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Regulated 5V USB Charge Pump with Programmable Current Limit

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Regulated 5V Output Up to 125mA
  • Indefinite Short-Circuit Protection
  • Adjustable Output Current Limit
  • No Inductors Required
  • 0.1µA Shutdown Current
  • Thermal Shutdown
  • Fault Output Indicates Overcurrent or Output Voltage Out of Regulation
  • 2.95V to 5.5V Input Voltage Range
  • 10-Pin µMAX Package

Applications/Uses

  • 3.3V to 5V Local Conversion Applications
  • Battery-Powered Applications
  • Flash Memory Supplies
  • USB Host Devices

Description

The MAX5008 charge-pump regulator generates a regulated 5V output up to 125mA with a 2.95V to 5.5V input voltage range. The device includes resistor-programmable overcurrent limit. The MAX5008 requires a minimum number of external components for normal operation. The high 1MHz switching frequency allows the use of small surface-mount ceramic capacitors.

The fault-protection circuitry limits the output current when it exceeds the limit set by an external resistor. The output current can range from 1mA to 150mA to accommodate circuit requirements. A FAULT-bar output indicates when the device is in current limit or the output is out of regulation.

A low-power shutdown mode reduces supply current to less than 1µA and places the output in a high-impedance state. The MAX5008 is offered in a space-saving 10-pin µMAX® package that is only 1.1mm high.

Simplified Block Diagram

MAX5008: Typical Operating Circuit MAX5008: 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 .