RE4630: The Efficiency Leader for High-Current Computing
RE4630 is a high-current DC/DC power module designed to deliver exceptional efficiency and power density for multi-core CPUs and GPUs in high-end servers and workstations. It offers flexible output configurations (dual 18A or single 36A) to adapt to varying power requirements. The integrated differential remote sense amplifier ensures precise voltage regulation at the load, even under heavy current loads, minimizing power loss and ensuring optimal chip performance. Its high-efficiency design reduces thermal output, lowering cooling costs and enhancing system reliability in mission-critical applications.
RE4630: Industrial-Grade Dual 18A High-Load Power Module
Housed in a 16mm × 16mm BGA package optimized for superior thermal dissipation, the RE4630 supports multi-phase parallelization and external frequency synchronization to seamlessly accommodate dynamic load transients of core CPUs and FPGAs. Its robust protection suite incorporates foldback current limiting and output overvoltage safeguards to mitigate system damage under fault conditions. As a fully drop-in compatible alternative to the LTM4630, it offers zero-risk migration for manufacturers seeking high-reliability power solutions, effectively resolving thermal management and stability pain points for high-current power delivery systems.
RE4630: The High-Current Workhorse for Demanding Applications
Robust power delivery and intelligent monitoring form the core design philosophy of the RE4630 DC/DC power module. It integrates a high-efficiency switching controller, power MOSFETs, inductors, and all necessary components within a thermally optimized 16×16×5.01mm BGA package. Supporting a 4.5V~15V input and delivering dual 18A (or single 36A) outputs at 0.6V~1.8V, this module is engineered for high-current CPUs and GPUs. Its integrated differential remote sense amplifier ensures precise voltage regulation at the load, while comprehensive protection mechanisms safeguard against overcurrent, overvoltage, and overtemperature conditions.
Built to withstand the rigors of industrial environments from -55°C to 125°C, the RE4630 is ideal for telecom infrastructure and heavy industrial equipment. Its on-chip temperature diode provides real-time thermal monitoring, and support for frequency synchronization and multi-phase operation allows for easy power scaling. As a fully pin-to-pin compatible alternative to the LTM4630, it offers a zero-risk migration path, enabling manufacturers to enhance system reliability and performance without costly PCB redesigns.
Sajet Step-Down Power IC
- Dual 18A or Single 36A Output
- W ide Input Voltage Range: 4.5V to 15V
- Output Voltage Range: 0.6V to 1.8V
- ±1.5% Maximum Total DC Output ErrorOver Line, Load and Temperature
- Differential Remote Sense Amplifier
- Current Mode Control/Fast TransientResponse
- >Adjustable Switching Frequency
- Overcurrent Foldback Protection
- >Multiphase Parallel with CurrentSharing
- Frequency Synchronization
- Internal Temperature Monitor
- Soft-Start/Voltage Tracking
- Output Overvoltage Protection
- 16mm × 16mm × 5.01mm BGAPackages
RE4630 Dual 18A / Single 36A High-Current DC/DC Step-Down Power Module
The RE4630 is an integrated dual 18A or single 36A step-down DC/DC regulator that integrates switching controllers, power FETs, inductors and all supporting components within a single package. It operates over a 4.5V–15V wide input range and provides two independent outputs with adjustable 0.6V–1.8V output voltage, where each rail can be simply set via one external resistor; its high-efficiency design supplies up to 18A continuous current per channel, requiring only a small quantity of input and output capacitors for peripheral circuits. This module supports external frequency synchronization, multiphase parallel operation and output voltage tracking for orderly power rail sequencing, plus an onboard temperature diode for real-time device temperature monitoring. Adopting high switching frequency and current-mode control architecture, it delivers ultra-fast transient response to line and load variations without compromising system stability, and is equipped with built-in overvoltage and overcurrent protection mechanisms to prevent circuit damage. The RE4630 features full pin-to-pin and BOM-to-BOM compatibility with LTM4630, enabling direct replacement and convenient product upgrade.
Application Schematic
As a dual-channel 18A/single 36A high-current step-down module, RE4630 supports 4.5V~15V input voltage. The input terminal adopts four parallel 22μF capacitors for high-current filtering, and the TEMP pin connects a 120k resistor for built-in temperature diode monitoring. RUN1/RUN2 serve as independent channel enable pins, while TRACK1/TRACK2 support power rail voltage sequencing. The FSET pin sets switching frequency with a 121k resistor, and PHASMD is used for multi-phase configuration. Each independent output channel (VOUT1/VOUT2) is configured with a 60.4k feedback resistor to realize 1.2V fixed output, matched with 100μF and 470μF composite capacitors for low-ripple filtering. INTVcc is fitted with a 4.7μF decoupling capacitor, and the PGOOD pin outputs power-good status through a 10k pull-up resistor. DIFFOUT, DIFFP and DIFFN pins provide differential voltage detection, and dual channels can be parallel-connected to achieve 36A large-current output for high-power industrial power supply scenarios.
