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MAX1966

MAX1966

Low-Cost Voltage-Mode PWM Step-Down Controllers

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Overview

Description

The MAX1966/MAX1967 are voltage-mode pulse-width-modulated (PWM), step-down DC-DC controllers that are ideal for a variety of cost-sensitive applications. They drive low-cost N-MOSFETs for both the high-side switch and synchronous rectifier and require no external Schottky power diode or current-sense resistor. Short- circuit and current-limit protection is provided by sensing the drain-to-source voltage on the low-side FET. Both devices can supply outputs as low as 0.8V and are well suited for DSP cores and other low-voltage logic.

The MAX1966 has an input range of 2.7V to 5.5V while the MAX1967 has an input range of 2.7V to 28V. In ultra-low-cost designs, the MAX1966/MAX1967 can provide efficiency exceeding 90% and can achieve 95% efficiency with optimized component selection.

The MAX1966/MAX1967 operate at 100kHz and ac-commodate aluminum electrolytic capacitors and powdered-iron core magnetics in minimum-cost designs. They also provide excellent performance with high-performance surface-mount components. The MAX1966 is available in a low-cost 8-pin SO package. The MAX1967 is available in a 10-pin µMAX package.
MAX1966, MAX1967: Typical Operating Circuit MAX1966, MAX1967: Typical Operating Circuit Enlarge+

Key Features

  • Cost-Optimized Design
  • No Schottky Diode or Current-Sense Resistor Required
  • >95% Efficiency
  • Low-Cost External Components
  • All N-Channel FET Design
  • 2.7V to 5.5V Input Range (MAX1966)
  • 2.7V to 28V Input Range (MAX1967)
  • 0.8V Feedback for Low-Voltage Outputs
  • 100kHz Switching Frequency Accommodates Low-Cost Components
  • Thermal Shutdown
  • Output Current-Limit and Short-Circuit Protection

    • Applications/Uses

    • Cable Modems and Routers
    • Graphic Card Supplies
    • Networking Power Supplies
    • Set-Top Boxes
    • Telecom Power Supplies
    • Termination Supplies
    • xDSL Modems and Routers

    Parametric Specs

    Part NumberVIN
    (V)    		VIN
    (V)    		VOUT1
    (V)    		VOUT1
    (V)    		Output Adjust. MethodIOUT1
    (A)    		Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
    (kHz)    		Package/PinsBudgetary
    Price
    minmaxminmaxSee Notes
    MAX1966 2.75.50.84.5Resistor5ExternalYes1100
    SOIC (N)/8
    		$1.72 @1k
    MAX1967 28
    UMAX/10
    		$1.86 @1k
    See All Step-Down Switching Regulators (388)
    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.

    Design Resources


    MAX1966EVKIT: Evaluation Kit for the MAX1966 and MAX1967

    Quality and Environmental Data

    Product Reliability Reports: MAX1966.pdf 
    Lead-Free Package Tin (Sn) Whisker Reports

    Quality And Environmental

    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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.

    Quality Management System >
    Environmental Management System >

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    Reference Designs

    Type ID Title
    Evaluation Board3685MAX1966EVKIT Evaluation Kit for the MAX1966 and MAX1967