LTC1265: 1.2A, High Efficiency Step-Down DC/DC Converter Data Sheet8/22/2007238K
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
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 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)
Documentation & Resources
R245 Reliability Data3/22/201821 K
DC074A - Demo Manual9/24/2009189K
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|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|
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