1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. LTC1265


Features and Benefits

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

Product Details

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 (VIN =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.


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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (3)

Tools & Simulations


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Product Recommendations

LTC1265 Companion Parts

Recommended Related Parts

Design Resources

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 Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC1265CS#PBF Material Declaration Reliability Data 14-Lead SOIC (Narrow 0.15 Inch)
LTC1265CS#TRPBF Material Declaration Reliability Data 14-Lead SOIC (Narrow 0.15 Inch)
LTC1265CS-3.3#PBF Material Declaration Reliability Data 14-Lead SOIC (Narrow 0.15 Inch)
LTC1265CS-3.3#TRPBF Material Declaration Reliability Data 14-Lead SOIC (Narrow 0.15 Inch)
LTC1265CS-5#PBF Material Declaration Reliability Data 14-Lead SOIC (Narrow 0.15 Inch)
LTC1265CS-5#TRPBF Material Declaration Reliability Data 14-Lead SOIC (Narrow 0.15 Inch)
LTC1265IS#PBF Material Declaration Reliability Data 14-Lead SOIC (Narrow 0.15 Inch)
LTC1265IS#TRPBF Material Declaration Reliability Data 14-Lead SOIC (Narrow 0.15 Inch)
Wafer Fabrication Data R245 Reliability Data

PCN-PDN Information

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Sample & Buy

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Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

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