LTC3725

NOT RECOMMENDED FOR NEW DESIGNS

Single-Switch Forward Controller and Gate Driver

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $3.08

Viewing:

Part Details

High Speed Gate Driver for Forward Converter
On-Chip Rectifier and Self-Starting Architecture Eliminates Need for Separate Gate Drive Bias Supply
Wide Input Voltage Supply Range: 9V and Up
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 10-Lead MSOP Package

Part Models: 4
1ku List Price: Starting From $3.08

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
LTC3725EMSE#PBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3725EMSE#TRPBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3725IMSE#PBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3725IMSE#TRPBF	10-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC3725EMSE#PBF	PRODUCTION
LTC3725EMSE#TRPBF	PRODUCTION
LTC3725IMSE#PBF	PRODUCTION
LTC3725IMSE#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LTC3725EMSE#PBF	PRODUCTION
LTC3725EMSE#TRPBF	PRODUCTION
LTC3725IMSE#PBF	PRODUCTION
LTC3725IMSE#TRPBF	PRODUCTION

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

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Isolated µModule Converters 2
LTM8047	RECOMMENDED FOR NEW DESIGNS	3.1V_IN to 32V_IN Isolated μModule (Power Module) DC/DC Converter
LTM8048	RECOMMENDED FOR NEW DESIGNS	3.1V_IN to 32V_IN Isolated μModule (Power Module) DC/DC Converter with LDO Post Regulator

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

Tools & Simulations

LTspice 1

LTC3725 - Switching Regulators, LT1431 - Voltage References

Models for the following parts are available in LTspice:

LTC3725

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

LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 3.3V/50A

Buy Now View Details

Product Details

Demonstration circuit 888A-A is a high power isolated synchronous forward converter with synchronous secondary side control featuring the LTC3725 and LTC3706. When powered from a 36-72V input, a single DC888A-A provides an isolated 3.3V at 50A in a quarter-brick footprint. If higher output current is required, multiple DC888A boards may be stacked together using on-board connectors for a complete PolyPhase current sharing solution.

Resources

DC888A - Schematic
52.00K

DC888A-A - Demo Manual
1.00M

DC888A-A - Design File
1.00M

LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 12V/20A

Buy Now View Details

Product Details

Demonstration circuit 888A-C is a high power isolated synchronous forward converter with synchronous secondary side control featuring the LTC3725 and LTC3706. When powered from a 36-72V input, a single DC888A-C provides an isolated 12V at 20A in a quarter-brick footprint. If higher output current is required, multiple DC888A boards may be stacked together using on-board connectors for a complete PolyPhase current sharing solution.

Resources

DC888A - Schematic
52.00K

DC888A-C - Design File
1.00M

DC888A-C - Demo Manual
1.00M

LTC3725EMSE/LTC3726EGN Demo Board | Single-Switch Forward Converter, 36V ≤ VIN ≤ 72V, VOUT = 3.3V @ 20A

Buy Now View Details

Product Details

Demonstration circuit 1031A-B is a 36V-72Vin, synchronous forward converter featuring the LTC3725 forward converter and the LTC3726 secondary-side controller. This circuit was designed specifically to attain a high current, low ripple, synchronously rectified forward converter to efficiently power 3.3V loads at up to 20A from a typical telecom input voltage range. This circuit features secondary side control of the supply eliminating the need for an optocoupler.

Resources

DC1031A-B - Design File
1.00M

DC1031A-B - Demo Manual
534.00K

DC1031A-B - Schematic
40.00K

LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 5V/40A

Buy Now View Details

Product Details

Demonstration circuit 888A-B is a high power isolated synchronous forward converter with synchronous secondary side control featuring the LTC3725 and LTC3706. When powered from a 36-72V input, a single DC888A-B provides an isolated 5V at 40A in a quarter-brick footprint. If higher output current is required, multiple DC888A boards may be stacked together using on-board connectors for a complete PolyPhase current sharing solution.

Resources

DC888A - Schematic
52.00K

DC888A-B - Demo Manual
1.00M

DC888A-B - Design File
1.00M

LTC3725EMSE/LTC3726EGN Demo Board | Single-Switch Forward Converter, 36V ≤ VIN ≤ 72V, VOUT = 2.5V @ 20A

Buy Now View Details

Product Details

Demonstration circuit 1031A-A is a 36V-72Vin, synchronous forward converter featuring the LTC3725 forward converter and the LTC3726 secondary-side controller. This circuit was designed specifically to attain a high current, low ripple, synchronously rectified forward converter to efficiently power 2.5V loads at up to 20A from a typical telecom input voltage range. This circuit features secondary side control of the supply eliminating the need for an optocoupler.

Resources

DC1031A-A - Demo Manual
533.00K

DC1031A-A - Schematic
40.00K

DC1031A-A - Design File
1.00M

LTC3725EMSE/LTC3726EGN 1/4 Brick | 9V < VIN < 36V, VOUT: 15V/6.7A

Buy Now View Details

Product Details

DC1300A-C: Demo Board for:

LTC3725 - Single-Switch Forward Controller and Gate Driver
LTC3726 - Secondary-Side Synchronous Forward Controller

Resources

DC1300A-C - Design File
1.00M

DC1300A-C - Schematic
34.00K

DC1300A-C - Demo Manual
663.00K

LTC3725EMSE/LTC3726EGN 1/4 Brick | 9V < VIN < 36V, VOUT: 12V/8.4A

Buy Now View Details

Product Details

DC1300A-B: Demo Board for:

LTC3725 - Single-Switch Forward Controller and Gate Driver
LTC3726 - Secondary-Side Synchronous Forward Controller

Resources

DC1300A-B - Design File
1.00M

DC1300A-B - Schematic
34.00K

DC1300A-B - Demo Manual
695.00K

LTC3725EMSE/LTC3726EGN 1/8 Brick | 9V < VIN < 36V, VOUT: 12V/4A

Buy Now View Details

Product Details

DC1174A-B: Demo Board for the LTC3725 Single-Switch Forward Controller and Gate Driver and LTC3726 Secondary-Side Synchronous Forward Controller

Resources

DC1174B - Demo Manual
412.00K

DC1174A-B - Design Files
924.00K

DC1174A-B - Schematic
30.00K

LTC3725EMSE/LTC3726EGN 1/4 Brick | 9V < VIN < 36V, VOUT: 5.0V/20A

Buy Now View Details

Product Details

DC1300A-A: Demo Board for:

LTC3725 - Single-Switch Forward Controller and Gate Driver
LTC3726 - Secondary-Side Synchronous Forward Controller

Resources

DC1300A-A - Design File
1.00M

DC1300A-A - Schematic
34.00K

DC1300A-A - Demo Manual
719.00K

LTC3725EMSE/LTC3726EGN Demo Board | Single-Switch Forward Converter, 36V ≤ VIN ≤ 72V, VOUT = 5V @ 20A

Buy Now View Details

Product Details

Demonstration circuit 1031A-C is a 36V-72Vin, synchronous forward converter featuring the LTC3725 forward converter and the LTC3726 secondary-side controller. This circuit was designed specifically to attain a high current, low ripple, synchronously rectified forward converter to efficiently power 5V loads at up to 20A from a typical telecom input voltage range. This circuit features secondary side control of the supply eliminating the need for an optocoupler.