LTC1174

PRODUCTION

High Efficiency Step-Down and Inverting DC/DC Converter

Part Models: 23
1ku List Price: Starting From $5.17

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Overview

High Efficiency: Up to 94%
Peak Inductor Current Independent of Inductor Value
Short-Circuit Protection
Optimized for 5V to –5V Applications
Wide V_IN Range: 4V to 18.5V
Low Dropout Operation
Low-Battery Detector
Pin Selectable Current Limit
Internal 0.9Ω Power Switch: V_IN = 9V
Only Four External Components Required
130µA Standby Current
Active Low Micropower Shutdown

The LTC1174 is a simple current mode DC/DC converter ideally suited for 9V to 5V, 5V to 3.3V or 5V to –5V operation. With an internal 0.9Ω switch (at a supply voltage of 9V), the LTC1174 requires only four external components to construct a complete high efficiency DC/DC converter.

Under a no load condition the LTC1174 draws only 130μA. In shutdown, it draws a mere 1μA making this converter ideal for current sensitive applications. In dropout, the internal P-channel MOSFET switch is turned on continuously allowing the user to maximize the life of the battery source.

The maximum inductor current of the LTC1174 family is pin selectable to either 340mA or 600mA, optimizing efficiency for a wide range of applications. Operation up to 200kHz permits the use of small surface mount inductors and capacitors.

For applications requiring higher output current or ultrahigh efficiency, see the LTC1148 data sheet.

Applications

Distributed Power Systems
Step-Down Converters
Inverting Converters
Memory Backup Supply
Portable Instruments
Battery-Powered Equipment

Part Models: 23
1ku List Price: Starting From $5.17

Documentation

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
LTC1174CN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174CN8-3.3#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174CN8-5#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174CS8-3.3#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174CS8-3.3#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174CS8-5#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174CS8-5#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCN8-3.3#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCN8-5#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCS8-3.3#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCS8-3.3#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCS8-5#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVCS8-5#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVIS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174HVIS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174IN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1174IS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package
		PCN24_0234_Form Material_Report Marking Comparison
LTC1174CN8#PBF	PRODUCTION
LTC1174CN8-3.3#PBF	PRODUCTION
LTC1174CN8-5#PBF	PRODUCTION
LTC1174HVCN8#PBF	PRODUCTION
LTC1174HVCN8-3.3#PBF	PRODUCTION
LTC1174HVCN8-5#PBF	PRODUCTION
LTC1174IN8#PBF	PRODUCTION
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package
		PCN22_0241_Form Material_Report Qualification Results Summary
LTC1174CN8#PBF	PRODUCTION
LTC1174CN8-3.3#PBF	PRODUCTION
LTC1174CN8-5#PBF	PRODUCTION
LTC1174HVCN8#PBF	PRODUCTION
LTC1174HVCN8-3.3#PBF	PRODUCTION
LTC1174HVCN8-5#PBF	PRODUCTION
LTC1174IN8#PBF	PRODUCTION
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]
		PCN22_0172_Form Material_Report Delta Qualification Matrix
LTC1174CN8#PBF	PRODUCTION
LTC1174CN8-3.3#PBF	PRODUCTION
LTC1174CN8-5#PBF	PRODUCTION
LTC1174HVCN8#PBF	PRODUCTION
LTC1174HVCN8-3.3#PBF	PRODUCTION
LTC1174HVCN8-5#PBF	PRODUCTION
LTC1174IN8#PBF	PRODUCTION
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LTC1174CS8#PBF	PRODUCTION
LTC1174CS8#TRPBF	PRODUCTION
LTC1174CS8-3.3#PBF	PRODUCTION
LTC1174CS8-3.3#TRPBF	PRODUCTION
LTC1174CS8-5#PBF	PRODUCTION
LTC1174CS8-5#TRPBF	PRODUCTION
LTC1174HVCS8#PBF	PRODUCTION
LTC1174HVCS8#TRPBF	PRODUCTION
LTC1174HVCS8-3.3#PBF	PRODUCTION
LTC1174HVCS8-3.3#TRPBF	PRODUCTION
LTC1174HVCS8-5#PBF	PRODUCTION
LTC1174HVCS8-5#TRPBF	PRODUCTION
LTC1174HVIS8#PBF	PRODUCTION
LTC1174HVIS8#TRPBF	PRODUCTION
LTC1174IS8#PBF	PRODUCTION
LTC1174IS8#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1174CS8#PBF	PRODUCTION
LTC1174CS8#TRPBF	PRODUCTION
LTC1174CS8-3.3#PBF	PRODUCTION
LTC1174CS8-3.3#TRPBF	PRODUCTION
LTC1174CS8-5#PBF	PRODUCTION
LTC1174CS8-5#TRPBF	PRODUCTION
LTC1174HVCS8#PBF	PRODUCTION
LTC1174HVCS8#TRPBF	PRODUCTION
LTC1174HVCS8-3.3#PBF	PRODUCTION
LTC1174HVCS8-3.3#TRPBF	PRODUCTION
LTC1174HVCS8-5#PBF	PRODUCTION
LTC1174HVCS8-5#TRPBF	PRODUCTION
LTC1174HVIS8#PBF	PRODUCTION
LTC1174HVIS8#TRPBF	PRODUCTION
LTC1174IS8#PBF	PRODUCTION
LTC1174IS8#TRPBF	PRODUCTION
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0026_Form Material_Report Delta Qualification Matrix
LTC1174CS8#PBF	PRODUCTION
LTC1174CS8#TRPBF	PRODUCTION
LTC1174CS8-3.3#PBF	PRODUCTION
LTC1174CS8-3.3#TRPBF	PRODUCTION
LTC1174CS8-5#PBF	PRODUCTION
LTC1174CS8-5#TRPBF	PRODUCTION
LTC1174HVCS8#PBF	PRODUCTION
LTC1174HVCS8#TRPBF	PRODUCTION
LTC1174HVCS8-3.3#PBF	PRODUCTION
LTC1174HVCS8-3.3#TRPBF	PRODUCTION
LTC1174HVCS8-5#PBF	PRODUCTION
LTC1174HVCS8-5#TRPBF	PRODUCTION
LTC1174HVIS8#PBF	PRODUCTION
LTC1174HVIS8#TRPBF	PRODUCTION
LTC1174IS8#PBF	PRODUCTION
LTC1174IS8#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Circuit Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Power System Management (PSM) & Sequencers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Switching Regulators & Controllers 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC1174
LTC1174-3.3
LTC1174-5
LTC1174HV
LTC1174HV-3.3
LTC1174HV-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.