1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Up (Boost) Regulators
  5. External Power Switch Boost Controllers
  6. LTC3813


Alternative Parts

Overview

Features and Benefits

  • High Output Voltages: Up to 100V
  • Large 1Ω Gate Drivers
  • No Current Sense Resistor Required
  • Dual N-Channel MOSFET Synchronous Drive
  • ±0.5% 0.8V Voltage Reference
  • Fast Transient Response
  • Programmable Soft-Start
  • Generates 10V Driver Supply from Input Supply
  • Synchronizable to External Clock
  • Power Good Output Voltage Monitor
  • Adjustable Off-Time/Frequency: tOFF(MIN) < 100ns
  • Adjustable Cycle-by-Cycle Current Limit
  • Programmable Undervoltage Lockout
  • Output Overvoltage Protection
  • 28-Pin SSOP Package

Product Details

The LTC3813 is a synchronous step-up switching regulator controller that can generate output voltages up to 100V. The LTC3813 uses a constant off-time peak current control architecture with accurate cycle-by-cycle current limit, without requiring a sense resistor.

A precise internal reference provides ±0.5% DC accuracy. A high bandwidth (25MHz) error amplifier provides very fast line and load transient response. Large 1Ω gate drivers allow the LTC3813 to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. A shutdown pin allows the LTC3813 to be turned off, reducing the supply current to 240µA.

Applications

  • 24V Fan Supplies
  • 48V Telecom and Base Station Power Supplies
  • Networking Equipment, Servers
  • Automotive and Industrial Control Systems

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:

LTC3813

Product Recommendations

LTC3813 Companion Parts

Recommended Suggested Oscillator

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
LTC3813EG#PBF Material Declaration Reliability Data 28-Lead SSOP
LTC3813EG#TRPBF Material Declaration Reliability Data 28-Lead SSOP
LTC3813IG#PBF Material Declaration Reliability Data 28-Lead SSOP
LTC3813IG#TRPBF Material Declaration Reliability Data 28-Lead SSOP
Wafer Fabrication Data R533 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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