ensuring safe and reliable operation.

To support diverse power requirements, the design includes the MAX77857 buck-boost regulator and the MAX77542 multi-phase buck converter, enabling up to five individually configurable outputs. The design also integrates the MAX14727 for power path control. For backup power, the MAX38889 utilizes supercapacitor technology to maintain system operation during power interruptions and battery replacements. Additionally, the MAX14611 logic-level translator ensures seamless communication between components operating at different voltage levels.

This compact and cohesive single-board implementation offers a clear advantage in delivering a robust, space-efficient, and scalable battery management solution, ideal for modern portable electronic systems.