MAX18066

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

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


Please check latest availability status for a specific part variant.

Description

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.

MAX18066, MAX18166: Block Diagram MAX18066, MAX18166: Block Diagram Enlarge+

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

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX18066EVKIT: Evaluation Kit for the MAX18066/MAX18166

Tools & Models

  • EE-Sim: Design & Simulate MAX18066
  • Request Reliability Report for: MAX18066 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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