LT8614IUDC#PBF - 42V 4A Silent Switcher Buck | Analog Devices
MPN： LT8614IUDC#PBF ✓ 啟用中LT8614IUDC#PBF 概覽
A synchronous buck converter is a DC-DC regulator that uses integrated high-side and low-side switches to transfer energy efficiently while reducing output voltage from a higher input rail. The LT8614 belongs to the voltage-regulator hierarchy within power-management ICs and uses Analog Devices Silent Switcher architecture to control EMI emissions during high-frequency operation. Its monolithic construction helps reduce external component count and supports compact converter layouts.
The verified product data identifies operation from 3.4 V to 42 V input, 0.97 V to 41.8 V adjustable output, and up to 4 A output current. Efficiency reaches 96% at 1 MHz and 94% at 2 MHz according to the verified distributor data. Burst Mode operation provides 2.5 µA quiescent current for 12 VIN to 3 V regulation in the cited operating condition, making the device suitable for low-power and battery-influenced systems when the converter is not carrying heavy load.
The SYNC pin supports clock synchronization and selection of Burst Mode or pulse-skipping operation, while TR/SS provides soft-start and tracking functions. These features help control inrush current and coordinate multiple rails in systems where sequencing or load sharing matters. The exposed-pad QFN package supports improved heat transfer when the PCB provides adequate copper area.
Typical uses include industrial 24 V or 36 V rail conversion, telecom and networking equipment, robotics, instrumentation, and compact embedded systems. Its wide input range covers automotive-style transient headroom when designed with appropriate upstream protection, but the verified data does not establish AEC-Q100 qualification for this exact suffix.
For implementation, check the complete datasheet pinout, compensation or voltage-setting details, switch-current limits, and thermal limits against the exact LT8614IUDC#PBF ordering code. Place input and output capacitors close to their corresponding pins, provide a continuous ground path, and use the exposed pad as a thermal interface rather than an isolated copper island.
直接替換替代品，適用於 LT8614IUDC#PBF — 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。
LT8614IUDC#WTRPBF
✅ 直接替換📋 參考替代品（不在目錄中）
LT8614EUDC#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LT8614HUDC#WTRPBF
✅ 直接替換📋 參考替代品（不在目錄中）
LT8614IUDC#TRPBF
✅ 直接替換📋 參考替代品（不在目錄中）
TPS563201
✅ 直接替換📋 參考替代品（不在目錄中）
ADP2302
✅ 直接替換📋 參考替代品（不在目錄中）
LT8614IUDC#PBF 最大額定值與電氣特性
| 輸入電壓範圍 | 3.4 V to 42 V |
| 輸出電壓範圍 | 0.97 V to 41.8 V |
| 最大輸出電流 | 4 A |
| 切換頻率 | Up to 3 MHz |
| Efficiency at 1 MHz | Up to 96% |
| Efficiency at 2 MHz | Up to 94% |
| 靜態電流 | 2.5 µA in Burst Mode for 12 VIN regulating to 3 V |
| Control Architecture | Silent Switcher synchronous step-down architecture |
| 輸出配置 | Adjustable single output |
| Synchronization | SYNC pin supports clock synchronization, Burst Mode, and pulse-skipping mode |
| Soft Start and Tracking | Available through TR/SS pin |
| 封裝 | 20-lead WFQFN with exposed pad, 3 mm x 4 mm |
| 腳位數 | 20 leads including exposed pad |
| 工作溫度 | -40°C to 125°C operating junction temperature range |
| Integrated Switches | Yes, monolithic construction with integrated power switches |
| 安裝類型 | Surface Mount |
LT8614IUDC#PBF 20-lead wfqfn with exposed pad, 3 mm x 4 mm 腳位配置指南
LT8614IUDC#PBF（20-lead wfqfn with exposed pad, 3 mm x 4 mm 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： LT8614IUDC#PBF.
請參閱 資料表 以查看完整腳位配置。
典型應用
LT8614IUDC#PBF 適用於 6 應用s: Industrial 24 V Rail Conversion, Telecom and Networking Equipment, Robotics and Embedded Control Systems, Instrumentation and Test Equipment, Automotive Electrical and Battery Systems, Battery-Powered Portable Systems.
Industrial 24 V Rail Conversion
The LT8614IUDC#PBF suits industrial point-of-load conversion from a 24 V nominal rail because its verified input range extends from 3.4 V to 42 V and its adjustable output spans 0.97 V to 41.8 V. Silent Switcher architecture is useful in compact control, instrumentation, and automation equipment where conducted EMI must be controlled. Use the exposed pad as a thermal interface, place input and output capacitors close to their pins, and verify industrial transient and surge requirements upstream.
