LT1120A

Features:

20A Supply Current
8-Lead SOIC
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


Application

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


Pinout




Specifications

Input Voltage........................................................... 36V
NPN Collector Voltage ............................................. 36V
Output Short-Circuit Duration..........................Indefinite
Power Dissipation...............................Internally Limited
Operating Temperature Range
LT1120AC..............................................0 to 100
Storage Temperature Range
    LT1120AC..........................................65 to 150


Description

The LT1120A is a combination micropower positive regu-lator and free collector comparator on a single monolithic chip. With only 20A supply current, the LT1120A 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. 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 moni-toring. 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.