LT3663
Info: : PRODUCTION
searchIcon
cartIcon

LT3663

1.2A Step-Down Switching Regulator with Output Current Limit

Show More showmore-icon

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Viewing: Part Details
arrow-icon

Not the part you were looking for?

viewall Go to Product Selection Table
file View Data Sheet
Documentation View All Documentation
LTspice LT3663 - Step-Down (Buck) Regulators Download 1.66 KB LTspice LT3663 Demo Circuit - 1.5MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 3.3V @ 1.2A) Download 2.00KB LTspice LT3663-3.3 Demo Circuit - 1.0MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 3.3V @ 1.2A) Download 2.00KB LTspice LT3663-5 Demo Circuit - 1.0MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 5V @ 1.2A) Download 2.00KB
Part Models 27
1ku List Price Starting From $3.01
Features
  • Wide Input Range:
    • Operation from 7.5V to 36V
    • Overvoltage Lockout Protects Circuit through 60V Transients
  • Programmable Output Current Limit (0.4A to 1.2A)
  • 3.3V and 5V Fixed Output Voltage Options
  • Integrated Boost Diode
  • Fixed Frequency, Peak Current Mode Control
    • LT3663 fSW = 1.5MHz
    • LT3663-X fSW = 1MHZ
  • Low Switch VCESAT: 275mV at 1A
  • Internally Compensated
  • Thermal Protection
  • Thermally Enhanced 8-Pin 2mm × 3mm DFN and
Additional Details
show more Icon

The LT3663 is a current mode step-down switching regulator with programmable output current limit. The current limit accurately controls the system power dissipation and reduces the size of the power path components.

The wide operating input voltage range of 7.5V to 36V (60V transient) suits the LT3663 to a variety of input sources, including unregulated 12V wall adapters, 24V industrial supplies, and automotive power.

The LT3663 includes a low current shutdown mode, input overvoltage and undervoltage lockout, and thermal shutdown. Internal compensation and boost diode minimize the number of external exponents. 3.3V and 5V fixed output voltage versions are available.

The LT3663 is available in 8-lead DFN and MSOP packages with exposed pads for low thermal resistance.

Applications

  • Distributed Supply Regulation
  • Automotive Battery Regulation
  • Industrial Supplies
  • Wall Transformer Regulation
Show More Arrow image
file View Data Sheet
Documentation View All Documentation
LTspice LT3663 - Step-Down (Buck) Regulators Download 1.66 KB LTspice LT3663 Demo Circuit - 1.5MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 3.3V @ 1.2A) Download 2.00KB LTspice LT3663-3.3 Demo Circuit - 1.0MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 3.3V @ 1.2A) Download 2.00KB LTspice LT3663-5 Demo Circuit - 1.0MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 5V @ 1.2A) Download 2.00KB
Part Models 27
1ku List Price Starting From $3.01
modal bookmark icon

{{modalTitle}}

modal close icon

{{modalDescription}}

{{dropdownTitle}}

input down arrow
  • {{defaultSelectedText}}
    • {{#each projectNames}}
  • {{name}}
    • {{/each}} {{#if newProjectText}}
  • plus icon {{newProjectText}}
    • {{/if}}
{{#if toggleButtonDescription}}
{{toggleButtonDescription}}
{{/if}} {{#if newProjectTitle}}

{{newProjectTitle}}

{{projectNameErrorText}}

{{/if}}

LT3663

Documentation

7
overlayclose

Filters

1 Applied

mobileoverlaydownarrow
  • All
    TickIcon
  • Data Sheet
  • User Guide
  • Reliability Data
  • Technical Articles
  • All
    TickIcon
  • English
  • Japanese
resetfilter

Reset Filters

Data Sheet

2

PDF Vector

PDF

UPDATED 05/07/2013
English

LT3663: 1.2A Step-Down Switching Regulator with Output Current Limit Data Sheet

Open PDF File

redirect
345.00K
download

Download PDF

PDF Vector

PDF

UPDATED 07/04/2013
Japanese

LT3663: 出力電流制限付き1.2A降圧スイッチング・レギュレータ データシート

Open PDF File

redirect
458.00K
download

Download PDF

User Guide

2

PDF Vector

PDF

UPDATED 11/24/2009
English
DC1570A - Demo Manual redirect icon

621.00K

download

Download PDF

PDF Vector

PDF

UPDATED 09/24/2009
English
DC1419A - Demo Manual redirect icon

492.00K

download

Download PDF

Reliability Data

1

PDF Vector

PDF

UPDATED 03/26/2018
English
R530 Reliability Data redirect icon

20.92 K

download

Download PDF

Technical Articles

2

PDF Vector

HTML

UPDATED 06/01/2009
English
Supercapacitor Charger with Adjustable Output Voltage and Adjustable Charging Current Limit redirect icon

