LTM4644MPY#PBF - Quad 4A DC/DC μModule Regulator | Analog Devices
MPN: LTM4644MPY#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $30.94 | $30.94 |
| 10 | $28.5 | $285.00 |
| 100 | $25 | $2,500.00 |
| 500 | $22 | $11,000.00 |
| 1,000 | $20 | $20,000.00 |
Drop-in alternatives for LTM4644MPY#PBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTM4644IY#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4644EY#PBF
✅ Drop-In✓ In Stock
$30.94 / Unit
View Datasheet →LTM4643IY#PBF
✅ Drop-In✓ In Stock
$15.9 / Unit
View Datasheet →LTM4643EY#PBF
✅ Drop-In✓ In Stock
$20.37 / Unit
View Datasheet →LTM4644MPY#PBF
✅ Drop-In✓ In Stock
$20 / Unit
View Datasheet →LTM4644MPY#PBF Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable |
| Number of Outputs | 4 |
| Output Voltage Range | 0.6 V to 5.5 V |
| Output Current per Channel | 4 A |
| Maximum Total Output Current | 16 A (parallel) |
| Input Voltage Range | 4 V to 14 V |
| Switching Frequency | 400 kHz to 1.8 MHz |
| Efficiency | Up to 95% |
| Operating Temperature Range | -55°C to 125°C (internal) |
| Package | BGA (77 terminals) |
| Package Dimensions | 16 mm × 16 mm × 5.01 mm |
| Mounting Type | Surface Mount |
| Thermal Resistance (Junction-to-Case) | 6.5 °C/W |
| RoHS Status | Compliant |
| MSL Level | 3 |
LTM4644MPY#PBF Pin Configuration
| Pin A1 | VIN — Input supply voltage |
| Pin A2 | VIN — Input supply voltage |
| Pin A3 | VOUT1 — Output 1 |
| Pin A4 | VOUT1 — Output 1 |
| Pin A5 | VOUT2 — Output 2 |
| Pin A6 | VOUT2 — Output 2 |
| Pin A7 | VOUT3 — Output 3 |
| Pin A8 | VOUT3 — Output 3 |
| Pin A9 | VOUT4 — Output 4 |
| Pin A10 | VOUT4 — Output 4 |
| Pin B1 | GND — Ground |
| Pin B2 | GND — Ground |
| Pin B3 | GND — Ground |
| Pin B4 | GND — Ground |
| Pin B5 | GND — Ground |
| Pin B6 | GND — Ground |
| Pin B7 | GND — Ground |
| Pin B8 | GND — Ground |
| Pin B9 | GND — Ground |
| Pin B10 | GND — Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LTM4644MPY#PBF is suitable for 6 applications: FPGA and ASIC Power Supplies, Networking and Communication Equipment, Industrial Automation and Control, Aerospace and Defense Electronics, Medical Imaging and Diagnostic Equipment, High-Performance Computing and Data Centers.
FPGA and ASIC Power Supplies
The LTM4644MPY#PBF provides multiple low-voltage, high-current rails required by FPGAs and ASICs. With four 4A outputs, it can supply core, I/O, and auxiliary voltages from a single module. Its wide input range (4V-14V) allows direct operation from 12V intermediate bus, simplifying the power tree. The high efficiency reduces thermal stress, and the compact BGA package saves board space. Paralleling outputs enables higher current for demanding cores, while the adjustable output voltage ensures compatibility with various logic levels.
Recommended
Networking and Communication Equipment
In networking equipment, the LTM4644MPY#PBF powers high-performance processors, SerDes, and memory. Its four outputs can be configured to provide 1.0V, 1.2V, 1.8V, and 3.3V rails, meeting the requirements of modern networking ICs. The module's low output ripple and fast transient response ensure stable operation under varying loads. The wide temperature range (-55°C to 125°C) makes it suitable for outdoor and industrial networking gear. Its high efficiency reduces heat dissipation, enabling fanless designs in compact enclosures.
Recommended
Industrial Automation and Control
The LTM4644MPY#PBF is ideal for industrial automation systems that require reliable, isolated power for PLCs, motor controllers, and sensors. Its wide input range accommodates 12V or 24V industrial supplies, and the four outputs can power logic, analog, and communication interfaces. The module's robust design includes overcurrent and overtemperature protection, ensuring reliable operation in harsh environments. The MP grade's extended temperature range (-55°C to 125°C) is particularly beneficial for outdoor or high-temperature industrial settings. Its high efficiency reduces energy consumption and simplifies thermal management.
