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Analog Devices / Maxim Integrated MAX77511 & MAX77711 Quad-Phase Buck Converters

Analog Devices MAX77511 and MAX77711 Quad-Phase Buck Converters are four-phase, 3A/phase, configurable step-down buck regulators for 1s/2s Li+ battery inputs. The output voltage of the MAX77511 and MAX77711 is programmable through an I2C interface between 0.25V and 5.2V. Soft-start, soft-stop, and DVS slew times are also programmable. These devices feature six GPIOs which can be purposed for I/O expansion or buck status and control. Pseudo-random spread-spectrum modulation suppresses EMI. 

The MAX77511 and MAX77711 Buck Converters have four combinable 3A switching phases (Φ) for up to four regulated outputs. Phases are configurable to higher-current multiphase outputs: 

  • 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)

The MAX77711 integrates a 300mA PMOS low-dropout linear voltage regulator (LDO). A 100Ω active-discharge resistor is available to quickly discharge the LDOs output after the regulator has been disabled. The LDO is not available in the MAX77511.

Analog Devices MAX77511 and MAX77711 Quad-Phase Buck Converters are available in a 3.54mm x 3.54mm Wafer-Level Package (WLP) and feature a wide -40°C to +125°C operating temperature range.

Features

  • 3A/phase configurable buck regulator
    • 3A, 6A, 9A, or 12A output current capability
  • 3V to 10V input voltage range
  • 25V to 5.2V output voltage range
    • 25V to 1.3V (5mV steps) in low-range
    • 1V to 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 with 2520 inductor
    • 94% peak (3.3VOUT,4VIN)
    • 85% peak (1.1VOUT,4VIN)
  • 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 sequencing with soft-start/stop
  • Protection Features
    • Hard and soft-short protection, UVLO, and thermal protection
  • -40°C to +125°C operating temperature range
  • 3.54mm x 3.54mm WLP-64 package

Applications

  • DSLR, HD video mirrorless, and action cameras
  • 2-cell Li+/Li-ion equipment
  • Notebook computers and tablets
  • Robotics
  • Embedded microprocessors, FPGAs, and ASICs

Development Tools

Analog Devices / Maxim Integrated MAX77511 Evaluation Kit (MAX77711AEVKIT)

Fully assembled and tested demonstration platform for the MAX77711 Quad-Phase Buck Converter.

Learn Moreacerca de Analog Devices / Maxim Integrated MAX77511 Evaluation Kit (MAX77711AEVKIT) View Productsrelacionado con Analog Devices / Maxim Integrated MAX77511 Evaluation Kit (MAX77711AEVKIT)

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX77511 & MAX77711 Quad-Phase Buck Converters
Publicado: 2022-03-30 | Actualizado: 2023-04-17