1. Products
  2. Power Management
  3. Switching Regulators
  4. Flyback, Forward, and Isolated Controller
  5. LT1424-9


Overview

Features and Benefits

  • No Transformer “Third Winding” or Optoisolator Required
  • Application Circuit Meets PCMCIA Type II Height Requirement
  • Fixed, Application Specific 9V Output Voltage
  • Regulation Maintained Well into Discontinuous Mode (Light Load)
  • Load Compensation Provides Excellent Load Regulation
  • Available in 8-Pin PDIP and SO Packages
  • Operating Frequency: 285kHz

Product Details

The LT1424-9 is a monolithic high power switching regulator specifically designed for the isolated flyback topology. No “third winding” or optoisolator is required; the integrated circuit senses the isolated output voltage directly from the primary side flyback waveform. A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry.

The LT1424-9 operates with input supply voltages from 3V to 20V and draws only 7mA quiescent current. It can deliver up to 200mA at 9V with no external power devices. By utilizing current mode switching techniques, it provides excellent AC and DC line regulation.

The LT1424-9 has a number of features not found on other switching regulator ICs. Its unique control circuitry can maintain regulation well into discontinuous mode. Load compensation circuitry allows for improved load regulation. An externally activated shutdown mode reduces total supply current to 20µA typical for standby operation.

Applications

  • Ethernet Isolated 5V to –9V Converter

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.

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:

LT1424-5
LT1424-9

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
LT1424CN8-9#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
LT1424CS8-9#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LT1424CS8-9#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LT1424IN8-9#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
LT1424IS8-9#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LT1424IS8-9#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
Wafer Fabrication Data R387 Reliability Data

PCN-PDN Information

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Sample & Buy


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Buy Now Pricing


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List Pricing


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Lead Times


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Sampling


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