LTC3372EUH#PBF - 60V Low IQ Buck Controller + 4-Channel 8A Configurable Buck DC/DCs | Analog Devices
部品番号: LTC3372EUH#PBF ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.8 | $980.00 |
| 500 | $8.9 | $4,450.00 |
| 1,000 | $8.1 | $8,100.00 |
LTC3372EUH#PBF 概要
A multioutput power management IC (PMIC) is a single device that integrates multiple voltage regulators and controllers to generate several supply rails from one input source. In the hierarchy of power management, the LTC3372 sits as a PMIC that combines a switching controller (for high-voltage step-down) with integrated buck converters (for low-voltage rails), reducing board space and component count compared to discrete solutions. This architecture is essential in systems where multiple voltages are needed, such as FPGAs, processors, and mixed-signal circuits.
Key features include a 4.5V to 60V input range for the HV controller, a low quiescent current (Low IQ) for battery-powered applications, and four configurable LV buck channels that can be paralleled for higher current. The device supports spread spectrum operation for reduced EMI and includes a precision reference for accurate output regulation. The 48-QFN package with exposed pad provides excellent thermal performance, enabling high power density.
Technically, the LTC3372 uses a current-mode control architecture for fast transient response and stable operation over a wide range of output capacitors. The HV controller can be configured for various topologies, including buck, boost, or buck-boost, using external FETs. The LV channels are synchronous buck converters with internal switches, offering efficiencies up to 95%. The device includes programmable switching frequency, soft-start, and power-good outputs for sequencing.
Typical applications include industrial power supplies, automotive infotainment, base station power, and FPGA/processor power systems. The wide input range and configurable outputs make it ideal for systems that need to operate from 12V, 24V, or 48V buses while generating lower core voltages.
When designing with the LTC3372, careful attention must be paid to the HV controller's external FET selection and gate drive layout to minimize parasitic inductance. The LV channels require proper input and output capacitance to maintain stability and low ripple. The exposed pad should be soldered to a large copper area for thermal dissipation.
ドロップイン代替品: LTC3372EUH#PBF — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: LTC3372EUH#PBF （同一形状・フットプリント） — 相違点: Package, Input Voltage Range, Input Voltage Range (HV Controller), Number of Outputs, Protection Features.
クイック比較ツール — 並列比較する代替部品を選択:
LTC3372EUK#PBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LTC3372HUK#TRPBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LTC3372IUK#PBF
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LTC3372EUK#TRPBF
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TPS65381A-Q1
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
価格はお問い合わせください
データシートを見る →LTC3372EUH#PBF 最大定格＆電気的特性
| Input Voltage Range (HV Controller) | 4.5V to 60V |
| Number of LV Buck Channels | 4 |
| Total LV Output Current | 8A (configurable) |
| Output Voltage Range (LV) | 0.8V to VIN (adjustable) |
| スイッチング周波数 | 1MHz to 3MHz (programmable) |
| 動作温度範囲 | -40°C to 125°C (junction) |
| パッケージ | 48-QFN (7x7mm) |
| 実装タイプ | Surface Mount |
| Control Architecture | Current Mode |
| 同期整流 | Yes (LV channels) |
| Spread Spectrum | Yes |
| パワーグッド出力 | Yes |
| ソフトスタート | Yes (programmable) |
| RoHS ステータス | Compliant |
LTC3372EUH#PBF ピン構成
| ピン 1 | HVIN — High-voltage controller input |
| ピン 2 | HVGATE — High-side gate drive output |
| ピン 3 | HVSW — Switch node for HV controller |
| ピン 4 | HVFB — Feedback for HV controller |
| ピン 5 | GND — Ground |
| ピン 6 | LVIN1 — Input for LV buck channel 1 |
| ピン 7 | LVSW1 — Switch node for LV buck channel 1 |
| ピン 8 | LVFB1 — Feedback for LV buck channel 1 |
| ピン 9 | LVIN2 — Input for LV buck channel 2 |
| ピン 10 | LVSW2 — Switch node for LV buck channel 2 |
| ピン 11 | LVFB2 — Feedback for LV buck channel 2 |
| ピン 12 | GND — Ground |
主な用途
LTC3372EUH#PBF の用途: 6 件s: Industrial Power Supplies, Automotive Infotainment, FPGA and Processor Power, Base Station Power, Battery-Powered Devices, Test and Measurement.
Industrial Power Supplies
The LTC3372EUH#PBF is ideal for industrial power supplies that require multiple regulated rails from a high-voltage input. Its 4.5V to 60V input range allows direct operation from 24V or 48V industrial buses. The HV controller can step down to an intermediate rail, while the four LV bucks generate core voltages for microcontrollers, FPGAs, and sensors. The low quiescent current helps meet standby power regulations, and the programmable switching frequency allows optimization for efficiency or EMI. With up to 8A total output, it can power a variety of loads in factory automation, process control, and test equipment.
