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LT1120CJ8 Datasheet(PDF) 1 Page - Linear Technology |
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LT1120CJ8 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LT1120 1120fc TYPICAL APPLICATIO APPLICATIO S FEATURES DESCRIPTIO Micropower Regulator with Comparator and Shutdown The LT ®1120 is a combination micropower positive regu- lator and free collector comparator on a single monolithic chip. With only 40 µA supply current, the LT1120 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. 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. The 2.5V reference will source or sink current. This allows it to be used as a supply splitter or auxiliary output. s 40 µA Supply Current s 125mA Output Current s 2.5V Reference Voltage s Reference Output Sources 2mA and Sinks 2mA s Open Collector Comparator Sinks 10mA s Logic Shutdown s 0.2V Dropout Voltage s Thermal Limiting s Available in 8-Lead DIP and SO Packages s Battery Systems s Battery-Backup System s Portable Terminals s Portable Instruments s Memory Keep-Alive , LTC and LT are registered trademarks of Linear Technology Corporation. 5V Regulator Dropout Voltage and Supply Current OUTPUT CURRENT (mA) 0.1 1 0.01 0.10 1.00 0.1 1 10 10 100 1000 1120 TA02 + + VIN VOUT FB GND SHDN SHUTDOWN LT1120 4 0.001 µF1M 1M 25 µF 5V VIN > 5.2V IQ = 40µA 1120 TA01 10 µF 2 1 3 5 |
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