LT3697

PRODUCTION

USB 5V, 2.5A Output, 35V Input Buck with Cable Drop Compensation

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $3.31

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Part Details

Accurate 5V Output
Programmable Cable Drop Compensation
Programmable Output Current Limit
Adjustable Output from 5.0V to 6.1V
Dual Input Feedback Permits Regulation on Output of USB Switch
Active Load Reduces Output Overshoot
FLT Flag Indicates Overcurrent on the USB Output
1.5ms FLT Flag Delay Filters Hot Plug Events
USB Output Current Monitor
Wide Input Rage: Operation from 5V to 35V
Withstands Input Transient to 60V
2.5A Maximum Output Current
Survives Output Short to GND and Car Battery
Adjustable Switching Frequency: 300kHz to 2.2MHz
Synchronizable from 300kHz to 2.2MHz
Small, Thermally Enhanced 16-Lead MSOP Package

Part Models: 4
1ku List Price: Starting From $3.31

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
LT3697EMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3697EMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3697IMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3697IMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LT3697EMSE#PBF	PRODUCTION
LT3697EMSE#TRPBF	PRODUCTION
LT3697IMSE#PBF	PRODUCTION
LT3697IMSE#TRPBF	PRODUCTION
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
LT3697EMSE#PBF	PRODUCTION
LT3697EMSE#TRPBF	PRODUCTION
LT3697IMSE#PBF	PRODUCTION
LT3697IMSE#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LT3697EMSE#PBF	PRODUCTION
LT3697EMSE#TRPBF	PRODUCTION
LT3697IMSE#PBF	PRODUCTION
LT3697IMSE#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
Low Voltage Hot Swap Controllers 1
LTC4362-1 LTC4362-2		1.2A Overvoltage/Overcurrent Protector

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT3697

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

LT3697EMSE Demo Board | 8V ≤ VIN ≤ 35V; VOUT = 5V at 2.4A

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Product Details

Demonstration circuit 1893A is a USB 5V, 2.4A output, 35V input buck with cable drop compensation featuring the LT3697. The LT3697 is a step-down switching regulator designed to power 5V USB applications. A precise output voltage and programmable cable drop compensation maintain accurate 5V regulation at the USB socket at the end of a long cable. The circuit was designed to run at 500kHz to avoid the AM band. The demo board has an EMI filter installed. The radiated EMI performance of the board is on Figures 3 to 5, showing the circuit passes CISPR25 Class 5 with a wide margin.

Resources

DC1893A - Demo Manual
514.00K

DC1893A - Schematic
38.00K

DC1893A - Design Files
1.00M

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