LT3669HUFD-2#PBF - Integrated IO-Link Interface | Analog Devices
料号： LT3669HUFD-2#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.38 | $5.38 |
| 10 | $5.38 | $53.80 |
| 100 | $5.38 | $538.00 |
| 500 | $5.38 | $2,690.00 |
| 1,000 | $5.38 | $5,380.00 |
LT3669HUFD-2#PBF 概述
An IO-Link transceiver is a specialized interface IC that connects an industrial sensor or actuator to a point-to-point IO-Link master. It combines the physical communication interface with local power-management functions, reducing the number of separate components required at the sensor end of an industrial link. This device also includes wake-up detection and a programmable power-on reset timer for managed sensor power behavior.
Key features include the integrated step-down regulator, integrated LDO, IO-Link communication, wake-up detect, programmable power-on reset, and operation from a 7.5 V to 40 V interface supply. The LT3669-2 configuration is intended for designs requiring the higher 300 mA switching-regulator load capability. Its 28-QFN package is compact but requires careful layout and exposed-pad thermal management.
According to the manufacturer product page, the LT3669 and LT3669-2 are recommended for new designs. The manufacturer also identifies the LT3669-2 as requiring an external catch diode, making circuit implementation distinct from the original LT3669. The available verified source set does not provide a complete electrical limit table, pin-by-pin mapping, compliance declarations, or pricing tiers beyond the manufacturer's listed starting price.
Typical uses include proximity sensors, photoelectric sensors, industrial actuators, decentralized IO-Link sensor nodes, factory automation equipment, and other 24 V industrial sensing systems. The local regulators can power sensor electronics while the transceiver handles wake-up communication with the IO-Link master.
When designing the circuit, follow the manufacturer datasheet for the external catch diode, inductor, capacitors, exposed-pad layout, and decoupling values. Treat the 4 mm by 5 mm QFN thermal pad as a heat-spreading structure and verify copper area, via count, and temperature rise against the actual regulator dissipation.
This page combines verified manufacturer and distributor information with replacement evidence, interface guidance, and design cautions that are not consolidated on a basic distributor listing. It separates confirmed LT3669-2 differences from specifications that still require the complete datasheet or design-specific validation.
直接替换替代料： LT3669HUFD-2#PBF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LT3669HUFD-2#PBF （相同外形与封装尺寸） ——差异在于 Package, Wake-Up Detect, Product Type.
快速对比工具——选择替代料号进行并排对比：
LT3669HUFD#PBF
✅ 直接替换✓ 有现货
$3.8294 / 个
查看数据手册 →LT3669HUFD#TRPBF
✅ 直接替换✓ 有现货
$2.9079 / 个
查看数据手册 →LT3669HUFD-2#TRPBF
✅ 直接替换✓ 有现货
$5.38 / 个
查看数据手册 →LT3669HUFD-2#PBF 规格参数
| Product Type | Industrial IO-Link transceiver |
| Manufacturer | Analog Devices |
| Series | LT3669/LT3669-2 |
| Integrated Power Conversion | Step-down switching regulator and low-dropout linear regulator |
| Interface Supply Range | 7.5 V to 40 V |
| LT3669-2 Switching-Regulator Load Current | Up to 300 mA |
| LT3669 Switching-Regulator Load Current | Up to 100 mA |
| LT3669-2 Catch Diode | External catch diode required |
| LT3669 Catch Diode | Integrated catch diode |
| Wake-Up Detect | Included |
| Power-On Reset | Programmable timer |
| Transceiver Direction | Single transmitter/receiver |
| 封装 | 28-lead plastic QFN |
| Package Dimensions | 4 mm x 5 mm |
| 安装类型 | Surface mount |
| High-Temperature Package Option | -40 C to +150 C |
| Standard Package Option | -40 C to +125 C |
| New-Design Status | LT3669/LT3669-2 recommended for new designs |
| Manufacturer Starting Price | $5.38 for 1,000 units |
LT3669HUFD-2#PBF -40 c to +125 c 引脚配置指南
LT3669HUFD-2#PBF（-40 c to +125 c 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： LT3669HUFD-2#PBF.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LT3669HUFD-2#PBF 适用于 6 应用s: Industrial Proximity Sensor Nodes, Photoelectric Sensor Interfaces, IO-Link Actuator Endpoints, Factory Automation Sensor Hubs, Decentralized Industrial Control Modules, 24 V Industrial Sensing Systems.
Industrial Proximity Sensor Nodes
The LT3669HUFD-2#PBF fits industrial proximity-sensor nodes because it combines an IO-Link transceiver with a step-down regulator and LDO in one 28-QFN device. Its verified 7.5 V to 40 V interface range accommodates nominal industrial sensor environments, while the LT3669-2 switching-regulator path supports up to 300 mA. The external catch diode required by this version must be placed according to the datasheet layout. Integrating wake-up detection and programmable power-on reset helps the node manage a local sensor load without a separate interface controller. The main design trade-off is the added external diode and the need to verify regulator thermal performance.
推荐
Photoelectric Sensor Interfaces
For photoelectric sensor interfaces, the LT3669HUFD-2#PBF provides the IO-Link physical interface and local conversion functions needed by a compact industrial sensor. The verified 7.5 V to 40 V supply range covers a broad industrial input range, and the integrated switching regulator can serve loads up to 300 mA in the LT3669-2 configuration. The LDO provides a separate regulated path when the sensor architecture requires both switching and linear regulation. Because the LT3669-2 needs an external catch diode, PCB area and layout must be reserved for it. Confirm the exact regulator outputs and capacitor values in the manufacturer datasheet.
