LT1073
PRODUCTIONMicropower DC-DC Converter Adjustable and Fixed 5V, 12V
- Part Models
- 8
- 1ku List Price
- Starting From $5.08
Overview
- No Design Required
- Operates at Supply Voltages From 1.0V to 30V
- Consumes Only 95µA Supply Current
- Works in Step-Up or Step-Down Mode
- Only Three External Off-the-Shelf 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 LT1073 is a versatile micropower DC/DC converter. The device requires only three external components to deliver a fixed output of 5V or 12V. The very low minimum supply voltage of 1V allows the use of the LT1073 in applications where the primary power source is a single cell. An on-chip auxiliary gain block can function as a low-battery detector or linear post-regulator.
Average current drain of the LT1073-5 used as shown in the Typical Application circuit below is just 135µA unloaded, making it ideal for applications where long battery life is important. The circuit shown can deliver 5V at 40mA from an input as low as 1.25V and 5V at 10mA from a 1V input.
The device can easily be configured as a step-up or step-down converter, although for most step-down applications or input sources greater than 3V, the LT1173 is recommended. Switch current limiting is user-adjustable by adding a single external resistor. Unique reverse-battery protection circuitry limits reverse current to safe, nondestructive levels at reverse supply voltages up to 1.6V.
APPLICATIONS
- Pagers
- Cameras
- Single-Cell to 5V Converters
- Battery Backup Supplies
- Laptop and Palmtop Computers
- Cellular Telephones
- Portable Instruments
- 4mA to 20mA Loop Powered Instruments
- Hand-Held Inventory Computers
- Battery-Powered α, β and γ Particle Detectors
Documentation
Data Sheet 1
Application Note 5
Design Note 1
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 |
|---|---|---|---|
| LT1073CN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1073CN8-12#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1073CN8-5#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1073CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1073CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1073CS8-12#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1073CS8-5#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1073CS8-5#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 |
||
| LT1073CN8#PBF | PRODUCTION | |
| LT1073CN8-12#PBF | PRODUCTION | |
| LT1073CN8-5#PBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LT1073CN8#PBF | PRODUCTION | |
| LT1073CN8-12#PBF | PRODUCTION | |
| LT1073CN8-5#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
||
| LT1073CN8#PBF | PRODUCTION | |
| LT1073CN8-12#PBF | PRODUCTION | |
| LT1073CN8-5#PBF | PRODUCTION | |
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LT1073CS8#PBF | PRODUCTION | |
| LT1073CS8#TRPBF | PRODUCTION | |
| LT1073CS8-12#PBF | PRODUCTION | |
| LT1073CS8-5#PBF | PRODUCTION | |
| LT1073CS8-5#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1073CS8#PBF | PRODUCTION | |
| LT1073CS8#TRPBF | PRODUCTION | |
| LT1073CS8-12#PBF | PRODUCTION | |
| LT1073CS8-5#PBF | PRODUCTION | |
| LT1073CS8-5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LT1073
- LT1073-12
- LT1073-5
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.