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

Smallest Solution Size to Achieve USB PD OTG Power

Product Details

Key Features

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 2.5
VIN (V) (max) 16
VOUT1 (V) (min) 3
VOUT1 (V) (max) 15
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method I2C
Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Alternate Topology Buck-Boost
Design Tools EE-Sim
Package/Pins WLP/35
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
0.9
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 2.5
VIN (V) (max) 16
VOUT1 (V) (min) 3
VOUT1 (V) (max) 15
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method I2C
Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Alternate Topology Buck-Boost
Design Tools generateDesignEESIMUrl('https://maxim.transim.com/pwm2/designreq/Index?partId=26775', '')
Package/Pins WLP/35
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
0.9

Key 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

Applications/Uses

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

Description

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).

Simplified Block Diagram

MAX77831: Functional Diagram MAX77831: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.