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LT1120AC Datasheet(PDF) 1 Page - Linear Technology |
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LT1120AC Datasheet(HTML) 1 Page - Linear Technology |
1 / 8 page 1 LT1120A s 20 µA Supply Current s 8-Lead SOIC s 125mA Output Current s 2.5V Reference s Reference Output Sources 4mA and Sinks 4mA s Open Collector s Comparator Sinks 10mA s Logic Shutdown s 0.2V Dropout Voltage s Thermal Limiting The LT1120A is a combination micropower positive regu- lator and free collector comparator on a single monolithic chip. With only 20 µA 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. s Battery Systems s Battery Backup System s Portable Terminals s Portable Instruments s Memory Keep Alive Micropower Regulator with Comparator and Shutdown FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION Dropout Voltage and Supply Current 5V Regulator 1120A TA01 VIN > 5.2V IQ = 20µA 10 µF 1M SHUTDOWN 1 3 54 2 0.001 µF 25 µF 1M 5V LT1120A VOUT VIN GND FB + + OUTPUT CURRENT (mA) 0.1 0.01 1.00 1 1000 1120A TA02 10 0.10 100 0.1 10 1 |
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