LT3669HUFD-2#TRPBF IO-Link Transceiver | Analog Devices
MPN： LT3669HUFD-2#TRPBF ✓ 啟用中LT3669HUFD-2#TRPBF 概覽
An IO-Link transceiver is a specialized industrial interface device that combines a physical-layer communication channel with sensor and actuator support. IO-Link systems use point-to-point industrial connections for communication and power between a master and compatible sensors or actuators. The LT3669-2 integrates that interface function with local power conversion, reducing the number of separate supply blocks in an industrial sensor circuit.
The LT3669-2 differs from the base LT3669 in its external power-path requirements. According to the manufacturer product page, the LT3669 integrates the catch diode and supports load current up to 100 mA, whereas the LT3669-2 requires an external catch diode and supports load current up to 300 mA. This distinction makes the -2 version appropriate when the local regulator output must deliver more current, provided the external diode and associated layout requirements are implemented correctly.
Wake-up detect functionality helps the interface recognize activity on the connected line, while the programmable power-on-reset timer provides a defined startup delay for system sequencing. These features are relevant to industrial sensors where deterministic initialization, controlled sensor energization, and robust point-to-point communication are required. The integrated step-down regulator and LDO can support local sensor-power and interface-power requirements when the board-level voltage plan and thermal limits are properly designed.
Typical IO-Link applications include proximity sensors, photoelectric sensors, pressure and temperature sensing modules, industrial actuator interfaces, and factory-automation equipment. The single-transceiver arrangement is particularly useful for compact sensor nodes that require a communication interface and regulated auxiliary power without a separate communications transceiver.
Layout and power design remain critical. Place the catch diode and energy-storage components exactly as required by the manufacturer application guidance, and verify the exposed-pad thermal path when the 300 mA version operates near its maximum documented load. The package designation uses a QFN footprint, so the PCB land pattern, exposed-pad soldering, and pin numbering should be checked against the manufacturer datasheet before release to manufacturing. This product page combines verified distributor and manufacturer information with engineering guidance for IO-Link and industrial sensor designs.
直接替換替代品，適用於 LT3669HUFD-2#TRPBF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LT3669HUFD-2#TRPBF （相同外形與佔位） — 差異在於 Package, Transceiver Configuration, Product Type, Wake-Up Detect, Power-On Reset.
LT3669HUFD-2#PBF
✅ 直接替換聯絡詢價
查看資料表 →LT3669EUFD-2#PBF
✅ 直接替換聯絡詢價
查看資料表 →LT3669IUFD#PBF
✅ 直接替換聯絡詢價
查看資料表 →LT3669HUFD#TRPBF
✅ 直接替換聯絡詢價
查看資料表 →LT3669HUFD-2#TRPBF 規格
| Product Type | IO-Link transceiver with integrated step-down regulator and LDO |
| Transceiver Configuration | 1/1 single transceiver |
| 封裝 | 28-QFN (4 mm x 5 mm) |
| 安裝類型 | Surface mount |
| Power Path | Step-down switching regulator with integrated LDO |
| LT3669-2 Load Current | Up to 300 mA |
| Base LT3669 Load Current | Up to 100 mA |
| LT3669-2 Catch Diode | External catch diode required |
| Wake-Up Detect | Supported |
| Power-On Reset Timer | Programmable |
| Industrial Interface | IO-Link |
| Product Status | LT3669-2 recommended for new designs |
| Supplier Price Reference | $5.38 starting from 1,000 units, as of 2026-10-23 |
| Distributor Unit Price Reference | $7.14 starting price, as of 2026-10-23 |
LT3669HUFD-2#TRPBF 28-qfn (4 mm x 5 mm) 腳位配置指南
LT3669HUFD-2#TRPBF（28-qfn (4 mm x 5 mm) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： LT3669HUFD-2#TRPBF.
請參閱 資料表 以查看完整腳位配置。
典型應用
LT3669HUFD-2#TRPBF 適用於 6 應用s: Industrial Proximity Sensor Interface, Photoelectric Sensor Module, Pressure and Temperature Sensor Node, Factory Automation Actuator Interface, Industrial Condition Monitoring Device, Compact Industrial Sensor Gateway.
Industrial Proximity Sensor Interface
The LT3669HUFD-2#TRPBF fits compact industrial proximity-sensor nodes because it combines a 1/1 IO-Link transceiver with local power conversion. The interface can communicate with an IO-Link master while the integrated step-down regulator and LDO supply local circuit requirements. The LT3669-2 version is documented up to 300 mA and requires an external catch diode, so it is attractive when the sensor node needs more auxiliary current than the base LT3669’s 100 mA configuration. Design the diode, layout, thermal path, and output network around the manufacturer application circuit.
推薦
Photoelectric Sensor Module
An IO-Link photoelectric sensor module benefits from integrating communications and regulated auxiliary power in one interface IC. The LT3669HUFD-2#TRPBF provides the single-transceiver path for the industrial connection and includes wake-up detect plus a programmable power-on-reset timer, helping coordinate sensor startup. The 300 mA LT3669-2 load capability can support a more demanding sensor subcircuit than the base LT3669, but the external catch diode and all switching components must follow the datasheet layout. Validate startup timing against the sensor’s output-valid requirements.
