LTM4644IY#PBF - Quad 4A DC/DC μModule Regulator | Analog Devices
MPN: LTM4644IY#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $42.43 | $42.43 |
| 10 | $38.5 | $385.00 |
| 100 | $34.2 | $3,420.00 |
| 500 | $31.5 | $15,750.00 |
| 1,000 | $30.94 | $30,940.00 |
Drop-in alternatives for LTM4644IY#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-1#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4644EY#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4644EY-1#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4644A
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4644IY#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 | [DATA_NEEDED: switching frequency] |
| Efficiency | [DATA_NEEDED: efficiency at typical operating point] |
| Package | 77-pin BGA (15mm x 15mm x 5.01mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C to 125°C (internal) |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| AEC-Q100 | Not qualified |
| Lead-Free | Yes |
| Halogen-Free | Unknown |
| Conflict Minerals | Compliant |
LTM4644IY#PBF Pin Configuration
| Pin A1 | VIN — Input supply voltage |
| Pin A2 | VOUT1 — Output 1 |
| Pin A3 | VOUT2 — Output 2 |
| Pin A4 | VOUT3 — Output 3 |
| Pin A5 | VOUT4 — Output 4 |
| Pin B1 | GND — Ground |
| Pin B2 | RUN1 — Enable for output 1 |
| Pin B3 | RUN2 — Enable for output 2 |
| Pin B4 | RUN3 — Enable for output 3 |
| Pin B5 | RUN4 — Enable for output 4 |
| Pin C1 | PGOOD1 — Power good indicator for output 1 |
| Pin C2 | PGOOD2 — Power good indicator for output 2 |
| Pin C3 | PGOOD3 — Power good indicator for output 3 |
| Pin C4 | PGOOD4 — Power good indicator for output 4 |
| Pin C5 | COMP1 — Compensation pin for output 1 |
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
LTM4644IY#PBF is suitable for 6 applications: FPGA Power Supply, ASIC Power Supply, Telecom and Networking Equipment, Industrial Systems, Medical Devices, Automotive Electronics.
FPGA Power Supply
The LTM4644IY#PBF provides four 4A outputs that can be paralleled to deliver up to 16A for FPGA core and I/O rails. Its 0.6V to 5.5V adjustable output range covers typical FPGA voltages, and the integrated inductors reduce EMI, which is critical for high-speed digital systems. The module's high efficiency minimizes thermal stress in dense FPGA boards.
Recommended
ASIC Power Supply
ASICs often require multiple low-voltage, high-current rails with tight regulation. The LTM4644IY#PBF's four 4A outputs can be configured to provide separate core, I/O, and auxiliary voltages. Its wide input range (4V to 14V) allows operation from intermediate bus voltages, and the integrated design simplifies layout and improves reliability.
Recommended
Telecom and Networking Equipment
In telecom and networking systems, the LTM4644IY#PBF powers line cards, switches, and routers. Its 4V to 14V input range is compatible with standard telecom bus voltages, and the four outputs can supply different logic levels. The module's high efficiency reduces heat in densely packed equipment, and its compact BGA package saves board space.
Recommended
Industrial Systems
The LTM4644IY#PBF is suitable for industrial applications such as PLCs, motor drives, and test equipment. Its industrial temperature grade (-40°C to 125°C) ensures reliable operation in harsh environments. The module's robust protection features, including overcurrent and overtemperature shutdown, enhance system reliability.
Recommended
Medical Devices
Medical devices require reliable, low-noise power supplies. The LTM4644IY#PBF's integrated design minimizes EMI and provides clean outputs, which is essential for sensitive medical electronics. Its wide input range and adjustable outputs make it adaptable to various battery or adapter voltages, and the compact package fits space-constrained designs.
Recommended
Automotive Electronics
Although not AEC-Q100 qualified, the LTM4644IY#PBF can be used in non-critical automotive applications where the industrial temperature range is sufficient. Its ability to provide multiple regulated rails from a 12V battery bus makes it useful for infotainment, ADAS, and body control modules. The module's high efficiency helps manage thermal constraints in the vehicle environment.
Recommended
Recommended Products Summary
Engineering reference data for LTM4644IY#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTM4644IY-1#PBF | LTM4644EY#PBF | LTM4644A |
|---|---|---|---|---|
| Package | 77-pin BGA | 77-pin BGA | 77-pin BGA | 77-pin BGA |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Outputs | 4 | 4 | 4 | 4 |
| 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 | -40°C to 125°C | -40°C to 125°C | 0°C to 125°C | -40°C to 125°C |
| RoHS Compliant | Yes | Yes | Yes | Yes |
Key Differentiators
- Industrial temperature grade (vs LTM4644EY#PBF)
- Pin-to-pin compatible with LTM4644IY-1#PBF (vs LTM4644IY-1#PBF)
- Integrated inductors and power FETs (vs TPS65400)
Design Notes
The LTM4644IY#PBF in a 77-pin BGA package dissipates heat through the exposed pad and PCB vias. For high-current operation (e.g., 16A total), ensure a thermal relief pattern with multiple vias to the ground plane. The datasheet recommends a minimum copper area of 1 square inch for adequate heat spreading. Monitor junction temperature to stay within the -40°C to 125°C range.
Place input and output capacitors close to the module pins to minimize parasitic inductance. Use low-ESR ceramic capacitors (e.g., 22µF) for input and output. The datasheet provides specific capacitor recommendations for each output. Ensure the PCB layout follows the reference design in the datasheet to achieve optimal performance and stability.
Do not exceed the absolute maximum input voltage of 16V. Ensure the output voltage setting resistors are 1% tolerance or better. When paralleling outputs, connect the COMP pins together and use a single feedback network. Verify that the RUN pins are properly driven to avoid unintended shutdown. Refer to the datasheet for detailed configuration guidelines.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free (Pb-free) indicated by #PBF suffix.
