MAX629
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MAX629

28V, Low-Power, High-Voltage, Boost or Inverting DC-DC Converter

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1ku List Price Starting From $4.58
Features
  • Internal, 500mA, 28V N-Channel Switch (No External FET Required)
  • Generates Positive or Negative Output Voltages
  • 80µA Supply Current
  • 1µA Max Shutdown Current
  • Up to 300kHz Switching Frequency
  • Adjustable Current Limit Allows Use of Small, Inexpensive Inductors
  • 8-Pin SO Package
Additional Details
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The MAX629 low-power DC-DC converter features an internal N-channel MOSFET switch and programmable current limiting. It is designed to supply positive or negative bias voltages up to ±28V from input voltages in the 0.8V to VOUT range, and can be configured for boost, flyback, and SEPIC topologies.

The MAX629's current-limited pulse-frequency-modulation (PFM) control scheme provides high efficiency over a wide range of load conditions. An internal, 0.5A N-channel MOSFET switch reduces the total part count, and a high switching frequency (up to 300kHz) allows for tiny surface-mount magnetics.

The MAX629's combination of low supply current, logic-controlled shutdown, small package, and tiny external components makes it an extremely compact and efficient high-voltage biasing solution that's ideal for battery-powered applications. The MAX629 is available in an 8-pin SO package.

Applications

  • 2-Cell and 3-Cell Battery-Powered Applications
  • High-Efficiency DC-DC Boost Converters
  • Palmtop Computers
  • Positive or Negative LCD Bias Generators
  • Varactor Tuning Diode Bias
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file View Data Sheet (Rev.2)
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Part Models 2
1ku List Price Starting From $4.58
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MAX629

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Data Sheet

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UPDATED 10/29/2020
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MAX629: 28V, Low-Power, High-Voltage, Boost or Inverting DC-DC Converter Data Sheet (Rev.2)

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UPDATED 01/01/1900
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MAX629: 28V、低功耗、高压、boost或反相DC-DC转换器 Data Sheet

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UPDATED 06/01/1997
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MAX629: 28V、低電力、高電圧、ブーストまたは反転DC-DCコンバータ Data Sheet (Rev.1)

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Reliability Data

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UPDATED 01/12/2023
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MAX629 Reliability Data redirect icon

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Design Note

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UPDATED 09/24/2008
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Stack References for Higher Adjustable Voltages from a Digital Pot redirect icon

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UPDATED 03/14/2005
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SMBus I/O Expander Controls LCD Bias Voltage redirect icon

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UPDATED 11/29/2001
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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX629ESA+ Small-Outline IC, Narrow (0.15in) external-link
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MAX629ESA+T Small-Outline IC, Narrow (0.15in) external-link
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Apr 7, 2023

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