LTM4644EY#PBF - Quad 4A DC/DC μModule Regulator | Analog Devices
料号： LTM4644EY#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $38.72 | $38.72 |
| 10 | $35.5 | $355.00 |
| 100 | $32 | $3,200.00 |
| 500 | $29.5 | $14,750.00 |
| 1,000 | $27 | $27,000.00 |
LTM4644EY#PBF 概述
A DC/DC converter is an electronic circuit that converts a source of direct current (DC) from one voltage level to another. The LTM4644EY#PBF is a step-down (buck) converter, which reduces a higher input voltage to a lower output voltage with high efficiency. As a μModule, it encapsulates the entire power train in a single package, offering a complete power management solution that minimizes external components and PCB area. This product belongs to the broader category of power management ICs, specifically switching voltage regulators, and is widely used in distributed power architectures.
Key features include four independent 4A outputs, each with its own SVIN pin for operation from input voltages as low as 2.375V, and a separate VIN pin for the power stage. The module supports output voltage tracking, remote sense, and parallel operation for higher current. It offers protection features such as overcurrent protection (OCP), overtemperature protection (OTP), and overvoltage protection (OVP). The operating temperature range is -40°C to 125°C, and the module is RoHS compliant.
Technically, the LTM4644EY#PBF uses a current-mode control architecture with internal compensation, ensuring stable operation across a wide range of output capacitors. The integrated inductors and power FETs are optimized for efficiency up to 95%, reducing power loss and thermal stress. The module's BGA package provides excellent thermal performance, with the exposed pad facilitating heat transfer to the PCB.
Typical applications include powering FPGAs, ASICs, DSPs, and memory in networking, telecommunications, industrial, and embedded systems. The quad-output configuration is particularly suited for multi-rail systems where multiple voltages are required, such as core, I/O, and auxiliary supplies. The ability to parallel outputs enables scaling to higher currents without redesign.
When designing with this module, ensure adequate input and output capacitance as recommended in the datasheet, and provide a low-impedance ground plane for thermal and electrical performance. The SVIN pins allow independent control of each channel, enabling flexible power sequencing.
直接替换替代料： LTM4644EY#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： LTM4644EY#PBF （相同外形与封装尺寸） ——差异在于 Package, Efficiency, Input Voltage Range, Output Type, Output Voltage Range.
快速对比工具——选择替代料号进行并排对比：
LTM4644IY#PBF
✅ 直接替换✓ 有现货
$20 / 个
查看数据手册 →LTM4644EY-1#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTM4644MPY#PBF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$20 / 个
查看数据手册 →LTM4644IY-1#PBF
✅ 直接替换📋 参考替代料（不在目录中）
TPS65240DRCR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTM4644EY#PBF 最大额定值与电气特性
| 输出类型 | Adjustable |
| 输出电压范围 | 0.6 V to 5.5 V |
| 最大输出电流 | 4 A per output (up to 16 A paralleled) |
| 输入电压范围 | 4 V to 14 V |
| 输出数量 | 4 |
| 效率 | Up to 95% |
| 工作温度 | -40°C to 125°C |
| 封装 | BGA (μModule) |
| 安装类型 | Surface Mount |
| 特性 | OCP, OTP, OVP |
| Applications | ITE (Commercial) |
| RoHS 状态 | Compliant |
| MSL 等级 | 3 (168 Hours) |
| REACH | Unaffected |
LTM4644EY#PBF 引脚配置
| 引脚 A1 | VIN — Power input for the top MOSFET |
| 引脚 A2 | SVIN1 — Signal input for channel 1 control circuitry |
| 引脚 A3 | SVIN2 — Signal input for channel 2 control circuitry |
| 引脚 A4 | SVIN3 — Signal input for channel 3 control circuitry |
| 引脚 A5 | SVIN4 — Signal input for channel 4 control circuitry |
| 引脚 B1 | VOUT1 — Output voltage for channel 1 |
| 引脚 B2 | VOUT2 — Output voltage for channel 2 |
| 引脚 B3 | VOUT3 — Output voltage for channel 3 |
| 引脚 B4 | VOUT4 — Output voltage for channel 4 |
| 引脚 B5 | GND — Ground |
| 引脚 C1 | RUN1 — Enable for channel 1 |
| 引脚 C2 | RUN2 — Enable for channel 2 |
| 引脚 C3 | RUN3 — Enable for channel 3 |
| 引脚 C4 | RUN4 — Enable for channel 4 |
| 引脚 C5 | PGOOD — Power good indicator |
典型应用
LTM4644EY#PBF 适用于 6 应用s: FPGA Power Supplies, Networking Equipment, Industrial Automation, Embedded Computing, Telecommunications, Data Center Servers.
