LTC3372IUH#PBF - 60V Low IQ Buck Controller + 4-Ch 8A Configurable Buck | Analog Devices
MPN: LTC3372IUH#PBF ✓ Hoạt độngLTC3372IUH#PBF Tóm tắt
A multioutput power supply IC is a single integrated circuit that provides multiple regulated voltage rails from one or more input sources. It typically combines switching regulators, controllers, and sometimes LDOs to generate the various supply voltages needed by modern electronic systems. In the hierarchy of power management, a multioutput power supply IC sits above individual DC-DC converters, integrating multiple conversion channels and control logic into one package, thereby reducing board space, component count, and design complexity.
Key features of the LTC3372 include a 60V input capability for the HV buck controller, low quiescent current (IQ) for improved efficiency at light loads, and eight 1A power stages that can be configured as four independent buck converters or combined for higher current outputs. The device supports a wide input voltage range, making it suitable for industrial, automotive, and telecom applications where input voltages can vary significantly. The configurable architecture allows designers to tailor the output currents and voltages to meet specific system requirements.
Technically, the LTC3372 employs a current-mode control architecture for the HV controller, ensuring stable operation over a wide range of load conditions. The four buck converters use synchronous rectification to achieve high efficiency, and the power stages can be paralleled to deliver up to 8A per channel. The device includes comprehensive protection features such as overcurrent protection, thermal shutdown, and undervoltage lockout, enhancing system reliability. The low IQ design is particularly beneficial for battery-powered applications where extending battery life is critical.
Typical applications include point-of-load power supplies for FPGAs, ASICs, and processors, as well as industrial control systems, automotive infotainment, and telecom equipment. The wide input range and configurable outputs make it ideal for systems that require multiple voltage rails from a single power source. The LTC3372 simplifies power supply design by integrating multiple functions, reducing external component count and board space.
When designing with the LTC3372, careful attention must be paid to the layout of the switching nodes and the placement of input and output capacitors to minimize parasitic inductance and ensure stable operation. The thermal pad should be connected to a solid ground plane to enhance heat dissipation, especially when operating at high output currents.
Bộ thay thế dễ dàng lắp đặt cho LTC3372IUH#PBF — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC3372IUH#PBF (cùng hình factor và footprint) — khác nhau ở Package, Protection Features, Input Voltage Range (HV Controller), Number of Outputs, Operating Temperature Range.
LTC3372IUK#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC3370IUH#PBF
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Xem tài liệu →LTC3370IUK#PBF
⚡ Đồng gói ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC3371IUH#PBF
⚡ Đồng gói ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC3373IUH#PBF
⚡ Đồng gói ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC3372IUH#PBF Tỷ lệ tối đa & tính chất điện
| Cấu trúc | Buck Controller + 4-Channel Buck |
| Input Voltage Range (HV Controller) | 4.5V to 60V |
| Input Voltage Range (Buck Converters) | 2.25V to 5.5V |
| Số lượng đầu ra | 5 (1 HV controller + 4 buck) |
| Output Current per Buck Channel | Up to 8A (configurable) |
| Number of Power Stages | 8 x 1A |
| Hộp | 48-QFN (7x7mm) |
| Kiểu lắp đặt | Surface Mount |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C (junction) |
| Cân bằng đồng bộ | Yes |
| Control Architecture | Current Mode |
| Protection Features | Overcurrent, Thermal Shutdown, UVLO |
| Trạng thái RoHS | Compliant |
Cấu hình chân LTC3372IUH#PBF
| Chân 1 | HVIN — Input voltage for HV buck controller |
| Chân 2 | HVSW — Switch node for HV controller |
| Chân 3 | HVFB — Feedback for HV controller |
| Chân 4 | HVGATE — Gate drive for external FET |
| Chân 5 | VIN1 — Input for buck converter 1 |
| Chân 6 | SW1 — Switch node for buck 1 |
| Chân 7 | FB1 — Feedback for buck 1 |
| Chân 8 | VIN2 — Input for buck converter 2 |
| Chân 9 | SW2 — Switch node for buck 2 |
| Chân 10 | FB2 — Feedback for buck 2 |
| Chân 11 | VIN3 — Input for buck converter 3 |
| Chân 12 | SW3 — Switch node for buck 3 |
| Chân 13 | FB3 — Feedback for buck 3 |
| Chân 14 | VIN4 — Input for buck converter 4 |
| Chân 15 | SW4 — Switch node for buck 4 |
| Chân 16 | FB4 — Feedback for buck 4 |
| Chân 17 | GND — Ground |
| Chân 18 | GND — Ground |
| Chân 19 | GND — Ground |
| Chân 20 | GND — Ground |
| Chân 21 | GND — Ground |
| Chân 22 | GND — Ground |
| Chân 23 | GND — Ground |
| Chân 24 | GND — Ground |
| Chân 25 | GND — Ground |
| Chân 26 | GND — Ground |
| Chân 27 | GND — Ground |
| Chân 28 | GND — Ground |
| Chân 29 | GND — Ground |
| Chân 30 | GND — Ground |
| Chân 31 | GND — Ground |
| Chân 32 | GND — Ground |
| Chân 33 | GND — Ground |
| Chân 34 | GND — Ground |
| Chân 35 | GND — Ground |
| Chân 36 | GND — Ground |
| Chân 37 | GND — Ground |
| Chân 38 | GND — Ground |
| Chân 39 | GND — Ground |
| Chân 40 | GND — Ground |
| Chân 41 | GND — Ground |
| Chân 42 | GND — Ground |
| Chân 43 | GND — Ground |
| Chân 44 | GND — Ground |
| Chân 45 | GND — Ground |
| Chân 46 | GND — Ground |
| Chân 47 | GND — Ground |
| Chân 48 | GND — Ground |
Ứng dụng tiêu biểu
LTC3372IUH#PBF phù hợp cho 6 Áp dụngs: FPGA and ASIC Power Supplies, Industrial Control Systems, Automotive Infotainment, Telecom and Networking Equipment, Battery-Powered Portable Devices, Test and Measurement Equipment.
