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3.3V/5V or Adjustable Output, Single-Cell DC-DC Converters

We Recommend Improved Performance Device, MAX1678, for New Designs

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 0.8V to 6.0V Input Supply Voltage
  • 0.9V Guaranteed Start-Up Supply Voltage
  • > 80% Efficiency Over Wide Load Range
  • 100µA No-Load Battery Current (VOUT = 3.3V)
  • 1µA Shutdown Mode
  • Up to 250kHz Switching Frequency
  • ±1.5% Reference Tolerance
  • Low-Battery Detector (LBI/LBO)
  • Available in Ultra-Small 8-Pin µMAX® Package (1.11mm high)
  • Circuit Fits in 0.2in²

Applications/Uses

  • 1-Cell Battery-Operated Equipment
  • Backup Supplies
  • Detectors
  • Pagers
  • Remote Controls

Description

The MAX866 and MAX867 are ultra-small, high-efficiency, CMOS, step-up, DC-DC switching regulators for 1-cell battery-powered systems. The MAX866 accepts a positive input voltage between 0.8V and VOUT and converts it to a higher, pin-selectable output voltage of 3.3V or 5V. The MAX867 adjustable version accepts 0.8V to 6.0V input voltages and generates a higher adjustable output voltage in the 2.7V to 6.0V range. Typical efficiencies are greater than 80%. Typical no-load supply current is 100µA (1µA in shutdown).

The MAX866/MAX867 combine ultra-low quiescent supply current and high efficiency to give maximum battery life. Its high switching frequency permits the use of small, low-cost inductors and capacitors. Additionally, internal peak-current limiting protects the IC.

Simplified Block Diagram

MAX866, MAX867: Typical Operating Circuit MAX866, MAX867: 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 .