PDF Vector

HTML

UPDATED 03/01/2009
English
1.2A Monolithic Buck Regulator Shrinks Supply Size and Cost with Programmable Output Current Limit redirect icon

There are no results matching this criteria. Try resetting your filters or searching for a different term

close icon

Documentation

Technical Documents 6
show more Icon

Data Sheet 1

LT3663: 1.2A Step-Down Switching Regulator with Output Current Limit Data Sheet

Reliability Data 1

R530 Reliability Data

User Guide 2

DC1570A - Demo Manual
DC1419A - Demo Manual

Technical Articles 2

Supercapacitor Charger with Adjustable Output Voltage and Adjustable Charging Current Limit
1.2A Monolithic Buck Regulator Shrinks Supply Size and Cost with Programmable Output Current Limit

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
LT3663EDCB#TRMPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EDCB#TRPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EDCB-3.3#TRMPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EDCB-3.3#TRPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EDCB-5#TRMPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EDCB-5#TRPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EMS8E#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EMS8E#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EMS8E-3.3#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EMS8E-3.3#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EMS8E-5#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663EMS8E-5#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663HMS8E#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663HMS8E#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663HMS8E-3.3#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663HMS8E-3.3#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663HMS8E-5#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663HMS8E-5#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IDCB#TRMPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IDCB#TRPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IDCB-5#TRPBF 8-Lead DFN (2mm x 3mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IMS8E#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IMS8E#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IMS8E-3.3#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IMS8E-3.3#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IMS8E-5#PBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3663IMS8E-5#TRPBF 8-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LT3663EMS8E#PBF

