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10V Input, Quad-Phase Configurable, 3A/Phase, High-Efficiency Buck Converter

Extend Battery Life and Save Space with Configurable Quad-Phase Buck Converter Operating from a 1s/2s Li+ Battery

Product Details

The MAX77511/MAX77711 are four-phase, 3A/phase, configurable single to quad output, step-down buck regulators for 1s/2s Li+ battery inputs. Output voltage is programmable through an I2C interface between 0.25V and 5.2V. The buck has four combinable 3A switching phases (Φ) for up to four regulated outputs. Phases are configurable to higher-current multiphase outputs: 4Φ, (3+1)Φ, (2+2)Φ, (2+1+1)Φ, or (1+1+1+1)Φ.

Six GPIOs can be purposed for I/O expansion or buck status and control. Pseudo-random spread-spectrum modulation suppresses EMI. Soft-start, soft-stop, and DVS slew times are programmable with I2C. MAX77711 offers a 300mA linear regulator.

MAX77511/MAX77711 are available in a 64-bump, 3.54mm x 3.54mm wafer-level package (WLP).

Key Features

  • 3A/Phase Configurable Buck Regulator
    • 3A, 6A, 9A, or 12A Output Current Capability
  • 2.3V to 10V Input Voltage Range
  • 0.25V to 5.2V Output Voltage Range
    • 0.25V to 1.3V (5mV steps) in Low-Range 
    • 1V to 5.2V (20mV steps) in High-Range 
  • Pin Programmable Output/Phase (Φ) Configuration
    • 4Φ, (3+1)Φ, (2+2)Φ, (2+1+1)Φ, (1+1+1+1)Φ
  • High-Efficiency and Low-Heat 
  • Uses Small 2520 Inductor 
  • 1MHz Nominal Switching Frequency per Phase
    • Pseudo-Random ​Spread-Spectrum Options
  • Six Multi-Function GPIOs for Hardware Buck Control
    • Enable, DVS, FPWM, and Power-OK
  • 300mA pMOS LDO (MAX77711 Only)
  • Built-In Flexible Power Sequencing with Soft-Start/Stop
  • Protection Features
    • Hard and Soft-Short Protection, UVLO, and Thermal Protection

Applications/Uses

  • DSLR, Mirrorless, HD Video, and Action Cameras
  • 2-Cell Li+/Li-ion Equipment
  • Notebook Computers and Robots
  • Embedded Microprocessors, FPGAs, or ASICs
Parametric specs for Step-Down (Buck) Switching Regulators
VIN (V) (min) 2.3
VIN (V) (max) 10
VOUT1 (V) (min) 0.25
VOUT1 (V) (max) 5.2
IOUT1 (A) (max) 3
Switch Type Internal
Output Adjust. Method Preset or Adj
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 0.6
# DC-DC Outputs 4
Switching Frequency (kHz) 1000
Package/Pins WLP/64
Budgetary
Price (See Notes)
$2.14 @1k
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Simplified Block Diagram

MAX77511, MAX77711: Simplified Block Diagram MAX77511, MAX77711: Simplified Block Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX77511/MAX77711 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates either the MAX77511 or MAX77711 powermanagement integrated circuit (IC).

The EV kit is a step-down voltage regulator circuit using the IC that allows for easy evaluation of each feature. The circuit is capable of 2.3V to 10V input, 3A/phase continuous load, and output voltage adjustable between 0.25V and 5.2V. The EV kit evaluates either MAX77511 or MAX77711. Both ICs are the same except MAX77711 includes a 300mA LDO.

The EV kit supports evaluation of each converter phase (Φ) configuration:

  • 4Φ (single 12A output)
  • 3Φ + 1Φ (9A output + 3A output)
  • 2Φ + 2Φ (6A output + 6A output)
  • 2Φ + 1Φ + 1Φ (6A output + 3A output + 3A output)
  • 1Φ + 1Φ + 1Φ + 1Φ (four 3A outputs)

Three on-board transient loads allow users to exercise the full capability of the buck regulator or LDO. Windowsbased software provides a friendly graphical user interface (GUI) as well as a detailed register-based interface to exercise all the features of the IC.

View Details

Features

  • Proven PCB Reference Design and Layout
  • Fully Assembled and Tested
  • Easy Evaluation of All Phase Configurations
    • 0Ω Resistors Quickly Create Multiphase Configurations
    • Jumpers and Test Points for ENSEQ, GPIOs, nRSTIO, and PHCFG
    • GUI Drives I2C Interface for Optional Software Control
  • Inputs Separatable with 0Ω Resistors for Prototyping
  • USB to I2C Converter Allows Easy Communication with Windows PC
    • Windows Software GUI Controls Registers
    • Level Translator (MAX3395) Allows for Adjusting I2C Bus Voltage from 1.8V to 3.3V
  • On-Board Transient Load Emulates System Loading
    • Covers Full 12A Load Range (with 4Φ Configuration)
    • Control Using an External Function Generator

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    Support & Training

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    Parameters

    Key Features

    • 3A/Phase Configurable Buck Regulator
      • 3A, 6A, 9A, or 12A Output Current Capability
    • 2.3V to 10V Input Voltage Range
    • 0.25V to 5.2V Output Voltage Range
      • 0.25V to 1.3V (5mV steps) in Low-Range 
      • 1V to 5.2V (20mV steps) in High-Range 
    • Pin Programmable Output/Phase (Φ) Configuration
      • 4Φ, (3+1)Φ, (2+2)Φ, (2+1+1)Φ, (1+1+1+1)Φ
    • High-Efficiency and Low-Heat 
    • Uses Small 2520 Inductor 
    • 1MHz Nominal Switching Frequency per Phase
      • Pseudo-Random ​Spread-Spectrum Options
    • Six Multi-Function GPIOs for Hardware Buck Control
      • Enable, DVS, FPWM, and Power-OK
    • 300mA pMOS LDO (MAX77711 Only)
    • Built-In Flexible Power Sequencing with Soft-Start/Stop
    • Protection Features
      • Hard and Soft-Short Protection, UVLO, and Thermal Protection

    Applications/Uses

    • DSLR, Mirrorless, HD Video, and Action Cameras
    • 2-Cell Li+/Li-ion Equipment
    • Notebook Computers and Robots
    • Embedded Microprocessors, FPGAs, or ASICs

    Description

    The MAX77511/MAX77711 are four-phase, 3A/phase, configurable single to quad output, step-down buck regulators for 1s/2s Li+ battery inputs. Output voltage is programmable through an I2C interface between 0.25V and 5.2V. The buck has four combinable 3A switching phases (Φ) for up to four regulated outputs. Phases are configurable to higher-current multiphase outputs: 4Φ, (3+1)Φ, (2+2)Φ, (2+1+1)Φ, or (1+1+1+1)Φ.

    Six GPIOs can be purposed for I/O expansion or buck status and control. Pseudo-random spread-spectrum modulation suppresses EMI. Soft-start, soft-stop, and DVS slew times are programmable with I2C. MAX77711 offers a 300mA linear regulator.

    MAX77511/MAX77711 are available in a 64-bump, 3.54mm x 3.54mm wafer-level package (WLP).

    Simplified Block Diagram

    MAX77511, MAX77711: Simplified Block Diagram MAX77511, MAX77711: Simplified Block 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.