LTC3370MPUH#PBF - 4-Ch 8A Configurable Buck | Analog Devices
MPN： LTC3370MPUH#PBF ✓ 啟用中LTC3370MPUH#PBF 概覽
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.
直接替換替代品，適用於 LTC3370MPUH#PBF — 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： LTC3370MPUH#PBF （相同外形與佔位） — 差異在於 Maximum Output Current, Package, Operating Temperature Range, Output Voltage Range, Switching Frequency.
LTC3370IUH#PBF
✅ 直接替換聯絡詢價
查看資料表 →LTC3370EUH#PBF
✅ 直接替換聯絡詢價
查看資料表 →TPS65251RHAR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65254RHAR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65253RHAR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3370MPUH#PBF 最大額定值與電氣特性
| 輸出類型 | Adjustable |
| 輸出電壓範圍 | 0.8V to 5.5V |
| 最大輸出電流 | 8A (total, configurable up to 4A per channel) |
| 輸入電壓範圍 | 2.25V to 5.5V |
| 輸出數量 | 4 |
| 切換頻率 | Programmable via external resistor |
| 同步整流 | Yes |
| 工作溫度範圍 | -40°C to 125°C (junction) |
| 封裝 | 32-WFQFN Exposed Pad |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| REACH Status | Compliant |
| Control Architecture | Current Mode |
LTC3370MPUH#PBF 腳位配置
| 腳位 1 | SW1 — Switch node for buck 1 |
| 腳位 2 | VIN1 — Input supply for buck 1 |
| 腳位 3 | GND — Ground |
| 腳位 4 | SW2 — Switch node for buck 2 |
| 腳位 5 | VIN2 — Input supply for buck 2 |
| 腳位 6 | GND — Ground |
| 腳位 7 | SW3 — Switch node for buck 3 |
| 腳位 8 | VIN3 — Input supply for buck 3 |
| 腳位 9 | GND — Ground |
| 腳位 10 | SW4 — Switch node for buck 4 |
| 腳位 11 | VIN4 — Input supply for buck 4 |
| 腳位 12 | GND — Ground |
| 腳位 13 | C1 — Configuration pin 1 |
| 腳位 14 | C2 — Configuration pin 2 |
| 腳位 15 | C3 — Configuration pin 3 |
| 腳位 16 | RT — Switching frequency programming |
| 腳位 17 | RUN — Enable control |
| 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 | GND — Ground |
| 腳位 27 | GND — Ground |
| 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
LTC3370MPUH#PBF 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 LTC3370MPUH#PBF — 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 | 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 |
主要差異化特點
- Higher temperature grade (M) for -40°C to 125°C operation (對比LTC3370IUH#PBF)
- Configurable 8A total output with up to 4A per channel (對比TPS65251RHAR)
- Wide input voltage range of 2.25V to 5.5V (對比TPS65251RHAR)
設計說明
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.
合規資訊
RoHS and REACH compliant per Analog Devices. Not AEC-Q100 qualified.
