LT1375
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LT1375

1.5A, 500kHz Step-Down Switching Regulators

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LTspice LT1375 - Switching Regulators Download 2.06 KB LTspice LT1375 Demo Circuit - 1.5A, 500kHz Step-Down Switching Regulators (6V-25V to 5V @ 1A) Download 2.00KB
Part Models 16
1ku List Price Starting From $4.01
Features
  • Constant 500kHz Switching Frequency
  • Easily Synchronizable
  • Uses All Surface Mount Components
  • Inductor Size Reduced to 5µH
  • 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 LT1375 - Switching Regulators Download 2.06 KB LTspice LT1375 Demo Circuit - 1.5A, 500kHz Step-Down Switching Regulators (6V-25V to 5V @ 1A) Download 2.00KB
Part Models 16
1ku List Price Starting From $4.01
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LT1375

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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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UPDATED 08/20/2007
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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
LT1375CN8#PBF 8-Lead PDIP (Narrow 0.3 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375CN8-5#PBF 8-Lead PDIP (Narrow 0.3 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375CS8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375CS8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375CS8-5#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375CS8-5#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375HVCS8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375HVCS8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375HVIS8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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LT1375HVIS8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375IN8#PBF 8-Lead PDIP (Narrow 0.3 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1375IN8-5#PBF 8-Lead PDIP (Narrow 0.3 Inch) external-link
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  • Material Declaration external-link
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LT1375IS8#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1375IS8#TRPBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1375IS8-5#PBF 8-Lead SOIC (Narrow 0.15 Inch) external-link
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LT1375IS8-5#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

LT1375CN8#PBF

PRODUCTION

LT1375CN8-5#PBF

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LT1375IN8#PBF

PRODUCTION

LT1375IN8-5#PBF

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PCN22_0241_Form

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Qualification Results Summary

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Aug 6, 2022

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

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PCN22_0172_Form

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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)

LT1375CS8#PBF

PRODUCTION

LT1375CS8#TRPBF

PRODUCTION

LT1375CS8-5#PBF

PRODUCTION

LT1375CS8-5#TRPBF

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LT1375HVCS8#PBF

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LT1375HVCS8#TRPBF

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LT1375HVIS8#PBF

PRODUCTION

LT1375HVIS8#TRPBF

PRODUCTION

LT1375IS8#PBF

PRODUCTION

LT1375IS8#TRPBF

PRODUCTION

LT1375IS8-5#PBF

PRODUCTION

LT1375IS8-5#TRPBF

PRODUCTION

pdf

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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Jun 11, 2021

- 21_0060

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

LT1375CS8#PBF

PRODUCTION

LT1375CS8#TRPBF

PRODUCTION

LT1375CS8-5#PBF

PRODUCTION

LT1375CS8-5#TRPBF

PRODUCTION

LT1375HVCS8#PBF

PRODUCTION

LT1375HVCS8#TRPBF

PRODUCTION

LT1375HVIS8#PBF

PRODUCTION

LT1375HVIS8#TRPBF

PRODUCTION

LT1375IS8#PBF

PRODUCTION

LT1375IS8#TRPBF

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LT1375IS8-5#PBF

PRODUCTION

LT1375IS8-5#TRPBF

PRODUCTION

pdf

PCN21_0060_Form

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Material_Report

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Delta Qualification Matrix

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PCN

Oct 11, 2022

- 22_0241

arrow down

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

LT1375CN8#PBF

PRODUCTION

LT1375CN8-5#PBF

PRODUCTION

LT1375IN8#PBF

PRODUCTION

LT1375IN8-5#PBF

PRODUCTION

pdf

PCN22_0241_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon
Aug 6, 2022

- 22_0172

arrow down

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

LT1375CN8#PBF

PRODUCTION

LT1375CN8-5#PBF

PRODUCTION

LT1375IN8#PBF

PRODUCTION

LT1375IN8-5#PBF

PRODUCTION

pdf

PCN22_0172_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)

LT1375CS8#PBF

PRODUCTION

LT1375CS8#TRPBF

PRODUCTION

LT1375CS8-5#PBF

PRODUCTION

LT1375CS8-5#TRPBF

PRODUCTION

LT1375HVCS8#PBF

PRODUCTION

LT1375HVCS8#TRPBF

PRODUCTION

LT1375HVIS8#PBF

PRODUCTION

LT1375HVIS8#TRPBF

PRODUCTION

LT1375IS8#PBF

PRODUCTION

LT1375IS8#TRPBF

PRODUCTION

LT1375IS8-5#PBF

PRODUCTION

LT1375IS8-5#TRPBF

PRODUCTION

pdf

PCN22_0255_Form

external-icon

xls

Material_Report

Download

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

LT1375CS8#PBF

PRODUCTION

LT1375CS8#TRPBF

PRODUCTION

LT1375CS8-5#PBF

PRODUCTION

LT1375CS8-5#TRPBF

PRODUCTION

LT1375HVCS8#PBF

PRODUCTION

LT1375HVCS8#TRPBF

PRODUCTION

LT1375HVIS8#PBF

PRODUCTION

LT1375HVIS8#TRPBF

PRODUCTION

LT1375IS8#PBF

PRODUCTION

LT1375IS8#TRPBF

PRODUCTION

LT1375IS8-5#PBF

PRODUCTION

LT1375IS8-5#TRPBF

PRODUCTION

pdf

PCN21_0060_Form

external-icon

xls

Material_Report

Download

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

LT1375 Demo Circuit - 1.5A, 500kHz Step-Down Switching Regulators (6V-25V to 5V @ 1A) Download

2.00K

spice tool Lt Spice

LT1375 - Switching Regulators Download

2.06 K

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