LTC3705

NOT RECOMMENDED FOR NEW DESIGNS

2-Switch Forward Controller and Gate Driver

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $3.17

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Part Details

High-Speed Top and Bottom Gate Drivers for
2-Switch Forward Converter
On-Chip Rectifier and Self-Starting Architecture
Eliminate Need for Separate Gate Drive Bias Supply
Wide Input Voltage Supply Range: 18V to 80V
Tolerant of 100V Input Voltage Transients
Linear Regulator Controller for Fast Start-Up
Precision UVLO with Adjustable Hysteresis
Overcurrent Protection
Volt-Second Limit Prevents Transformer Core Saturation
Voltage Feedforward for Fast Transient Response
Available in 16-Lead Narrow SSOP Package

Part Models: 4
1ku List Price: Starting From $3.17

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
LTC3705EGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3705EGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3705IGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3705IGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC3705EGN#PBF	PRODUCTION
LTC3705EGN#TRPBF	PRODUCTION
LTC3705IGN#PBF	PRODUCTION
LTC3705IGN#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC3705EGN#PBF	PRODUCTION
LTC3705EGN#TRPBF	PRODUCTION
LTC3705IGN#PBF	PRODUCTION
LTC3705IGN#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC3705EGN#PBF	PRODUCTION
LTC3705EGN#TRPBF	PRODUCTION
LTC3705IGN#PBF	PRODUCTION
LTC3705IGN#TRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
LTC3765	RECOMMENDED FOR NEW DESIGNS	Active Clamp Forward Controller and Gate Driver

Tools & Simulations

LTspice 1

LTC3705 - Switching Regulators, LT1431 - Voltage References

Models for the following parts are available in LTspice:

LTC3705

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

LTC3705EGN/LTC3706EGN Demo Board | Forward Converter with Secondary Side Control, 36V ≤ VIN ≤72V, VOUT = 1.5V @ 45A

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Product Details

Demonstration circuit 776 is a 36V-72V_IN, 2-switch forward converter with synchronous secondary-side control featuring the LTC3705 and LTC3706. This circuit was designed specifically to attain a high stepdown ratio power supply in one stage in order to efficiently power 1.5V loads from a typical telecom input voltage range. Isolation voltage is 1500VDC. This circuit features secondary-side control of the supply without the need of an optocoupler.

Resources

DC776A - Demo Manual
716.00K

DC776A - Design File
1.00M

DC776A - Schematic
47.00K

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