MAX77857

RECOMMENDED FOR NEW DESIGNS

2.5V to 16V Input, 7A Switching Current High-Efficiency Buck-Boost Converter

Enable 20W USB PD Sourcing with 1/3 Solution Size

Data Sheet (Rev. 3)

Product Selection Table

Part Models: 10
1ku List Price: Starting From $1.02

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Part Details

Wide Input Voltage Range: 2.5V to 16V
Default Output Voltage
- 5V with Internal Feedback Resistors
- 3V to 15V with External Feedback Resistors
I²C-Programmable Output Voltage after Startup
- 4.5V to 15V with Internal Feedback Resistors
- 3.0V to 15V with External Feedback Resistors, See Table 1
Maximum Output Current
- Buck Mode: Up to 6A
- Boost Mode: Up to 4A (Boost Ratio ≤ 1.3)
7A Typical Switching Current
R_SEL Configuration
- I²C Interface Slave Address
- Switching Current Limit Threshold
- Internal/External Feedback Resistors
I²C Programming
- Output Voltage (DVS)
- Slew Rate of Output Voltage Change
- Switching Current Limit Threshold
- Switching Frequency
- Forced PWM Mode Operation (FPWM)
- Power-OK (POK) Status and Fault Interrupt Masks
Soft-Start
Output Active Discharge
Open-Drain Power-OK (POK) Monitor and Fault Condition Interrupt (MAX77857B/C Only)
Protection Features
- Undervoltage Lockout (UVLO)
- Overcurrent Protection (OCP)
- Overvoltage Protection (OVP)
- Thermal Shutdown (THS)
High Density Interconnect (HDI) PCB not Required (See the PCB Layout Guideline section)
Available in 2.83mm x 2.03mm 35 WLP or 31 WLP or 3.5mm x 3.5mm 16 FC2QFN

Part Models: 10
1ku List Price: Starting From $1.02

Documentation

Data Sheet 1

MAX77857: 2.5V to 16V Input, 7A Switching Current High-Efficiency Buck-Boost Converter Data Sheet (Rev.3) 03/25/2022
- Open Interactive Page

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX77857AEWQ+	31-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857AEWQ+T	31-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857BEFE+	16-LFCSP-3.5X3.5X0.55	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857BEFE+T	16-LFCSP-3.5X3.5X0.55	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857BEWB+	35-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857BEWB+T	35-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857CEFE+	16-LFCSP-3.5X3.5X0.55	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857CEFE+T	16-LFCSP-3.5X3.5X0.55	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857CEWB+	35-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77857CEWB+T	35-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

Software Development 1

MAX77857 GUI Software, 1.0.0

EE-Sim Power® Tools 1

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

Start EE-Sim Now

Evaluation Kits

MAX77857Q Evaluation Kit

Buy Now View Details

Features and Benefits

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)

Product Details

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).

Resources

MAX77857QEVKIT ODB Files - Design Files
1.06 M

Evaluation Kit for MAX77857 (WLP)

Buy Now View Details

Features and Benefits

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)

Product Details

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).

Resources

MAX77857WGEVKIT Gerber Files
1.16 M

Evaluation Kit for the MAX77857

Buy Now View Details

Features and Benefits

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)

Product Details

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

Resources

MAX77857WEVKIT ODB Files - Design Files
1.06 M

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MAX77857

Part Details

Documentation

Data Sheet 1

Video 1

Tools & Simulations

Software Development 1

EE-Sim Power® Tools 1

Evaluation Kits

Features and Benefits

Product Details

Resources

Features and Benefits

Product Details

Resources

Features and Benefits

Product Details

Resources

Latest Discussions

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