LTC3370EUH#TRPBF - 4-Ch 8A Configurable Buck DC/DC | Analog Devices
MPN： LTC3370EUH#TRPBF ✓ 啟用中LTC3370EUH#TRPBF 概覽
A configurable buck converter is a type of DC-DC step-down regulator that uses multiple internal power stages that can be combined to deliver higher current on fewer outputs. In the hierarchy of power management ICs, it sits above fixed-output regulators, offering flexibility in output count and current allocation. The LTC3370's architecture allows one to four outputs, each with up to 8A total, making it a versatile building block for systems requiring multiple low-voltage rails.
Key features include four synchronous buck converters with up to 8A total output current, 2.25V to 5.5V input range, adjustable output voltage down to 0.8V, and pin-configurable output current sharing. The device achieves high efficiency (up to 95%) by integrating low RDS(ON) switches and supports Burst Mode operation for light-load efficiency. It also includes soft-start, short-circuit protection, and thermal shutdown.
Technically, the LTC3370 uses a current-mode control architecture with a programmable switching frequency from 1MHz to 3MHz, allowing designers to trade off efficiency vs. component size. The C1-C3 pins set the configuration, and the MODE/SYNC pin allows external synchronization or Burst Mode. The device is available in a 32-lead WFQFN package with exposed pad for thermal management.
Typical applications include solid-state drives, FPGA/ASIC power supplies, optical modules, and industrial equipment where multiple low-voltage rails are needed. Its wide input range and high efficiency make it suitable for battery-powered devices and point-of-load regulation.
When designing with the LTC3370, ensure proper decoupling with 10µF ceramic capacitors on each input and output, and use the exposed pad for heat sinking. The switching frequency should be chosen to optimize efficiency and component size, and the C1-C3 pins must be set correctly for the desired output configuration.
直接替換替代品，適用於 LTC3370EUH#TRPBF — 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。
此系列的變體
與下列產品可直接替換的同系列型號： LTC3370EUH#TRPBF （相同外形與佔位） — 差異在於 Package, Output Voltage Range, Switching Frequency, Maximum Output Current, Operating Temperature Range.
LTC3370EUH#PBF
✅ 直接替換聯絡詢價
查看資料表 →LTC3370EUH
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3370IUKG#TRPBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65270
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65270
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3370EUH#TRPBF 最大額定值與電氣特性
| 功能 | Step-Down (Buck) |
| 輸出配置 | Positive, Adjustable |
| 拓撲 | Synchronous Buck |
| 輸出數量 | 4 |
| Output Current per Channel | 2A (max, configurable) |
| Total Output Current | 8A |
| 輸入電壓範圍 | 2.25V to 5.5V |
| 輸出電壓範圍 | 0.8V to 5.5V |
| 切換頻率 | 1MHz to 3MHz (programmable) |
| 同步整流器 | Yes |
| Control Architecture | Current Mode |
| 封裝 | 32-WFQFN Exposed Pad (5mm x 5mm) |
| 工作溫度範圍 | -40°C to 125°C (junction) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
LTC3370EUH#TRPBF 腳位配置
| 腳位 1 | SW1 — Switch node for buck 1 |
| 腳位 2 | PVIN1 — Power input for buck 1 |
| 腳位 3 | PVIN2 — Power input for buck 2 |
| 腳位 4 | SW2 — Switch node for buck 2 |
| 腳位 5 | GND — Ground |
| 腳位 6 | SW3 — Switch node for buck 3 |
| 腳位 7 | PVIN3 — Power input for buck 3 |
| 腳位 8 | PVIN4 — Power input for buck 4 |
| 腳位 9 | SW4 — Switch node for buck 4 |
| 腳位 10 | GND — Ground |
| 腳位 11 | C1 — Configuration pin 1 |
| 腳位 12 | C2 — Configuration pin 2 |
| 腳位 13 | C3 — Configuration pin 3 |
| 腳位 14 | MODE/SYNC — Mode select / external sync |
| 腳位 15 | RT — Switching frequency set resistor |
| 腳位 16 | RUN — Enable (active high) |
| 腳位 17 | VIN — Input supply |
| 腳位 18 | VOUT1 — Output voltage sense for buck 1 |
| 腳位 19 | VOUT2 — Output voltage sense for buck 2 |
| 腳位 20 | VOUT3 — Output voltage sense for buck 3 |
| 腳位 21 | VOUT4 — Output voltage sense for buck 4 |
| 腳位 22 | FB1 — Feedback for buck 1 |
| 腳位 23 | FB2 — Feedback for buck 2 |
| 腳位 24 | FB3 — Feedback for buck 3 |
| 腳位 25 | FB4 — Feedback for buck 4 |
| 腳位 26 | SS — Soft-start |
| 腳位 27 | PGOOD — Power good indicator |
| 腳位 28 | GND — Ground |
| 腳位 29 | GND — Ground |
| 腳位 30 | GND — Ground |
| 腳位 31 | GND — Ground |
| 腳位 32 | GND — Ground |
典型應用
LTC3370EUH#TRPBF 適用於 6 應用s: FPGA/ASIC Power Supplies, Solid-State Drives (SSD), Optical Modules, Industrial Equipment, Battery-Powered Devices, Point-of-Load (POL) Regulation.
