LT1120AIS8#PBF Analog Devices

SUPPLY CURRENT (mA) LT1120A Micropower Regulator with Comparator and Shutdown Fea T Descrip T n 20A Supply Current The LT 1120A is a combination micropower positive regu- n 125mA Output Current lator and free collector comparator on a single monolithic n 2.5V Reference chip. With only 20A supply current, the LT1120A can n Reference Output Sources 4mA and Sinks 4mA supply over 125mA of output current. Input voltage range n Open Collector Comparator Sinks 10mA is from 4.5V to 36V and dropout voltage is 0.6V at 125mA. n Logic Shutdown Dropout voltage decreases with lower load currents. Also n 0.2V Dropout Voltage included on the chip is a class B output 2.5V reference n Thermal Limiting that can either source or sink current. This allows it to be n 8-Lead SO Package 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- a T toring. For example, the comparator can be used to warn n Battery Systems of low system voltage. Frequency compensation of the n Battery Backup System comparator for amplifier applications can be obtained by n Portable Terminals adding external output capacitance. n Portable Instruments L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Memory Keep Alive ThinSOT is a trademark of Analog Devices, Inc. All other trademarks are the property of their respective owners. Typical a T 5V Regulator Dropout Voltage and Supply Current 1.00 10 V > 5.2V 5 4 IN V V IN OUT 5V I = 20A Q LT1120A 0.001F 1M 2 + FB GND 10F 25F 3 1 1M 1120A TA01a SHUTDOWN 0.10 1 0.01 0.1 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 1120A TA01b 1120afb 1 For more information www.linear.com/LT1120A DROPOUT VOLTAGE (V) + ion pplica ions pplica ion uresLT1120A a Te Maxi Mu M r a T (Note 1) Input Voltage .............................................................36V Operating Temperature Range NPN Collector Voltage ...............................................36V LT1120AC ............................................... 0C to 100C Output Short-Circuit Duration .......................... Indefinite LT1120AI ............................................ 40C to 100C Power Dissipation ............................... Internally Limited Storage Temperature Range .................. 65C to 150C p in c F T TOP VIEW TOP VIEW GND 1 8 INPUT GND 1 8 INPUT FEEDBACK 2 COMP OUT 7 FEEDBACK 2 7 COMP OUT SHUTDOWN 3 6 REF SHUTDOWN 3 6 REF V 4 5 V V OUT IN 4 5 V OUT IN N8 PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO T = 110C, = 130C/W T = 110C, = 190C/W JMAX JA JMAX JA o r Der i n F Ma T