MAX77831
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MAX77831

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

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Smallest Solution Size to Achieve USB PD OTG Power

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $0.90
Features
  • Wide Input Voltage Range: 2.5V to 16V
  • Default Output Voltage
    • 5V with Internal Feedback Resistors
    • 3V to 15V with External Feedback Resistors
  • Default 1.8MHz Switching Frequency
    • 1.5MHz and 1.2MHz Selectable through the I2C Interface
  • Forced-PWM (FPWM) Mode Operation Only
  • I2C-Programmable Output Voltage After Startup
    • 4.5V to 15V (Internal Feedback Resistors)
    • 3V to 15V (External Feedback Resistors, see Table 2)
  • Maximum Output Current
    • Buck Mode: Up to 6A
    • Boost Mode: Up to 4A (Boost Ratio ≤ 1.3))
  • 7A Typical Switching Current
  • RSEL 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
    • Power-OK (POK) Status and Fault Interrupt Masks
    • Internal Compensation
  • Soft-Start
  • Output Active Discharge
  • Open-Drain Power-OK (POK) Monitor/Fault Condition Interrupt (MAX77831B/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 2.86mm x 2.06mm 35 WLP
Additional Details
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The MAX77831 is a high-efficiency, high-performance buck-boost converter targeted for systems requiring wide input voltage range (2.5V to 16V). It features a 7A switching current and can supply up to 6A output current in buck mode and up to 4A in boost mode (boost ratio ≤ 1.3).

The IC is available in 5V default output voltage when using internal feedback resistors. The IC can also be configured to any default output voltages between 3V and 15V when using external feedback resistors. The output voltage is adjustable dynamically through the I2C serial interface (see the Output Voltage Configuration section). The IC only operates in forced-PWM (FPWM) mode.

The SEL pin allows a single external resistor to program four different I2C interface slave addresses, four different switching-current limit thresholds, and selection between external/internal feedback resistors. The different switching-current limit thresholds allow the use of lower profile and smaller external components that are optimized for a particular application. The use of external feedback resistors allows for a wider output voltage range and customizable output voltages at startup.

The I2C serial interface is optional and allows dynamically controlling the output voltage, the slew rate of the output voltage change, switching-current limit threshold, and switching frequency. The I2C-programmed settings have priority over the RSEL decoded settings.

The MAX77831 is available in a 2.83mm x 2.03mm 35-bump wafer level package (WLP).

Applications

  • Non-Battery Powered Applications up to 16V Input
  • Battery Powered Applications up to 16V Input with EN Control
Part Models 2
1ku List Price Starting From $0.90

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX77831BEWB+
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MAX77831BEWB+T
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Product Lifecycle

PCN

Jun 23, 2022

- 2291

TEST

MAX77831BEWB+

PRODUCTION

MAX77831BEWB+T

PRODUCTION

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Part Models

Product Lifecycle

PCN

Jun 23, 2022

- 2291

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MAX77831BEWB+

PRODUCTION

MAX77831BEWB+T

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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MAX77831WEVKIT

Evaluation Kit for the MAX77831

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MAX77831WEVKIT

Evaluation Kit for the MAX77831

Evaluation Kit for the MAX77831

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, VIO, and the I2C Serial Interface SCL, SDA
  • MAXUSB_INTERFACE# Allows Easy Communication with a Windows PC
  • GUI Software that Drives the I2C Serial Interface for Optional Software Control
  • Startup Output Voltage Adjustable Through External Feedback Resistors
  • Output Voltage Dynamically Adjustable Through the I2C Serial Interface
  • I2C Slave Address, Switching Current Limit, and Feedback Configuration Adjustable Using RSEL (R9)

Product Detail

The MAX77831 evaluation kit (EV kit) provides a proven design to evaluate the MAX77831, a 7A switching current, high-performance buck-boost regulator that only operates in forced-PWM (FPWM) mode. 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 feed- back with the default startup output voltage at 5V. Other startup voltage can be achieved with external feedback resistors. Output voltage can be adjusted dynamically through the I2C serial interface.

The I/O pins are available to support the I2C serial inter- face, Enable function, and Interrupt/Power-OK indicator. The I2C slave address, switching current limit, and feed- back configuration can be adjusted by changing the RSEL resistor value (R9). The 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 the features of the IC. The IC installed on the EV kit is the MAX77831BEWB+T.

Applications

  • Battery Powered Applications up to 16V Input with EN Control
  • Non-Battery Powered Applications up to 16V Input
Tools & Simulations

Tools & Simulations 2

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