LT1120 - Micropower Regulator with Comparator and Shutdown
Features
- 40µA Supply Current
- 125mA Output Current
- 2.5V Reference Voltage
- Reference Output Sources 2mA and Sinks 2mA
- Open Collector
- Comparator Sinks 10mA
- Logic Shutdown
- 0.2V Dropout Voltage
- Thermal Limiting
- Available in 8-Lead DIP and SO Packages
Typical Application
Description
The LT1120 is a combination micropower positive regulator and free collector comparator on a single monolithic chip. With only 40µA 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 thatcan either source or sink current. A shutdown pin allows logic shutdown of the output.
The comparator can be used for system or battery monitoring. 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.
| No Load Quiescent Current |
|
| LT1120 | 80uA |
| LT1120A | 30uA |
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT1120CN8#PBF | N-8 | N | C | 05-08-1510 (N8) | Yes |
| LT1120CS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1120CS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1120IN8#PBF | N-8 | N | I | 05-08-1510 (N8) | Yes |
| LT1120IS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1120IS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT1120CN8#PBF | N-8 | C | $2.92 | $2.35 | Yes | |
| LT1120CS8#PBF | SO-8 | C | $3.42 | $2.75 | Yes | |
| LT1120CS8#TRPBF | SO-8 | C | $2.81 | Yes | ||
| LT1120IN8#PBF | N-8 | I | $3.67 | $3.00 | Yes | |
| LT1120IS8#PBF | SO-8 | I | $3.90 | $3.10 | Yes | |
| LT1120IS8#TRPBF | SO-8 | I | $3.16 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
- Battery Systems
- Battery - Backup System
- Portable Terminals
- Portable Instruments
- Memory Keep - Alive
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
