LTM4650EY#PBF - Dual 25A or Single 50A μModule Regulator | Analog Devices
MPN: LTM4650EY#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $45 | $45.00 |
| 10 | $40.5 | $405.00 |
| 100 | $36 | $3,600.00 |
| 500 | $32.4 | $16,200.00 |
| 1,000 | $29 | $29,000.00 |
LTM4650EY#PBF Overview
A μModule regulator is a complete DC/DC converter system-in-package that includes the controller, power transistors, inductors, and compensation circuitry, reducing design complexity and time-to-market. It belongs to the broader category of switching regulators, which are more efficient than linear regulators for high-current applications. The LTM4650 leverages this integration to deliver up to 50A from a single module, simplifying thermal management and layout.
Key features include dual 25A outputs (or single 50A in parallel), 4.5V to 15V input range, 0.6V to 1.8V output range, and a switching frequency that can be synchronized to an external clock. It supports multi-phase operation for higher current, Burst Mode operation for light-load efficiency, and output voltage tracking for supply rail sequencing. The module also includes an onboard temperature diode for monitoring device temperature.
Technically, the LTM4650 uses a current-mode control architecture with internal compensation, ensuring stable operation with minimal external components. The integrated inductors and power FETs are optimized for low loss and high efficiency, achieving up to 90% efficiency at full load. The BGA package provides excellent thermal performance with a low thermal resistance from junction to case, enabling operation at high ambient temperatures with appropriate derating.
Typical applications include high-current FPGA, ASIC, and processor core supplies, where the module's high efficiency and small footprint are essential. It is also used in telecom, networking, and industrial systems requiring multiple low-voltage rails. The LTM4650's ability to parallel outputs makes it suitable for applications needing up to 50A from a single module.
When designing with the LTM4650, ensure adequate input and output capacitance as specified in the datasheet to maintain stability and transient response. The module's exposed pad should be soldered to a large copper area for heat dissipation. Also, consider the derating curve for output current versus ambient temperature to ensure reliable operation.
Drop-in alternatives for LTM4650EY#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 LTM4650EY#PBF (same form factor and footprint) — differing in Maximum Output Current, Output Type, Output Voltage Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTM4650IY#PBF
✅ Drop-In✓ In Stock
$50 / Unit
View Datasheet →LTM4650EY-1A#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4650EY-1B#PBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTM4650AIY#PBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTM4630EY#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4620EY#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTM4650EY#PBF Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable |
| Output Voltage Range | 0.6 V to 1.8 V |
| Maximum Output Current | 25 A per channel, 50 A single |
| Input Voltage Range | 4.5 V to 15 V |
| Number of Outputs | 2 |
| Operating Temperature | 0°C to 125°C (internal) |
| Package | BGA-144 |
| Mounting Type | Surface Mount |
| Size / Dimension | 16mm x 16mm x 5.01mm |
| RoHS Status | Compliant |
| Synchronization | Yes |
| Multi-Phase Operation | Yes |
| Burst Mode Operation | Yes |
| Output Voltage Tracking | Yes |
| Temperature Diode | Yes |
LTM4650EY#PBF Pin Configuration
| Pin A1 | VIN — Input supply |
| Pin A2 | VIN — Input supply |
| Pin B1 | VOUT1 — Output 1 |
| Pin B2 | VOUT1 — Output 1 |
| Pin C1 | VOUT2 — Output 2 |
| Pin C2 | VOUT2 — Output 2 |
| Pin D1 | GND — Ground |
| Pin D2 | GND — Ground |
| Pin E1 | RUN1 — Enable for output 1 |
| Pin E2 | RUN2 — Enable for output 2 |
| Pin F1 | TRACK1 — Tracking for output 1 |
| Pin F2 | TRACK2 — Tracking for output 2 |
| Pin G1 | SYNC — Frequency synchronization |
| Pin G2 | PHMODE — Phase mode selection |
| Pin H1 | TEMP — Temperature diode anode |
| Pin H2 | TEMP — Temperature diode cathode |
Typical Applications
LTM4650EY#PBF is suitable for 6 applications: FPGA Core Power, ASIC Core Supply, Telecom and Networking Equipment, Industrial Power Supplies, Data Center and Server Power, Automotive Infotainment.
FPGA Core Power
The LTM4650EY#PBF provides dual 25A or single 50A output with 0.6V to 1.8V adjustable range, ideal for powering high-performance FPGA cores. Its high efficiency and integrated inductors reduce board space and thermal design complexity. The module supports output voltage tracking and sequencing, which is critical for FPGA power-up sequences. With input range of 4.5V to 15V, it can be powered from common 12V rails. The compact BGA package enables dense layouts, and the integrated temperature diode allows monitoring for thermal management.
