LTC3370EUH#TRPBF - 4-Ch 8A Configurable Buck DC/DC | Analog Devices
料号： LTC3370EUH#TRPBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.51 | $55.10 |
| 100 | $4.9 | $490.00 |
| 500 | $4.41 | $2,205.00 |
| 1,000 | $3.92 | $3,920.00 |
LTC3370EUH#TRPBF 概述
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.
直接替换替代料： LTC3370EUH#TRPBF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LTC3370EUH#TRPBF （相同外形与封装尺寸） ——差异在于 Package, Output Voltage Range, Switching Frequency, Maximum Output Current, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
LTC3370EUH#PBF
✅ 直接替换✓ 有现货
$7.15 / 个
查看数据手册 →LTC3370EUH
✅ 直接替换📋 参考替代料（不在目录中）
LTC3370IUKG#TRPBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS65270
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS65270
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC3370EUH#TRPBF 最大额定值与电气特性
| 功能 | Step-Down (Buck) |
| 输出配置 | Positive, Adjustable |
| 拓扑 | Synchronous Buck |
| 输出数量 | 4 |
| Output Current per Channel | 2A (max, configurable) |
| Total Output Current | 8A |
| 输入电压范围 | 2.25V to 5.5V |
| 输出电压范围 | 0.8V to 5.5V |
| 开关频率 | 1MHz to 3MHz (programmable) |
| 同步整流器 | Yes |
| Control Architecture | Current Mode |
| 封装 | 32-WFQFN Exposed Pad (5mm x 5mm) |
| 工作温度范围 | -40°C to 125°C (junction) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
LTC3370EUH#TRPBF 引脚配置
| 引脚 1 | SW1 — Switch node for buck 1 |
| 引脚 2 | PVIN1 — Power input for buck 1 |
| 引脚 3 | PVIN2 — Power input for buck 2 |
| 引脚 4 | SW2 — Switch node for buck 2 |
| 引脚 5 | GND — Ground |
| 引脚 6 | SW3 — Switch node for buck 3 |
| 引脚 7 | PVIN3 — Power input for buck 3 |
| 引脚 8 | PVIN4 — Power input for buck 4 |
| 引脚 9 | SW4 — Switch node for buck 4 |
| 引脚 10 | GND — Ground |
| 引脚 11 | C1 — Configuration pin 1 |
| 引脚 12 | C2 — Configuration pin 2 |
| 引脚 13 | C3 — Configuration pin 3 |
| 引脚 14 | MODE/SYNC — Mode select / external sync |
| 引脚 15 | RT — Switching frequency set resistor |
| 引脚 16 | RUN — Enable (active high) |
| 引脚 17 | VIN — Input supply |
| 引脚 18 | VOUT1 — Output voltage sense for buck 1 |
| 引脚 19 | VOUT2 — Output voltage sense for buck 2 |
| 引脚 20 | VOUT3 — Output voltage sense for buck 3 |
| 引脚 21 | VOUT4 — Output voltage sense for buck 4 |
| 引脚 22 | FB1 — Feedback for buck 1 |
| 引脚 23 | FB2 — Feedback for buck 2 |
| 引脚 24 | FB3 — Feedback for buck 3 |
| 引脚 25 | FB4 — Feedback for buck 4 |
| 引脚 26 | SS — Soft-start |
| 引脚 27 | PGOOD — Power good indicator |
| 引脚 28 | GND — Ground |
| 引脚 29 | GND — Ground |
| 引脚 30 | GND — Ground |
| 引脚 31 | GND — Ground |
| 引脚 32 | GND — Ground |
典型应用
LTC3370EUH#TRPBF 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： LTC3370EUH#TRPBF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Four configurable outputs with up to 8A total current （对比 TPS65270)
- Wide input voltage range (2.25V to 5.5V) （对比 TPS65270)
- Pin-programmable configuration （对比 TPS65270)
设计说明
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.
合规信息
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free packaging.
