LTM4650MPY#PBF - Dual 25A/50A DC/DC μModule | Analog Devices
料号： LTM4650MPY#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $45.32 | $45.32 |
| 10 | $41.87 | $418.70 |
| 100 | $38.5 | $3,850.00 |
| 500 | $35.2 | $17,600.00 |
| 1,000 | $32.1 | $32,100.00 |
LTM4650MPY#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 LTM4650 is a step-down (buck) converter, which reduces a higher input voltage to a lower output voltage. As a μModule, it integrates the inductor and power stage into a single package, reducing design complexity and board space compared to discrete solutions. This module falls under the category of power management ICs, specifically non-isolated point-of-load (PoL) converters.
Key features include dual 25A or single 50A output capability, high efficiency, and remote output voltage sensing for improved regulation at the load point. The module supports output voltage tracking and sequencing through the TRACK/SS pin, enabling controlled power-up in multi-rail systems. It also includes overcurrent and overtemperature protection, ensuring reliable operation under fault conditions.
The LTM4650 uses a constant frequency current mode architecture, providing fast transient response and stable operation with ceramic output capacitors. The integrated inductors and power FETs are optimized for low loss, achieving efficiencies up to 90% at full load. The module's thermal performance is enhanced by its exposed pad package, which allows efficient heat transfer to the PCB.
Typical applications include high-current FPGA, ASIC, and processor power supplies, where multiple low-voltage rails are required. It is also used in telecom and networking equipment, industrial systems, and military/aerospace electronics. The wide input range and high output current make it ideal for powering core voltages in advanced digital systems.
When designing with the LTM4650, ensure adequate input and output capacitance for stability and transient performance. The TRACK/SS pin allows soft-start and sequencing, which is critical for systems with strict power-up requirements. Thermal management is essential at high output currents; use a multi-layer PCB with thermal vias to dissipate heat effectively.
直接替换替代料： LTM4650MPY#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： LTM4650MPY#PBF （相同外形与封装尺寸） ——差异在于 Output Type, Package, Input Voltage Range, Number of Outputs, Output Voltage Range.
快速对比工具——选择替代料号进行并排对比：
LTM4650IY#PBF
✅ 直接替换✓ 有现货
$50 / 个
查看数据手册 →LTM4650EV#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTM4630AEY#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTM4620AEY#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTM4644EY#PBF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$27 / 个
查看数据手册 →LTM4650MPY#PBF 最大额定值与电气特性
| 输出类型 | Dual |
| 输出电压范围 | 0.6 V to 1.8 V (each output) |
| Output Current | 25 A per output, 50 A single output |
| 输入电压范围 | 4.5 V to 15 V |
| 工作温度范围 | -55°C to +125°C |
| 封装 | LGA (16mm x 16mm) |
| 安装类型 | Surface Mount |
| 输出数量 | 2 |
| Isolation | Non-Isolated |
| 控制特性 | TRACK/SS pin, remote sense |
| Protection | Overcurrent, overtemperature |
| RoHS 状态 | Compliant |
LTM4650MPY#PBF 引脚配置
| 引脚 1 | VIN — Input voltage |
| 引脚 2 | VOUT1 — Output 1 |
| 引脚 3 | VOUT2 — Output 2 |
| 引脚 4 | GND — Ground |
| 引脚 5 | TRACK/SS — Tracking and soft-start |
| 引脚 6 | RUN — Enable |
| 引脚 7 | SENSE1+ — Remote sense positive for output 1 |
| 引脚 8 | SENSE1- — Remote sense negative for output 1 |
| 引脚 9 | SENSE2+ — Remote sense positive for output 2 |
| 引脚 10 | SENSE2- — Remote sense negative for output 2 |
典型应用
LTM4650MPY#PBF 适用于 6 应用s: FPGA Power Supplies, ASIC Power Supplies, Telecom and Networking Equipment, Industrial Systems, Military and Aerospace Electronics, Data Center and Cloud Computing.