APPLICATION
- Telecom and NetworkingEquipment
- Storage and ATCA Cards
- Industrial Equipment
BGA PACKAGE-TOP VIEW
Dual-channel large-size high-density BGA Layout (RE4643 reference drawing)High-density dual independent channels BGA package, arranged in M-A rows & 1-12 columns grid, large-area multi-pin power GND pads are laid on the top region for excellent heat dissipation and large-current carrying capacity.
It integrates dual RUN enable control (RUN1/RUN2), dual compensation loop (COMP1/COMP2), dual feedback sampling (\(V_{FB1}/V_{FB2}\)), dual power good indicator (PGOOD1/PGOOD2), dual switching node SW1/SW2, differential voltage detection pins (DIFFOUT, DIFFP, DIFFN), phase synchronization & PLL configuration pins (PHASMD, MODE_PLLIN), system clock CLKOUT, temperature detection TEMP and external power supply EXTVCC.
Symmetrical dual-channel layout guarantees consistent electrical performance for two power rails, abundant ground pins suppress crosstalk, ideal for GPU, ASIC, high-speed telecom base station dual-power supply systems.
Fields of Application
- Telecom and Networking Equipment:
Powers high-end router line cards and 5G baseband units. The dual 18A (or single 36A) outputs deliver massive current to multicore network processors and switching ASICs, while the differential remote sense amplifier compensates for IR drops across large PCBs to ensure precise core voltage. Multiphase parallel operation enables scalable power for redundant systems in carrier-grade chassis.
Storage and ATCA Cards: - Engineered for AdvancedTCA (ATCA) blade servers and storage controllers. The 16mm×16mm BGA package integrates magnetics and FETs to minimize loop inductance, crucial for sub-1V core rails of Xeon and ARM-based storage CPUs. Onboard temperature monitoring provides real-time thermal telemetry to shelf managers, preventing overheating in densely packed 14-slot ATCA chassis.
Industrial Equipment: - Drives motor control units and industrial PC motherboards. The dual independent rails power both the main processor and FPGA-based motion control logic, isolating noise between domains. Fast transient response handles dynamic loads from servo drives and inverters, while robust protection features (overcurrent, overvoltage) ensure uptime in harsh factory environments with electrical noise and vibration.
Data Center Servers: - Powers memory and I/O subsystems in 1U/2U rack servers. The high current density supports DDR4/DDR5 memory banks and PCIe Gen4/5 lanes, maintaining signal integrity for high-speed data transfer. Frequency synchronization prevents beat frequencies that could interfere with sensitive clock domains in RAID controllers and network interface cards (NICs).
Test and Measurement Equipment: - Provides stable power for FPGA-based digital oscilloscopes and signal generators. The low output noise ensures accurate waveform capture and synthesis, while programmable soft-start prevents inrush current issues during instrument power-up. Pin-to-pin compatibility with LTM4630 allows easy migration from legacy designs, accelerating development of next-gen test hardware.
Core product advantages
The fully integrated structure is the core competitiveness of RE4630 industrial high-current module. All power-level circuits are integrated inside 16mm×16mm BGA packaging optimized for heat dissipation, supporting dual 18A independent output or combined single 36A large current output. Integrated differential remote sampling amplifier and on-chip temperature diode are embedded inside the module, reducing external discrete devices greatly. The optimized packaging structure adapts dense wiring layout of ATCA plug-in cards, industrial heavy-duty equipment and communication base stations, simplifying high-current power board layout.
With high-speed current-mode control design, RE4630 maintains stable voltage output during drastic CPU and FPGA dynamic load changes. It supports 4.5V~15V input and precision 0.6V~1.8V low-voltage output, realizing accurate load-point voltage compensation to restrain line voltage drop. Multi-phase parallel and frequency synchronization functions support large-scale power system expansion, steady performance in -55℃~125℃ full industrial temperature range meets long-time stable operation demands of outdoor base stations and heavy industrial equipment.
RE4630 achieves full pin-to-pin and BOM compatibility with LTM4630, realizing zero-risk direct replacement without board modification and repeated performance verification. Standard BGA welding mode keeps original production process unchanged for manufacturers, cutting product upgrade cycle effectively. Excellent thermal efficiency reduces long-term equipment energy consumption, stable high-current output avoids power supply derating trouble, greatly improving production efficiency for telecom infrastructure and industrial equipment enterprises.
Output voltage adjustment relies on simple peripheral resistance setting, easy parameter configuration for multi-rail industrial power systems. Built-in foldback overcurrent protection, overvoltage protection and temperature monitoring module guard core high-value chips against fault damage. Reserved temperature detection pins and PGOOD signal pins feed real-time temperature and power rail status to upper monitoring system, ensuring automatic fault warning for unattended industrial and communication equipment, easy peripheral matching brings reliable long-term safety performance.
