MAX18066
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MAX18066

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

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

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $2.09
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
Additional Details
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The MAX18066/MAX18166 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 (MAX18066) and 350kHz (MAX18166) 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 allceramic 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 (highside sourcing) with hiccup mode during an output shortcircuit condition. The devices ensure safe startup when powering into a prebiased output.

The MAX18066/MAX18166 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.

Applications

  • Distributed Power Systems
  • Home Entertainment (TV and Set-Top Boxes)
  • Network and Datacom
  • Preregulators for Linear Regulators
  • Servers, Workstations, and Storage
Part Models 2
1ku List Price Starting From $2.09

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX18066EWE+
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MAX18066EWE+T
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX18066EVKIT

Evaluation Kit for the MAX18066/MAX18166

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MAX18066EVKIT

Evaluation Kit for the MAX18066/MAX18166

Evaluation Kit for the MAX18066/MAX18166

Features and Benefits

  • 4.5V to 16V Input Voltage Range
  • Fixed 500kHz (MAX18066) and 350kHz (MAX18166) Switching Frequency
  • Adjustable Output Voltage Range from 0.606V to (0.9 x VIN)
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX18066 evaluation kit (EV kit) provides a proven design to evaluate the MAX18066 and MAX18166 highefficiency, 4A, step-down regulators with integrated switches. The EV kit is preset with the MAX18066 for 1.8V output at load currents up to 4A from a 4.5V to 16V input supply. The MAX18166 is pin-compatible with the MAX18066 and can be ordered for evaluation with this EV kit.

Applications

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

Tools & Simulations 1

Reference Designs

Reference Designs 2

MAXREFDES1127

2.5V/3A, Synchronous Step-Down Converter Using the MAX18066

Figure 1. MAXREFDES1139 hardware.

5V/4A Synchronous Buck Converter using MAX18066

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