PRODUCTION

LT3663EMS8E#TRPBF

PRODUCTION

LT3663EMS8E-3.3#PBF

PRODUCTION

LT3663EMS8E-3.3#TRPBF

PRODUCTION

LT3663EMS8E-5#PBF

PRODUCTION

LT3663EMS8E-5#TRPBF

PRODUCTION

LT3663HMS8E#PBF

PRODUCTION

LT3663HMS8E#TRPBF

PRODUCTION

LT3663HMS8E-3.3#PBF

PRODUCTION

LT3663HMS8E-3.3#TRPBF

PRODUCTION

LT3663HMS8E-5#PBF

PRODUCTION

LT3663HMS8E-5#TRPBF

PRODUCTION

LT3663IMS8E#PBF

PRODUCTION

LT3663IMS8E#TRPBF

PRODUCTION

LT3663IMS8E-3.3#PBF

PRODUCTION

LT3663IMS8E-3.3#TRPBF

PRODUCTION

LT3663IMS8E-5#PBF

PRODUCTION

LT3663IMS8E-5#TRPBF

PRODUCTION

pdf

PCN24_0003_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download

Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT3663EMS8E#PBF

PRODUCTION

LT3663EMS8E#TRPBF

PRODUCTION

LT3663EMS8E-3.3#PBF

PRODUCTION

LT3663EMS8E-3.3#TRPBF

PRODUCTION

LT3663EMS8E-5#PBF

PRODUCTION

LT3663EMS8E-5#TRPBF

PRODUCTION

LT3663HMS8E#PBF

PRODUCTION

LT3663HMS8E#TRPBF

PRODUCTION

LT3663HMS8E-3.3#PBF

PRODUCTION

LT3663HMS8E-3.3#TRPBF

PRODUCTION

LT3663HMS8E-5#PBF

PRODUCTION

LT3663HMS8E-5#TRPBF

PRODUCTION

LT3663IMS8E#PBF

PRODUCTION

LT3663IMS8E#TRPBF

PRODUCTION

LT3663IMS8E-3.3#PBF

PRODUCTION

LT3663IMS8E-3.3#TRPBF

PRODUCTION

LT3663IMS8E-5#PBF

PRODUCTION

LT3663IMS8E-5#TRPBF

PRODUCTION

pdf

PCN20_0128_Form

external-icon

xls

Material_Report

Download

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LT3663EMS8E#PBF

PRODUCTION

LT3663EMS8E#TRPBF

PRODUCTION

LT3663EMS8E-3.3#PBF

PRODUCTION

LT3663EMS8E-3.3#TRPBF

PRODUCTION

LT3663EMS8E-5#PBF

PRODUCTION

LT3663EMS8E-5#TRPBF

PRODUCTION

LT3663HMS8E#PBF

PRODUCTION

LT3663HMS8E#TRPBF

PRODUCTION

LT3663HMS8E-3.3#PBF

PRODUCTION

LT3663HMS8E-3.3#TRPBF

PRODUCTION

LT3663HMS8E-5#PBF

PRODUCTION

LT3663HMS8E-5#TRPBF

PRODUCTION

LT3663IMS8E#PBF

PRODUCTION

LT3663IMS8E#TRPBF

PRODUCTION

LT3663IMS8E-3.3#PBF

PRODUCTION

LT3663IMS8E-3.3#TRPBF

PRODUCTION

LT3663IMS8E-5#PBF

PRODUCTION

LT3663IMS8E-5#TRPBF

PRODUCTION

pdf

PCN24_0003_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Feb 3, 2020

- 20_0128

arrow down

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT3663EMS8E#PBF

PRODUCTION

LT3663EMS8E#TRPBF

PRODUCTION

LT3663EMS8E-3.3#PBF

PRODUCTION

LT3663EMS8E-3.3#TRPBF

PRODUCTION

LT3663EMS8E-5#PBF

PRODUCTION

LT3663EMS8E-5#TRPBF

PRODUCTION

LT3663HMS8E#PBF

PRODUCTION

LT3663HMS8E#TRPBF

PRODUCTION

LT3663HMS8E-3.3#PBF

PRODUCTION

LT3663HMS8E-3.3#TRPBF

PRODUCTION

LT3663HMS8E-5#PBF

PRODUCTION

LT3663HMS8E-5#TRPBF

PRODUCTION

LT3663IMS8E#PBF

PRODUCTION

LT3663IMS8E#TRPBF

PRODUCTION

LT3663IMS8E-3.3#PBF

PRODUCTION

LT3663IMS8E-3.3#TRPBF

PRODUCTION

LT3663IMS8E-5#PBF

PRODUCTION

LT3663IMS8E-5#TRPBF

PRODUCTION

pdf

PCN20_0128_Form

external-icon

xls

Material_Report

Download

Software & Part Ecosystem

Parts Product Life Cycle Description

Digital Power System Managers1
LTC2974
popup image
Cart

RECOMMENDED FOR NEW DESIGNS

4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement

Digital Temperature Sensors1
LTC2991
popup image
Cart

RECOMMENDED FOR NEW DESIGNS

Octal I2C Voltage, Current, and Temperature Monitor

Dual-Supply Monitors1
LTC2960
popup image
Cart

RECOMMENDED FOR NEW DESIGNS

36V Nano-Current Two-Input Voltage Monitor

Surge Stopper, Overvoltage, and Overcurrent Protection1
LT4363
popup image
Cart

RECOMMENDED FOR NEW DESIGNS

High Voltage Surge Stopper with Current Limit

Evaluation Kits 3

reference details image

DC1570A-A

LT3663EDCB-3.3 Demo Board | Adj Current Limit, 7.5V ≤ VIN ≤ 36/60V, Vout = 3.3V @ 0.6A to 1.2A

zoom

DC1570A-A

LT3663EDCB-3.3 Demo Board | Adj Current Limit, 7.5V ≤ VIN ≤ 36/60V, Vout = 3.3V @ 0.6A to 1.2A

download icon

Download

 print icon

Print
DC1570A-A
LT3663EDCB-3.3 Demo Board | Adj Current Limit, 7.5V ≤ VIN ≤ 36/60V, Vout = 3.3V @ 0.6A to 1.2A
Buy Now View Details

Product Detail

Demonstration Circuit 1570 is a 1.0MHz current mode step-down switching regulator with programmable output current limit. The current limit accurately controls the system power dissipation and reduces the size of the power path components. The demo board operates with a 7.5V to 36V (60 transients) input voltage range and provides a 3.3V output. The current limit can be set to 0.6A, 0.AV, 1A or 1.2A using jumpers J2 and J3.



