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16VIN/6A, Dual-Phase High-Efficiency Buck Converter

High Efficiency and Power Density Single Step Conversions to Core Voltages from USB-C Rails and Multi cell Batteries

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4
VIN (V) (max) 16
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 5.2
IOUT1 (A) (max) 3
Output Adjust. Method Preset, Resistor, I2C
Synchronous Switching? Yes
Power Good Signal Yes
IQ (mA) (typ) 0.3
# DC-DC Outputs 2
Switching Frequency (kHz) 1000
1600
500
Design Tools EE-Sim
Package/Pins WLP HC/30
Budgetary
Price (See Notes)
0.94
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4
VIN (V) (max) 16
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 5.2
IOUT1 (A) (max) 3
Output Adjust. Method Preset, Resistor, I2C
Synchronous Switching? Yes
Power Good Signal Yes
IQ (mA) (typ) 0.3
# DC-DC Outputs 2
Switching Frequency (kHz) 1000
1600
500
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=29507', '')
Package/Pins WLP HC/30
Budgetary
Price (See Notes)
0.94

Key Features

  • 4V to 16V Input Voltage Range
  • 0.5V to 5.2V Output Voltage Range
  • Resistor Configurable Default VOUT
  • Two 3A Bucks (1Φ) or One 6A Buck (2Φ)
  • ±0.5% VOUT Accuracy (Default VOUT at 25°C)
  • 94% Peak Efficiency (7.6VIN, 3.3VOUT, 1MHz)
  • Auto SKIP/PWM and Low-Power Mode
  • 98% Max. Duty Cycle Dropout Operation
  • Programmable Soft-Start/Stop and Ramp-Up/Down Slew Rates
  • Pre-Biased Startup and Active Output Discharge
  • Programmable Inductor Peak Current Limits
  • 0.5/1.0/1.6MHz Nominal Switching Frequency
  • Spread-Spectrum Modulation
  • Internal/External Frequency Tracking
  • Ultrasonic Mode
  • Dedicated EN, POK, and FPWM Pins
  • Undervoltage lockout (UVLO), Thermal Shutdown, and Short-Circuit Protection
  • High-Speed I2C I/F with 3-Slave Address Options
  • 30-WLP (2.51mm x 2.31mm) and 24-FC2QFN (3mm x 3mm) Packages
  • Less than 55mm2 Total Solution Size

Applications/Uses

  • 2/3-Cell Li+ and USB-C Power Delivery Systems
  • Audio and Video Equipment
  • Microprocessors, field-programmable gate arrays (FPGAs), digital signal processors (DSPs),andapplication-specific integrated circuits (ASICs)
  • Networking and PCIe®/redundant array of inexpensive disks (RAID) Cards

Description

The MAX77540 is a high-efficiency step-down converter with two 3A switching phases. 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. Its wide input voltage range enables a direct conversion for sub-1V outputs from 3-cell Li+ batteries, USB PD, and 12VDC supply rails. The output voltages are preset with resistors and are further adjustable through an I2C-compatible interface. With 94% peak efficiency, low quiescent current, and compact solution size, the MAX77540 is ideal for battery powered, space-constraint equipment.

Programmable switching frequency, frequency tracking, spread-spectrum, and ultrasonic mode allow easier system optimization for noise-sensitive applications. Dedicated EN, POK, and FPWMB 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 insures safe operation under abnormal operating conditions.

Simplified Block Diagram

MAX77540: Typical Applications Circuit MAX77540: Typical Applications Circuit Zoom icon

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 .