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Analog Devices / Maxim Integrated MAX77503 Buck Converter

Analog Devices MAX77503 Buck Converter is a synchronous 1.5A step-down DC-DC converter. This buck converter is optimized for portable 2-cell and 3-cell battery-operated and USB-C™ applications. The MAX77503 buck converter operates at an input voltage range from 3V and 14V. The output voltage is adjustable between 0.8V and 5V in 150mV steps through an I2C interface. It can also be adjusted from 1.55V to 99% of the supply voltage with external feedback resistors. The MAX77503 buck converter features a low-IQ SKIP mode, allowing excellent light load efficiency.

This buck converter has dedicated enable and power-OK pins for simple hardware control. The Analog Devices MAX77503 buck converter utilizes I2C serial interface for full configuration and control for dynamic voltage scaling and system power optimization. This buck converter ensures safe operation under abnormal operating conditions through built-in Under-Voltage Lock-Out (UVLO), output active discharge, cycle-by-cycle current limit, thermal shutdown, and short-circuit protection.

Features

  • 1.5A single channel buck regulator
  • High-efficiency and low-IQ extend battery life
    • 94% peak efficiency at 7.4VSUP, 3.3VOUT (2520 inductor)
    • 9μA IQ (12VSUP, 1.8VOUT internal feedback version)
    • Selectable light-load SKIP and forced-PWM modes
  • Hardware or software control
    • Enable input and power-OK output pins
    • Optional I2C full control interface
  • Protection features
    • Cycle-by-cycle inductor peak current limit
    • Short-circuit hiccup mode, UVLO, and thermal shutdown protection
    • 1ms default soft-start
  • Small size
    • 1.85mm x 1.4mm (0.7mm maximum height) WLP
    • 12-bump, 0.4mm pitch, and 3 x 4 array

Specifications

  • 3V to 14V input voltage range
  • 0.8V to 99%VSUP output voltage range
    • 0.8V to 5V I2C programmable in 50mV steps
    • 1.55V to 99%VSUP with external feedback resistors
    • 1.2V, 1.8V, or 3.3V factory preset options
  • 1MHz or 550kHz fixed-frequency switching
  • -40°C to 85°C operating temperature range

Applications

  • 2-cell/3-cell high power density supplies
  • Portable Li+/Li-ion battery-powered devices
  • Drones, HD cameras, and notebook computers
  • Space-constrained portable electronics

Additional Resources

Application Circuit

Application Circuit Diagram - Analog Devices / Maxim Integrated MAX77503 Buck Converter

Mechanical Drawing

Mechanical Drawing - Analog Devices / Maxim Integrated MAX77503 Buck Converter
發佈日期: 2018-10-04 | 更新日期: 2023-04-24