1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. MAX15303


Features and Benefits

  • InTune Automatic Compensation Simplifies and Speeds Design
    • Ensures Stability While Optimizing Transient Performance
    • State-Space Compensation Results in Fast Transient Response with Reduced Output Capacitance
  • Out-of-the-Box Operation Enables Fast Prototyping
    • Supports Pin-Strappable Configuration: Output Voltage, SMBus Address, Switching Frequency, Current Limit
  • Easy to Use PMBus Interface for Configuration, Control, and Monitoring
    • Flexible Sequencing and Fault Management
    • Supports Voltage Positioning
    • Configurable Soft-Start and Soft-Stop Time
    • 300kHz to 1000kHz Fixed-Frequency Operation
  • Integration Yields Small Solution Size
    • Integrated High- and Low-Side MOSFETs
    • Efficient On-Chip BabyBuck Regulator for Self-Bias Output
    • Startup into a Prebiased Output
  • Performance Optimized for Communication and Computing Systems
    • Differential Remote Voltage Sensing Enables ±1.25% VOUT Accuracy over Temperature (-40°C to +85°C)
    • 4.5V to 14V Wide Input Range
    • Output Voltage Range from 0.5V to 5.25V
    • External Synchronization

Product Details

The MAX15303 is a full-featured, flexible, efficient, 6A digital point-of-load (PoL) controller with integrated switching MOSFETs. It contains advanced power-management and telemetry features. Unlike PID-based digital power regulators, the device uses Maxim’s patented InTune automatically compensated, state-space control algorithm. The InTune control law is valid for both the small- and large-signal response and accounts for duty-cycle saturation effects. These capabilities result in fast loop transient response and reduce the number of output capacitors compared to competing digital controllers.

To help maximize system efficiency and reduce overall parts count, the device uses Maxim’s BabyBuck regulator. The BabyBuck eliminates the need for an external bias supply. The BabyBuck can be configured in two different modes to maximize system flexibility.

The device is designed to minimize the end customer’s design time. Automatic compensation eliminates the need for external compensation circuitry and allows changes to the output inductor and capacitor, without the need to manually redesign the compensation circuitry. 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 through pin strapping and does not require user-configuration firmware. This allows for rapid development of the power-supply subsystem before board-level systems engineering is completed. Maxim provides support hardware and software for configuring the device.

The MAX15303 is available in a 40-pin, 6mm × 6mm TQFN package with an exposed pad and operates over the -40°C to +85°C temperature range.


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

Product Lifecycle icon-not-recommended Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

Evaluation Kits (1)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX15303AA00+CM Material Declaration Reliability Data Thin Quad Flatpack, No Leads
MAX15303AA00+TCM Material Declaration Reliability Data Thin Quad Flatpack, No Leads
Wafer Fabrication Data MAX15303 Reliability Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.