推荐
IO-Link Actuator Endpoints
The LT3669HUFD-2#PBF is suitable for actuator endpoints that need digital communication and regulated local power in a small industrial package. The IO-Link transceiver handles the point-to-point sensor or actuator interface, while the integrated step-down converter and LDO reduce the number of separate power components. The verified LT3669-2 load capability reaches 300 mA, making it more appropriate than the 100 mA LT3669 configuration when the downstream regulator load is higher. Designers must still account for the external catch diode, startup sequencing, and exposed-pad heat spreading. Verify actuator voltage, current transients, and isolation requirements before final selection.
推荐
Factory Automation Sensor Hubs
In a factory-automation sensor hub, the LT3669HUFD-2#PBF can consolidate the IO-Link interface and local power conversion while leaving the system controller to manage higher-level data. Its 7.5 V to 40 V verified interface range supports industrial wiring environments, and its integrated regulators can organize power for nearby sensor electronics. Wake-up detect and the programmable power-on reset timer are useful when the hub must control peripheral power states. The QFN-28 package helps compact the node, but its exposed pad and external catch diode require deliberate PCB layout. Validate EMC, surge protection, and cable transient requirements separately from the IC datasheet limits.
推荐
Decentralized Industrial Control Modules
The LT3669HUFD-2#PBF can support decentralized control modules that distribute power and IO-Link connectivity close to a sensor or actuator. Combining the interface, step-down regulator, and LDO in one package can reduce interconnect volume and simplify the module footprint compared with separate interface and regulator ICs. The 300 mA verified LT3669-2 switching-regulator capability provides more headroom than the 100 mA LT3669 variant. The tradeoff is that the LT3669-2 requires an external catch diode and careful exposed-pad thermal design. Use the complete datasheet to establish allowable input transients, regulator outputs, capacitor types, and layout clearances.
推荐
24 V Industrial Sensing Systems
The LT3669HUFD-2#PBF is a logical candidate for 24 V industrial sensing systems because its verified interface supply range includes 24 V. It can combine IO-Link signal handling with local regulated power for sensor circuitry, reducing the number of discrete power blocks near the field device. The LT3669-2 version supports up to 300 mA through its switching-regulator configuration, while the integrated LDO serves applications needing a linear-regulated rail. External catch-diode placement and the QFN exposed pad are critical layout items. Confirm the system’s maximum cable voltage, current consumption, ambient range, and protection requirements before releasing the PCB.
推荐
推荐产品汇总
工程参考数据： LT3669HUFD-2#PBF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LT3669HUFD#PBF | LT3669HUFD#TRPBF | LT3669HUFD-2#TRPBF |
|---|---|---|---|---|
| Package | 28-lead QFN (4 mm x 5 mm) | 28-lead QFN (4 mm x 5 mm) | 28-lead QFN (4 mm x 5 mm) | 28-lead QFN (4 mm x 5 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| IO-Link Interface | Single transmitter/receiver | Single transmitter/receiver | Single transmitter/receiver | Single transmitter/receiver |
| Integrated Power Conversion | Step-down switching regulator and LDO | Step-down switching regulator and LDO | Step-down switching regulator and LDO | Step-down switching regulator and LDO |
| High-Temperature Package Option | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C |
关键差异点
- Higher verified switching-regulator load capability （对比 LT3669HUFD#PBF)
- External catch-diode implementation （对比 LT3669HUFD#PBF)
- Same QFN-28 family footprint （对比 LT3669HUFD-2#TRPBF)
设计说明
Design the LT3669-2 regulator section around the verified requirement for an external catch diode. The original LT3669 integrates that diode, so copying an LT3669 layout without reviewing the LT3669-2 datasheet can produce incorrect switching behavior or an incomplete power path. Place the diode, inductor, input capacitor, and output capacitor using the manufacturer’s recommended topology and keep the high-current loop compact.
Treat the 28-lead QFN exposed pad as part of the thermal design. For the LT3669-2, regulator dissipation depends on input voltage, output voltage, load current, switching losses, LDO dissipation, and ambient temperature. Calculate worst-case loss from the actual design, provide a continuous copper path to the pad, use thermal vias where recommended, and verify the exposed-pad connection against the package drawing before release.
Separate the IO-Link signal path from the switching-converter current loop. Keep the catch diode, inductor, regulator capacitor, and power terminals close together, while routing the IO-Link conductors away from high-dv/dt copper and magnetic-field regions. Confirm the exposed-pad net, keepout, test points, and connector placement against the complete datasheet pinout; the provided source snippets do not provide all pin names.
Do not treat LT3669HUFD#PBF as an automatic substitute for LT3669HUFD-2#PBF. The verified family difference is material: LT3669 integrates the catch diode and is rated up to 100 mA, while LT3669-2 uses an external catch diode and supports up to 300 mA. Review current requirements, external components, startup behavior, thermal load, and pin-level differences before making a substitution.
合规信息
The supplied verified snippets identify the component as an industrial interface IC and show a QFN package, but do not explicitly provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Compliance must be confirmed from current Analog Devices documentation or the manufacturer’s material-compliance records.
