LTC3370IUH#TRPBF - 4-Ch 8A Configurable Buck DC/DC | Analog Devices
部品番号: LTC3370IUH#TRPBF ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.15 | $6.15 |
| 10 | $5.68 | $56.80 |
| 100 | $4.92 | $492.00 |
| 500 | $4.31 | $2,155.00 |
| 1,000 | $3.94 | $3,940.00 |
LTC3370IUH#TRPBF 概要
A multioutput power supply IC is a single integrated circuit that provides multiple regulated voltage rails from one or more input supplies, commonly used in systems requiring several low-voltage rails such as FPGAs, processors, and mixed-signal designs. The LTC3370 belongs to the family of configurable multi-rail DC/DC converters, which sit within the broader category of power management ICs (PMICs) that manage power distribution, conversion, and sequencing in electronic systems.
Key features include four independent synchronous buck converters with 2A maximum output per channel, a total output current of 8A, and an adjustable output voltage down to 0.8V. The device operates from a 2.25V to 5.5V input range, making it suitable for battery-powered and 5V rail applications. It offers high efficiency due to synchronous rectification, a low quiescent current of 40uA in Burst Mode operation, and a programmable switching frequency from 1MHz to 3MHz. The 32-WFQFN (5mm x 5mm) package with exposed pad provides excellent thermal performance.
Technically, the LTC3370 uses a current-mode control architecture with internal compensation, simplifying the external component count. The eight power stages can be combined in various configurations (e.g., 1x8A, 2x4A, 4x2A, or asymmetric combinations) to match the load requirements of different rails. The device includes soft-start, overcurrent protection, and thermal shutdown, ensuring robust operation in demanding environments. The pin-programmable configuration eliminates the need for external resistors or digital control, reducing design complexity.
Typical applications include powering FPGAs, DSPs, and microprocessors in industrial, automotive, and communications equipment, as well as portable devices requiring multiple low-voltage rails. The LTC3370's flexibility and high efficiency make it ideal for space-constrained designs where multiple point-of-load converters are needed.
When designing with the LTC3370, ensure adequate input and output capacitance to maintain stability and low output ripple. The exposed pad must be soldered to a large copper area for proper heat dissipation, especially at high output currents.
ドロップイン代替品: LTC3370IUH#TRPBF — 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: LTC3370IUH#TRPBF （同一形状・フットプリント） — 相違点: Maximum Output Current, Package, Output Voltage Range, Switching Frequency, Operating Temperature Range.
クイック比較ツール — 並列比較する代替部品を選択:
LTC3370IUH#PBF
✅ ドロップイン✓ 在庫あり
$5.5 / 個
データシートを見る →LTC3370IUH
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LTC3370IUH#TRPBF 最大定格＆電気的特性
| 機能 | Step-Down (Buck) |
| 出力構成 | Positive |
| トポロジー | Synchronous Buck |
| 出力数 | 4 |
| 出力タイプ | Adjustable |
| Voltage - Input (Min) | 2.25 V |
| Voltage - Input (Max) | 5.5 V |
| Voltage - Output (Min/Fixed) | 0.8 V |
| Voltage - Output (Max) | 5.5 V |
| Current - Output | 2 A per channel (8A total) |
| Frequency - Switching | 1 MHz to 3 MHz |
| 同期整流器 | Yes |
| 動作温度 | -40°C to 125°C (junction) |
| パッケージ / ケース | 32-WFQFN Exposed Pad |
| 実装タイプ | Surface Mount |
| Supplier Device Package | 32-QFN (5x5) |
| Base Product Number | LTC3370 |
LTC3370IUH#TRPBF ピン構成
| ピン 1 | SW1 — Switch node for channel 1 |
| ピン 2 | SW1 — Switch node for channel 1 |
| ピン 3 | VIN1 — Input supply for channel 1 |
| ピン 4 | VIN1 — Input supply for channel 1 |
| ピン 5 | GND — Ground |
| ピン 6 | GND — Ground |
| ピン 7 | SW2 — Switch node for channel 2 |
| ピン 8 | SW2 — Switch node for channel 2 |
| ピン 9 | VIN2 — Input supply for channel 2 |
| ピン 10 | VIN2 — Input supply for channel 2 |
| ピン 11 | GND — Ground |
| ピン 12 | GND — Ground |
| ピン 13 | SW3 — Switch node for channel 3 |
| ピン 14 | SW3 — Switch node for channel 3 |
| ピン 15 | VIN3 — Input supply for channel 3 |
| ピン 16 | VIN3 — Input supply for channel 3 |
| ピン 17 | GND — Ground |
| ピン 18 | GND — Ground |
| ピン 19 | SW4 — Switch node for channel 4 |
| ピン 20 | SW4 — Switch node for channel 4 |
| ピン 21 | VIN4 — Input supply for channel 4 |
| ピン 22 | VIN4 — Input supply for channel 4 |
| ピン 23 | GND — Ground |
| ピン 24 | GND — Ground |
| ピン 25 | C1 — Configuration pin 1 |
| ピン 26 | C2 — Configuration pin 2 |
| ピン 27 | C3 — Configuration pin 3 |
| ピン 28 | MODE/SYNC — Mode select / synchronization |
| ピン 29 | RT — Frequency programming resistor |
| ピン 30 | RUN — Enable pin |
| ピン 31 | VOUT1 — Output voltage sense for channel 1 |
| ピン 32 | VOUT2 — Output voltage sense for channel 2 |
主な用途
LTC3370IUH#TRPBF の用途: 6 件s: FPGA Power Supply, Processor Power, Industrial Multi-Rail Systems, Portable Battery-Powered Devices, Communications Equipment, Automotive Electronics.