おすすめ
Automotive Infotainment
In automotive infotainment systems, the LTC3372EUH#PBF provides a compact power solution for processors, displays, and audio amplifiers. The wide input range handles load dump and cold-crank conditions (down to 4.5V). The four LV channels can supply 1.8V, 3.3V, and 5V rails with high efficiency, reducing heat in the dashboard. The spread spectrum feature minimizes EMI, which is critical for automotive EMC compliance. The device's -40°C to 125°C operating range ensures reliable operation in extreme environments. For AEC-Q100 compliance, consider the LTC3372HUK#TRPBF variant.
おすすめ
FPGA and Processor Power
FPGAs and processors often require multiple voltage rails (core, I/O, auxiliary) with precise sequencing. The LTC3372EUH#PBF simplifies this by integrating four configurable buck converters and a high-voltage controller. The LV channels can be paralleled to provide up to 8A for a high-current core rail, while the HV controller can generate a higher voltage for peripherals. The programmable soft-start and power-good outputs enable proper power sequencing. The high switching frequency (up to 3MHz) allows the use of small inductors, saving board space. This makes the LTC3372 ideal for communications, networking, and embedded computing systems.
おすすめ
Base Station Power
In base station and telecom equipment, the LTC3372EUH#PBF provides a robust power solution for 48V backplane systems. The HV controller steps down 48V to an intermediate bus, while the four LV bucks generate the low voltages needed for digital logic, RF transceivers, and signal processing. The wide input range and high efficiency reduce power loss and heat, which is crucial in densely packed equipment. The low quiescent current helps meet energy efficiency standards. The device's programmable frequency allows synchronization to avoid beat frequencies with RF circuits. This makes it suitable for remote radio heads, small cells, and distributed antenna systems.
おすすめ
Battery-Powered Devices
For battery-powered devices, the LTC3372EUH#PBF's low quiescent current (Low IQ) extends battery life. The wide input range allows operation from a variety of battery chemistries, including Li-ion (3.0V to 4.2V) and lead-acid (up to 60V for HV controller). The four LV channels can efficiently generate multiple voltages for sensors, MCUs, and wireless modules. The device supports burst mode operation for light loads, further reducing power consumption. The small 48-QFN package and high integration save board space, making it suitable for portable instruments, medical devices, and IoT gateways.
おすすめ
Test and Measurement
In test and measurement equipment, the LTC3372EUH#PBF provides clean, stable power rails for precision analog circuits. The low output ripple and high PSRR of the LV bucks ensure minimal noise injection into sensitive measurement paths. The programmable frequency allows optimization to avoid interference with measurement frequencies. The HV controller can generate higher voltages for stimulus circuits, while the LV channels power ADCs, DACs, and digital logic. The device's thermal performance in the 48-QFN package supports continuous operation in benchtop instruments. This makes it suitable for oscilloscopes, spectrum analyzers, and data acquisition systems.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LTC3372EUH#PBF — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | LTC3372EUK#PBF | LTC3372HUK#TRPBF | TPS65381A-Q1 |
|---|---|---|---|---|
| Package | 48-QFN (7x7mm) | 48-QFN (7x7mm) | 48-QFN (7x7mm) | 48-QFN (7x7mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 4.5V to 60V | 4.5V to 60V | 4.5V to 60V | 4.5V to 40V |
| Number of Outputs | 1 HV controller + 4 LV bucks | 1 HV controller + 4 LV bucks | 1 HV controller + 4 LV bucks | 3 bucks + 1 LDO |
| Total Output Current | 8A (LV) | 8A (LV) | 8A (LV) | 3A (bucks) |
| Switching Frequency | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 2.2MHz fixed |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C | -40°C to 150°C | -40°C to 125°C |
| AEC-Q100 | No | No | No | Yes |
主な差別化要因
- Integrated high-voltage controller plus four low-voltage bucks （vs LTC3370EUH#PBF)
- Wide input voltage range (4.5V to 60V) （vs TPS65381A-Q1)
- Configurable 8A total output current （vs TPS65381A-Q1)
設計ノート
For the HV controller, select external N-channel MOSFETs with appropriate voltage and current ratings. Ensure the gate drive voltage is sufficient to fully enhance the FETs. Use a bootstrap capacitor for the high-side FET. The LV buck channels have internal switches, but proper input and output capacitance is essential for stability. Refer to the datasheet for recommended capacitor values and ESR ranges.
The 48-QFN package has an exposed pad that must be soldered to a large copper area on the PCB for effective heat dissipation. Calculate power dissipation based on the total output current and efficiency. For high-current applications, consider adding thermal vias under the pad. The junction temperature should be kept below 125°C for reliable operation.
Keep the high-current paths (input, switch nodes, output) short and wide to minimize parasitic inductance and resistance. Place the input capacitors close to the VIN pins and the output capacitors close to the feedback sense points. For the HV controller, route the gate drive traces carefully to avoid noise coupling. Use a solid ground plane and separate analog and power grounds if necessary.
コンプライアンス情報
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive grade, consider LTC3372HUK#TRPBF or TPS65381A-Q1.
