LT8357

Name: LT8357
Brand: Analog Devices
Price: 2.37 USD
Availability: InStock

RECOMMENDED FOR NEW DESIGNS

60V 2MHz Low-I_Q Boost, SEPIC and Flyback Controller

Data Sheet (Rev. A) Product Selection Table

Part Models: 8
1ku List Price: Starting From $2.37

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Overview

Wide Input Voltage Range: 3V to 60V
Low I_Q Burst Mode^® Operation: 8μA
Up to 95% Efficiency at 2MHz
±1.5% Internal 1V Voltage Reference
5V Split Gate Drive for Efficiency and EMI Optimization
100kHz to 2MHz Fixed Switching Frequency with External Clock Synchronization

Spread Spectrum Frequency Modulation for Low EMI
Accurate Enable Threshold with Hysteresis
Programmable Output Soft-Start and Tracking
Thermally-Enhanced 12-Lead MSOP Package
AEC-Q100 Qualified for Automotive Applications

Part Models: 8
1ku List Price: Starting From $2.37

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
LT8357EMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT8357EMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT8357HMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT8357HMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT8357HMSE#WPBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT8357HMSE#WTRPBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT8357JMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT8357JMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

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

Software Resources

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT8357

LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

LT8357(BOOST)
LT8357(SEPIC

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

Highest Performance, Low EMI Evaluation Board for LT8357

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Product Details

Evaluation circuit EVAL-LT8357-AZ features the LT8357 as a 200kHz low EMI and low I_Q, boost controller with a 24V output from 4.5V to 20V input. This evaluation circuit features Spread Spectrum Frequency Modulation (SSFM) and EMI filters to provide optimum EMI performance. The board also contains placeholders and an outline to attach clips for an optional EMI Shield attachment. This application circuit can output 2A (see Figure 4 Maximum Output Current vs V_IN curve in the user guide). When placed in shutdown, the converter has very low quiescent current, ideal in automotive and other battery-powered applications. PULSE SKIP and BURST modes are selectable with jumper JP1. Each user-selectable option enables low quiescent current at light load and can also be combined with SSFM operation using JP1.

The LT8357 boost controller IC operates over an input range of 3V to 60V, suitable for automotive, telecom and industrial applications. It exhibits a low quiescent current of 8μA, making it ideal for battery-operated systems. It drives a low side N-channel power MOSFET with a 5V split gate drive. The converter provides adjustable and synchronizable operation from 100kHz to 2MHz with SSFM option. At light load, either PULSE SKIP or low-ripple BURST mode can be selected to improve the efficiency. The LT8357 packs popular features such as soft-start, input undervoltage lockout, adjustable switching frequency and clock synchronization. The Power Good (PGOOD) flag indicates when the output voltage is in regulation.

The LT8357 comes in a thermally enhanced 12-lead plastic MSE package. The LT8357 data sheet gives a complete description of the part, pins, features, operation, and application information. The data sheet must be read in conjunction with the user guide for EVAL-LT8357-AZ.

Resources

EVAL-LT8357-AZ - Design Files
7/29/2021

EVAL-LT8357-AZ - Schematic
7/29/2021

EVAL-LT8357-AZ - Demo Manual (Rev.0)
8/4/2021

LT8357 Demo Board | Low IQ High Power Boost Converter

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Product Details

Demonstration circuit 2937A features the LT8357 as a 360kHz low I_Q, high power boost converter with a 48V output from 10V to 40V input. This demonstration circuit features spread spectrum frequency modulation (SSFM) and split gate driver pins for the high power, high voltage switch. The converter can output 2A and higher (see Figure 3 in the demo manual). When placed in shutdown, the converter has very low quiescent current, ideal in automotive and other battery-powered applications. Low quiescent current can be achieved with both pulse-skipping and Burst Mode^® operation as jumper selections on this demonstration circuit.

The LT8357 boost controller IC operates over an input range of 3V to 60V, suitable for automotive, telecom and industrial applications. It also exhibits a low quiescent current of 8μA, making it ideal for battery-operated systems. It drives a low side N-channel power MOSFET with a 5V split gate drive. The controller provides adjustable and synchronizable operation from 100kHz to 2MHz. At light load, either pulse-skipping or low-ripple Burst Mode operation can be selected to improve the efficiency. It also packs many popular features such as soft-start, input undervoltage lockout, adjustable frequency and clock synchronization. PGOOD indicates when the output voltage is in regulation.

The LT8357 comes in a thermally enhanced 12-lead plastic MSE package. The LT8357 data sheet gives a complete description of the part, pins, features, operation and application information. The data sheet must be read in conjunction with the demo manual for DC2937A.