LT1173
PRODUCTIONMicropower DC/DC Converter Adjustable and Fixed 5V, 12V
- Part Models
- 9
- 1ku List Price
- Starting From $3.90
Overview
- Operates at Supply Voltages From 2.0V to 30V
- Consumes Only 110µA Supply Current
- Works in Step-Up or Step-Down Mode
- Only Three External Components Required
- Low Battery Detector Comparator On-Chip
- User-Adjustable Current Limit
- Internal 1A Power Switch
- Fixed or Adjustable Output Voltage Versions
- Space Saving 8-Pin MiniDIP or SO8 Package
The LT1173 is a versatile micropower DC-DC converter. The device requires only three external components to deliver a fixed output of 5V or 12V. Supply voltage ranges from 2.0V to 12V in step-up mode and to 30V in step-down mode. The LT1173 functions equally well in step-up, step-down or inverting applications.
The LT1173 consumes just 110µA supply current at standby, making it ideal for applications where low quiescent current is important. The device can deliver 5V at 80mA from a 3V input in step-up mode or 5V at 200mA from a 12V input in step-down mode.
Switch current limit can be programmed with a single resistor. An auxiliary gain block can be configured as a low battery detector, linear post regulator, under voltage lock-out circuit or error amplifier.
For input sources of less than 2V, use the LT1073.
Applications
- Flash Memory Vpp Generators
- 3V to 5V, 5V to 12V Converters
- 9V to 5V, 12V to 5V Converters
- LCD Bias Generators
- Peripherals and Add-On Cards
- Battery Backup Supplies
- Laptop and Palmtop Computers
- Cellular Telephones
- Portable Instruments
Documentation
Data Sheet 1
Application Note 4
Design Note 3
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT1173CN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1173CN8-12#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1173CN8-5#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1173CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1173CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1173CS8-12#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1173CS8-12#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1173CS8-5#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1173CS8-5#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package |
||
| LT1173CN8#PBF | PRODUCTION | |
| LT1173CN8-12#PBF | PRODUCTION | |
| LT1173CN8-5#PBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LT1173CN8#PBF | PRODUCTION | |
| LT1173CN8-12#PBF | PRODUCTION | |
| LT1173CN8-5#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
||
| LT1173CN8#PBF | PRODUCTION | |
| LT1173CN8-12#PBF | PRODUCTION | |
| LT1173CN8-5#PBF | PRODUCTION | |
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LT1173CS8#PBF | PRODUCTION | |
| LT1173CS8#TRPBF | PRODUCTION | |
| LT1173CS8-12#PBF | PRODUCTION | |
| LT1173CS8-12#TRPBF | PRODUCTION | |
| LT1173CS8-5#PBF | PRODUCTION | |
| LT1173CS8-5#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1173CS8#PBF | PRODUCTION | |
| LT1173CS8#TRPBF | PRODUCTION | |
| LT1173CS8-12#PBF | PRODUCTION | |
| LT1173CS8-12#TRPBF | PRODUCTION | |
| LT1173CS8-5#PBF | PRODUCTION | |
| LT1173CS8-5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareTools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT1173
- LT1173-12
- LT1173-5
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.