LTM4644MPY#PBF - Quad 4A DC/DC μModule Regulator | Analog Devices
MPN： LTM4644MPY#PBF ✓ 啟用中LTM4644MPY#PBF 概覽
A μModule regulator is a complete power management solution in a single package, combining the controller, MOSFETs, inductors, and compensation circuitry. This integration reduces design complexity, improves reliability, and accelerates time-to-market. The LTM4644 belongs to the family of DC/DC converters, specifically non-isolated point-of-load (PoL) modules, which are essential in modern electronic systems for efficient voltage conversion.
Key features include four 4A outputs that can be paralleled for higher current, a wide input voltage range of 4V to 14V, and an adjustable output range of 0.6V to 5.5V. The module offers high efficiency, typically above 90%, and includes output voltage tracking, remote sense, and overcurrent protection. The MP grade ensures operation over the full -55°C to 125°C internal temperature range, making it suitable for harsh environments.
Technically, the LTM4644 uses a current-mode control architecture with internal compensation, providing stable operation with ceramic output capacitors. The module supports frequency synchronization from 400kHz to 1.8MHz, allowing optimization for efficiency or size. Its BGA package with 77 terminals ensures excellent thermal performance, with a junction-to-case thermal resistance of 6.5°C/W.
Typical applications include high-performance computing, networking equipment, industrial systems, and aerospace/defense electronics. The wide temperature range and high reliability make it ideal for mission-critical applications. For instance, in FPGA and ASIC power supplies, the LTM4644 can provide multiple low-voltage rails with tight regulation.
When designing with this module, ensure adequate input and output capacitance as specified in the datasheet. The MP grade is recommended for applications requiring extended temperature operation, while the E grade is suitable for commercial use. Proper thermal management, including a thermal pad connection to the PCB, is essential for maximizing performance.
直接替換替代品，適用於 LTM4644MPY#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： LTM4644MPY#PBF （相同外形與佔位） — 差異在於 Efficiency, Package, Features, Operating Temperature Range, Switching Frequency.
LTM4644EY#PBF
✅ 直接替換聯絡詢價
查看資料表 →LTM4644IY#PBF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LTM4644HY#PBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTM4644MPY#PBF
✅ 直接替換聯絡詢價
查看資料表 →LTM4644-1MPY#PBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTM4644MPY#PBF
✅ 直接替換聯絡詢價
查看資料表 →LTM4644MPY#PBF 最大額定值與電氣特性
| 輸出類型 | Adjustable |
| 輸出數量 | 4 |
| 輸出電壓範圍 | 0.6 V to 5.5 V |
| Output Current per Channel | 4 A |
| Maximum Total Output Current | 16 A (parallel) |
| 輸入電壓範圍 | 4 V to 14 V |
| 切換頻率 | 400 kHz to 1.8 MHz |
| 效率 | >90% typical |
| 工作溫度範圍 | -55°C to 125°C (internal) |
| 封裝 | BGA (16mm × 16mm × 5.01mm) |
| Number of Terminals | 77 |
| 安裝類型 | Surface Mount |
| Thermal Resistance (Junction-to-Case) | 6.5°C/W |
| Control Architecture | Current-mode |
| 功能特色 | Output voltage tracking, remote sense, overcurrent protection |
LTM4644MPY#PBF 腳位配置
| 腳位 A1 | VIN1 — Input supply for channel 1 |
| 腳位 A2 | VIN2 — Input supply for channel 2 |
| 腳位 A3 | VIN3 — Input supply for channel 3 |
| 腳位 A4 | VIN4 — Input supply for channel 4 |
| 腳位 B1 | VOUT1 — Output of channel 1 |
| 腳位 B2 | VOUT2 — Output of channel 2 |
| 腳位 B3 | VOUT3 — Output of channel 3 |
| 腳位 B4 | VOUT4 — Output of channel 4 |
| 腳位 C1 | GND — Ground |
| 腳位 C2 | GND — Ground |
| 腳位 C3 | GND — Ground |
| 腳位 C4 | GND — Ground |
典型應用
LTM4644MPY#PBF 適用於 6 應用s: FPGA and ASIC Power Supplies, Networking Equipment, Industrial Automation, Aerospace and Defense, High-Performance Computing, Medical Electronics.
FPGA and ASIC Power Supplies
The LTM4644MPY#PBF provides multiple low-voltage, high-current rails required by FPGAs and ASICs. Its four 4A outputs can be paralleled to deliver up to 16A for core voltages, while independent outputs power I/O and auxiliary rails. The module's wide input range (4V-14V) and adjustable output (0.6V-5.5V) accommodate various logic levels. Its high efficiency (>90%) reduces thermal stress, and the integrated inductors simplify layout. The MP grade's -55°C to 125°C range ensures reliable operation in harsh environments, making it ideal for aerospace and defense systems.
