Alternative Parts


Features and Benefits

  • 40µA Supply Current
  • 125mA Output Current
  • 2.5V Reference Voltage
  • Reference Output Sources 2mA and Sinks 2mA
  • Open Collector
  • Comparator Sinks 10mA
  • Logic Shutdown
  • 0.2V Dropout Voltage
  • Thermal Limiting
  • Available in 8-Lead DIP and SO Packages

Product Details

The LT1120 is a combination micropower positive regulator and free collector comparator on a single monolithic chip. With only 40µA supply current, the LT1120 can supply over 125mA of output current. Input voltage range is from 4.5V to 36V and dropout voltage is 0.6V at 125mA. Dropout voltage decreases with lower load currents. Also included on the chip is a class B output 2.5V reference that can either source or sink current. A shutdown pin allows logic shutdown of the output.

The comparator can be used for system or battery monitoring. For example, the comparator can be used to warn of low system voltage. Frequency compensation of the comparator for amplifier applications can be obtained by adding external output capacitance.

The 2.5V reference will source or sink current. This allows it to be used as a supply splitter or auxiliary output.

No Load Quiescent Current
LT1120 80uA
LT1120A 30uA


  • Battery Systems
  • Battery-Backup System
  • Portable Terminals
  • Portable Instruments
  • Memory Keep-Alive

Product Lifecycle icon-not-recommended Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

Design Resources

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.

PCN-PDN Information

Sample & Buy

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