LT1120A - Micropower Regulator with Comparator and Shutdown

The LT1120A is a combination micropower positive regulator and free collector comparator on a single monolithic chip. With only 20µA supply current, the LT1120A can supply over 125mA of output current. Input voltagerange is from 4.5V to 36V and dropout voltage is 0.6V at125mA. Dropout voltage decreases with lower load currents.Also included on the chip is a class B output 2.5Vreference that can either source or sink current. This allows it to be used as a supply splitter or auxiliary output. 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 warnof low system voltage. Frequency compensation of the comparator for amplifier applications can be obtained by adding external output capacitance.

Features
  • 20uA Supply Current
  • 125mA Output Current
  • 2.5V Reference
  • Reference Output Sources 4mA and Sinks 4mA
  • Open Collector Comparator Sinks 10mA
  • Logic Shutdown
  • 0.2V Dropout Voltage
  • Thermal Limiting
  • 8-Lead SO Package
Typical Application

Applications
  • Battery Systems
  • Battery Backup System
  • Portable Terminals
  • Portable Instruments
  • Memory Keep Alive
Packaging
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LT1120ACN8#PBFN-8C$3.17$2.55
LT1120ACS8#PBFSO-8C$3.67$2.95
LT1120ACS8#TRPBFSO-8C$3.01
LT1120AIS8#PBFSO-8I$4.75$3.80
LT1120AIS8#TRPBFSO-8I$4.81$3.86
Datasheet
Reliability Data
Related Product
LT1120A - Micropower Regulator with Comparator and Shutdown
R086 Reliability Data
LT1120A Footprints and Symbols