Recommended
Aerospace and Defense Electronics
The LTM4644MPY#PBF is designed for aerospace and defense applications where reliability and wide temperature operation are critical. Its MP grade guarantees performance from -55°C to 125°C, meeting military standards. The module's integrated design reduces component count, enhancing system reliability. It can power avionics, radar, and communication systems from a 28V bus (with appropriate step-down). The BGA package provides excellent thermal performance, essential for high-power density designs. Analog Devices offers additional screening for space applications, as noted in an EngineerZone inquiry.
Recommended
Medical Imaging and Diagnostic Equipment
In medical imaging systems like MRI and CT scanners, the LTM4644MPY#PBF provides clean, stable power for sensitive analog and digital circuits. Its low output noise and high PSRR ensure minimal interference with imaging signals. The four outputs can power FPGA, DSP, and ADC rails, while the wide input range allows operation from a 12V supply. The module's compact size is advantageous in space-constrained medical devices. The MP grade's extended temperature range ensures reliable operation in equipment that may be exposed to varying environmental conditions.
Recommended
High-Performance Computing and Data Centers
The LTM4644MPY#PBF is well-suited for high-performance computing and data center applications, where multiple low-voltage, high-current rails are needed for CPUs, GPUs, and memory. Its four 4A outputs can be paralleled to deliver up to 16A for a single rail, meeting the demands of modern processors. The module's high efficiency reduces power loss and cooling requirements, contributing to energy savings. The wide input range (4V-14V) allows direct connection to intermediate bus voltages. The compact BGA package enables high-density board layouts, essential in server and switch designs.
Recommended
Recommended Products Summary
Engineering reference data for LTM4644MPY#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTM4644IY#PBF | LTM4644EY#PBF | LTM4643IY#PBF | LTM4643EY#PBF |
|---|---|---|---|---|---|
| Package | BGA (77 terminals) | BGA (77 terminals) | BGA (77 terminals) | BGA (77 terminals) | BGA (77 terminals) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Outputs | 4 | 4 | 4 | 3 | 3 |
| Output Current per Channel | 4 A | 4 A | 4 A | 3 A | 3 A |
| Input Voltage Range | 4 V to 14 V | 4 V to 14 V | 4 V to 14 V | 4 V to 14 V | 4 V to 14 V |
| Output Voltage Range | 0.6 V to 5.5 V | 0.6 V to 5.5 V | 0.6 V to 5.5 V | 0.6 V to 5.5 V | 0.6 V to 5.5 V |
| Operating Temperature Range | -55°C to 125°C | -40°C to 125°C | 0°C to 125°C | -40°C to 125°C | 0°C to 125°C |
| Switching Frequency | 400 kHz to 1.8 MHz | 400 kHz to 1.8 MHz | 400 kHz to 1.8 MHz | 400 kHz to 1.8 MHz | 400 kHz to 1.8 MHz |
Key Differentiators
- Extended temperature range (-55°C to 125°C) (vs LTM4644EY#PBF)
- Quad output with 4A per channel (vs LTM4643IY#PBF)
- Higher total output current (16A) (vs LTM4643IY#PBF)
Design Notes
The LTM4644MPY#PBF dissipates significant power at high output currents. For example, at 12V input, 1.8V output, and 16A total load, power dissipation is approximately 12W. The BGA package has a junction-to-case thermal resistance of 6.5°C/W, so a proper thermal pad connection to the PCB is critical. Use multiple vias under the package to conduct heat to inner copper planes. Ensure adequate airflow or a heatsink for high-power applications.
Place input and output capacitors close to the module pins to minimize parasitic inductance. Use low-ESR ceramic capacitors, such as 100µF for input and 100µF for output per channel, as recommended in the datasheet. The BGA package requires a precise PCB footprint; follow the land pattern in the datasheet. Ensure the thermal pad is connected to a large copper area for heat spreading.
Do not exceed the absolute maximum input voltage of 16V. Ensure the output voltage is set correctly using external resistors; the feedback pin is sensitive to noise. For paralleling outputs, connect the outputs together and use the share pins as described in the datasheet. Avoid running the module without a minimum load, as this may cause instability. Always verify the temperature grade: the MP grade is required for -55°C operation.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified as it is a module, not an automotive IC.
