LTC1265

PRODUCTION

1.2A, High Efficiency Step-Down DC/DC Converter

Part Models: 8
1ku List Price: Starting From $4.69

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Overview

High Efficiency: Up to 95%
Current Mode Operation for Excellent Line and Load Transient Response
Internal 0.3Ω Power Switch (V_IN = 10V)
Short-Circuit Protection
Low Dropout Operation: 100% Duty Cycle
Low-Battery Detector
Low 160µA Standby Current at Light Loads
Active-High Micropower Shutdown: I_Q < 15µA
Peak Inductor Current Independent of Inductor Value
Available in 14-pin SO Package

The LTC1265 is a monolithic step-down current mode DC/DC converter featuring Burst Mode™ operation at low output current. The LTC1265 incorporates a 0.3Ω switch (V_IN =10V) allowing up to 1.2A of output current.

Under no load condition, the converter draws only 160µA. In shutdown it typically draws a mere 5µA making this converter ideal for current sensitive applications. In dropout the internal P-channel MOSFET switch is turned on continuously maximizing the life of the battery source. The LTC1265 incorporates automatic power saving Burst Mode operation to reduce gate charge losses when the load currents drop below the level required for continuous operation.

The inductor current is user-programmable via an external current sense resistor. Operation up to 700kHz permits the use of small surface mount inductors and capacitors.

Applications

5V to 3.3V Conversion
Distributed Power Systems
Step-Down Converters
Inverting Converters
Memory Backup Supply
Portable Instruments
Battery-Powered Equipment
Cellular Telephones

Part Models: 8
1ku List Price: Starting From $4.69

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
LTC1265CS#PBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1265CS#TRPBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1265CS-3.3#PBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1265CS-3.3#TRPBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1265CS-5#PBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1265CS-5#TRPBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1265IS#PBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1265IS#TRPBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

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
LTC1265CS#PBF	PRODUCTION
LTC1265CS#TRPBF	PRODUCTION
LTC1265CS-3.3#PBF	PRODUCTION
LTC1265CS-3.3#TRPBF	PRODUCTION
LTC1265CS-5#PBF	PRODUCTION
LTC1265CS-5#TRPBF	PRODUCTION
LTC1265IS#PBF	PRODUCTION
LTC1265IS#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0251 Epoxy Change from Henkel 8290 to 8290A for 14-Lead SOIC Package
		PCN22_0251_Form Material_Report Qualification Results Summary
LTC1265CS#PBF	PRODUCTION
LTC1265CS#TRPBF	PRODUCTION
LTC1265CS-3.3#PBF	PRODUCTION
LTC1265CS-3.3#TRPBF	PRODUCTION
LTC1265CS-5#PBF	PRODUCTION
LTC1265CS-5#TRPBF	PRODUCTION
LTC1265IS#PBF	PRODUCTION
LTC1265IS#TRPBF	PRODUCTION
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]
		PCN22_0173_Form Material_Report Delta Qualification Matrix
LTC1265CS#PBF	PRODUCTION
LTC1265CS#TRPBF	PRODUCTION
LTC1265CS-3.3#PBF	PRODUCTION
LTC1265CS-3.3#TRPBF	PRODUCTION
LTC1265CS-5#PBF	PRODUCTION
LTC1265CS-5#TRPBF	PRODUCTION
LTC1265IS#PBF	PRODUCTION
LTC1265IS#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:

LTC1265
LTC1265-3.3
LTC1265-5

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.