LTM4650IY#PBF - Dual 25A or Single 50A μModule Regulator | Analog Devices
MPN: LTM4650IY#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $66.54 | $66.54 |
| 10 | $62.5 | $625.00 |
| 100 | $58 | $5,800.00 |
| 500 | $54 | $27,000.00 |
| 1,000 | $50 | $50,000.00 |
LTM4650IY#PBF Overview
A μModule regulator is a complete DC/DC power supply in a single package, combining the controller, MOSFETs, inductor, and compensation into a module. This approach reduces design complexity, minimizes external component count, and accelerates time-to-market. The LTM4650 belongs to the family of μModule regulators, which are part of the broader category of switching voltage regulators and power management ICs. By integrating the magnetic components, the μModule ensures predictable performance and simplifies thermal management.
Key features include dual 25A outputs or a single 50A output, 0.8% DC and 3% transient accuracy (for the -1A variant), and a wide input range of 4.5V to 15V. The module supports output voltage tracking and remote sensing for precise regulation at the load point. The LTM4650IY#PBF is the industrial temperature grade variant, guaranteed from -40°C to 125°C internal temperature, ensuring reliable operation in harsh environments.
Technically, the LTM4650 uses a current-mode control architecture with internal compensation, providing fast transient response and stable operation. The integrated inductors and power FETs are optimized for efficiency, reducing power losses. The module includes overcurrent and overtemperature protection, enhancing system reliability. The BGA package (144 terminals) offers excellent thermal performance, with the exposed pad facilitating heat transfer to the PCB.
Typical applications include high-current FPGA, ASIC, and processor power supplies, where multiple rails with tight voltage tolerances are required. The dual outputs can be paralleled to deliver up to 50A for a single rail, making it suitable for high-performance computing, networking, and telecommunications equipment. The wide input range also supports 12V bus architectures common in industrial and automotive systems.
When designing with the LTM4650, ensure adequate input and output capacitance to meet transient requirements. The module's remote sense pins should be connected to the load point to maintain regulation accuracy. Thermal management is critical at high output currents; use a multi-layer PCB with thermal vias to dissipate heat effectively.
Drop-in alternatives for LTM4650IY#PBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTM4650IY#PBF (same form factor and footprint) — differing in Output Type, Package, Output Voltage Range, Maximum Output Current, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTM4650IY-1A#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4650MPY
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4650IY-1B#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4650A
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTM4630AEY#PBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTM4650IY#PBF Maximum Ratings & Electrical Characteristics
| Output Type | Dual (2 outputs) |
| Output Voltage Range | 0.6 V to 1.8 V (each output) |
| Maximum Output Current | 25 A per output, 50 A single output |
| Input Voltage Range | 4.5 V to 15 V |
| DC Accuracy | 0.8% (for -1A variant) |
| Transient Accuracy | 3% (for -1A variant) |
| Operating Temperature Range | -40°C to 125°C (internal) |
| Package | BGA (144 terminals) |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Isolation | Non-Isolated |
| RoHS Status | Compliant |
LTM4650IY#PBF Pin Configuration
| Pin A1 | VIN — Input voltage |
| Pin B1 | VOUT1 — Output 1 |
| Pin C1 | VOUT2 — Output 2 |
| Pin D1 | GND — Ground |
| Pin E1 | RUN1 — Enable for output 1 |
| Pin F1 | RUN2 — Enable for output 2 |
| Pin G1 | TRACK/SS1 — Tracking/soft-start for output 1 |
| Pin H1 | TRACK/SS2 — Tracking/soft-start for output 2 |
| Pin J1 | SENSE1+ — Remote sense positive for output 1 |
| Pin K1 | SENSE1- — Remote sense negative for output 1 |
| Pin L1 | SENSE2+ — Remote sense positive for output 2 |
| Pin M1 | SENSE2- — Remote sense negative for output 2 |
Typical Applications
LTM4650IY#PBF is suitable for 6 applications: FPGA and ASIC Power Supplies, Networking and Telecom Equipment, Data Center and Cloud Computing, Industrial Automation and Robotics, Automotive and Transportation, Test and Measurement Equipment.
