0V85-40A Buck Regulator Using MAX15301


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The MAX15301 is a full-featured, highly efficient, digital point-of-load (PoL) controller with advanced power management and telemetry features.

The MAX15301 includes multiple features to optimize efficiency. An internal switch BabyBuck regulator generates the gate drive and the internal bias supplies for the controller with low power loss. An advanced, high-efficiency MOSFET gate driver has adjustable nonoverlap timing and load-variable gate-drive voltage to minimize switching losses over the full range of voltage, current, and temperature.

The MAX15301 was designed for end-customer’s design environment. An on-board PMBus-compliant serial bus interface enables communication with a supervisory controller for monitoring and fault management. A full suite of power management features eliminates the need for complicated and expensive sequencing and monitoring ICs. Basic DC-DC conversion operation can be set up via pin strapping and does not require user configuration firmware. This allows for rapid development of the power-supply subsystem before boardlevel systems engineering is completed. Maxim provides support hardware and software for configuring the IC.

Benefits and Features

  • InTune Automatic Compensation Ensures Stability While Optimizing Transient Performance
  • State-Space Compensation Results in Fast Transient Response with Reduced Output Capacitance
  • Differential Remote Voltage Sensing Enables ±1% VOUT Accuracy over Temperature (-40°C to +85°C)
  • PMBus Interface for Configuration, Control, and Monitoring
  • Supports Voltage Positioning
  • High Output 2A/4A MOSFET Driver
  • Wide Input Range of 4.5V to 14V
  • Output Voltage Range from 0.5V to 5.25V
  • Startup into a Prebiased Output
  • Configurable Soft-Start and Soft-Stop Time
  • Fixed-Frequency Operation and Synchronization
  • Flexible Sequencing and Fault Management
  • Pin-Strappable Configuration: Output Voltage, SMBus Address, Switching Frequency, Current Limit


  • Servers
  • Storage Systems
  • Routers/Switches
  • Base-Station Equipment
  • Power Modules

Product includes professional library, confirmed schematic design. Our design has also a full output job and active Bill of Materials.

Additional information

Design Files (Altium Designer)

Schematic Design & Library


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