Analog Devices / Maxim Integrated MAX77541 Dual-Phase Buck Converter

Analog Devices MAX77541 Dual-Phase Buck Converter is a high-efficiency step-down converter with two 3A switching phases for single-cell Li+ battery and 5VDC systems. It uses an adaptive COT (constant on-time) current-mode control architecture, and the two 3A switching phases can be configured as either one (2Φ, 6A) or two (1Φ, 3A each) outputs. The output voltages are preset with resistors and are further adjustable through an I²C compatible interface. With 91% peak efficiency, low quiescent current, and compact solution size, the Analog Devices MAX77541 is ideal for battery-powered, space-constraint equipment.

Programmable switching frequency, frequency tracking, spread-spectrum, and an ultra-sonic mode allow easier system optimization for noise-sensitive applications. Dedicated EN, POK, and FPWM pins provide options for direct hardware control, while more programmable options such as soft-start/stop and ramp-up/down slew-rates are available through I²C. An array of built-in protections ensures safe operation under abnormal operating conditions.

Features

2.2V to 5.5V input voltage range
0.3V to 5.2V output voltage range
Two 3A bucks (1Φ) or one 6A buck (2Φ)
±0.5% V_OUT accuracy (default V_OUT at 25°C)
91% peak efficiency (3.8V_IN, 1.1V_OUT, 1.6MHz)
Auto SKIP/PWM transition and low-power mode
Drop-out operation with 98% of max. duty cycle
Programmable soft-start/soft-stop and ramp-up/ramp-down slew-rates
Prebiased startup and active output discharge
Programmable inductor peak current limits for solution size optimization

0.5/1.0/1.6MHz nominal switching frequency
Spread-spectrum modulation for EMI reduction
Internal/external frequency tracking
Default V_OUT and phase configuration setting by R_SEL1 and R_SEL2
I²C slave ADDR, ILIM, and F_SW preset by R_CFG
Dedicated ENx, POKx and FPWMx for each buck
UVLO, thermal shutdown, and short-circuit protection
High-speed I²C serial I/F
Available in 30-WLP (2.51mm x 2.31mm x 0.7mm) and 24-FC2QFN (3mm x 3mm) packages
Less than 55mm2 total solution size with 2520 inductors

Applications

Single-cell Li+ and 5VDC systems
Gaming consoles and VR/AR headsets

Microprocessors, FPGAs, DSPs, and ASICs
Network switches and routers

Analog Devices / Maxim Integrated MAX77541 Dual-Phase Buck Converter

Features

Applications

Typical Applications Circuit

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