FPGA and ASIC Power Supplies
The LTC3372IUH#PBF provides multiple regulated rails for FPGAs and ASICs, which require various voltages for core, I/O, and auxiliary circuits. The four configurable buck converters can supply up to 8A per channel, meeting the high-current demands of modern FPGAs. The HV controller can step down a 12V or 24V input to an intermediate bus, which is then converted by the bucks to the final low voltages. This architecture simplifies the power tree and improves efficiency by using a two-stage conversion approach. The low quiescent current helps maintain efficiency at light loads, which is critical for power-sensitive applications.
Được đề xuất
Industrial Control Systems
In industrial control systems, the LTC3372IUH#PBF can generate multiple supply rails from a 24V or 48V bus. The HV buck controller efficiently steps down the high input voltage to an intermediate rail, while the four buck converters provide the low-voltage rails for microcontrollers, sensors, and communication interfaces. The wide input range (up to 60V) ensures operation during voltage transients. The device's robust protection features, including overcurrent and thermal shutdown, enhance system reliability in harsh industrial environments. Its compact QFN package saves board space, which is valuable in space-constrained control cabinets.
Được đề xuất
Automotive Infotainment
The LTC3372IUH#PBF is well-suited for automotive infotainment systems that require multiple voltage rails from a 12V battery. The HV controller can step down the battery voltage to an intermediate bus, while the buck converters generate the low voltages needed for processors, displays, and audio amplifiers. The wide input range handles load dump and cold-crank transients. The low quiescent current is beneficial for always-on systems, reducing battery drain when the vehicle is off. The device's small footprint and high efficiency help manage thermal constraints in the passenger compartment.
Được đề xuất
Telecom and Networking Equipment
In telecom and networking equipment, the LTC3372IUH#PBF can power multiple logic rails from a 48V backplane. The HV controller efficiently converts 48V to an intermediate bus voltage, and the buck converters provide the low-voltage rails for FPGAs, ASICs, and line cards. The high efficiency reduces power dissipation, which is critical in densely packed equipment racks. The configurable power stages allow designers to allocate current where needed, optimizing the power budget. The device's wide input range and robust protection ensure reliable operation in demanding telecom environments.
Được đề xuất
Battery-Powered Portable Devices
The LTC3372IUH#PBF is ideal for battery-powered portable devices that need multiple low-voltage rails from a single battery. The four buck converters can efficiently step down the battery voltage to the required levels for the processor, memory, and peripherals. The low quiescent current extends battery life, especially in standby modes. The HV controller can be used to charge a supercapacitor or handle a higher-voltage auxiliary input. The compact package and high integration reduce the overall solution size, which is essential for portable devices.
Được đề xuất
Test and Measurement Equipment
In test and measurement equipment, the LTC3372IUH#PBF provides clean, stable power rails for precision analog circuits, ADCs, DACs, and digital logic. The four buck converters can be configured to minimize noise and ripple, which is critical for accurate measurements. The HV controller can step down a wide range of input voltages, making the equipment versatile for different power sources. The device's low quiescent current and high efficiency reduce heat generation, improving the stability of sensitive measurements. The compact package allows for dense PCB layouts, which is beneficial in benchtop instruments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC3372IUH#PBF — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LTC3372IUK#PBF | LTC3370IUH#PBF | LTC3370IUK#PBF |
|---|---|---|---|---|
| Package | 48-QFN (7x7) | 48-QFN (7x7) | 48-QFN (7x7) | 48-QFN (7x7) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| HV Controller | Yes | Yes | No | No |
| Input Voltage (HV) | 4.5V to 60V | 4.5V to 60V | N/A | N/A |
| Input Voltage (Buck) | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V |
| Number of Buck Converters | 4 | 4 | 4 | 4 |
| Total Power Stages | 8 x 1A | 8 x 1A | 8 x 1A | 8 x 1A |
| Pinout | IUH | IUK | IUH | IUK |
Bảo phân biệt quan trọng
- Integrated high-voltage buck controller (vsLTC3370IUH#PBF)
- Wide input voltage range (vsLTC3370IUH#PBF)
- Configurable power stages (vsLTC3370IUH#PBF)
Ghi chú thiết kế
For optimal performance, place the input and output capacitors as close as possible to the respective pins of the LTC3372IUH#PBF. Use low-ESR ceramic capacitors with adequate voltage rating. The switching nodes (SW1-SW4 and HVSW) should have minimal copper area to reduce parasitic capacitance and EMI. Ensure a solid ground plane under the device and connect the exposed pad to it for thermal and electrical performance.
The LTC3372IUH#PBF can dissipate significant power when delivering high output currents. The 48-QFN package has an exposed pad that must be soldered to a large copper area on the PCB to act as a heatsink. For high-current applications, consider adding thermal vias to transfer heat to other layers. Monitor the junction temperature to ensure it stays within the maximum rating of 125°C.
A common mistake is neglecting the feedback loop compensation for the HV controller. Use the component values recommended in the datasheet for stable operation. Also, ensure that the input voltage for the buck converters does not exceed 5.5V, as this can damage the device. Properly configure the MODE pins to select the desired operating mode (e.g., Burst Mode or forced continuous) to optimize efficiency and noise performance.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Other compliance data not specified in the provided sources.
