MAX653
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MAX653

5V/3.3V/3V Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC Converters

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Low Supply Current, High-Efficiency Over Wide Load Range

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1ku List Price Starting From $2.13
Features
  • High Efficiency for a Wide Range of Load Currents
  • 10µA Quiescent Current
  • Output Currents Up to 225mA
  • Preset or Adjustable Output Voltage:
    • 5.0V (MAX639)
    • 3.3V (MAX640)
    • 3.0V (MAX653)
  • Low-Battery Detection Comparator
  • Current-Limiting PFM Control Scheme
Additional Details
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The MAX639/MAX640/MAX653 step-down switching regulators provide high efficiency over a wide range of load currents, delivering up to 225mA. A current-limiting pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency at heavy loads), while using only 10µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.

The MAX639/MAX640/MAX653 input range is 4V to 11.5V, and the devices provide lower preset output voltages of 5V, 3.3V, and 3V, respectively. Or, the output can be user-adjusted to any voltage from 1.3V to the input voltage.

The MAX639/MAX640/MAX653 have an internal 1A power MOSFET switch, making them ideal for minimum-component, low- and medium-power applications. For increased output drive capability, use the MAX649/MAX651/MAX652 step-down controllers, which drive an external P-channel FET to deliver up to 5W.

Applications

  • 5V to 3.3V Conversion
  • 9V Battery to 5V, 3.3V, or 3V Conversion
  • High-Efficiency Linear Regulator Replacement
  • Portable Instruments and Handy-Terminals
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Part Models 4
1ku List Price Starting From $2.13
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MAX653

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UPDATED 09/07/2005
English

MAX639-MAX653: 5V/3.3V/3V Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC Converters Data Sheet (Rev.4)

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UPDATED 01/01/1900
Chinese

1138: 5V/3.3V/3V/可调、高效率、低IQ、降压型DC-DC转换器 Data Sheet

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UPDATED 08/01/1997
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MAX639-MAX653_jp: 5V/3.3V/3V可変、高効率、低IQ、ステップダウンDC-DCコンバータ Data Sheet (Rev.3)

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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
MAX653CSA+ Small-Outline IC, Narrow (0.15in) external-link
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MAX653CSA+T Small-Outline IC, Narrow (0.15in) external-link
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MAX653ESA+ Small-Outline IC, Narrow (0.15in) external-link
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MAX653ESA+T Small-Outline IC, Narrow (0.15in) external-link
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  • Material Declaration external-link
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5V/3.3V/3V or Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC Controllers

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