LTC3370MPUH#PBF - 4-Ch 8A Configurable Buck | Analog Devices
料号： LTC3370MPUH#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
LTC3370MPUH#PBF 概述
A multioutput buck converter is a type of DC-DC switching regulator that provides multiple regulated output voltages from a single input supply. It belongs to the broader category of power management ICs, which manage power distribution and conversion in electronic systems. By integrating multiple converters on one chip, it reduces component count, board area, and cost compared to discrete solutions.
Key features include a wide input voltage range of 2.25V to 5.5V, adjustable output voltage down to 0.8V, and a common switching frequency programmable via an external resistor. The device achieves high efficiency through synchronous rectification and offers low total no-load supply current, making it suitable for battery-powered applications. Its flexible configuration allows designers to allocate power stages dynamically to meet varying load requirements.
Technically, the LTC3370 uses a current-mode control architecture with internal compensation, ensuring stable operation across a wide range of output capacitors. The eight power stages can be combined in various parallel configurations to deliver higher current to a single output or distributed across multiple outputs. The pin-programmable C1-C3 pins simplify configuration without external components, reducing design complexity.
Typical applications include portable devices, industrial equipment, and automotive systems where multiple low-voltage rails are needed. For example, it can power an FPGA core, I/O, and auxiliary circuits from a single 5V supply. Its high efficiency and low quiescent current extend battery life in handheld devices.
When designing with this device, ensure proper input and output capacitor selection to maintain stability and minimize ripple. The exposed pad must be soldered to a large copper area for adequate thermal dissipation, especially at high output currents.
直接替换替代料： LTC3370MPUH#PBF ——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： LTC3370MPUH#PBF （相同外形与封装尺寸） ——差异在于 Maximum Output Current, Package, Operating Temperature Range, Output Voltage Range, Switching Frequency.
快速对比工具——选择替代料号进行并排对比：
LTC3370IUH#PBF
✅ 直接替换✓ 有现货
$5.5 / 个
查看数据手册 →LTC3370EUH#PBF
✅ 直接替换✓ 有现货
$7.15 / 个
查看数据手册 →TPS65251RHAR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS65254RHAR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS65253RHAR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC3370MPUH#PBF 最大额定值与电气特性
| 输出类型 | Adjustable |
| 输出电压范围 | 0.8V to 5.5V |
| 最大输出电流 | 8A (total, configurable up to 4A per channel) |
| 输入电压范围 | 2.25V to 5.5V |
| 输出数量 | 4 |
| 开关频率 | Programmable via external resistor |
| 同步整流 | Yes |
| 工作温度范围 | -40°C to 125°C (junction) |
| 封装 | 32-WFQFN Exposed Pad |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| REACH Status | Compliant |
| Control Architecture | Current Mode |
LTC3370MPUH#PBF 引脚配置
| 引脚 1 | SW1 — Switch node for buck 1 |
| 引脚 2 | VIN1 — Input supply for buck 1 |
| 引脚 3 | GND — Ground |
| 引脚 4 | SW2 — Switch node for buck 2 |
| 引脚 5 | VIN2 — Input supply for buck 2 |
| 引脚 6 | GND — Ground |
| 引脚 7 | SW3 — Switch node for buck 3 |
| 引脚 8 | VIN3 — Input supply for buck 3 |
| 引脚 9 | GND — Ground |
| 引脚 10 | SW4 — Switch node for buck 4 |
| 引脚 11 | VIN4 — Input supply for buck 4 |
| 引脚 12 | GND — Ground |
| 引脚 13 | C1 — Configuration pin 1 |
| 引脚 14 | C2 — Configuration pin 2 |
| 引脚 15 | C3 — Configuration pin 3 |
| 引脚 16 | RT — Switching frequency programming |
| 引脚 17 | RUN — Enable control |
| 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 | GND — Ground |
| 引脚 27 | GND — Ground |
| 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
LTC3370MPUH#PBF 适用于 6 应用s: FPGA Power Supply, Portable Devices, Industrial Automation, Automotive Electronics, Networking Equipment, Medical Devices.
