Analog Devices MAX77756 Product Info

• Wide Input Power Supply
  • 3V to 24V Supply Voltage
  • 500mA (max) Output Current
  • 1.8V, 3.3V, or 5.0V Factory-Set V_OUT with Optional I²C Control: 1.5V to 7.5V in 50mV Steps
  • External Feedback Resistor V_OUT Option (1V to 99% V_SUP)
  • Hardware or Software Enable
• Dual-Input Power MUX Replaces Common-Cathode Diode Arrays
  • Automatic Ideal-Diode ORing Voltage Selector
  • 250mΩ MOSFETs Minimize Power Consumption, BOM, and Solution Size
• Low I_Q Enables Always-On Rails
  • 1.5µA Quiescent Current (Only SUP Powered)
  • 19µA Quiescent Current (IN1/IN2 Powered)
  • 88% Peak Efficiency (12V_SUP, 3.3V_OUT)
• Safe and Easy to Use
  • Short-Circuit and Thermal Protection
  • 8ms Soft-Start
  • Software-Enabled Spread Spectrum
  • Pin-Programmable Inductor Peak Current Level
• Small Size
  • 2.33mm × 1.42mm (0.7mm max height) Wafer-Level Package (WLP)
  • 15-Bump, 0.4mm Pitch, 3 × 5 Array

The MAX77756 is a synchronous 500mA step-down DC-DC converter with integrated dual-input power multiplexer (MUX). The converter operates on an input supply as low as 3.0V and as high as 24V. Default output voltage is factory-programmed to either 1.8V, 3.3V, or 5.0V. Output voltage is further adjustable through external resistors or an I²C serial interface.

The dual-input power MUX selects the higher voltage from two different input sources to power the step-down converter. Control circuitry ensures that only one channel of the MUX is on at a time to prevent cross-conduction between input sources. For single-input applications, the MUX can be bypassed and the step-down converter can be powered directly from the SUP pin.

The MAX77756 is available in a small 2.33mm × 1.42mm (0.7mm max height), 15-bump wafer-level package (WLP). For a similar buck converter without a power MUX, refer to the MAX77596.

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Applications

• Battery-Powered Systems, Backup Battery, Uninterruptible Rails
• Home Automation, Low I_Q Smart Hubs
• Notebook and Tablet Computers
• USB Type-C Power Delivery Accessories and Devices