推薦
Telecom and Networking Equipment
The LT8614IUDC#PBF is a strong candidate for telecom and networking power rails that require efficient conversion at high switching frequency. The verified data cites up to 96% efficiency at 1 MHz and 94% at 2 MHz, helping reduce heat in compact equipment. Silent Switcher architecture minimizes EMI emissions, while the 4 A output rating supports local rails when thermal and inductor limits permit. Validate conducted-emissions margins and system power sequencing during prototype testing.
推薦
Robotics and Embedded Control Systems
The LT8614IUDC#PBF fits robotics and embedded control systems that need a compact 42 V-capable buck stage for motors, sensors, and logic rails. Its adjustable output allows different rail voltages, while integrated switches reduce the external power-stage component count. Silent Switcher architecture is valuable when reducing EMI around control electronics and cable-connected modules. Check ripple at sensitive loads and provide adequate copper around the exposed pad to manage self-heating.
推薦
Instrumentation and Test Equipment
The LT8614IUDC#PBF is appropriate for precision instrumentation rails where switching noise and layout-induced emissions must be controlled. Its high-frequency operation supports smaller magnetics and capacitors in compact instruments, while the adjustable output supports multiple internal voltage levels. The verified 2.5 µA Burst Mode current is useful when the instrument spends time in a low-power state. For analog front ends, measure output ripple, transient response, and conducted emissions on the final board.
推薦
Automotive Electrical and Battery Systems
The LT8614IUDC#PBF can be evaluated for 42 V-class automotive or battery-powered systems because its verified input range reaches 42 V and its synchronous topology supports efficient conversion. Silent Switcher architecture helps control EMI in systems with long wiring harnesses and sensitive electronics. However, the provided data does not confirm AEC-Q100 qualification for this exact I-grade suffix. Verify automotive qualification, load dump, reverse-battery, and transient requirements before production use.
推薦
Battery-Powered Portable Systems
The LT8614IUDC#PBF can serve as a regulated rail in portable or battery-managed equipment when the input voltage remains within its verified 3.4 V to 42 V range. Burst Mode can reduce quiescent current to the cited 2.5 µA condition, which helps conserve energy during light-load periods. The converter’s high-frequency operation reduces passive-component size, but output ripple and efficiency depend strongly on the battery source impedance and selected inductor. Confirm shutdown behavior and load-current requirements in the system.
推薦
推薦產品摘要
工程參考資料，適用於 LT8614IUDC#PBF — 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 | LT8614IUDC#WTRPBF | LT8614EUDC#PBF | LT8614HUDC#WTRPBF | TPS563201 | ADP2302 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
主要差異化特點
- Silent Switcher architecture targets lower EMI than a conventional high-current buck layout (對比TPS563201)
- High-frequency operation supports compact magnetics and capacitors (對比ADP2302)
- Wide 42 V input capability for industrial and battery-influenced rails (對比LM2596)
- Integrated switches and synchronization features reduce external control complexity (對比LT8614EUDC#PBF)
設計說明
Use the official LT8614 datasheet package drawing to place input and output capacitors close to their power terminals and maintain a short, low-loop-area high-current path. The exposed pad should be connected to the recommended ground or thermal structure and tied to adequate PCB copper; do not treat it as an isolated cosmetic pad. Because the part can switch up to 3 MHz, trace inductance and return-current discontinuities can materially affect EMI and transient behavior.
Silent Switcher architecture is intended to reduce EMI, but it does not remove the need for an EMC-focused layout. Keep the switch loop compact, route high-di/dt current through the shortest possible path, use a continuous ground reference, and follow the datasheet guidance for component placement. Validate conducted and radiated emissions with the final enclosure, cable harness, and load. Changing switching frequency or inductor values can alter the EMI profile.
The verified 4 A rating is a headline maximum, not a guarantee of continuous 4 A operation at every output voltage. Check switch conduction and switching losses, inductor copper loss, ambient temperature, exposed-pad copper area, and the PCB thermal resistance. Use the manufacturer’s current-limit and thermal information for design margin, and derate the output current when the converter operates near maximum frequency or in a sealed enclosure.
Do not substitute a generic 42 V, 4 A buck regulator solely because its headline ratings match. Verify pin names and locations, SYNC and TR/SS behavior, compensation or feedback implementation, current-limit response, switch-node layout, and exposed-pad requirements. Also confirm the I-grade suffix and temperature guarantees against the exact datasheet revision before releasing a PCB or placing a production order.
合規資訊
The verified data does not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. Automotive-grade wording appears for LT8614HUDC#WTRPBF in cross-reference results, but AEC-Q100 qualification for LT8614IUDC#PBF is not established by the provided sources.
