LT1945
PRODUCTIONDual Micropower DC/DC Converter with Positive and Negative Outputs
- Part Models
- 4
- 1ku List Price
- Starting From $3.15
Overview
- Generates Well-Regulated Positive and Negative Outputs
- Low Quiescent Current:
- 20µA in Active Mode (per Converter)
- <1µA in Shutdown Mode
- Operates with VIN as Low as 1.2V
- Low VCESAT Switch: 250mV at 300mA
- Uses Small Surface Mount Components
- High Output Voltage: Up to ±34V
- Tiny 10-Pin MSOP Package
The LT1945 is a dual micropower DC/DC converter in a 10-pin MSOP package. Each converter is designed with a 350mA current limit and an input voltage range of 1.2V to 15V, making the LT1945 ideal for a wide variety of applications. Both converters feature a quiescent current of only 20µA at no load, which further reduces to 0.5µA in shutdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. The 36V switch allows high voltage outputs up to ±34V to be easily generated without the use of costly transformers. The LT1945’s low off-time of 400ns permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications.
Applications
- Small TFT LCD Panels
- Handheld Computers
- Battery Backup
- Digital Cameras
Documentation
3rd Party Solutions 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 |
|---|---|---|---|
| LT1945EMS#PBF | 10-Lead MSOP | ||
| LT1945EMS#TRPBF | 10-Lead MSOP | ||
| LT1945IMS#PBF | 10-Lead MSOP | ||
| LT1945IMS#TRPBF | 10-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
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| LT1945EMS#PBF | PRODUCTION | |
| LT1945EMS#TRPBF | PRODUCTION | |
| LT1945IMS#PBF | PRODUCTION | |
| LT1945IMS#TRPBF | PRODUCTION | |
|
Jul 12, 2022 - 22_0157 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM] |
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| LT1945EMS#PBF | PRODUCTION | |
| LT1945EMS#TRPBF | PRODUCTION | |
| LT1945IMS#PBF | PRODUCTION | |
| LT1945IMS#TRPBF | PRODUCTION | |
|
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices |
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| LT1945EMS#PBF | PRODUCTION | |
| LT1945EMS#TRPBF | PRODUCTION | |
| LT1945IMS#PBF | PRODUCTION | |
| LT1945IMS#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC |
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| LT1945EMS#PBF | PRODUCTION | |
| LT1945EMS#TRPBF | PRODUCTION | |
| LT1945IMS#PBF | PRODUCTION | |
| LT1945IMS#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice 1
Models for the following parts are available in LTspice:
- LT1945
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.