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Analog Devices / Maxim Integrated MAX77857 Buck-Boost Converters

Analog Devices MAX77857 Buck-Boost Converters are high-efficiency, high-performance converters targeted for systems requiring a 2.5V to 16V wide input voltage range. The MAX77857 Buck-Boost Converters feature a 7A switching current and can supply up to 6A output current in buck mode and up to 4A in boost mode. The buck-boost converters operate in PWM mode and implement an automatic SKIP mode to improve light-load efficiency. These Analog Devices devices are available in a 2.83mm x 2.03mm, 35-bump, and 31-bump Wafer-Level Package (WLP), and a 3.5mm x 3.5mm, 16-lead Flip Chip QFN (FC2QFN) package. Typical applications include USB power delivery OTG, Qualcomm® quick charge™, USB VBUS supply, DRP ports, DSLR, display power, up to 3-cell Li-Ion battery applications, etc.

Features

  • 2.5V to 16V wide input voltage range
  • Default output voltage
    • 5V with internal feedback resistors
    • 3V to 15V with external feedback resistors
  • I2C-programmable output voltage after startup
    • 4.5V to 15V with internal feedback resistors
    • 3.0V to 15V with external feedback resistors
  • Maximum output current
    • Up to 6A buck mode
    • Up to 4A boost mode (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
    • Forced PWM mode operation (FPWM)
    • Power-OK (POK) status and fault interrupt masks
  • Soft-start
  • Output active discharge
  • Open-Drain Power-OK (POK) monitor and fault condition interrupt (MAX77857B/C Only)
  • Protection Features
    • Undervoltage Lockout (UVLO)
    • Overcurrent Protection (OCP)
    • Overvoltage Protection (OVP)
    • Thermal Shutdown (THS)
  • High-Density Interconnect (HDI) PCB is not required
  • -40°C to 85°C operating temperature range
  • WLP-35,  WLP-31,  and FC2QFN-16 package options

Applications

  • USB Power Delivery (USB-PD) OTG
  • Qualcomm® quick charge™
  • USB VBUS supply and DRP (Dual Role Power) ports
  • DSLR and DSLR lens
  • Display power
  • Up to 3-cell Li-Ion battery applications
  • Notebooks, computers, and tablet PCs

Development Tools

Analog Devices / Maxim Integrated MAX77857 Evaluation Kit

Fully assembled and tested printed circuit board that demonstrates the MAX77857 converter.

Learn Moreinformace o Analog Devices / Maxim Integrated MAX77857 Evaluation Kit View Productsvztahující se k Analog Devices / Maxim Integrated MAX77857 Evaluation Kit

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX77857 Buck-Boost Converters

Application Circuit Diagram

Application Circuit Diagram - Analog Devices / Maxim Integrated MAX77857 Buck-Boost Converters

Videos

Zveřejněno: 2022-05-20 | Aktualizováno: 2023-04-14