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Analog Devices / Maxim Integrated MAX77542 4-Phase High-Efficiency Buck Converters

Analog Devices MAX77542 Quad-Phase High-Efficiency Buck Converters employs an adaptive constant on-time (COT) current-mode control scheme and a flexible architecture that supports five phase configurations. The MAX77542 has a wide input-voltage range that allows a direct conversion for less than 1V outputs from 1- to 3-cell Li+ batteries and USB power delivery (PD) supply rails. The output voltages are preset with resistors and are further adjustable through an I2C-compatible interface.

The ADI MAX77542 Converters include a flexible sequencer and programmable soft-start/soft-stop slew rates that provide controlled transitions between operating states. Programmable switching frequency, frequency tracking, and spread-spectrum features enable easier system optimization for noise-sensitive applications. Multifunction I/Os permit flexible control of each output for EN, LPM, FPWM, POK, RSTINB, and RSTOB status. An array of built-in protections guarantees safe operation under abnormal operating conditions.

Features

  • 2.8V to 16V input-voltage range
  • 0.3V to 5.2V output-voltage range
  • Max 16A (4A/Φ) with 5x phase configurations
  • ±0.5% VOUT accuracy (default VOUT at +25°C)
  • 94% peak efficiency (7.6VIN, 3.3VOUT, 1MHz)
  • Auto Skip/PWM transition and low-power mode
  • Drop-out operation with 98% of max duty cycle
  • Differential output-voltage sensing
  • Flexible sequencer with soft-start/soft-stop slew rates
  • Prebiased startup and active output discharge
  • 0.5MHz/1.0MHz/1.5MHz nominal switching frequencies
  • Spread-spectrum modulation for EMI reduction
  • Internal/external frequency tracking
  • Default VOUT and phase configuration setting by RSELx
  • Multifunction I/Os for EN, LPM, FPWM, and POK
  • UVLO, thermal shutdown, and short-circuit protection
  • High-speed, I2C serial interface
  • Available in 60-bump WLP (4.36mm x 2.56mm x 0.65mm)
  • Less than 115mm2 total solution size with 2520x inductors

Applications

  • 1- to 3-cell Li+ and USB-C power delivery systems
  • Audio/video equipment and PCIe/RAID cards
  • Application processors, FPGAs, DSPs, and ASICs

Typical Applications Circuit

Application Circuit Diagram - Analog Devices / Maxim Integrated MAX77542 4-Phase High-Efficiency Buck Converters
Inilathala: 2023-08-29 | Na-update: 2023-10-02