LT1376
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LT1376

1.5A, 500kHz Step-Down Switching Regulators

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LTspice LT1376 - Step-Down (Buck) Regulators Download 2.21 KB LTspice LT1376 Demo Circuit - 1.5A, 500kHz Step-Down Switching Regulators (10V to 5V @ 1A) Download 3.00KB
Part Models 24
1ku List Price Starting From $4.01
Features
  • Constant 500kHz Switching Frequency
  • Uses All Surface Mount Components
  • Inductor Size Reduced to 5μH
  • Easily Synchronizable
  • Saturating Switch Design: 0.4Ω
  • Effective Supply Current: 2.5mA
  • Shutdown Current: 20μA
  • Cycle-by-Cycle Current Limiting
Additional Details
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The LT1375/LT1376 are 500kHz monolithic buck mode switching regulators. A 1.5A switch is included on the die along with all the necessary oscillator, control and logic circuitry. High switching frequency allows a considerable reduction in the size of external components.

The topology is current mode for fast transient response and good loop stability. Both fixed output voltage and adjustable parts are available.A special high speed bipolar process and new design techniques achieve high efficiency at high switching frequency. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch. A shutdown signal will reduce supply current to 20μA on both parts. The LT1375 can be externally synchronized from 580kHz to 900kHz with logic level inputs.

The LT1375/LT1376 fit into standard 8-pin PDIP and SO packages, as well as a fused lead 16-pin SO with much lower thermal resistance. Full cycle-by-cycle short-circuit protection and thermal shutdown are provided. Standard surface mount external parts are used, including the inductor and capacitors.

For low input voltage applications with 3.3V output, see LT1507. This is a functionally identical part that can operate with input voltages between 4.5V and 12V.

Applications

  • Portable Computers
  • Battery-Powered Systems
  • Battery Charger
  • Distributed Power
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file View Data Sheet
Documentation View All Documentation
LTspice LT1376 - Step-Down (Buck) Regulators Download 2.21 KB LTspice LT1376 Demo Circuit - 1.5A, 500kHz Step-Down Switching Regulators (10V to 5V @ 1A) Download 3.00KB
Part Models 24
1ku List Price Starting From $4.01
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LT1376

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Data Sheet

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UPDATED 08/28/2007
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LT1375/LT1376: 1.5A, 500kHz Step-Down Switching Regulators Data Sheet

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UPDATED 02/21/2008
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LT1375/LT1376: 1.5 A、500 kHz、ステップダウン・スイッチング・レギュレータ データシート

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Design Note

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UPDATED 03/26/2014
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DN100 - Dual Output Regulator Uses Only One Inductor redirect icon

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UPDATED 03/21/2014
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DN95 - Capacitor and EMI Considerations New High Frequency Switching Regulators redirect icon

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UPDATED 02/21/2008
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DN95 新型高周波スイッチング・レギュレータ用のコンデンサとEMI対策 redirect icon

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Reliability Data

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UPDATED 03/26/2018
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Documentation

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
LT1376CN8#PBF 8-Lead PDIP (Narrow 0.3 Inch) external-link
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LT1376CN8-5#PBF 8-Lead PDIP (Narrow 0.3 Inch) external-link
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LT1376CS#PBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376CS#TRPBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376CS8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376CS8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376CS8-5#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376CS8-5#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376HVCS#PBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376HVCS#TRPBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376HVCS8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376HVCS8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376HVIS#PBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376HVIS#TRPBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376HVIS8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376HVIS8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376IN8#PBF 8-Lead PDIP (Narrow 0.3 Inch) external-link
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LT1376IN8-5#PBF 8-Lead PDIP (Narrow 0.3 Inch) external-link
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LT1376IS#PBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376IS#TRPBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376IS8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376IS8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376IS8-5#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1376IS8-5#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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Oct 11, 2022

- 22_0241

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

LT1376CN8#PBF

PRODUCTION

LT1376CN8-5#PBF

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LT1376IN8#PBF

PRODUCTION

LT1376IN8-5#PBF

PRODUCTION

pdf

PCN22_0241_Form

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Material_Report

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Qualification Results Summary

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Aug 6, 2022

- 22_0172

Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

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LT1376CN8-5#PBF

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LT1376IN8#PBF

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Delta Qualification Matrix

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Oct 12, 2022

- 22_0252

Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package

LT1376CS#PBF

PRODUCTION

LT1376CS#TRPBF

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LT1376HVCS#PBF

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LT1376HVCS#TRPBF

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LT1376HVIS#PBF

PRODUCTION

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PRODUCTION

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PCN22_0252_Form

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Material_Report

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Qualification Results Summary

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Aug 6, 2022

- 22_0173

Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]

LT1376CS#PBF

PRODUCTION

LT1376CS#TRPBF

PRODUCTION

LT1376HVCS#PBF

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LT1376HVCS#TRPBF

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LT1376HVIS#PBF

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PCN22_0173_Form

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Material_Report

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Delta Qualification Matrix

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Nov 11, 2021

- 21_0060

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1376CS#PBF

PRODUCTION

LT1376CS#TRPBF

PRODUCTION

LT1376IS#PBF

PRODUCTION

LT1376IS#TRPBF

PRODUCTION

pdf

PCN21_0060_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Nov 14, 2022

- 22_0254

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)

LT1376CS8#PBF

PRODUCTION

LT1376CS8#TRPBF

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LT1376CS8-5#PBF

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LT1376CS8-5#TRPBF

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PCN22_0254_Form

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Material_Report

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Qualification Results Summary

