LT8331
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LT8331

Low IQ Boost/SEPIC/Flyback/Inverting Converter with 0.5A, 140V Switch

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LTspice LT8331 - Step-Up (Boost) Regulators Download 2.74 KB LTspice LT8331 Demo Circuit - 48V SEPIC Converter (36-72V to 48V @ 165mA) Download 3.00KB LTspice LT8331 Demo Circuit - 120V Boost Converter (36-72V to 120V @ 60mA) Download 2.00KB
Part Models 8
1ku List Price Starting From $3.54
Features
  • Wide Input Voltage Range: 4.5V to 100V
  • Ultralow Quiescent Current and Low Ripple Burst Mode® Operation: IQ = 6µA
  • 0.5A, 140V Power Switch
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • Programmable Frequency (100kHz to 500kHz)
  • Synchronizable to an External Clock
  • BIAS Pin for Higher Efficiency
  • Programmable Undervoltage Lockout (UVLO)
  • Thermally-Enhanced High Voltage MSOP Package
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LT8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very low output currents, while keeping typical output ripple below 20mV.

The internally-compensated current mode architecture results in stable operation over a wide range of input and output voltages and programmable switching frequencies between 100kHz to 500kHz. A SYNC/MODE pin allows synchronization to an external clock. It can also be used to select between burst or pulse-skipping modes of operation. For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional features include frequency foldback and programmable soft-start for controlling inductor current during start-up.

The LT8331 is available in a thermally-enhanced MSOP package with four pins removed for high voltage spacings.

Applications

  • Industrial and Automotive
  • Telecom
  • Medical Diagnostic Equipment
  • Portable Electronics
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file View Data Sheet (Rev.C)
Documentation View All Documentation
LTspice LT8331 - Step-Up (Boost) Regulators Download 2.74 KB LTspice LT8331 Demo Circuit - 48V SEPIC Converter (36-72V to 48V @ 165mA) Download 3.00KB LTspice LT8331 Demo Circuit - 120V Boost Converter (36-72V to 120V @ 60mA) Download 2.00KB
Part Models 8
1ku List Price Starting From $3.54
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LT8331

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Data Sheet

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UPDATED 08/08/2016
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LT8331: Low IQ Boost/SEPIC/Flyback/Inverting Converter with 0.5A, 140V Switch Data Sheet (Rev.C)

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UPDATED 09/08/2016
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LT8331: 0.5A、140Vスイッチを内蔵した低静止電流の昇圧/SEPIC/フライバック/反転コンバータ データシート

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Reliability Data

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UPDATED 03/23/2018
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DC2275A - Demo Manual redirect icon

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UPDATED 11/04/2015
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Design Note 545: Monolithic Converter Delivers High Output Voltages redirect icon

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UPDATED 11/04/2015
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设计要点 545: 单片式转换器可提供高输出电压 redirect icon

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UPDATED 11/04/2015
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DN-545: 高い出力電圧に対応するモノリシック・コンバータ redirect icon

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Documentation

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2017-09-18

06:13

Simplify your high voltage DC/DC converters to save battery life

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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.

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Oct 11, 2022

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package

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Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

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Jun 5, 2024

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

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Oct 27, 2021

- 21_0154

Moisture Sensitivity Level Rating Change of LT8331, LTC3637, and LTC7000-1 with #W for MSOP Package

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Oct 11, 2022

- 22_0244

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT8331EMSE#PBF

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LT8331EMSE#TRPBF

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PCN22_0244_Form

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Material_Report

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pdf

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Apr 18, 2022

- 22_0050

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

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LT8331EMSE#TRPBF

PRODUCTION

pdf

PCN22_0050_Form

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xls

Material_Report

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pdf

Qualification Results Summary

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Delta Qualification Matrix

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Feb 4, 2020

- 20_0129

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Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

LT8331EMSE#PBF

PRODUCTION

LT8331EMSE#TRPBF

PRODUCTION

LT8331EMSE#WPBF

LT8331EMSE#WTRPBF

LT8331IMSE#PBF

PRODUCTION

LT8331IMSE#TRPBF

PRODUCTION

LT8331IMSE#WPBF

LT8331IMSE#WTRPBF

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PCN20_0129_Form

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Material_Report

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Jun 5, 2024

- 24_0003

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

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LT8331EMSE#WTRPBF

LT8331IMSE#PBF

PRODUCTION

LT8331IMSE#TRPBF

PRODUCTION

LT8331IMSE#WPBF

LT8331IMSE#WTRPBF

pdf

PCN24_0003_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 27, 2021

- 21_0154

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Moisture Sensitivity Level Rating Change of LT8331, LTC3637, and LTC7000-1 with #W for MSOP Package

LT8331EMSE#WPBF

LT8331EMSE#WTRPBF

LT8331IMSE#WPBF

LT8331IMSE#WTRPBF

pdf

PCN21_0154_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Jun 21, 2022

- 22_0050

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

LT8331IMSE#WPBF

LT8331IMSE#WTRPBF

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PCN22_0050_Form

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Material_Report

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Software & Part Ecosystem

Parts Product Life Cycle Description
LT8330
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Evaluation Kits 1

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DC2275A

LT8331 Demo Board | Boost, 10V ≤ VIN ≤ 48V, 120VOUT @ up to 80mA

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DC2275A

LT8331 Demo Board | Boost, 10V ≤ VIN ≤ 48V, 120VOUT @ up to 80mA

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DC2275A
LT8331 Demo Board | Boost, 10V ≤ VIN ≤ 48V, 120VOUT @ up to 80mA
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Product Detail

Demonstration circuit DC2275A features the LT8331 in a boost configuration. The demo circuit demonstrates small size and low component count. The boost is designed to convert a 10V to 48V source to 120V at 25mA to 80mA.

Resources

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DC2275A - Demo Manual Download

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DC2275A - Schematic Download

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DC2275A - Design Files Download

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Evaluation Kits1

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DC2275A

LT8331 Demo Board | Boost, 10V ≤ VIN ≤ 48V, 120VOUT @ up to 80mA

Tools & Simulations 2

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

LT8331 - Step-Up (Boost) Regulators Download

2.74 K

spice tool Lt Spice

LT8331 Demo Circuit - 48V SEPIC Converter (36-72V to 48V @ 165mA) Download

3.00K

spice tool Lt Spice

LT8331 Demo Circuit - 120V Boost Converter (36-72V to 120V @ 60mA) Download

2.00K

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