推薦
Pressure and Temperature Sensor Node
The LT3669HUFD-2#TRPBF is suitable for a compact pressure or temperature sensor node where a sensor, digital interface, and regulated local power share a limited board area. The IO-Link transceiver provides the industrial point-to-point communication path, while the integrated step-down regulator and LDO reduce the number of separate supply blocks. Wake-up detect can help the node respond to line activity, and the programmable power-on-reset timer can delay initialization until the local rail is ready. The 300 mA specification is documented, but thermal and transient performance must be checked for the actual load.
推薦
Factory Automation Actuator Interface
For factory-automation actuator modules, the LT3669HUFD-2#TRPBF can combine an IO-Link communication endpoint with a local regulated supply. The single-transceiver format is appropriate for a dedicated point-to-point actuator interface, while wake-up detect supports activity-based control signaling and the programmable reset timer provides a controlled startup interval. The LT3669-2’s verified 300 mA capability is useful for auxiliary actuator electronics, but it is not a guarantee that every load can be supplied without thermal headroom. Confirm output voltage, current transients, diode selection, and exposed-pad cooling in the final design.
推薦
Industrial Condition Monitoring Device
The LT3669HUFD-2#TRPBF can support a condition-monitoring device that combines sensing, local processing, and IO-Link connectivity. Its integrated regulator functions may simplify power partitioning in a compact module, while the programmable power-on-reset timer helps establish a repeatable startup sequence for the attached sensor electronics. The 1/1 architecture avoids unnecessary transceiver channels when only one industrial connection is required. Engineers should still verify the complete pinout, voltage limits, regulator compensation or stability requirements, and thermal behavior because those detailed values are not present in the supplied distributor snippets.
推薦
Compact Industrial Sensor Gateway
The LT3669HUFD-2#TRPBF is relevant to compact sensor gateways that need a local IO-Link endpoint and regulated power in a small QFN footprint. Its 28-QFN 4 mm by 5 mm package helps preserve PCB area, while the integrated step-down and LDO functions can reduce external supply-component count. The LT3669-2 requires an external catch diode and is documented up to 300 mA, making the power-path layout a central design consideration. Use the manufacturer datasheet for the exact pinout and application circuit, and test startup, communication timing, thermal rise, and load transients in the final gateway board.
推薦
推薦產品摘要
工程參考資料，適用於 LT3669HUFD-2#TRPBF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LT3669HUFD-2#PBF | LT3669EUFD-2#PBF | LT3669IUFD#PBF | LT3669HUFD#TRPBF |
|---|---|---|---|---|---|
| Product Type | IO-Link transceiver with integrated step-down regulator and LDO | IO-Link transceiver with integrated step-down regulator and LDO | IO-Link transceiver with integrated step-down regulator and LDO | IO-Link transceiver with integrated step-down regulator and LDO | IO-Link transceiver with integrated step-down regulator and LDO |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | QFN-28 (4x5) | QFN-28 (4x5) | QFN-28 (4x5) | QFN-28 (4x5) | QFN-28 (4x5) |
| Catch Diode | External catch diode required | External catch diode required | External catch diode required | Integrated catch diode | Integrated catch diode |
主要差異化特點
- Higher documented auxiliary load capability (對比LT3669HUFD#TRPBF)
- External catch-diode architecture (對比LT3669IUFD#PBF)
- Single-transceiver integration (對比LT3669HUFD#TRPBF)
- Tape-and-reel order configuration (對比LT3669HUFD-2#PBF)
設計說明
Treat the LT3669-2 catch diode as a required board component. The manufacturer states that the -2 version requires an external catch diode and supports load current up to 300 mA, unlike the base LT3669 with an integrated diode and up to 100 mA. Select the diode and passive network from the official datasheet, orient it exactly as shown, and verify the switching loop on the PCB. Do not assume that the QFN footprint alone makes a base LT3669 electrically interchangeable.
Follow the manufacturer’s recommended placement for the external catch diode, inductor, input/output capacitors, and exposed-pad thermal path. Keep the high-current switching loop compact and route it away from sensitive IO-Link or sensor signal paths. The verified data confirms a 28-QFN 4 mm by 5 mm package but does not provide the full pin table or layout drawing; use the official 3669fa.pdf datasheet and verify the CAD land pattern against the package drawing before fabrication.
The documented LT3669-2 load-current capability is up to 300 mA, but that value alone does not establish safe board temperature. Evaluate regulator dissipation using the actual input voltage, output voltage, load duty cycle, ambient temperature, and exposed-pad copper area. Estimated: dissipated power is approximately (VIN - VOUT) multiplied by load current, excluding control and conversion losses; use this only as an engineering estimate and compare the resulting junction-temperature margin with the datasheet limits.
Do not confuse the LT3669 and LT3669-2 power paths or assume that the 28-QFN package determines electrical compatibility. The verified product page distinguishes integrated versus external catch-diode arrangements and 100 mA versus 300 mA load capability. Also verify wake-up detect and programmable reset timing in the firmware and hardware startup sequence. Detailed supply limits, IO-Link data rate, transmitter slew rate, and temperature limits were not supplied and must be obtained from the manufacturer datasheet before release.
合規資訊
The supplied web data identifies the product as an industrial Analog Devices IO-Link transceiver and provides no verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement. Compliance fields are therefore left unknown rather than inferred. AEC-Q100 is not applicable based on the supplied industrial product description, but no automotive qualification claim is made.