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Delta Qualification Matrix

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Jun 11, 2021

- 21_0060

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1376CS8#PBF

PRODUCTION

LT1376CS8#TRPBF

PRODUCTION

LT1376CS8-5#PBF

PRODUCTION

LT1376CS8-5#TRPBF

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LT1376HVCS8#PBF

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LT1376HVCS8#TRPBF

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LT1376HVIS8#PBF

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LT1376IS8#PBF

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LT1376IS8#TRPBF

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LT1376IS8-5#PBF

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LT1376IS8-5#TRPBF

PRODUCTION

pdf

PCN21_0060_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Dec 14, 2023

- 22_0255

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LT1376HVCS8#PBF

PRODUCTION

LT1376HVCS8#TRPBF

PRODUCTION

LT1376HVIS8#PBF

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LT1376HVIS8#TRPBF

PRODUCTION

LT1376IS8#PBF

PRODUCTION

LT1376IS8#TRPBF

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PCN22_0255_Form

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xls

Material_Report

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pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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Oct 12, 2022

- 22_0254

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)

LT1376IS#PBF

PRODUCTION

LT1376IS#TRPBF

PRODUCTION

LT1376IS8-5#PBF

PRODUCTION

LT1376IS8-5#TRPBF

PRODUCTION

pdf

PCN22_0254_Form

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Material_Report

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pdf

Qualification Results Summary

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Delta Qualification Matrix

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PCN

Oct 11, 2022

- 22_0241

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Epoxy Change from Henkel 8290 to 8290A for PDIP Package

LT1376CN8#PBF

PRODUCTION

LT1376CN8-5#PBF

PRODUCTION

LT1376IN8#PBF

PRODUCTION

LT1376IN8-5#PBF

PRODUCTION

pdf

PCN22_0241_Form

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Material_Report

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Aug 6, 2022

- 22_0172

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Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

LT1376CN8#PBF

PRODUCTION

LT1376CN8-5#PBF

PRODUCTION

LT1376IN8#PBF

PRODUCTION

LT1376IN8-5#PBF

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pdf

PCN22_0172_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Oct 12, 2022

- 22_0252

arrow down

Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package

LT1376CS#PBF

PRODUCTION

LT1376CS#TRPBF

PRODUCTION

LT1376HVCS#PBF

PRODUCTION

LT1376HVCS#TRPBF

PRODUCTION

LT1376HVIS#PBF

PRODUCTION

LT1376HVIS#TRPBF

PRODUCTION

pdf

PCN22_0252_Form

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xls

Material_Report

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pdf

Qualification Results Summary

external-icon
Aug 6, 2022

- 22_0173

arrow down

Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]

LT1376CS#PBF

PRODUCTION

LT1376CS#TRPBF

PRODUCTION

LT1376HVCS#PBF

PRODUCTION

LT1376HVCS#TRPBF

PRODUCTION

LT1376HVIS#PBF

PRODUCTION

LT1376HVIS#TRPBF

PRODUCTION

LT1376IS#PBF

PRODUCTION

LT1376IS#TRPBF

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LT1376IS8#PBF

PRODUCTION

LT1376IS8#TRPBF

PRODUCTION

pdf

PCN22_0173_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Nov 11, 2021

- 21_0060

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Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1376CS#PBF

PRODUCTION

LT1376CS#TRPBF

PRODUCTION

LT1376IS#PBF

PRODUCTION

LT1376IS#TRPBF

PRODUCTION

pdf

PCN21_0060_Form

external-icon

xls

Material_Report

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xlsm

Delta Qualification Matrix

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Nov 14, 2022

- 22_0254

arrow down

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)

LT1376CS8#PBF

PRODUCTION

LT1376CS8#TRPBF

PRODUCTION

LT1376CS8-5#PBF

PRODUCTION

LT1376CS8-5#TRPBF

PRODUCTION

pdf

PCN22_0254_Form

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xls

Material_Report

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pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Jun 11, 2021

- 21_0060

arrow down

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1376CS8#PBF

PRODUCTION

LT1376CS8#TRPBF

PRODUCTION

LT1376CS8-5#PBF

PRODUCTION

LT1376CS8-5#TRPBF

PRODUCTION

LT1376HVCS8#PBF

PRODUCTION

LT1376HVCS8#TRPBF

PRODUCTION

LT1376HVIS8#PBF

PRODUCTION

LT1376HVIS8#TRPBF

PRODUCTION

LT1376IS8#PBF

PRODUCTION

LT1376IS8#TRPBF

PRODUCTION

LT1376IS8-5#PBF

PRODUCTION

LT1376IS8-5#TRPBF

PRODUCTION

pdf

PCN21_0060_Form

external-icon

xls

Material_Report

Download

xlsm

Delta Qualification Matrix

Download
Dec 14, 2023

- 22_0255

arrow down

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LT1376HVCS8#PBF

PRODUCTION

LT1376HVCS8#TRPBF

PRODUCTION

LT1376HVIS8#PBF

PRODUCTION

LT1376HVIS8#TRPBF

PRODUCTION

LT1376IS8#PBF

PRODUCTION

LT1376IS8#TRPBF

PRODUCTION

pdf

PCN22_0255_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Oct 12, 2022

- 22_0254

arrow down

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)

LT1376IS#PBF

PRODUCTION

LT1376IS#TRPBF

PRODUCTION

LT1376IS8-5#PBF

PRODUCTION

LT1376IS8-5#TRPBF

PRODUCTION

pdf

PCN22_0254_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download

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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

LT1376 Demo Circuit - 1.5A, 500kHz Step-Down Switching Regulators (10V to 5V @ 1A) Download

3.00K

spice tool Lt Spice

LT1376 - Step-Down (Buck) Regulators Download

2.21 K

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