Resources

pdf icon

PDF

DC1570A - Schematic Download

90.00K

pdf icon

ZIP

DC1570A - Design Files Download

640.00K

pdf icon

PDF

DC1570A - Demo Manual Download

621.00K

Show More Arrow image
reference details image

DC1570A-B

LT3663EDCB-5 Demo Board | Adj Current Limit, 7.5V ≤ VIN ≤ 36/60V, VOUT = 5V @ 0.6A to 1.2A

zoom

DC1570A-B

LT3663EDCB-5 Demo Board | Adj Current Limit, 7.5V ≤ VIN ≤ 36/60V, VOUT = 5V @ 0.6A to 1.2A

download icon

Download

 print icon

Print
DC1570A-B
LT3663EDCB-5 Demo Board | Adj Current Limit, 7.5V ≤ VIN ≤ 36/60V, VOUT = 5V @ 0.6A to 1.2A
Buy Now View Details

Product Detail

Demonstration Circuit 1570 is a 1.0MHz current mode step-down switching regulator with programmable output current limit. The current limit accurately controls the system power dissipation and reduces the size of the power path components. The demo board operates with a 7.5V to 36V (60 transients) input voltage range and provides a 5V output. The current limit can be set to 0.6A, 0.8A, 1A or 1.2A using jumpers J2 and J3.


 


Resources

pdf icon

PDF

DC1570A - Schematic Download

90.00K

pdf icon

ZIP

DC1570A - Design Files Download

640.00K

pdf icon

PDF

DC1570A - Demo Manual Download

621.00K

Show More Arrow image
reference details image

DC1419A

LT3663EDCB Demo Board | Adjustable Current Limit, 7.5V ≤ VIN ≤ 36/60V, VOUT = 3.3V or 5V @ 0.6A to 1.2A

zoom

DC1419A

LT3663EDCB Demo Board | Adjustable Current Limit, 7.5V ≤ VIN ≤ 36/60V, VOUT = 3.3V or 5V @ 0.6A to 1.2A

download icon

Download

 print icon

Print
DC1419A
LT3663EDCB Demo Board | Adjustable Current Limit, 7.5V ≤ VIN ≤ 36/60V, VOUT = 3.3V or 5V @ 0.6A to 1.2A
Buy Now View Details

Product Detail

Demonstration Circuit 1419 is a 1.5MHz current mode step-down switching regulator with programmable output current limit featuring the LT3663. The current limit accurately controls the system power dissipation and reduces the size of the power path components. The demo board operates with a 7.5V to 36V (60 transients) input voltage range. The output can be set to 3.3V or 5V using jumper J4, and the current limit can be set to 0.6V, 0.8V, 1V or 1.2V using jumpers J2 and J3.

Resources

pdf icon

ZIP

DC1419A - Design File Download

604.00K

pdf icon

PDF

DC1419A - Demo Manual Download

492.00K

pdf icon

PDF

DC1419A - Schematic Download

77.00K

Show More Arrow image

Evaluation Kits3

evaluation kit item images

DC1570A-A

LT3663EDCB-3.3 Demo Board | Adj Current Limit, 7.5V ≤ VIN ≤ 36/60V, Vout = 3.3V @ 0.6A to 1.2A
evaluation kit item images

DC1570A-B

LT3663EDCB-5 Demo Board | Adj Current Limit, 7.5V ≤ VIN ≤ 36/60V, VOUT = 5V @ 0.6A to 1.2A
evaluation kit item images

DC1419A

LT3663EDCB Demo Board | Adjustable Current Limit, 7.5V ≤ VIN ≤ 36/60V, VOUT = 3.3V or 5V @ 0.6A to 1.2A

Tools & Simulations 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.

spice tool Lt Spice

LT3663 - Step-Down (Buck) Regulators Download

1.66 K

spice tool Lt Spice

LT3663 Demo Circuit - 1.5MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 3.3V @ 1.2A) Download

2.00K

spice tool Lt Spice

LT3663-3.3 Demo Circuit - 1.0MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 3.3V @ 1.2A) Download

2.00K

spice tool Lt Spice

LT3663-5 Demo Circuit - 1.0MHz, 1.2A Step-Down Regulator with Output Current Limit (12V to 5V @ 1.2A) Download

2.00K

Recently Viewed

Part Details
Documentation
Software & Part Ecosystem
Evaluation Kit
Tools & Simulations
Latest Discussions