LT3669
LT3669-2
Info : RECOMMENDED FOR NEW DESIGNS
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LT3669
LT3669-2

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 12
1ku List Price Starting From $4.25
Features
  • 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
Additional Details
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The LT3669 is an industrial transceiver that includes a step-down switching regulator and a low dropout linear regulator. Wake-up detect functionality, as well as a programmable power-on reset timer are also included. The current limit and slew rate of the transmitters are externally adjustable for optimum EMC performance.

The line drivers can source/sink up to 250mA of current each or 500mA when connected together, with a minimal residual voltage of less than 2.1V. An internal adaptive pulsing scheme allows the drivers to safely switch heavy capacitive loads and incandescent bulbs. Thermal shutdown provides additional protection. Line protection of ±60V in the line interface pins allows the use of standard TVS diodes with L+ operating voltages up to 40V.

The switching regulator integrates the catch diode in LT3669 (up to 100mA load current) and requires an external catch diode in LT3669-2 (up to 300mA load current).

The LT3669 implements an IO-Link device PHY. For IO-Link master designs, see the LTC2874.

Applications

  • Industrial Sensors and Actuators
Part Models 12
1ku List Price Starting From $4.25

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3669EUFD#PBF
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LT3669HUFD#PBF
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LT3669HUFD-2#PBF
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LT3669HUFD-2#TRPBF
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LT3669IUFD#PBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

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DC1733A-A

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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DC1733A-A

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

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

Product Detail

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.

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DC2227A

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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DC2227A

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

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

Product Detail

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.

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DC1733A-B

LT3669-2 Demo Board | 7.5V to 40V input with VOUT1 being 5V at 300mA and VOUT2 (LDO) being 3.3V at 150mA

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DC1733A-B

LT3669-2 Demo Board | 7.5V to 40V input with VOUT1 being 5V at 300mA and VOUT2 (LDO) being 3.3V at 150mA

LT3669-2 Demo Board | 7.5V to 40V input with VOUT1 being 5V at 300mA and VOUT2 (LDO) being 3.3V at 150mA

Product Detail

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.

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