FPGA Power Supplies
The LTM4650MPY#PBF provides dual 25A outputs with adjustable 0.6V to 1.8V, ideal for powering FPGA core and I/O rails. Its high efficiency and low ripple ensure stable operation for high-performance FPGAs. The TRACK/SS pin enables proper sequencing for multi-rail requirements, and remote sense improves regulation at the load point.
推荐
ASIC Power Supplies
For ASICs requiring high current at low voltages, the LTM4650MPY#PBF delivers up to 50A single output. Its wide input range (4.5V to 15V) accommodates various bus voltages. The integrated inductors and MOSFETs reduce design complexity, and the military temperature range ensures reliability in demanding environments.
推荐
Telecom and Networking Equipment
In telecom systems, the LTM4650MPY#PBF powers line cards and switches with high efficiency. Its dual outputs can supply separate rails for logic and I/O. The module's compact LGA package saves board space, and its thermal performance supports continuous operation in confined enclosures.
推荐
Industrial Systems
The LTM4650MPY#PBF is suitable for industrial automation and control systems requiring robust power delivery. Its -55°C to +125°C temperature range exceeds industrial requirements, providing margin. The module's protection features (overcurrent, overtemperature) enhance system reliability in harsh factory environments.
推荐
Military and Aerospace Electronics
With its military temperature range, the LTM4650MPY#PBF is designed for defense and aerospace applications. It can power radar, avionics, and communication systems where extreme temperatures are common. The high output current supports demanding loads, and the integrated design reduces size and weight.
推荐
Data Center and Cloud Computing
In data centers, the LTM4650MPY#PBF powers high-performance processors and memory. Its high efficiency reduces cooling requirements, and the dual outputs can supply separate voltage domains. The module's remote sense ensures accurate voltage at the load, critical for high-current applications.
推荐
推荐产品汇总
工程参考数据： LTM4650MPY#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 | LTM4650IY#PBF | LTM4650EV#PBF | LTM4630AEY#PBF |
|---|---|---|---|---|
| Package | LGA (16mm x 16mm) | LGA (16mm x 16mm) | LGA (16mm x 16mm) | LGA (16mm x 16mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Current (per output) | 25A | 25A | 25A | 18A |
| Output Voltage Range | 0.6V to 1.8V | 0.6V to 1.8V | 0.6V to 1.8V | 0.6V to 1.8V |
| Input Voltage Range | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V |
| Operating Temperature Range | -55°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
| Number of Outputs | 2 | 2 | 2 | 2 |
| TRACK/SS Pin | Yes | Yes | Yes | Yes |
关键差异点
- Military temperature range (-55°C to +125°C) （对比 LTM4650IY#PBF)
- Higher output current (25A per output) compared to LTM4630AEY#PBF （对比 LTM4630AEY#PBF)
- Integrated inductors and power stage （对比 Discrete buck converter solutions)
设计说明
At 50A output, the LTM4650MPY#PBF dissipates significant power. Use a multi-layer PCB with thermal vias under the exposed pad to conduct heat to inner and bottom layers. Ensure adequate copper area for heat spreading. The military temperature rating allows operation up to +125°C case temperature, but derating may be required at high ambient temperatures.
Place input and output capacitors close to the module pins to minimize parasitic inductance. Use low-ESR ceramic capacitors for high-frequency decoupling. The datasheet recommends a specific capacitor configuration for stability; follow the typical application circuit. For remote sense, route sense lines as a differential pair to avoid noise pickup.
Do not exceed the absolute maximum input voltage of 16V. Ensure the TRACK/SS pin is properly connected for soft-start; leaving it floating may cause uncontrolled startup. When paralleling outputs for 50A, ensure proper current sharing by following the datasheet's parallel configuration. Verify output voltage accuracy with 1% resistors.
合规信息
RoHS compliant per '#PBF' suffix. Military grade, not AEC-Q100 qualified.
