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6A Digital PoL DC-DC Converter with InTune Automatic Compensation

6A InTune Automatically Compensated Converter with PMBus Telemetry

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.

Key Features

  • 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

Applications/Uses

  • Base-Station Equipment
  • Power Modules
  • Routers/Switches
  • Servers
  • Storage Systems
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 14
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 5.25
IOUT1 (A) (max) 6
Switch Type Internal
Preset VOUT (V) 1
5
Output Adjust. Method Digital/VID
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins TQFN HYBRID/40
Budgetary
Price (See Notes)
$3.72 @1k
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Simplified Block Diagram

MAX15303: Functional Diagram MAX15303: Functional Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX15303 evaluation kit (EV kit) is a proven application circuit design for the MAX15303 digital DC-DC controller integrated circuit (IC). The EV kit allows the user to easily modify and test the EV kit with different operating conditions. The EV kit can be used as a standalone board if desired. However, to take full advantage of the IC’s capability, the user must connect the EV kit to a PC with the Maxim PowerTool MAXPOWERTOOL002# USB-to-PMBus interface dongle and then control and monitor the EV kit with Maxim’s digital PowerTool graphical user interface (GUI) software. The PowerTool GUI allows a PC to control the PMBus interface and to collect real-time data from the EV kit. The PowerTool is Windows XP®, Windows Vista®, and Windows®7 compatible. It provides a simple interface for exercising the features of the IC.

View Details

Features

  • InTune Digital Point-of-Load (PoL) Switched-Mode Power Supply (SMPS)
    • Digital State-Space Control
    • Dual-Edge-Modulated Pulse-Width Modulation (PWM)
    • 300kHz to 1MHz Switching Frequency
    • 5V to 12V Input Voltage Range Using Linear Mode
    • 6.5V to 12V Input Voltage Range Using BabyBuck Mode
    • 0.6V to 3.3V Output Voltage Range
    • 6A Output Current Capability
    • Single-Phase Operation
  • Pin-Strap or PMBus Configuration
  • SMB Connectors for Low-Noise Measurements
  • Connectors for Multiple-Rail Evaluation
  • PMBus Interface for Control and Monitoring
  • High-Speed Serial-Port Diagnostics

The EV kit requires the use of the MAXPOWERTOOL002# which is not included and must be purchased separately.

/en/design/design-tools/ee-sim.html?

Support & Training

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 14
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 5.25
IOUT1 (A) (max) 6
Switch Type Internal
Preset VOUT (V) 1
5
Output Adjust. Method Digital/VID
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins TQFN HYBRID/40
Budgetary
Price (See Notes)
$3.72 @1k

Key Features

  • 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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX15303: Functional Diagram MAX15303: Functional Diagram 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