LTC3370EUH#PBF - 4-Ch 8A Configurable Buck DC/DC | Analog Devices
料号： LTC3370EUH#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $10.29 | $10.29 |
| 10 | $9.45 | $94.50 |
| 100 | $8.57 | $857.00 |
| 500 | $7.82 | $3,910.00 |
| 1,000 | $7.15 | $7,150.00 |
LTC3370EUH#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 (PMICs), which manage power distribution and conversion in electronic systems. The LTC3370 is a synchronous buck converter, meaning it uses both high-side and low-side switches to achieve high efficiency, especially at lower output voltages. This architecture reduces power loss compared to asynchronous converters, making it ideal for battery-powered and energy-sensitive applications.
Key features of the LTC3370EUH#PBF include four independent buck converters with a total output current of 8A (eight 1A stages), adjustable output voltages from 0.8V to 5.5V, and a wide input voltage range of 2.25V to 5.5V. The device supports eight distinct power configurations, allowing designers to allocate the 1A stages flexibly among the four outputs. The switching frequency is programmable from 1MHz to 3MHz via an external resistor, enabling trade-offs between efficiency and component size. Additionally, the LTC3370 includes internal compensation, soft-start, and overcurrent protection, simplifying design and enhancing reliability.
From a technical perspective, the LTC3370 uses a current-mode control architecture with synchronous rectification, achieving efficiencies up to 95%. The eight 1A power stages can be paralleled to provide higher current on a single output, such as 4A on one output while the others are disabled. The C1-C3 pins allow configuration of the power stage assignment, providing flexibility for various load requirements. The device also features a power-good output and an enable pin for each channel, enabling sequenced power-up and fault monitoring. The 32-lead WFQFN package with exposed pad ensures excellent thermal performance, with a thermal resistance of approximately 28°C/W.
Typical applications for the LTC3370EUH#PBF include portable and battery-powered devices, FPGA and DSP power supplies, solid-state drives, and industrial equipment. Its ability to provide multiple regulated rails from a single input makes it ideal for systems requiring core, I/O, and auxiliary voltages. The high efficiency and low quiescent current extend battery life in handheld devices, while the programmable frequency allows optimization for EMI-sensitive applications.
When designing with the LTC3370, it is important to select appropriate external inductors and capacitors based on the switching frequency and output current. The exposed pad should be soldered to a large copper area for effective heat dissipation. Additionally, the C1-C3 pins must be configured correctly to achieve the desired power stage allocation, and the RT pin resistor sets the switching frequency. Proper layout with short, low-inductance paths for the switching nodes is critical to minimize noise and ensure stable operation.
直接替换替代料： LTC3370EUH#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： LTC3370EUH#PBF （相同外形与封装尺寸） ——差异在于 Package, Maximum Output Current, 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：
LTC3370HUH#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3370IUH#PBF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.5 / 个
查看数据手册 →LTC3370EUH#TRPBF
✅ 直接替换✓ 有现货
$3.92 / 个
查看数据手册 →LTC3370EUH
✅ 直接替换📋 参考替代料（不在目录中）
LTC3370HUH#TRPBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC3370IUH#TRPBF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.94 / 个
查看数据手册 →LTC3370EUH#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, eight 1A stages) |
| 输入电压范围 | 2.25V to 5.5V |
| 输出数量 | 4 |
| 开关频率 | 1MHz to 3MHz (programmable) |
| 同步整流 | Yes |
| 效率 | Up to 95% |
| 封装 | 32-WFQFN Exposed Pad (EUH) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40°C to +125°C |
| RoHS 状态 | Compliant |
| Control Architecture | Current Mode |
LTC3370EUH#PBF 引脚配置
| 引脚 1 | SW1 — Switch node for buck converter 1 |
| 引脚 2 | VIN1 — Input supply for buck converter 1 |
| 引脚 3 | VIN2 — Input supply for buck converter 2 |
| 引脚 4 | SW2 — Switch node for buck converter 2 |
| 引脚 5 | GND — Ground |
| 引脚 6 | SW3 — Switch node for buck converter 3 |
| 引脚 7 | VIN3 — Input supply for buck converter 3 |
| 引脚 8 | VIN4 — Input supply for buck converter 4 |
| 引脚 9 | SW4 — Switch node for buck converter 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 | RT — Switching frequency programming pin |
| 引脚 15 | EN1 — Enable for buck converter 1 |
| 引脚 16 | EN2 — Enable for buck converter 2 |
| 引脚 17 | EN3 — Enable for buck converter 3 |
| 引脚 18 | EN4 — Enable for buck converter 4 |
| 引脚 19 | PG — Power good output |
| 引脚 20 | VOUT1 — Output voltage sense for buck converter 1 |
| 引脚 21 | VOUT2 — Output voltage sense for buck converter 2 |
| 引脚 22 | VOUT3 — Output voltage sense for buck converter 3 |
| 引脚 23 | VOUT4 — Output voltage sense for buck converter 4 |
| 引脚 24 | GND — Ground |
| 引脚 25 | EXPOSED PAD — Exposed pad for thermal dissipation, connect to GND |
典型应用
LTC3370EUH#PBF 适用于 6 应用s: Portable and Battery-Powered Devices, FPGA and DSP Power Supplies, Solid-State Drives (SSDs), Industrial Equipment, Networking and Communication Equipment, Automotive Electronics (Non-AEC-Q100).