Alternative Names
1.8V Low Voltage High Current Dc-Dc Module / 1.8V High Current Dc-Dc Converter Module / 1.8V Low Voltage Point Of Load Module / 1.8V High Density Pol Power Module / 1.8V Synchronous Buck Regulator Module / 1.8V Step-Down Dc-Dc Power Module / 1.8V Low Output Voltage Buck Module / 1.8V High Output Current Dc-Dc Unit / 1.8V Integrated Dc-Dc Regulator Module / 1.8V Board Mount Buck Power Module / 1.8V Smd Dc-Dc Converter Module / 1.8V Compact High Current Pol Module / 1.8V Miniature Low Voltage Power Module / 1.8V Embedded Dc-Dc Buck Regulator / 1.8V On-Board Voltage Step Down Module / 1.8V High Efficiency Low Voltage Dc-Dc Module / 1.8V Fpga Core Power Supply Module / 1.8V Cpu Core Pol Converter Module / 1.8V Telecom Low Voltage Power Module / 1.8V Server High Current Buck Module / 1.8V Non-Isolated Dc-Dc Regulator Unit / 1.8V All-In-One Synchronous Buck Module / 1.8V Small Form Factor Pol Power Module / 1.8V Low Profile High Current Dc-Dc Module / 1.8V Wide Input Low Output Buck Module / 1.8V Multi-Protection Low Voltage Converter / 1.8V Low Ripple High Current Dc-Dc Module / 1.8V Surface Mount Pol Regulator Module / 1.8V Industrial Control Low Voltage Power Unit / 1.8V Networking Equipment Buck Module / 1.8V Iot High Current Point Of Load Module / 1.8V High Integration Low Voltage Dc-Dc Module / 1.8V Ultra Compact Synchronous Buck Unit / 1.8V High Power Density Dc-Dc Module / 1.8V Single Output Low Voltage Pol Module / 1.8V Low Heat High Current Buck Converter / 1.8V Plug And Play Dc-Dc Step Down Module / 1.8V High Frequency Synchronous Buck Ic Module / 1.8V Thin Profile Smd Low Voltage Power Module / 1.8V Distributed Low Voltage Power Supply Module / 1.8V Micro High Current Dc-Dc Regulator Unit / 1.8V Stable 1.8V Output Buck Power Module / 1.8V Low Emission High Current Pol Module / 1.8V Test Instrument Low Voltage Dc-Dc Module / 1.8V Automation Synchronous Pol Regulator / 1.8V Base Station High Current Buck Module / 1.8V Medical Equipment Low Voltage Converter / 1.8V Single Board Computer Pol Power Module / 1.8V High Load Capacity Dc-Dc Module / 1.8V Narrow Body Low Voltage Buck Unit / 1.8V Motherboard Core Power Pol Module / 1.8V High Reliability Low Voltage Dc-Dc Unit / 1.8V Mini High Current Step Down Regulator / 1.8V On-Card Low Voltage Point Of Load Module / 1.8V Compact Integrated Synchronous Buck Module / 1.8V Low Loss High Current Dc-Dc Converter / 1.8V Space Saving Low Voltage Power Module / 1.8V Synchronous Rectification Buck Power Module / 1.8V Data Communication High Current Pol Unit / 1.8V High Performance Low Voltage Dc-Dc Module / 1.8V Cost Effective High Current Buck Module / 1.8V Wide Temperature Low Voltage Pol Module / 1.8V Small Footprint Dc-Dc Step Down Unit / 1.8V High Stability Synchronous Buck Regulator / 1.8V Embedded System Low Voltage Power Module / 1.8V High Speed Circuit Core Power Module / 1.8V Smt Mount Low Voltage Buck Converter / 1.8V Low Height High Current Pol Module / 1.8V Energy Efficient 1.8V Dc-Dc Unit / 1.8V Board Level Low Voltage Power Regulator / 1.8V Mini Smd High Current Step Down Module / 1.8V Network Switch Core Pol Power Module / 1.8V Low Noise High Current Dc-Dc Regulator / 1.8V Integrated Power Stage Low Voltage Buck Module / 1.8V Non-Isolated High Current Pol Unit / 1.8V Ultra Thin Low Voltage Point Of Load Module / 1.8V High Current Low Voltage Voltage Regulator / 1.8V Compact Distributed Dc-Dc Power Module / 1.8V High Current Low Output Pol Converter / 1.8V Low Voltage High Output Synchronous Buck Module / 1.8V Embedded Pol Dc-Dc Regulator Module / 1.8V Low Drop High Current Dc-Dc Module / 1.8V High Current Core Supply Buck Module / 1.8V Communication Board Low Voltage Power Unit / 1.8V Data Center High Current Pol Module / 1.8V Router Core Step Down Dc-Dc Module / 1.8V High Current Low Voltage Switching Module / 1.8V Integrated Switching Buck Power Module / 1.8V Miniaturized Low Voltage High Current Unit / 1.8V Low Voltage High Current Board Power Module / 1.8V Synchronous Step Down 1.8V Power Module / 1.8V Compact High Current Low Voltage Regulator / 1.8V High Current Low Voltage Embedded Converter / 1.8V Low Voltage High Current Surface Mount Unit / 1.8V Micro Synchronous Low Voltage Dc-Dc Module / 1.8V High Current Low Voltage All-In-One Regulator / 1.8V Low Voltage High Current Server Pol Module / 1.8V Industrial Embedded High Current Buck Unit / 1.8V Low Voltage High Current Onboard Converter / 1.8V High Current Low Voltage Integrated Pol Module / 1.8V Low Voltage High Current Power Supply Unit
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