Recommended
ASIC Core Supply
The LTM4650EY#PBF is suitable for ASIC core supplies requiring up to 50A at low voltages (0.6V to 1.8V). Its dual-channel architecture allows independent rails or paralleled for higher current. The module's high efficiency reduces heat dissipation, and the integrated inductors simplify layout. The wide input range accommodates various intermediate bus voltages. The device supports frequency synchronization and multi-phase operation for scalable power delivery. The BGA package with exposed pad ensures good thermal transfer to the PCB.
Recommended
Telecom and Networking Equipment
In telecom and networking systems, the LTM4650EY#PBF provides efficient point-of-load conversion from 12V or 5V rails to low-voltage core supplies. Its high current capability supports multiple ASICs and FPGAs. The module's small footprint and integrated components save board space, critical in dense line cards. The device's ability to synchronize to an external clock reduces EMI and enables multi-phase operation for higher currents. The wide input range and robust thermal performance make it suitable for harsh environments.
Recommended
Industrial Power Supplies
The LTM4650EY#PBF is used in industrial power supplies where reliability and efficiency are paramount. Its input range of 4.5V to 15V allows operation from 12V or 24V (with pre-regulation) buses. The module's high efficiency reduces cooling requirements, and the integrated inductors minimize external component count. The device supports output voltage tracking for sequenced power-up in multi-rail systems. The BGA package provides robust mechanical and thermal performance in vibration-prone environments.
Recommended
Data Center and Server Power
In data centers and servers, the LTM4650EY#PBF powers high-current CPUs, GPUs, and memory rails. Its dual 25A outputs can be paralleled for 50A, meeting the demands of modern processors. The module's high efficiency reduces energy costs and cooling load. The compact BGA package allows high-density board designs. The device supports multi-phase operation for even higher currents and frequency synchronization to reduce EMI. The integrated temperature diode enables thermal monitoring for reliable operation.
Recommended
Automotive Infotainment
The LTM4650EY#PBF is used in automotive infotainment systems to power application processors and graphics chips. Its input range of 4.5V to 15V is compatible with automotive battery voltages (12V). The module's high efficiency and small footprint are ideal for space-constrained dashboards. The device supports output voltage tracking for proper power sequencing. The BGA package with exposed pad ensures reliable thermal performance in high-temperature environments. The E-grade is suitable for non-automotive temperature ranges; for automotive, consider the I-grade or MP-grade.
Recommended
Recommended Products Summary
Engineering reference data for LTM4650EY#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTM4650IY#PBF | LTM4650EY-1A#PBF | LTM4630EY#PBF | LTM4620EY#PBF |
|---|---|---|---|---|---|
| Package | BGA-144 | BGA-144 | BGA-144 | BGA-144 | BGA-144 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Current (per channel) | 25A | 25A | 25A | 18A | 13A |
| 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 |
| Input Voltage Range | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V | 4.5V to 15V |
| Operating Temperature | 0°C to 125°C | -40°C to 125°C | 0°C to 125°C | 0°C to 125°C | 0°C to 125°C |
Key Differentiators
- Highest output current in the LTM46xx family (vs LTM4630EY#PBF)
- Pin-compatible with LTM4620 and LTM4630 (vs LTM4620EY#PBF)
- Integrated inductors and FETs (vs Discrete buck converter solutions)
Design Notes
The LTM4650EY#PBF can dissipate significant power at high currents. Ensure adequate PCB copper area and thermal vias under the BGA package to keep the junction temperature within limits. The datasheet provides derating curves for output current vs. ambient temperature. For 50A operation, consider forced airflow or a heatsink to maintain reliability.
Place input and output capacitors close to the module pins to minimize parasitic inductance. Use low-ESR ceramic capacitors as specified in the datasheet. For high-current paths, use wide traces or copper pours to reduce resistance and voltage drops. Follow the recommended layout in the datasheet for optimal performance.
Do not exceed the maximum input voltage of 15V. Ensure the output voltage setting resistors are accurate (1% or better) to maintain regulation. When paralleling outputs, follow the datasheet's current sharing guidelines. Also, verify the operating temperature range: the E-grade is specified from 0°C to 125°C internal; for -40°C operation, use the I-grade version.
Compliance Information
RoHS compliant per distributor listings. Lead-free (Pb-free) indicated by #PBF suffix. AEC-Q100 not applicable as this is a module, not an IC.
