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  6. LTC1266

Data Sheet
PDF
JP
User Guides
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Overview

Features and Benefits

  • Ultrahigh Efficiency: Over 95% Possible
  • Drives N-Channel MOSFET for High Current or P-Channel MOSFET for Low Dropout
  • Pin Selectable Burst Mode Operation
  • 1% Output Accuracy (LTC1266A)
  • Pin Selectable Phase of Topside Driver for Boost or Step-Down Operation
  • Wide VIN Range: 3.5V to 20V
  • On-Chip Low-Battery Detector
  • High Efficiency Maintained Over Large Current Range
  • Low 170µA Standby Current at Light Loads
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Logic Controlled Micropower Shutdown: IQ < 40µA
  • Short-Circuit Protection
  • Synchronous Switching with Nonoverlaping Gate Drives
  • Available in 16-Pin Narrow SO Package

Product Details

The LTC1266 series is a family of synchronous switching regulator controllers featuring automatic Burst Mode™ operation to maintain high efficiencies at low output currents. These devices drive external power MOSFETs at switching frequencies up to 400kHz using a constant off-time current mode architecture providing constant ripple current in the inductor. They can drive either an N-channel or a P-channel topside MOSFET.

The operating current level is user-programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 18V (20V maximum). Constant off-time architecture provides low dropout regulation limited only by the RDS(ON) of the topside MOSFET (when using the P-channel) and the resistance of the inductor and current sense resistor.

The LTC1266 series combines synchronous switching for maximum efficiency at high currents with an automatic low current operating mode, called Burst Mode operation, which reduces switching losses. Standby power is reduced to only 1mW at VIN = 5V (at IOUT = 0). Load currents in Burst Mode operation are typically 0mA to 500mA.

Applications

  • Notebook and Palmtop Computers
  • Portable Instruments
  • Cellular Telephones
  • DC Power Distribution Systems
  • GPS Systems

Product Categories

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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 (1)

Documentation & Resources

  • View All (8)
  • Data Sheets (1)
  • Reliability Data (1)
  • Application Notes (3)
  • User Guides (1)
  • Design Notes (1)
  • Technical Articles (1)
    • Document Type

    Tools & Simulations

    LTspice

    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.

    LTspice

    Models for the following parts are available in LTspice:

    LTC1266
    LTC1266-3.3
    LTC1266-5

    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
    LTC1266ACS#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266ACS#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266AIS#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266AIS#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266CS#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266CS#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266CS-3.3#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266CS-3.3#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266CS-5#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266CS-5#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266IS#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266IS#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266IS-3.3#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266IS-3.3#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266IS-5#PBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    LTC1266IS-5#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Narrow 0.15 Inch)
    Wafer Fabrication Data R245 Reliability Data

    PCN-PDN Information

    Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

    Select Model for PCN Information
    • LTC1266ACS#PBF Production
    • LTC1266ACS#TRPBF Production
    • LTC1266AIS#PBF Production
    • LTC1266AIS#TRPBF Production
    • LTC1266CS#PBF Production
    • LTC1266CS#TRPBF Production
    • LTC1266CS-3.3#PBF Production
    • LTC1266CS-3.3#TRPBF Production
    • LTC1266CS-5#PBF Production
    • LTC1266CS-5#TRPBF Production
    • LTC1266IS#PBF Production
    • LTC1266IS#TRPBF Production
    • LTC1266IS-3.3#PBF Production
    • LTC1266IS-3.3#TRPBF Production
    • LTC1266IS-5#PBF Production
    • LTC1266IS-5#TRPBF Production

    Support & Discussions

    LTC1266 Discussions

    Negative output Voltage
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    LTC1266 Contact ADI Technical Support »
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    LTC1266 Contact ADI Technical Support » LTC1266 Ask your question »

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