LT8331
RECOMMENDED FOR NEW DESIGNSLow IQ Boost/SEPIC/Flyback/Inverting Converter with 0.5A, 140V Switch
- Part Models
- 8
- 1ku List Price
- Starting From $4.48
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 2
Video 1
Brochure 1
Analog Dialogue 1
Webcast 1
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 |
|---|---|---|---|
| LT8331EMSE#PBF | 16(12)-Lead MSOP w/ EP | ||
| LT8331EMSE#TRPBF | 16(12)-Lead MSOP w/ EP | ||
| LT8331EMSE#WPBF | 16(12)-Lead MSOP w/ EP | ||
| LT8331EMSE#WTRPBF | 16(12)-Lead MSOP w/ EP | ||
| LT8331IMSE#PBF | 16(12)-Lead MSOP w/ EP | ||
| LT8331IMSE#TRPBF | 16(12)-Lead MSOP w/ EP | ||
| LT8331IMSE#WPBF | 16(12)-Lead MSOP w/ EP | ||
| LT8331IMSE#WTRPBF | 16(12)-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
||
| LT8331EMSE#PBF | PRODUCTION | |
| LT8331EMSE#TRPBF | PRODUCTION | |
|
Apr 18, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices |
||
| LT8331EMSE#PBF | PRODUCTION | |
| LT8331EMSE#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LT8331EMSE#PBF | PRODUCTION | |
| LT8331EMSE#TRPBF | PRODUCTION | |
| LT8331EMSE#WPBF | PRODUCTION | |
| LT8331EMSE#WTRPBF | PRODUCTION | |
| LT8331IMSE#PBF | PRODUCTION | |
| LT8331IMSE#TRPBF | PRODUCTION | |
| LT8331IMSE#WPBF | PRODUCTION | |
| LT8331IMSE#WTRPBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LT8331EMSE#WPBF | PRODUCTION | |
| LT8331EMSE#WTRPBF | PRODUCTION | |
| LT8331IMSE#PBF | PRODUCTION | |
| LT8331IMSE#TRPBF | PRODUCTION | |
| LT8331IMSE#WPBF | PRODUCTION | |
| LT8331IMSE#WTRPBF | PRODUCTION | |
|
Oct 27, 2021 - 21_0154 Moisture Sensitivity Level Rating Change of LT8331, LTC3637, and LTC7000-1 with #W for MSOP Package |
||
| LT8331EMSE#WPBF | PRODUCTION | |
| LT8331EMSE#WTRPBF | PRODUCTION | |
| LT8331IMSE#WPBF | PRODUCTION | |
| LT8331IMSE#WTRPBF | PRODUCTION | |
|
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices |
||
| LT8331IMSE#WPBF | PRODUCTION | |
| LT8331IMSE#WTRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 2
- LT8331 Demo Circuit - 48V SEPIC Converter (36-72V to 48V @ 165mA)
- LT8331 Demo Circuit - 120V Boost Converter (36-72V to 120V @ 60mA)
Models for the following parts are available in LTspice:
- LT8331
LTpowerCAD 1
Design tools for the following parts are available in LTpowerCAD:
- LT8331
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.
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
