LT1123
Info: : PRODUCTION
searchIcon
cartIcon

LT1123

Low Dropout Regulator Driver

Show More showmore-icon

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $2.29
Features
  • Extremely Low Dropout
  • Low Cost
  • Fixed 5V Output, Trimmed to ±1%
  • 700µA Quiescent Current
  • 1mV Line Regulation
  • 5mV Load Regulation
  • Thermal Limit
  • 4A Output Current Guaranteed
  • Available in a 3-Pin TO-92 Package
Additional Details
show more Icon

The LT1123 is a 3-pin bipolar device designed to be used in conjunction with a discrete PNP power transistor to form an inexpensive low dropout regulator. The LT1123 consists of a trimmed bandgap reference, error amplifier, and a driver circuit capable of sinking up to 125mA from the base of the external PNP pass transistor. The LT1123 is designed to provide a fixed output voltage of 5V.

The drive pin of the device can pull down to 2V at 125mA (1.4V at 10mA). This allows a resistor to be used to reduce the base drive available to the PNP and minimize the power dissipation in the LT1123. The drive current of the LT1123 is folded back as the feedback pin approaches ground to further limit the available drive current under short-circuit conditions.

Total quiescent current for the LT1123 is only 700µA. The device is available in a low cost TO-92 package.

Part Models 2
1ku List Price Starting From $2.29

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT1123CST#PBF
  • HTML
  • HTML
LT1123CST#TRPBF
  • HTML
  • HTML
Software & Part Ecosystem

Software & Part Ecosystem

Recently Viewed