MAX77859

RECOMMENDED FOR NEW DESIGNS

2.5V to 22V Input, 7.8A Switching Current High-Efficiency Buck-Boost Converter for USB-PD/PPS Applications

Data Sheet (Rev. 1) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Part Details

Wide Input Voltage Range: 2.5V to 22V
Programmable Output Voltage
- 3.2V to 16V with Internal Feedback Resistors
- 3.0V to 20V with External Feedback Resistors, See Table 1
USB Type-C® Power Delivery (PD)/Programmable Power Supply (PPS)
- 20mV Output Voltage Step Size
- 50mA Output Current Limit Step Size
Maximum Output Current
- Buck Mode: Up to 6A
- Boost Mode: Up to 4A (V_IN = 3.7V, V_OUT = 5V)
7.8A Typical Switching Current
Automatic SKIP Mode and Forced-PWM Mode
R_SEL Configuration
- I²C Interface Target Address
- Switching Current Limit Threshold
- Internal/External Feedback Resistors

I²C Programming
- Output Voltage (DVS)
- Slew Rate of Output Voltage Change
- Output Current Limit Threshold
- Switching Current Limit Threshold
- Switching Frequency
- Forced-PWM Mode Operation (FPWM)
- Loop Compensation
- Power-OK (POK) and Fault Status/Interrupts
Output Active Discharge
Open-Drain Status/Interrupts Pin
Available in a 3.01mm x 2.78mm 42 Wafer-Level Packaging (WLP) or 4.0mm x 4.0mm 19 FC2QFN

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

MAX77859: 2.5V to 22V Input, 7.8A Switching Current High-Efficiency Buck-Boost Converter for USB-PD/PPS Applications Data Sheet (Rev.1) 06/13/2023

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
MAX77859AEWO+	42-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX77859AEWO+T	42-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

MAX77859 Evaluation Kit GUI Software, 1.0.0

Evaluation Kits

Evaluation Kit for MAX77859

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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, FPWM, 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 and Output Current Limit Dynamically Adjustable Through I²C Serial Interface
I²C Target Address, Switching Current Limit, and Feedback Configuration Adjustable Using R_SEL (R9)

Product Details

The MAX77859 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77859, a high-efficiency, high-performance buck-boost regulator with a peak switching current of 7.8A. It supports USB Type-C PPS requirements with programmable output voltage (20mV/step) and programmable output current limit (50mA/step). The IC is capable of 2.5V to 22V input and dynamically adjustable output (through I²C serial interface) between 3.2V to 16V (internal feedback) or between 3V to 20V (external feedback). The EV kit is factory-configured as internal feedback with a default startup output voltage of 5V. Other startup voltages can be achieved with external feedback resistors.

I/O pins are available to support the I²C serial interface, enable function, forced-PWM mode, and interrupt/power-OK indicator. The I²C target address, switching current limit, and feedback configuration can be adjusted by changing the R_SEL resistor (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 MAX77859 WLP IC (MAX77859AEWO+T is the default one installed).

Resources

MAX77859WEVKIT Gerber Files
1.2 M

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