FPGA Power Supply
The LTC3370IUH#TRPBF provides multiple low-voltage rails (e.g., 1.0V, 1.8V, 2.5V, 3.3V) for FPGA cores and I/O. Its configurable output currents (up to 8A total) match the varying load requirements of different FPGA rails. The high efficiency and small package make it ideal for space-constrained designs. With a 2.25V to 5.5V input, it can be powered from a 5V intermediate bus. The programmable switching frequency allows optimization for efficiency or component size. The device's synchronous rectification ensures high efficiency, reducing thermal stress. The pin-configurable outputs simplify design without external resistors. This makes the LTC3370 a versatile solution for FPGA power management.
おすすめ
Processor Power
The LTC3370IUH#TRPBF can power multiple processor rails, such as core, I/O, and memory voltages. Its four channels can be configured to provide different currents, e.g., 2A for core, 2A for I/O, and 4A for memory. The input range of 2.25V to 5.5V suits battery-powered or 5V systems. The low quiescent current in Burst Mode extends battery life in portable devices. The device's fast transient response ensures stable operation during processor load changes. The small 5x5mm QFN package saves board space. The programmable frequency allows designers to avoid noise-sensitive frequency bands. Overall, it simplifies multi-rail processor power design.
おすすめ
Industrial Multi-Rail Systems
In industrial systems, the LTC3370IUH#TRPBF provides multiple regulated rails for sensors, microcontrollers, and communication interfaces. Its wide input range (2.25V to 5.5V) allows operation from 3.3V or 5V supplies. The configurable outputs can be set to 1.8V, 2.5V, 3.3V, and 5V as needed. The device's robust protection features (overcurrent, thermal shutdown) ensure reliability in harsh environments. The -40°C to 125°C operating range meets industrial temperature requirements. The high efficiency reduces heat dissipation, enabling operation without active cooling. The small package is ideal for space-limited industrial PCBs. This makes the LTC3370 a practical choice for industrial power management.
おすすめ
Portable Battery-Powered Devices
The LTC3370IUH#TRPBF is well-suited for portable devices powered by batteries, such as handheld instruments and IoT devices. Its input range of 2.25V to 5.5V covers single-cell Li-Ion (3.0V-4.2V) and 5V USB supplies. The low quiescent current (40uA in Burst Mode) extends battery life. The four channels can power different subsystems (e.g., MCU, RF, display) with individual voltage and current settings. The high efficiency (up to 95%) minimizes power loss, reducing heat and maximizing runtime. The small 5x5mm package fits compact designs. The programmable frequency allows optimization for efficiency or component size. This makes the LTC3370 ideal for battery-powered multi-rail applications.
おすすめ
Communications Equipment
In communications equipment, the LTC3370IUH#TRPBF provides clean, regulated rails for FPGAs, DSPs, and transceivers. Its high PSRR and low output ripple ensure minimal noise interference in sensitive RF circuits. The configurable outputs can be set to 1.0V, 1.8V, 2.5V, and 3.3V as required. The device's synchronous rectification provides high efficiency, reducing thermal load in densely packed equipment. The programmable switching frequency allows designers to avoid interference with communication frequency bands. The small package is ideal for compact line cards and routers. The wide input range supports 5V backplane supplies. This makes the LTC3370 a reliable choice for communications power.
おすすめ
Automotive Electronics
The LTC3370IUH#TRPBF is suitable for automotive electronics, such as infotainment systems, ADAS, and body control modules. It operates over the automotive temperature range (-40°C to 125°C) and can be powered from a 5V rail derived from the car battery. The four channels can provide different voltages for microcontrollers, sensors, and displays. The device's robust protection features ensure reliable operation in harsh automotive environments. The high efficiency reduces heat generation, important in enclosed automotive modules. The small package saves space in crowded PCBs. While not explicitly AEC-Q100 qualified, it meets the temperature requirements. This makes the LTC3370 a viable option for automotive power management.
おすすめ
エンジニアリング参考データ: LTC3370IUH#TRPBF — 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 | LTC3370IUH#PBF | LTC3370IUH | LTC3375EUK |
|---|---|---|---|---|
| Package | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 24-QFN |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Outputs | 4 | 4 | 4 | 4 |
| Total Output Current | 8A | 8A | 8A | 8A |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.7V to 5.5V |
| Switching Frequency | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Packaging | Tape & Reel | Tube | Bulk | Tape & Reel |
主な差別化要因
- Configurable output currents via pin-strapping （vs LTC3375EUK)
- Higher total output current (8A) （vs LTC3375EUK)
- Wider input voltage range (2.25V to 5.5V) （vs LTC3375EUK)
設計ノート
Ensure the exposed pad (pin 33) is soldered to a large copper area for thermal dissipation. Use multiple vias to connect the pad to the ground plane. Place input and output capacitors close to the respective pins to minimize parasitic inductance. For each channel, use a 10uF ceramic capacitor at the input and a 22uF ceramic capacitor at the output, as recommended in the datasheet.
The LTC3370 can deliver up to 8A total output current. Ensure the input supply can provide sufficient current without excessive voltage drop. Use low-ESR ceramic capacitors to handle the high ripple currents. The power dissipation is calculated as (VIN - VOUT) * IOUT per channel; for high current and large voltage differences, consider thermal management.
Do not exceed the absolute maximum input voltage of 6V. The configuration pins C1-C3 must be set correctly to achieve the desired output current combination; incorrect settings can cause improper operation. The RT pin must have a resistor to ground to set the switching frequency; leaving it floating may cause erratic behavior. Ensure the RUN pin is properly driven to enable the device.
コンプライアンス情報
RoHS compliant per distributor listings. Not AEC-Q100 qualified, but suitable for automotive temperature range.