Portable and Battery-Powered Devices
The LTC3370EUH#PBF is ideal for portable devices like smartphones, tablets, and wearables, where multiple regulated rails are needed from a single battery. Its wide input range (2.25V to 5.5V) accommodates Li-Ion batteries, and the high efficiency (up to 95%) extends battery life. The configurable power stages allow designers to allocate current to different subsystems, such as processor core, memory, and I/O, optimizing power delivery. The low quiescent current in light-load modes further enhances battery endurance.
推荐
FPGA and DSP Power Supplies
FPGAs and DSPs require multiple voltage rails (e.g., core, I/O, auxiliary) with precise regulation and sequencing. The LTC3370EUH#PBF provides up to four independent outputs, each configurable to deliver the required current. The enable pins allow controlled power-up sequencing, preventing latch-up or excessive inrush current. The programmable switching frequency (1MHz to 3MHz) enables optimization for efficiency or component size, and the high efficiency reduces thermal stress in dense designs. This makes the LTC3370 a robust solution for high-performance computing platforms.
推荐
Solid-State Drives (SSDs)
SSDs require multiple power rails for the controller, NAND flash, and DRAM, with tight voltage tolerances and high efficiency to manage thermal dissipation. The LTC3370EUH#PBF's four buck converters can supply these rails from a single 3.3V or 5V input. The configurable power stages allow designers to allocate current based on the specific SSD architecture, and the high efficiency reduces heat generation, improving reliability. The small 32-WFQFN package saves board space, which is critical in compact SSD form factors.
推荐
Industrial Equipment
In industrial applications, the LTC3370EUH#PBF provides reliable multi-rail power from a 5V or 3.3V supply. Its wide operating temperature range (-40°C to +125°C) ensures performance in harsh environments. The programmable frequency allows designers to avoid EMI-sensitive frequency bands, and the current-mode control provides excellent line and load regulation. The device's robustness, including overcurrent protection and thermal shutdown, makes it suitable for factory automation, test equipment, and process control systems.
推荐
Networking and Communication Equipment
Networking equipment such as routers, switches, and base stations require multiple low-voltage rails for processors, ASICs, and transceivers. The LTC3370EUH#PBF can generate these rails from a 5V backplane supply with high efficiency, reducing power consumption and heat. The configurable power stages allow flexible current allocation, and the enable pins enable sequenced startup to avoid inrush current. The programmable switching frequency helps minimize EMI, which is critical in communication systems. This makes the LTC3370 an excellent choice for powering high-speed digital logic.
推荐
Automotive Electronics (Non-AEC-Q100)
While not AEC-Q100 qualified, the LTC3370EUH#PBF can be used in non-safety automotive applications such as infotainment systems, telematics, and body control modules. Its wide input range (2.25V to 5.5V) is compatible with automotive battery voltages (e.g., 3.3V, 5V rails). The high efficiency reduces heat in enclosed spaces, and the industrial temperature range (-40°C to +125°C) covers most automotive environments. The configurable outputs allow powering multiple loads, such as microcontrollers, sensors, and displays, from a single IC.
推荐
推荐产品汇总
工程参考数据： LTC3370EUH#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 | LTC3370HUH#PBF | LTC3370IUH#PBF | LTC3370EUH#TRPBF |
|---|---|---|---|---|
| Package | 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 |
| Output Current (Total) | 8A | 8A | 8A | 8A |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V |
| 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 | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz |
| Operating Temperature Range | -40°C to +125°C | -40°C to +150°C | -40°C to +125°C | -40°C to +125°C |
| Packaging | Tube | Tube | Tube | Tape & Reel |
关键差异点
- Configurable power stages （对比 LTC3370HUH#PBF)
- Industrial temperature range （对比 LTC3370HUH#PBF)
- Pb-free (RoHS compliant) （对比 LTC3370EUH)
设计说明
For optimal performance, place the LTC3370EUH#PBF close to the load and use short, wide traces for the switch nodes (SW1-SW4) to minimize parasitic inductance and resistance. The exposed pad must be soldered to a large copper area connected to ground to ensure proper heat dissipation. Use multiple vias to connect the exposed pad to the ground plane. Input and output capacitors should be placed as close as possible to the respective VIN and VOUT pins to reduce voltage spikes and improve transient response.
The LTC3370EUH#PBF can dissipate significant power when delivering high output currents. The 32-WFQFN package has a thermal resistance of approximately 28°C/W (theta_JA) with proper PCB layout. For example, at 8A total output with a 1V drop, power dissipation is 8W, causing a temperature rise of 224°C, which exceeds the maximum junction temperature. Therefore, ensure adequate copper area and airflow, or reduce the input-to-output voltage differential to keep the junction temperature within limits. Consider using a heatsink or forced cooling for high-power applications.
A common mistake is incorrect configuration of the C1-C3 pins, which determines the power stage allocation. Refer to the datasheet truth table to set these pins correctly for the desired output currents. Also, ensure the RT pin resistor is chosen to set the switching frequency within the specified range (1MHz to 3MHz). Do not leave the enable pins floating; tie them to VIN or use a controlled logic signal. Finally, verify that the input voltage does not exceed the absolute maximum rating of 5.5V, as this can damage the device.
合规信息
RoHS compliant per PBF suffix. Not AEC-Q100 qualified. REACH and conflict minerals status not specified in provided data.
