General Description

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.

Benefits and Features

● 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

● 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 2520

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