LTM4650MPY#PBF - Dual 25A/50A DC/DC μModule | Analog Devices
MPN： LTM4650MPY#PBF ✓ 啟用中LTM4650MPY#PBF 概覽
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.
直接替換替代品，適用於 LTM4650MPY#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： LTM4650MPY#PBF （相同外形與佔位） — 差異在於 Output Type, Package, Input Voltage Range, Number of Outputs, Output Voltage Range.
LTM4650IY#PBF
✅ 直接替換聯絡詢價
查看資料表 →LTM4650EV#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTM4630AEY#PBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTM4620AEY#PBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTM4644EY#PBF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LTM4650MPY#PBF 最大額定值與電氣特性
| 輸出類型 | Dual |
| 輸出電壓範圍 | 0.6 V to 1.8 V (each output) |
| Output Current | 25 A per output, 50 A single output |
| 輸入電壓範圍 | 4.5 V to 15 V |
| 工作溫度範圍 | -55°C to +125°C |
| 封裝 | LGA (16mm x 16mm) |
| 安裝類型 | Surface Mount |
| 輸出數量 | 2 |
| Isolation | Non-Isolated |
| 控制功能 | TRACK/SS pin, remote sense |
| Protection | Overcurrent, overtemperature |
| RoHS 狀態 | Compliant |
LTM4650MPY#PBF 腳位配置
| 腳位 1 | VIN — Input voltage |
| 腳位 2 | VOUT1 — Output 1 |
| 腳位 3 | VOUT2 — Output 2 |
| 腳位 4 | GND — Ground |
| 腳位 5 | TRACK/SS — Tracking and soft-start |
| 腳位 6 | RUN — Enable |
| 腳位 7 | SENSE1+ — Remote sense positive for output 1 |
| 腳位 8 | SENSE1- — Remote sense negative for output 1 |
| 腳位 9 | SENSE2+ — Remote sense positive for output 2 |
| 腳位 10 | SENSE2- — Remote sense negative for output 2 |
典型應用
LTM4650MPY#PBF 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 LTM4650MPY#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 | 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 |
主要差異化特點
- Military temperature range (-55°C to +125°C) (對比LTM4650IY#PBF)
- Higher output current (25A per output) compared to LTM4630AEY#PBF (對比LTM4630AEY#PBF)
- Integrated inductors and power stage (對比Discrete buck converter solutions)
設計說明
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.
合規資訊
RoHS compliant per '#PBF' suffix. Military grade, not AEC-Q100 qualified.
