General Description

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.

Benefits and 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

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