FPGA Power Supplies
The LTM4644EY#PBF provides four independent 4A outputs, ideal for powering FPGA core, I/O, and auxiliary rails. Its wide input range (4V-14V) and high efficiency (up to 95%) reduce thermal stress, while the integrated inductors simplify layout. The module's parallel capability allows scaling to 16A for high-end FPGAs, and its OCP/OTP protections ensure reliable operation in demanding environments.
推荐
Networking Equipment
In networking switches and routers, the LTM4644EY#PBF powers multiple voltage rails for processors, memory, and SerDes. Its quad outputs can supply 0.9V, 1.2V, 1.8V, and 3.3V simultaneously, meeting the requirements of modern networking ICs. The module's high efficiency reduces heat in densely packed chassis, and its compact BGA package saves PCB space. The separate SVIN pins allow operation from lower input voltages, enhancing flexibility in power distribution.
推荐
Industrial Automation
The LTM4644EY#PBF is suitable for industrial automation systems that require multiple regulated voltages from a 12V or 24V bus. Its input range of 4V to 14V covers common industrial supplies, and the module's -40°C to 125°C operating range ensures reliability in harsh environments. The integrated protection features (OCP, OTP, OVP) safeguard against faults, while the high efficiency minimizes heat dissipation in sealed enclosures. The module's small footprint allows for compact control boards.
推荐
Embedded Computing
For embedded systems, the LTM4644EY#PBF provides a complete power solution for processors, memory, and peripherals. Its quad outputs can be configured to match the voltage requirements of SoCs and FPGAs, while the module's high efficiency extends battery life in portable applications. The integrated inductors reduce EMI and simplify compliance testing. The module's small size is ideal for space-constrained designs, and its parallel capability allows for future scalability.
推荐
Telecommunications
In telecom infrastructure, the LTM4644EY#PBF powers base stations, switches, and routers. Its wide input range (4V-14V) accommodates various intermediate bus voltages, and the quad outputs can supply multiple rails for ASICs and FPGAs. The module's high efficiency reduces cooling requirements, and its robust protection features ensure continuous operation. The compact BGA package enables high-density board designs, and the module's reliability is backed by Analog Devices' quality standards.
推荐
Data Center Servers
The LTM4644EY#PBF is used in data center servers to power CPUs, memory, and storage controllers. Its quad outputs can provide core, I/O, and auxiliary voltages with high efficiency, reducing energy consumption and heat. The module's parallel capability allows scaling to 16A for high-performance processors. The integrated inductors and power FETs minimize external components, simplifying design and improving reliability. The module's wide input range supports various power architectures.
推荐
推荐产品汇总
工程参考数据： LTM4644EY#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 | LTM4644IY#PBF | LTM4644EY-1#PBF | LTM4644MPY#PBF | LTM4644IY-1#PBF | TPS65240DRCR |
|---|---|---|---|---|---|---|
| Package | BGA (μModule) | BGA (μModule) | BGA (μModule) | BGA (μModule) | BGA (μModule) | BGA (μModule) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
关键差异点
- Quad-output design with 4A per channel （对比 TPS65240DRCR)
- Integrated inductors and power FETs （对比 Discrete solutions)
- High efficiency up to 95% （对比 LTM4644IY#PBF)
设计说明
Place the LTM4644EY#PBF on a PCB with a solid ground plane to ensure good thermal performance. The BGA package has an exposed pad that should be soldered to a thermal via array to dissipate heat. Follow the layout guidelines in the datasheet, including proper input and output capacitor placement close to the module pins.
The LTM4644EY#PBF can dissipate significant power at high output currents. Ensure adequate copper area and airflow to keep the junction temperature within the -40°C to 125°C range. Use thermal vias under the module to transfer heat to the opposite side of the PCB. For high ambient temperatures, consider derating the output current.
Do not exceed the absolute maximum input voltage of 14V on the VIN pin. The SVIN pins can operate from 2.375V, but the power stage requires the full input voltage. Ensure proper decoupling with low-ESR ceramic capacitors. Also, verify the output voltage setting resistors are correctly calculated for the desired output voltage.
合规信息
RoHS3 compliant and REACH unaffected per PartGenie data. Not AEC-Q100 qualified as it is not an automotive part.