推薦
Networking Equipment
In networking equipment, the LTM4644MPY#PBF powers high-performance processors, SerDes, and memory. Its four outputs can supply separate rails for core, I/O, and auxiliary voltages, reducing the number of discrete regulators. The module's current-mode control and internal compensation ensure stable operation with ceramic capacitors, minimizing output ripple. The wide input range supports 12V intermediate bus architectures. The MP grade's extended temperature range is beneficial for outdoor and industrial networking gear. The compact BGA package saves board space, enabling dense designs.
推薦
Industrial Automation
The LTM4644MPY#PBF is well-suited for industrial automation systems that require reliable, efficient power delivery. Its wide input voltage range (4V-14V) accommodates various industrial supply rails, while the adjustable outputs (0.6V-5.5V) power microcontrollers, sensors, and communication interfaces. The module's high efficiency reduces heat generation, and its integrated design enhances reliability in vibration-prone environments. The MP grade's -55°C to 125°C operating range ensures performance in extreme temperatures. The module's remote sense feature maintains accurate output voltage despite load transients.
推薦
Aerospace and Defense
The LTM4644MPY#PBF is designed for aerospace and defense applications requiring high reliability and wide temperature operation. Its MP grade guarantees -55°C to 125°C internal temperature range, meeting stringent military specifications. The module's integrated design reduces component count and improves resistance to shock and vibration. The four outputs can be configured to power FPGAs, processors, and sensors in avionics and satellite systems. The module's high efficiency minimizes power loss, critical for space-based systems. Analog Devices provides screening and qualification data for space applications.
推薦
High-Performance Computing
In high-performance computing, the LTM4644MPY#PBF delivers multiple low-voltage, high-current rails for CPUs, GPUs, and memory. Its four 4A outputs can be paralleled to provide up to 16A for core voltages, while independent outputs power I/O and auxiliary rails. The module's high efficiency (>90%) reduces cooling requirements, and its compact BGA package saves board space. The wide input range (4V-14V) supports various power architectures. The MP grade's extended temperature range ensures reliable operation in data centers and edge computing environments.
推薦
Medical Electronics
The LTM4644MPY#PBF is suitable for medical electronics that demand high reliability and precise voltage regulation. Its four outputs can power multiple rails in imaging systems, patient monitors, and diagnostic equipment. The module's low output ripple and high PSRR ensure clean power for sensitive analog circuits. The wide input range (4V-14V) accommodates various battery and adapter voltages. The MP grade's -55°C to 125°C range ensures operation in sterilization and transport conditions. The integrated design simplifies compliance with medical safety standards.
推薦
推薦產品摘要
工程參考資料，適用於 LTM4644MPY#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 | LTM4644EY#PBF | LTM4644IY#PBF | LTM4644HY#PBF |
|---|---|---|---|---|
| Package | BGA (16mm × 16mm × 5.01mm) | BGA (16mm × 16mm × 5.01mm) | BGA (16mm × 16mm × 5.01mm) | BGA (16mm × 16mm × 5.01mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Current per Channel | 4A | 4A | 4A | 4A |
| Input Voltage Range | 4V to 14V | 4V to 14V | 4V to 14V | 4V to 14V |
| Output Voltage Range | 0.6V to 5.5V | 0.6V to 5.5V | 0.6V to 5.5V | 0.6V to 5.5V |
| Operating Temperature Range | -55°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Switching Frequency | 400kHz to 1.8MHz | 400kHz to 1.8MHz | 400kHz to 1.8MHz | 400kHz to 1.8MHz |
| Efficiency | >90% typical | >90% typical | >90% typical | >90% typical |
主要差異化特點
- Extended temperature range (-55°C to 125°C) (對比LTM4644EY#PBF)
- Integrated inductors and MOSFETs (對比Discrete DC/DC solutions)
- Configurable output array up to 16A (對比LTM4644-1MPY#PBF)
設計說明
The LTM4644MPY#PBF has a junction-to-case thermal resistance of 6.5°C/W. For high-current applications, ensure adequate PCB thermal management. Use multiple vias under the BGA package to conduct heat to inner and bottom layers. A thermal pad connection to a large copper plane is essential. For example, at 16A output with 5V drop, power dissipation is 80W, requiring a heatsink or forced airflow. Refer to the datasheet's thermal derating curves.
Place input and output capacitors close to the module's pins to minimize parasitic inductance. Use low-ESR ceramic capacitors, e.g., 22µF for input and 100µF for output per channel. The datasheet recommends specific capacitor values for stable operation. Ensure the PCB layout provides a low-impedance ground plane. For paralleling outputs, connect the outputs together with short, wide traces to balance current sharing.
Do not exceed the absolute maximum input voltage of 16V. Ensure the output voltage is set correctly using external resistors. The MP grade is required for -55°C operation; using E grade in such environments may cause failure. When paralleling outputs, all channels must have the same output voltage setting. Also, avoid operating at high input-output differentials without proper thermal management, as efficiency drops and power dissipation increases.
合規資訊
RoHS compliant per Analog Devices. Not AEC-Q100 qualified. Lead-free (PBF suffix).
