16V/16A, Quad-Phase High-Efficiency Buck Converter

The MAX77542 is a high-efficiency step-down converter with four 4A switching phases. It uses an adaptive constant on-time (COT) current-mode control scheme and its flexible architecture supports five phase configurations. Its wide input-voltage range enables 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.

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

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

* 2.8V to 16V Input-Voltage Range

* 0.3V to 5.2V Output-Voltage Range

* Max 16A (4A/Φ) with Five 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 Frequency