LTC3813

PRODUCTION

LTC3813

100V Current Mode Synchronous Step-Up Controller

PRODUCTION

High Efﬁciency High Voltage Step-Up Converter slide

High Efﬁciency High Voltage Step-Up Converter

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Part Models 4

1ku List Price Starting From $4.48

Features

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: t_OFF(MIN) < 100ns
Adjustable Cycle-by-Cycle Current Limit
Programmable Undervoltage Lockout
Output Overvoltage Protection
28-Pin SSOP Package

Additional 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 V_IN 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

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $4.48

Technical Documents 2

LTC3813: 100V Current Mode Synchronous Step-Up Controller Data Sheet 04/21/2008

R533 Reliability Data 03/26/2018

Design Resources 4

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3813EG#PBF	28-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3813EG#TRPBF	28-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3813IG#PBF	28-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3813IG#TRPBF	28-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3813EG#PBF
Pin/Package Drawing
28-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3813EG#TRPBF
Pin/Package Drawing
28-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3813IG#PBF
Pin/Package Drawing
28-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3813IG#TRPBF
Pin/Package Drawing
28-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC3813EG#PBF

PRODUCTION

LTC3813EG#TRPBF

PRODUCTION

LTC3813IG#PBF

PRODUCTION

LTC3813IG#TRPBF

PRODUCTION

pdf

PCN22_0171_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Filter by Model

Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC3813EG#PBF

PRODUCTION

LTC3813EG#TRPBF

PRODUCTION

LTC3813IG#PBF

PRODUCTION

LTC3813IG#TRPBF

PRODUCTION

pdf

PCN22_0171_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Companion Parts 1

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Alternative Parts 5

Parts	Product Life Cycle	Description
LT3758	PRODUCTION	High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller
LTC3703	PRODUCTION	100V Synchronous Switching Regulator Controller
LTC3769	RECOMMENDED FOR NEW DESIGNS	60V Low I_Q Synchronous Boost Controller with PassThru
LTC3784	RECOMMENDED FOR NEW DESIGNS	60V PolyPhase Synchronous Boost Controller with PassThru
LTC3862	PRODUCTION	Multi-Phase Current Mode Step-Up DC/DC Controller

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.