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5.5VIN/6A, Dual-Phase High-Efficiency Buck Converter

High Power Density and Efficiency Flexible Buck Converter for 1S Battery

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.3
VOUT1 (V) (max) 5.2
IOUT1 (A) (max) 3
Switch Type Internal
Output Adjust. Method Preset, Resistor, I2C
Synchronous Switching? Yes
Power Good Signal Yes
IQ (mA) (typ) 0.31
# DC-DC Outputs 2
Switching Frequency (kHz) 1000
1600
500
Design Tools EE-Sim
Package/Pins WLP HC/30
Budgetary
Price (See Notes)
0.84
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.3
VOUT1 (V) (max) 5.2
IOUT1 (A) (max) 3
Switch Type Internal
Output Adjust. Method Preset, Resistor, I2C
Synchronous Switching? Yes
Power Good Signal Yes
IQ (mA) (typ) 0.31
# DC-DC Outputs 2
Switching Frequency (kHz) 1000
1600
500
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=29539', '')
Package/Pins WLP HC/30
Budgetary
Price (See Notes)
0.84

Key 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% VOUT Accuracy (Default VOUT at 25°C)
  • 91% Peak Efficiency (3.8VIN, 1.1VOUT, 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 VOUT and Phase Configuration Setting by RSEL1 and RSEL2
  • I2C Slave ADDR, ILIM, and FSW Preset by RCFG
  • 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/Uses

  • Single-Cell Li+ and 5VDC Systems
  • Gaming Consoles and VR/AR Headsets
  • Microprocessors, FPGAs, DSPs, and ASICs
  • Network Switches and Routers

Description

The MAX77541 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 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.

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .