LTC3370IUH#PBF - 4-Ch 8A Configurable Buck DC/DC | Analog Devices
MPN： LTC3370IUH#PBF ✓ 啟用中LTC3370IUH#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 are essential in modern electronic systems for efficient voltage conversion. Unlike linear regulators, buck converters use switching elements to achieve high efficiency, especially when there is a large difference between input and output voltages. The LTC3370's configurable architecture allows it to replace multiple discrete regulators, saving board space and simplifying power supply design.
Key features of the LTC3370IUH#PBF include its four synchronous buck converters with eight 1A power stages, which can be combined to provide various output current configurations (e.g., 4x2A, 2x4A, 1x8A). The input voltage range of 2.25V to 5.5V makes it suitable for battery-powered and low-voltage systems. The device also features a programmable switching frequency, allowing trade-offs between efficiency and component size. Additionally, it includes internal compensation, soft-start, and overcurrent protection, enhancing reliability.
Technically, the LTC3370 uses a current-mode control architecture with synchronous rectification, achieving high efficiency across a wide load range. The pin-programmable configuration pins (C1-C3) allow the eight power stages to be allocated to the four outputs in different combinations, providing design flexibility. The device operates over a -40°C to 125°C junction temperature range, making it suitable for industrial and automotive environments. The WFQFN package with exposed pad aids in thermal dissipation, ensuring stable operation under full load.
Typical applications include portable devices, industrial equipment, and automotive electronics where multiple low-voltage rails are required. For example, it can power FPGAs, microcontrollers, and analog front-ends from a single 5V supply. Its high efficiency and small footprint make it ideal for space-constrained designs.
When designing with the LTC3370, ensure proper input and output capacitor selection to maintain stability and minimize ripple. The exposed pad should be soldered to a large copper area for effective heat sinking. Also, configure the C1-C3 pins correctly to achieve the desired output current distribution.
直接替換替代品，適用於 LTC3370IUH#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： LTC3370IUH#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#TRPBF
✅ 直接替換聯絡詢價
查看資料表 →LTC3370IUH
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3375EUK
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65270RGER
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65261RGER
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3370IUH#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 |
| 輸出數量 | 4 |
| 最大輸出電流 | 8A (total) |
| 輸入電壓範圍 | 2.25V to 5.5V |
| 切換頻率 | 1MHz to 3MHz (programmable) |
| 同步整流 | Yes |
| 封裝 | 32-WFQFN Exposed Pad |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40°C to +125°C (junction) |
| RoHS 狀態 | Compliant |
| REACH Status | Compliant |
LTC3370IUH#PBF 腳位配置
| 腳位 1 | SW1 — Switch node for buck converter 1 |
| 腳位 2 | SW1 — Switch node for buck converter 1 |
| 腳位 3 | VIN1 — Input supply for buck converter 1 |
| 腳位 4 | VIN1 — Input supply for buck converter 1 |
| 腳位 5 | GND — Ground |
| 腳位 6 | GND — Ground |
| 腳位 7 | SW2 — Switch node for buck converter 2 |
| 腳位 8 | SW2 — Switch node for buck converter 2 |
| 腳位 9 | VIN2 — Input supply for buck converter 2 |
| 腳位 10 | VIN2 — Input supply for buck converter 2 |
| 腳位 11 | GND — Ground |
| 腳位 12 | GND — Ground |
| 腳位 13 | SW3 — Switch node for buck converter 3 |
| 腳位 14 | SW3 — Switch node for buck converter 3 |
| 腳位 15 | VIN3 — Input supply for buck converter 3 |
| 腳位 16 | VIN3 — Input supply for buck converter 3 |
| 腳位 17 | GND — Ground |
| 腳位 18 | GND — Ground |
| 腳位 19 | SW4 — Switch node for buck converter 4 |
| 腳位 20 | SW4 — Switch node for buck converter 4 |
| 腳位 21 | VIN4 — Input supply for buck converter 4 |
| 腳位 22 | VIN4 — Input supply for buck converter 4 |
| 腳位 23 | GND — Ground |
| 腳位 24 | GND — Ground |
| 腳位 25 | C1 — Configuration pin 1 |
| 腳位 26 | C2 — Configuration pin 2 |
| 腳位 27 | C3 — Configuration pin 3 |
| 腳位 28 | RT — Switching frequency programming pin |
| 腳位 29 | RUN — Enable pin for all converters |
| 腳位 30 | VOUT1 — Output voltage sense for converter 1 |
| 腳位 31 | VOUT2 — Output voltage sense for converter 2 |
| 腳位 32 | VOUT3 — Output voltage sense for converter 3 |
| 腳位 33 | VOUT4 — Output voltage sense for converter 4 |
| 腳位 34 | GND — Exposed pad, ground |
典型應用
LTC3370IUH#PBF 適用於 6 應用s: Portable Electronics, Industrial Equipment, Automotive Electronics, FPGA Power Supplies, Networking Equipment, Medical Devices.
Portable Electronics
The LTC3370IUH#PBF is ideal for portable devices like smartphones, tablets, and wearables, where multiple low-voltage rails are needed. Its 2.25V to 5.5V input range matches Li-ion battery voltages, and its high efficiency extends battery life. The configurable outputs allow powering a processor core, memory, and I/O from a single IC, saving board space. With up to 8A total current, it can handle demanding loads while maintaining small footprint.
推薦
Industrial Equipment
In industrial automation and control systems, the LTC3370IUH#PBF provides multiple regulated rails for microcontrollers, sensors, and communication interfaces. Its wide operating temperature range (-40°C to +125°C) ensures reliability in harsh environments. The programmable switching frequency allows optimization for EMI and efficiency, which is critical in industrial settings. The device's robust protection features, including overcurrent and thermal shutdown, enhance system safety.
推薦
Automotive Electronics
The LTC3370IUH#PBF is suitable for automotive applications such as infotainment systems, ADAS, and body control modules. It operates from a 5V supply derived from the car battery, providing multiple rails for processors, memory, and peripherals. The device's high efficiency reduces heat generation, which is crucial in enclosed automotive environments. Its small package and configurable outputs make it easy to integrate into space-constrained designs.
推薦
FPGA Power Supplies
FPGAs require multiple voltage rails (core, I/O, auxiliary) with precise regulation and fast transient response. The LTC3370IUH#PBF can provide up to four outputs, each configurable to meet the current demands of different FPGA rails. Its high switching frequency allows the use of small inductors, reducing board space. The device's synchronous rectification ensures high efficiency, minimizing power loss and heat in dense FPGA designs.
推薦
Networking Equipment
In networking devices like routers and switches, the LTC3370IUH#PBF provides multiple low-voltage rails for processors, memory, and PHY chips. Its input range of 2.25V to 5.5V is compatible with common 3.3V and 5V supplies. The configurable outputs allow efficient power distribution, and the high switching frequency reduces the size of external components, enabling compact designs. The device's reliability is essential for 24/7 operation.
推薦
Medical Devices
The LTC3370IUH#PBF is used in medical devices such as patient monitors, diagnostic equipment, and portable medical instruments. It provides clean, regulated power for sensitive analog and digital circuits. Its low noise and high PSRR ensure minimal interference with medical measurements. The device's small size and high efficiency are beneficial for battery-powered portable medical devices, extending operational life.
推薦
推薦產品摘要
工程參考資料，適用於 LTC3370IUH#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#TRPBF | LTC3370IUH | LTC3375EUK | TPS65270RGER | TPS65261RGER |
|---|---|---|---|---|---|---|
| Package | 32-WFQFN Exposed Pad | 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 | Texas Instruments |
| Number of Outputs | 4 | 4 | 4 | 4 | 2 | 3 |
| Maximum Output Current | 8A (total) | 8A (total) | 8A (total) | 8A (total) | 6A (total) | 6A (total) |
| 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 | 4.5V to 18V |
| Switching Frequency | 1MHz to 3MHz (programmable) | 1MHz to 3MHz (programmable) | 1MHz to 3MHz (programmable) | 1MHz to 3MHz (programmable) | 300kHz to 1.4MHz | 300kHz to 1.4MHz |
| Synchronous Rectification | Yes | Yes | Yes | Yes | Yes | Yes |
| 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 | -40°C to +125°C |
主要差異化特點
- Four configurable outputs with eight 1A power stages (對比TPS65270RGER)
- Wide input voltage range of 2.25V to 5.5V (對比TPS65261RGER)
- Programmable switching frequency up to 3MHz (對比TPS65270RGER)
設計說明
For optimal thermal performance, solder the exposed pad of the 32-WFQFN package to a large copper area on the PCB. Use multiple vias to connect the pad to inner ground planes. This helps dissipate heat from the device, especially when operating at high output currents. Refer to the Analog Devices datasheet for recommended PCB layout guidelines.
Select input and output capacitors with low ESR and adequate voltage rating. For the LTC3370, a 10µF ceramic capacitor on each input and output is typically sufficient. Place capacitors close to the IC pins to minimize parasitic inductance. The programmable switching frequency allows optimization of capacitor size and ripple performance.
Ensure the C1-C3 configuration pins are set correctly to achieve the desired output current distribution. Incorrect settings can lead to overloading a single output. Also, verify that the total output current does not exceed 8A. Use the RT pin to set the switching frequency within the specified range to avoid instability.
合規資訊
RoHS compliant per part number suffix #PBF. REACH compliance indicated on distributor pages. Not AEC-Q100 qualified.
