LT8333

RECOMMENDED FOR NEW DESIGNS

Low I_Q Boost/SEPIC/Inverting Converter with 3A, 40V Switch

Data Sheet (Rev. A) Product Selection Table

Part Models: 2
1ku List Price: Starting From $1.95

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Overview

Wide Input Voltage Range: 2.8V to 40V
Ultralow Quiescent Current and Low Ripple
Burst Mode^® Operation: I_Q = 9μA
3A, 40V Power Switch
Positive or Negative Output Voltage Programming with a Single Feedback Pin
Programmable Frequency (300kHz to 2MHz)
Synchronizable to an External Clock

Spread Spectrum Frequency Modulation for Low EMI
Bias Pin for Higher Efficiency
Programmable Undervoltage Lockout (UVLO)
Overcurrent and Overtemperature Protection
Thermally Enhanced 10-Lead 3mm × 3mm DFN Package

Part Models: 2
1ku List Price: Starting From $1.95

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
LT8333RDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT8333RDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report
LT8333RDD#PBF	PRODUCTION
LT8333RDD#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice 1

LT8333 - Low Iq 40V, 3A Boost/SEPIC/Inverting Converter 12V SEPIC Converter Input = 3V to 26V, Output = 12V, Iout = 1.1A @12Vin, Fsw = 2MHz

Models for the following parts are available in LTspice:

LT8333

LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

LT8333

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.

Evaluation Kits

LT8333 | Low IQ Boost/SEPIC/Inverting Converter with 3A, 40V Switch

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Product Details

Evaluation circuit EVAL-LT8333-AZ features the LT8333 in a SEPIC configuration. It operates with a switching frequency of 2MHz and is designed to convert a 3V to 26V source to 12V output. The converter can output up to 1.25A depending on the input voltage (see Figure 3 in the demo manual, maximum output current vs V_IN curve).

This evaluation circuit features Spread Spectrum Frequency Modulation (SSFM) and EMI filters to provide optimum EMI performance. This PCB layout is optimized for good EMI performance and small solution size. The evaluation board contains a selectable jumper, JP1, to aid in the selection of the desired SYNC pin mode of operation. At light load, either pulse-skipping (PULSE SKIP) or low-ripple Burst Mode^® operation (BURST) can be selected to improve the efficiency.

The LT8333 boost/SEPIC/inverting converter IC operates over an input range of 2.8V to 40V, suitable for automotive, telecom, and industrial applications. The converter provides adjustable and synchronizable operation from 300kHz to 2MHz with SSFM option. The LT8333 packs other popular features such as soft-start, bias pin, input undervoltage lockout. The IC can exhibit a low quiescent current down to 9μA in BURST mode and 1μA in shutdown, which makes it ideal for battery-operated systems. The LT8333 is assembled in a thermally enhanced 10-lead 3mm × 3mm DFN package.

The data sheet gives a complete description of the device, operation, and application information. The data sheet must be read in conjunction with the demo manual for EVAL-LT8333-AZ.

Resources

EVAL-LT8333-AZ - Design Files
12/3/2021

EVAL-LT8333-AZ - Schematic
12/3/2021

EVAL-LT8333-AZ - Demo Manual (Rev.0)
12/3/2021

LT8333 | Low IQ Boost/SEPIC Inverting Converter with 3A, 40V Switch

Buy Now View Details

Product Details

Evaluation circuit EVAL-LT8333-BZ features the LT8333 in a Boost configuration. It operates with a switching frequency of 2MHz and is designed to convert a 4.5V to 20V source to 24V output. The converter can output up to 2A depending on the input voltage (see Figure 3 in the demo manual, Maximum Output Current vs V_IN curve).

This evaluation circuit features Spread-Spectrum Frequency Modulation (SSFM) and EMI filters to provide optimum EMI performance. This PCB layout is optimized for good EMI performance and small solution size. The evaluation board contains a selectable jumper, JP1, to aid in the selection of the desired SYNC pin mode of operation. At light load, either pulse-skipping (PULSE SKIP) or low-ripple Burst Mode^® operation (BURST) can be selected to improve the efficiency.

The data sheet gives a complete description of the device, operation, and application information. The data sheet must be read in conjunction with the demo manual for EVAL-LT8333-BZ.

There is another evaluation board EVAL-LT8333-AZ featuring the LT8333 in a SEPIC configuration.