MAX1627
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MAX1627

5V/3.3V or Adjustable, 100% Duty Cycle, High-Efficiency, Step-Down DC-DC Controllers

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Efficient, Low-Cost, Step-Down Controllers Ideally Suitable for 1.5V CPU I/O Power

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1ku List Price Starting From $1.86
Features
  • Reduce External Components and Total Cost
    • 300KHz PWM Switching Reduces Component Size
    • Tiny Surface-Mount Inductor
  • Reduce Power Dissipation
    • > 90% Efficiency from 3mA to 2A Loads
    • Low Dropout Voltage
    • 100% Maximum Duty Cycle
  • Reduce Number of DC-DC Controllers to Stock
    • Wide 2.6V to 16.5V Input Voltage Options
    • Selectable 3.3V and 5V or Adjustable 1.3V to 16V Output Voltage Options
  • Reduce System Power Consumption
    • 90µA Max Quiescent Current
    • 1µA Max Shutdown Current
  • Operates Reliably in Adverse Environment
    • Soft-Start Limits Startup Current
    • Current-Limited Control Scheme
  • Increase Design Flexibility
    • External P-Channel MOSFET Allows Output Power of > 12.5W
Additional Details
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The MAX1626/MAX1627 step-down DC-DC controllers operate over a 2.6V to 16.5V input voltage range. The controllers deliver load current from 1mA to more than 2A. The MAX1626 has pin-selectable 3.3V and 5V outputs. The MAX1627 supports adjustable outputs from 1.3V to 16V.

A unique current-limited, pulse-frequency-modulation (PFM) control scheme operates up to 100% duty cycle, resulting in very low dropout voltage. This control scheme eliminates minimum load requirements and reduces supply current under light loads to 90µA (versus 2mA to 10mA for common pulse-width modulation controllers).

The devices are available in a 8-pin SOIC package (-40°C to +85°C) and dice (0°C to +70°C).

Applications

  • 5V to 3.3V Green PC Applications
  • Battery-Powered Applications
  • Handheld Computers
  • High-Efficiency Step-Down Regulation
  • Low-Cost Notebook Computer Supplies
  • Minimum Component DC-DC Converters
  • PCMCIA Power Supplies
  • PDAs and Other Handheld Devices
  • Portable Terminals
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Part Models 2
1ku List Price Starting From $1.86
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MAX1627

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Data Sheet

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UPDATED 05/27/2015
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MAX1626-MAX1627: 5V/3.3V or Adjustable, 100% Duty Cycle, High-Efficiency, Step-Down DC-DC Controllers Data Sheet (Rev.1)

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UPDATED 01/01/1900
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1236: 5V/3.3V或可调、100%占空比、高效率、降压型DC-DC控制器 Data Sheet

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UPDATED 06/01/1996
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MAX1626-MAX1627_jp: 5V/3.3Vまたは可変、100%デューティサイクル、高効率、ステップダウンDC-DCコントローラ Data Sheet (Rev.0)

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Reliability Data

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UPDATED 01/12/2023
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MAX1627 Reliability Data redirect icon

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Design Note

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UPDATED 01/07/1999
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Two AA Cells Power Step-Down Regulator and 3.3V Boost redirect icon

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UPDATED 09/11/2003
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两节AA电池供电的降压转换器和3.3V升压控制器 redirect icon

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UPDATED 01/07/1999
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2セルAAからステップダウンレギュレータおよび3.3Vブーストを駆動 redirect icon

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Documentation

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
MAX1627ESA+ Small-Outline IC, Narrow (0.15in) external-link
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MAX1627ESA+T Small-Outline IC, Narrow (0.15in) external-link
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Oct 30, 2020

- 1702R2

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MAX1627ESA+

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Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

MAX1626EVKIT

Evaluation Kit for the MAX1626, MAX1627

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MAX1626EVKIT

Evaluation Kit for the MAX1626, MAX1627

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MAX1626EVKIT
Evaluation Kit for the MAX1626, MAX1627

Features and Benefits

  • Selectable 3.3V or 5V Output Voltage
  • Low Dropout Voltage
  • 100% Max Duty Cycle
  • 2A Output Current
  • 16.5V Max Input Voltage
  • 1µA Max Shutdown Current
  • 90µA Max IC Supply Current
  • Up to 300kHz Switching Frequency
  • 8-Pin SO, Surface-Mount Construction
  • Fully Assembled and Tested
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Product Detail

The MAX1626 evaluation kit (EV kit) provides a selectable 3.3V or 5V output voltage. The MAX1626 has a high-switch duty cycle of up to 100%, allowing the external P-channel transistor to turn on fully. The 100% duty cycle and a low 100mV current-sense level permit very low dropout voltages. The circuit is configured to deliver up to 2A of output current with greater than 90% conversion efficiency.

This EV kit is a fully assembled and tested surface-mount circuit board. It can also be used to evaluate the MAX1627, which has an adjustable output voltage. Additional pads on the bottom of the board accommodate the external feedback resistors for setting different output voltages.

Evaluation Kits1

MAX1626EVKIT

Evaluation Kit for the MAX1626, MAX1627

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