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  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
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  6. LTC1530

Data Sheet
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Overview

Features and Benefits

  • High Power Buck Converter from 5V or 3.3V Input
  • Adjustable Current Limit in S0-8 with Topside FET RDS(ON) Sensing
  • No External Sense Resistor Required
  • Hiccup Mode Current Limit Protection
  • Adjustable, Fixed 1.9V, 2.5V, 2.8V and 3.3V Output
  • All N-Channel MOSFET Synchronous Driver
  • Excellent Output Regulation: ±2% over Line, Load and Temperature Variations
  • High Efficiency: Over 95% Possible
  • Fast Transient Response
  • Fixed 300kHz Frequency Operation
  • Internal Soft-Start Circuit
  • Quiescent Current: 1mA; 45µA in Shutdown

Product Details

The LTC1530 is a high power synchronous switching regulator controller optimized for 5V to 1.3V-3.5V output applications. Its synchronous switching architecture drives two external N-channel MOSFET devices to provide high efficiency. The LTC1530 contains a precision trimmed reference and feedback system that provides worst-case output voltage regulation of ±2% over temperature, load current and line voltage shifts. Current limit circuitry senses the output current through the on-resistance of the topside N-channel MOSFET, providing an adjustable current limit without requiring an external low value sense resistor.

The LTC1530 includes a fixed frequency PWM oscillator that free runs at 300kHz, providing greater than 90% efficiency in converter designs from 1A to 20A of output current. Shutdown mode drops the LTC1530 supply current to 45µA.

The LTC1530 is specified for commercial and industrial temperature ranges and is available in the S0-8 package.

Applications

  • Power Supply for Pentium® II, AMD-K6®-2, SPARC, ALPHA and PA-RISC Microprocessors
  • High Power 5V to 1.3V-3.5V Regulators

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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

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  • Data Sheets (1)
  • Reliability Data (1)
  • Application Notes (1)
  • User Guides (1)
  • Spec Notice (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:

    LTC1530
    LTC1530-1.9
    LTC1530-2.5
    LTC1530-2.8
    LTC1530-3.3

    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
    LTC1530CS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530CS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530CS8-1.9#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530CS8-2.5#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530CS8-2.5#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530CS8-2.8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530CS8-3.3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530CS8-3.3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530IS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530IS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530IS8-1.9#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530IS8-1.9#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530IS8-2.8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530IS8-2.8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530IS8-3.3#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LTC1530IS8-3.3#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    Wafer Fabrication Data R398 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
    • LTC1530CS8#PBF Production
    • LTC1530CS8#TRPBF Production
    • LTC1530CS8-1.9#PBF Production
    • LTC1530CS8-2.5#PBF Production
    • LTC1530CS8-2.5#TRPBF Production
    • LTC1530CS8-2.8#PBF Production
    • LTC1530CS8-3.3#PBF Production
    • LTC1530CS8-3.3#TRPBF Production
    • LTC1530IS8#PBF Production
    • LTC1530IS8#TRPBF Production
    • LTC1530IS8-1.9#PBF Production
    • LTC1530IS8-1.9#TRPBF Production
    • LTC1530IS8-2.8#PBF Production
    • LTC1530IS8-2.8#TRPBF Production
    • LTC1530IS8-3.3#PBF Production
    • LTC1530IS8-3.3#TRPBF Production

    Support & Discussions

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