FPGA and ASIC Power Supplies
The LTM4650IY#PBF provides dual 25A outputs with 0.6V to 1.8V range, ideal for powering FPGA core and I/O rails. Its high efficiency and integrated inductors reduce board space and simplify layout, while remote sensing ensures accurate voltage at the load point. The module's fast transient response meets the dynamic current demands of modern FPGAs, and its wide input range supports 12V intermediate bus architectures.
Recommended
Networking and Telecom Equipment
In networking and telecom systems, the LTM4650IY#PBF powers high-current ASICs and line cards. Its dual outputs can be paralleled for a single 50A rail, providing flexibility. The module's -40°C to 125°C operating range ensures reliability in outdoor and industrial environments. The integrated design reduces component count, improving MTBF and simplifying thermal management in dense boards.
Recommended
Data Center and Cloud Computing
The LTM4650IY#PBF is well-suited for data center servers and cloud computing platforms where high-current, low-voltage rails are required for CPUs and GPUs. Its 50A single-output capability and 0.8% DC accuracy ensure stable power delivery. The module's high efficiency reduces cooling requirements, and its compact BGA package enables high-density designs. Remote sensing compensates for PCB trace voltage drops, maintaining regulation at the load.
Recommended
Industrial Automation and Robotics
In industrial automation, the LTM4650IY#PBF powers motor controllers, PLCs, and robotic systems. Its wide input range (4.5V to 15V) accommodates 12V and 24V industrial buses with appropriate conversion. The module's rugged design and -40°C to 125°C temperature range ensure operation in harsh factory environments. The integrated inductors and protection features reduce external component count and enhance system reliability.
Recommended
Automotive and Transportation
The LTM4650IY#PBF is suitable for automotive infotainment, ADAS, and telematics systems that require high-current, low-voltage power. Its input range covers 12V automotive batteries, and the industrial temperature grade supports under-hood applications. The module's high efficiency minimizes heat generation, and its compact size fits space-constrained designs. However, for AEC-Q100 compliance, consider the LTM4650IY-1A#PBF or other automotive-grade variants.
Recommended
Test and Measurement Equipment
The LTM4650IY#PBF provides clean, accurate power for test and measurement instruments, such as oscilloscopes and signal generators. Its low output noise and tight regulation (0.8% DC) ensure stable reference voltages. The dual outputs can power analog and digital sections separately, reducing interference. The module's remote sensing maintains accuracy at the load, critical for precision measurements.
Recommended
Engineering reference data for LTM4650IY#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTM4650IY-1A#PBF | LTM4650MPY | LTM4650IY-1B#PBF | LTM4650A | LTM4630AEY#PBF |
|---|---|---|---|---|---|---|
| Package | BGA (144) | BGA (144) | BGA (144) | BGA (144) | BGA (144) | BGA (144) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Current (per output) | 25A | 25A | 25A | 25A | 25A | 18A |
| Input Voltage Range | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V |
| Output Voltage Range | 0.6V to 1.8V | 0.6V to 1.8V | 0.6V to 1.8V | 0.6V to 1.8V | 0.6V to 1.8V | 0.6V to 5.5V |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -55°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Special Features | Dual 25A or single 50A | Improved accuracy | Military grade | Variant | Enhanced tracking | Lower current |
Key Differentiators
- Dual 25A or single 50A output capability (vs LTM4630AEY#PBF)
- Industrial temperature grade (-40°C to 125°C) (vs LTM4650MPY)
- Integrated inductors and power FETs (vs Discrete solutions)
Design Notes
At 50A output, power dissipation can be significant. Use a multi-layer PCB with thermal vias under the module to conduct heat to inner ground planes. The BGA package's exposed pad should be soldered to a large copper area. Ensure adequate airflow or heatsinking for high ambient temperature operation.
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 specific capacitor values and types; follow them for stable operation. Route sense lines as differential pairs to avoid noise pickup.
Do not exceed the maximum input voltage of 15V. Ensure the output voltage is set correctly with the external resistor. The TRACK/SS pins should be connected to a capacitor for proper soft-start; leaving them floating may cause startup issues. Verify the module's thermal derating at high currents.
Compliance Information
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable for this industrial-grade module.
