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LT1120A Datasheet(PDF) 1 Page - Linear Technology |
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LT1120A Datasheet(HTML) 1 Page - Linear Technology |
1 / 8 page 1 LT1120A 1120afa s 20 µA Supply Current s 125mA Output Current s 2.5V Reference s Reference Output Sources 4mA and Sinks 4mA s Open Collector Comparator Sinks 10mA s Logic Shutdown s 0.2V Dropout Voltage s Thermal Limiting s 8-Lead SO Package The LT ®1120A is a combination micropower positive regulator and free collector comparator on a single mono- lithic 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 cur- rents. 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. Micropower Regulator with Comparator and Shutdown 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 s Battery Systems s Battery Backup System s Portable Terminals s Portable Instruments s Memory Keep Alive FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO , LTC and LT are registered trademarks of Linear Technology Corporation. |
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