Datasheet LT1120A (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Micropower Regulator with Comparator and Shutdown |
| Pages / Page | 14 / 1 — FeaTures. DescripTion. 20µA Supply Current. applicaTions. Typical … |
| File Format / Size | PDF / 196 Kb |
| Document Language | English |
FeaTures. DescripTion. 20µA Supply Current. applicaTions. Typical applicaTion. 5V Regulator. Dropout Voltage and Supply Current
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LT1120A Micropower Regulator with Comparator and Shutdown
FeaTures DescripTion
n
20µA 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 20µA 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.
applicaTions
The comparator can be used for system or battery moni- 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 applicaTion 5V Regulator Dropout Voltage and Supply Current
V 1.00 10 IN > 5.2V 5 4 VIN VOUT I 5V Q = 20µA LT1120A 0.001µF 1M + 2 + SUPPLY CURRENT (mA) 10µF GND FB 25µF 3 1 1M 1120A TA01a SHUTDOWN 0.10 1 DROPOUT VOLTAGE (V) 0.01 0.1 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 1120A TA01b 1120afb For more information www.linear.com/LT1120A 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Related Parts
FeaTures DescripTion
n
20µA 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 20µA 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.
applicaTions
The comparator can be used for system or battery moni- 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 applicaTion 5V Regulator Dropout Voltage and Supply Current
V 1.00 10 IN > 5.2V 5 4 VIN VOUT I 5V Q = 20µA LT1120A 0.001µF 1M + 2 + SUPPLY CURRENT (mA) 10µF GND FB 25µF 3 1 1M 1120A TA01a SHUTDOWN 0.10 1 DROPOUT VOLTAGE (V) 0.01 0.1 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 1120A TA01b 1120afb For more information www.linear.com/LT1120A 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Related Parts