FPGA/ASIC Power Supplies
The LTC3370EUH#TRPBF provides multiple configurable output rails (e.g., 1.0V core, 1.8V I/O, 2.5V auxiliary) from a single IC. Its 8A total current and adjustable outputs meet the sequencing and accuracy requirements of FPGAs. The high efficiency and small footprint reduce board space and thermal stress, making it ideal for compact designs.
推薦
Solid-State Drives (SSD)
In SSDs, the LTC3370EUH#TRPBF powers the controller, NAND flash, and DRAM with separate low-voltage rails. Its 2.25V to 5.5V input range suits 3.3V or 5V supplies, and the configurable outputs allow optimal current allocation. The high efficiency extends battery life in portable SSDs, and the small package fits M.2 form factors.
推薦
Optical Modules
The LTC3370EUH#TRPBF is used in optical transceivers to generate multiple low-noise rails for laser drivers, TIA, and digital control. Its low output ripple and high PSRR ensure clean power for sensitive analog circuits. The programmable switching frequency allows optimization for EMI, and the small package fits QSFP modules.
推薦
Industrial Equipment
In industrial systems, the LTC3370EUH#TRPBF provides multiple rails for microcontrollers, sensors, and communication interfaces. Its wide input range (2.25V to 5.5V) accommodates 3.3V and 5V buses, and the -40°C to 125°C temperature range ensures reliability in harsh environments. The configurable outputs simplify power tree design.
推薦
Battery-Powered Devices
The LTC3370EUH#TRPBF is ideal for battery-powered devices like portable instruments and IoT nodes. Its high efficiency (up to 95%) and Burst Mode operation extend battery life. The 2.25V to 5.5V input range supports single-cell Li-Ion or 3.3V/5V rails, and the small package minimizes PCB area.
推薦
Point-of-Load (POL) Regulation
The LTC3370EUH#TRPBF serves as a POL regulator for digital ICs, providing local, low-noise supply rails close to the load. Its high efficiency reduces heat, and the programmable frequency allows optimization for efficiency or size. The multiple outputs can replace several discrete regulators, saving board space and cost.
推薦
推薦產品摘要
工程參考資料，適用於 LTC3370EUH#TRPBF — 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 | LTC3370EUH#PBF | LTC3370EUH | LTC3370IUKG#TRPBF | TPS65270 |
|---|---|---|---|---|---|
| Package | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Outputs | 4 | 4 | 4 | 4 | 2 |
| Total Output Current | 8A | 8A | 8A | 8A | 6A |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 4.5V to 18V |
| Switching Frequency | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 300kHz to 2.2MHz |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Control Architecture | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode |
主要差異化特點
- Four configurable outputs with up to 8A total current (對比TPS65270)
- Wide input voltage range (2.25V to 5.5V) (對比TPS65270)
- Pin-programmable configuration (對比TPS65270)
設計說明
Place input and output capacitors close to the IC pins to minimize parasitic inductance. Use 10µF ceramic capacitors for each PVIN and VOUT. The exposed pad must be soldered to a large copper area for thermal dissipation. Follow the layout guidelines in the datasheet for optimal performance.
The LTC3370EUH#TRPBF can dissipate significant power at high output currents. Ensure adequate copper area on the PCB for heat sinking. The thermal resistance from junction to ambient (θJA) is typically 30°C/W with proper layout. For high ambient temperatures, consider airflow or a heatsink.
Set the C1-C3 pins correctly for the desired output configuration. Incorrect settings can lead to improper current sharing or output voltage errors. Also, ensure the RT resistor is within the specified range to set the switching frequency correctly. Do not leave the RUN pin floating; tie it to VIN if always enabled.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free packaging.