FPGA Power Supply
The LTC3370MPUH#PBF provides multiple low-voltage rails (e.g., 1.0V core, 1.8V I/O, 2.5V auxiliary) from a single 5V input. Its configurable power stages allow up to 4A per channel, meeting the dynamic current demands of FPGAs. The high efficiency and low noise help maintain signal integrity in high-speed designs.
推荐
Portable Devices
In battery-powered portable devices, the LTC3370MPUH#PBF efficiently converts battery voltage (2.25V-5.5V) to multiple regulated rails for processors, memory, and peripherals. Its low no-load supply current extends standby time, while the small 32-WFQFN package saves board space. The configurable outputs allow optimization for different operating modes.
推荐
Industrial Automation
The LTC3370MPUH#PBF is suitable for industrial control systems requiring multiple stable voltage rails from a 5V supply. Its wide temperature range (-40°C to 125°C) ensures reliable operation in harsh environments. The synchronous buck converters provide high efficiency, reducing heat dissipation in sealed enclosures.
推荐
Automotive Electronics
For automotive applications, the LTC3370MPUH#PBF can power infotainment systems, ADAS processors, and sensors from a 5V rail. Its high temperature grade supports under-hood environments. However, it is not AEC-Q100 qualified, so for strict automotive compliance, consider alternatives with certification.
推荐
Networking Equipment
In networking equipment like routers and switches, the LTC3370MPUH#PBF provides multiple rails for SoCs, PHYs, and memory. Its configurable outputs allow flexible power allocation, and the high efficiency reduces cooling requirements. The small package is ideal for dense PCB layouts.
推荐
Medical Devices
The LTC3370MPUH#PBF is used in medical devices requiring multiple low-noise voltage rails, such as patient monitors and diagnostic equipment. Its low output ripple and high efficiency are critical for sensitive analog circuits. The wide temperature range ensures reliable operation in clinical environments.
推荐
推荐产品汇总
工程参考数据： LTC3370MPUH#PBF ——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 | LTC3370IUH#PBF | LTC3370EUH#PBF | TPS65251RHAR |
|---|---|---|---|---|
| Package | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 4.5V to 18V |
| Output Current (Total) | 8A | 8A | 8A | 3A |
| Number of Outputs | 4 | 4 | 4 | 3 |
| Output Voltage Range | 0.8V to 5.5V | 0.8V to 5.5V | 0.8V to 5.5V | 0.8V to 5.5V |
| Switching Frequency | Programmable | Programmable | Programmable | Fixed 500kHz |
| Operating Temperature Range | -40°C to 125°C | -40°C to 85°C | 0°C to 85°C | -40°C to 125°C |
关键差异点
- Higher temperature grade (M) for -40°C to 125°C operation （对比 LTC3370IUH#PBF)
- Configurable 8A total output with up to 4A per channel （对比 TPS65251RHAR)
- Wide input voltage range of 2.25V to 5.5V （对比 TPS65251RHAR)
设计说明
Place input and output capacitors close to the IC pins to minimize parasitic inductance. Use low-ESR ceramic capacitors (e.g., 10uF) for each input and output. The exposed pad must be soldered to a large copper area for thermal dissipation and electrical grounding.
At high output currents, the power dissipation can be significant. Calculate the junction temperature using the package thermal resistance (theta_JA) and ensure it stays below 125°C. Use multiple vias under the exposed pad to conduct heat to the PCB ground plane.
Ensure the C1-C3 pins are set correctly for the desired output configuration. Incorrect settings can lead to improper current sharing. Also, verify the switching frequency programming resistor value to avoid instability or excessive ripple.
合规信息
RoHS and REACH compliant per Analog Devices. Not AEC-Q100 qualified.
