Top

12V/15V or Adjustable, High-Efficiency, Low-IQ, Step-Up DC-DC Converters

Internal 1A Power MOSFET Reduces Component Count and Saves Space for Flash Memory and PCMCIA Applications

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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 .

Key Features

  • High Efficiency for a Wide Range of Load Currents
  • 12V/150mA Flash Memory Programming Supply
  • 110µA Max Supply Current
  • 5µA Max Shutdown Supply Current
  • 2V to 16.5V Input Voltage Range
  • 12V (MAX761), 15V (MAX762) or Adjustable Output
  • Current-Limited PFM Control Scheme
  • 300kHz Switching Frequency
  • Internal, 1A, N-Channel Power FET
  • LBI/LBO Low-Battery Comparator

Applications/Uses

  • Battery-Powered Applications
  • Flash Memory Programming
  • High-Efficiency DC-DC Converters
  • PCMCIA Cards

Description

The MAX761/MAX762 step-up switching regulators provide high efficiency over a wide range of load currents, delivering up to 150mA. A unique, current-limited pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency with heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.

The MAX761/MAX762 input voltage range is 2V to 16.5V. Output voltages are preset to 12V (MAX761) and 15V (MAX762), or they can be set with two external resistors. With a 5V input, the MAX761 guarantees a 12V, 150mA output. Its high efficiency, low supply current, fast start-up time, SHDN controlling capability, and small size make the MAX761 ideal for powering flash memory.

The MAX761/MAX762 have an internal 1A power MOSFET, making them ideal for minimum-component, low- and medium-power applications. These devices use tiny external components, and their high switching frequencies (up to 300kHz) allow for small surface-mount magnetics.

For increased output drive capability or higher output voltages, use the MAX770-MAX773, which are similar in design to the MAX761/MAX762, but drive external power MOSFETs. For stepping up to 5V, see the MAX756/MAX757 and MAX856-MAX859 data sheets.

Simplified Block Diagram

MAX761, MAX762: Typical Operating Circuit MAX761, MAX762: 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 .