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High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches

Smallest, Efficient, 4A DC-DC Converter for 5V/12V Applications

Product Details

The MAX15066/MAX15166 current-mode, synchronous, DC-DC buck converters deliver an output current up to 4A with high efficiency. The devices operate from an input voltage of 4.5V to 16V and provides an adjustable output voltage from 0.606V to 90% of the input voltage. The devices are ideal for distributed power systems, notebook computers, nonportable consumer applications, and preregulation applications.

The devices feature a PWM mode operation with an internally fixed switching frequency of 500kHz (MAX15066) and 350kHz (MAX15166) capable of 90% maximum duty cycle. The devices automatically enter skip mode at light loads. The current-mode control architecture simplifies compensation design and ensures a cycle-by-cycle current limit and fast response to line and load transients. A high gain transconductance error amplifier allows flexibility in setting the external compensation, simplifying the design and allowing for an all-ceramic design.

The synchronous buck regulators feature internal MOSFETs that provide better efficiency than asynchronous solutions, while simplifying the design relative to discrete controller solutions. In addition to simplifying the design, the integrated MOSFETs minimize EMI, reduce board space, and provide higher reliability by minimizing the number of external components.

Additional features include an externally adjustable soft-start, independent enable input and power-good output for power sequencing, and thermal shutdown protection. The devices offer overcurrent protection (high-side sourcing) with hiccup mode during an output short-circuit condition. The devices ensure safe startup when powering into a prebiased output.

The MAX15066/MAX15166 are available in a 2mm x 2mm, 16-bump (4 x 4 array), 0.5mm pitch wafer-level package (WLP) and are fully specified from -40°C to +85°C.

Key Features

  • Feature Integration Shrinks Solution Size
    • Integrated 40mΩ (High-Side) and 18.5mΩ (Low- Side) RDS-ON Power MOSFETs
    • Stable with Low-ESR Ceramic Output Capacitors
    • Enable Input and Power-Good Output
    • Cycle-by-Cycle Overcurrent Protection
    • Fully Protected Against Overcurrent (Hiccup Protection) and Overtemperature
  • High Efficiency Conserves Power
    • Up to 96% Efficiency (5V Input and 3.3V Output)
    • Up to 93% Efficiency (12V Input and 3.3V Output)
    • Automatic Skip Mode During Light Loads
  • Safe, Reliable, Accurate Operation
    • Continuous 4A Output Current
    • ±1% Output Accuracy Over Load, Line, and Temperature
    • Safe Startup Into Prebiased Output
    • Programmable Soft-Start
    • VDD LDO Undervoltage Lockout
  • Well Suited to Distributed Power, Networking, and Computing Applications
    • 4.5V to 16V Input Voltage Range
    • Adjustable Output Voltage Range from 0.606V to (0.9 x VIN)
  • Available in EE-Sim® Design and Simulation Tool to Slash Design Time

Applications/Uses

  • Distributed Power Systems
  • Home Entertainment (TV and Set-Top Boxes)
  • Network and Datacom
  • Preregulators for Linear Regulators
  • Servers, Workstations, and Storage
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 16
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 14
IOUT1 (A) (max) 4
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Design Tools EE-Sim
Package/Pins WLP/16
Budgetary
Price (See Notes)
$4.63 @1k
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Simplified Block Diagram

MAX15066: Typical Operating Circuit MAX15066: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

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Description

The MAX15066 evaluation kit (EV kit) provides a proven design to evaluate the MAX15066 high-efficiency, 4A, step-down regulator with integrated switches. The EV kit is preset for 1.8V output at load currents up to 4A from a 4.5V to 16V input supply.

View Details

Features

  • 4.5V to 16V Input Voltage Range
  • Fixed 500kHz Switching Frequency
  • Adjustable Output Voltage Range from 0.606V to (0.9 x VIN)
  • Proven PCB Layout
  • Fully Assembled and Tested

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EE-Sim: Design & Simulate MAX15066

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 16
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 14
IOUT1 (A) (max) 4
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Design Tools EE-Sim
Package/Pins WLP/16
Budgetary
Price (See Notes)
$4.63 @1k

Key Features

  • Feature Integration Shrinks Solution Size
    • Integrated 40mΩ (High-Side) and 18.5mΩ (Low- Side) RDS-ON Power MOSFETs
    • Stable with Low-ESR Ceramic Output Capacitors
    • Enable Input and Power-Good Output
    • Cycle-by-Cycle Overcurrent Protection
    • Fully Protected Against Overcurrent (Hiccup Protection) and Overtemperature
  • High Efficiency Conserves Power
    • Up to 96% Efficiency (5V Input and 3.3V Output)
    • Up to 93% Efficiency (12V Input and 3.3V Output)
    • Automatic Skip Mode During Light Loads
  • Safe, Reliable, Accurate Operation
    • Continuous 4A Output Current
    • ±1% Output Accuracy Over Load, Line, and Temperature
    • Safe Startup Into Prebiased Output
    • Programmable Soft-Start
    • VDD LDO Undervoltage Lockout
  • Well Suited to Distributed Power, Networking, and Computing Applications
    • 4.5V to 16V Input Voltage Range
    • Adjustable Output Voltage Range from 0.606V to (0.9 x VIN)
  • Available in EE-Sim® Design and Simulation Tool to Slash Design Time

Applications/Uses

  • Distributed Power Systems
  • Home Entertainment (TV and Set-Top Boxes)
  • Network and Datacom
  • Preregulators for Linear Regulators
  • Servers, Workstations, and Storage

Description

The MAX15066/MAX15166 current-mode, synchronous, DC-DC buck converters deliver an output current up to 4A with high efficiency. The devices operate from an input voltage of 4.5V to 16V and provides an adjustable output voltage from 0.606V to 90% of the input voltage. The devices are ideal for distributed power systems, notebook computers, nonportable consumer applications, and preregulation applications.

The devices feature a PWM mode operation with an internally fixed switching frequency of 500kHz (MAX15066) and 350kHz (MAX15166) capable of 90% maximum duty cycle. The devices automatically enter skip mode at light loads. The current-mode control architecture simplifies compensation design and ensures a cycle-by-cycle current limit and fast response to line and load transients. A high gain transconductance error amplifier allows flexibility in setting the external compensation, simplifying the design and allowing for an all-ceramic design.

The synchronous buck regulators feature internal MOSFETs that provide better efficiency than asynchronous solutions, while simplifying the design relative to discrete controller solutions. In addition to simplifying the design, the integrated MOSFETs minimize EMI, reduce board space, and provide higher reliability by minimizing the number of external components.

Additional features include an externally adjustable soft-start, independent enable input and power-good output for power sequencing, and thermal shutdown protection. The devices offer overcurrent protection (high-side sourcing) with hiccup mode during an output short-circuit condition. The devices ensure safe startup when powering into a prebiased output.

The MAX15066/MAX15166 are available in a 2mm x 2mm, 16-bump (4 x 4 array), 0.5mm pitch wafer-level package (WLP) and are fully specified from -40°C to +85°C.

Simplified Block Diagram

MAX15066: Typical Operating Circuit MAX15066: Typical Operating 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