LT3669
LT3669-2

RECOMMENDED FOR NEW DESIGNS

IO-Link Transceiver with Integrated Step-Down Regulator and LDO

Data Sheet Product Selection Table

Part Models: 12
1ku List Price: Starting From $4.25

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Part Details

IO-Link^® PHY Compatible (COM1/COM2/COM3)
Cable Interface Protected to ±60V
Operation from 7.5V to 40V
Integrated Step-Down Switching Regulator
- Max Load Current: 100mA (LT3669)/300mA (LT3669-2)
- Synchronizable and Adjustable Switching Frequency: 250kHz to 2.2MHz
- Output Voltage: 0.8V to 16V
Integrated 150mA LDO Linear Regulator
Rugged Line Drivers with Adjustable Slew Rate and Current Limit
Adaptive Line Driver Pulsing Scheme to Switch Heavy Loads Safely
Drivers Configurable as Push-Pull, Pull-Up or Pull-Down
Adjustable Power-On Reset Timer
Small 28-Pin Thermally Enhanced 4mm × 5mm QFN Package

Part Models: 12
1ku List Price: Starting From $4.25

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
LT3669EUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669EUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669EUFD-2#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669EUFD-2#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669HUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669HUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669HUFD-2#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669HUFD-2#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669IUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669IUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669IUFD-2#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3669IUFD-2#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
IO-Link 1
LTC2874	PRODUCTION	Quad IO-Link Master Hot Swap Controller and PHY

Evaluation Kits

LT3669-1 Demo Board | 7.5V to 40V input with VOUT1 being 5V at 100mA and VOUT2 (LDO) being 3.3V at 100mA

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Product Details

Demonstration circuit 1733A is an industrial transceiver with integrated step-down regulator and LDO featuring the LT3669. The board operates from 7.5V to 40V when JP7 is set to L+. When the JP7 is set to RES, the minimum input voltage is 16.5V. The board withstands transients up to 60V. The step-down regulator output is 5V. The LDO output is 3.3V. There are two assembly versions. DC1733A-A is for the LT3669 and DC1733A-B is for the LT3669-2. The difference is the LT3669 has an integrated catch diode. The LT3669-2 requires an external catch diode.

Resources

DC1733A - Design Files
1.00M

DC1733A - Demo Manual
227.00K

DC1733A - Schematic
37.00K

LT3669-2 Demo Board | I/O Link with 18V to 36V Input to 4V at 300mA and 3.3V at 150mA

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Product Details

Demonstration circuit 2227A is a complete IO-Link^® device built using the LT3669-2 to implement an IO-Link v1.1 physical interface (PHY). The IO-Link stack protocol runs on an Atmel ATmega microcontroller which connects to LT3669-2’s logic IO-signals to communicate with an IO-Link master via the CQ1 transceiver.