LT1945

PRODUCTION

Dual Micropower DC/DC Converter with Positive and Negative Outputs

Part Models: 4
1ku List Price: Starting From $2.49

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Overview

Generates Well-Regulated Positive and Negative Outputs
Low Quiescent Current:
- 20µA in Active Mode (per Converter)
- <1µA in Shutdown Mode
Operates with V_IN as Low as 1.2V
Low V_CESAT 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

Part Models: 4
1ku List Price: Starting From $2.49

Documentation

Data Sheet 1

LT1945: Dual Micropower DC/DC Converter with Positive and Negative Outputs Data Sheet 12/02/2008

Reliability Data 1

R365 Reliability Data 03/23/2018

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	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1945EMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1945IMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1945IMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
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]
		PCN22_0157_Form Material_Report Qualification Results Summary Delta Qualification Matrix Detailed Parts List
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
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
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
		PCN20_0130_Form Material_Report
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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Tools & Simulations

LTspice 1

LT1945 Demo Circuit - Dual µPower Step-Up Converter (2.7-5V to 12V @ 20mA & -20V @ 10mA)

Models for the following parts are available in LTspice:

LT1945

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