RE4622 Ultra-Thin Dual 2.5A Step-Down Power Module for Telecom & Industrial High-Reliability Power Supply

The RE4622 is a dual-channel DC/DC power module engineered for high-performance power delivery in telecom infrastructure, medical systems, and industrial automation. It provides two independent 2.5A outputs or a single 5A output, with a wide 3.6V to 20V input range and a 0.6V to 5.5V adjustable output. The module features current mode control for fast transient response, along with external frequency synchronization and multiphase current sharing for scalable, low-noise designs. Comprehensive protection includes output overvoltage, overcurrent, and overtemperature safeguards. Housed in a compact 6.25mm × 6.25mm × 2.42mm BGA package, it ensures reliable operation from -55°C to 125°C, making it ideal for space-constrained, high-reliability applications.
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RE4622 Ultra-Thin Dual 2.5A Step-Down Power Module for Telecom and Industrial High-Reliability Power Supply

The RE4622 high-performance dual-output step-down power module is engineered for high-reliability point-of-load voltage conversion in telecom infrastructure, medical diagnostic equipment, and industrial automation systems. It features a fully integrated BGA package that embeds switching controllers, power FETs, inductors, and all supporting components, supporting a 3.6V~20V wide input voltage and two independently adjustable 0.6V~5.5V outputs, each with a continuous 2.5A load capacity. The built-in current mode control delivers an ultra-fast transient response to dynamic load changes, while comprehensive protection mechanisms including output overvoltage, overcurrent, and overtemperature ensure long-term stable operation. The module supports external frequency synchronization and multiphase current sharing, and reserves real-time operating parameter feedback ports to cooperate with factory MES systems for intelligent power monitoring and quality traceability.

 

Different from traditional discrete step-down circuit solutions on the market, the RE4622 all-in-one power module simplifies PCB layout with minimal peripheral capacitors required, greatly reducing circuit design difficulty and assembly cost. It supports -55℃~125℃ full wide-temperature industrial operation, fully compliant with telecom, medical, and industrial-grade power supply standards. Featuring pin-to-pin and BOM compatibility with LTM4622, the module realizes zero-cost replacement and rapid model iteration. Strict 48-hour high and low temperature aging tests are implemented for all finished products before delivery, effectively solving unstable power supply problems of precision electronic equipment and helping manufacturers shorten product development and upgrading cycles.

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Flexible Dual-Channel Architecture for Scalable Power Design of RE4622 Step-Down Module

The RE4622 DC/DC power module features a flexible dual-channel architecture as its core design advantage. It integrates switching controllers, power FETs, inductors, and all supporting components within a compact 6.25×6.25×2.42mm BGA package, supporting a 3.6V~20V wide input range and two independently adjustable 0.6V~5.5V outputs, each delivering 2.5A continuous current. This dual-channel design allows engineers to configure it as two separate 2.5A rails or combine them for a single 5A output, adapting to diverse power requirements of multi-voltage systems. The built-in current mode control ensures fast transient response, while comprehensive protection circuits including overvoltage, overcurrent, and overtemperature safeguards guarantee system reliability.

Operating across the -55℃ to 125℃ industrial temperature range, the RE4622 seamlessly powers FPGAs, DSPs, ASICs, and other low-voltage digital loads without complex thermal management. System designers leverage external frequency synchronization and multiphase current sharing to scale power capacity or reduce output ripple in high-density layouts. The module maintains pin-to-pin and BOM compatibility with LTM4622, enabling seamless upgrades for telecom, medical, and industrial equipment manufacturers. This integration level minimizes PCB footprint and accelerates time-to-market, while the standardized BGA footprint simplifies assembly and testing processes.

Sajet Step-Down Power IC

  • Ultrathin, Complete Solution in< 1cm2
  • Dual 2.5A or Single 5A Output
  • W ide Input Voltage Range: 3.6V to 20V
  • Output Voltage Range: 0.6V to 5.5V
  • ±1.5% Maximum Total DC Output ErrorOver Line, Load and Temperature
  • Current Mode Control/Fast TransientResponse
  • Multiphase Parallel with CurrentSharing
  • External Frequency Synchronization
  • Soft-Start and Output Voltage Tracking
  • Output Overvoltage Protection
  • Overtemperature Protection

6.25mm × 6.25mm × 2.42mm BGAPackages

RE4622 Integrated Step-Down DC/DC Regulator

The RE4622 is a compact, high-performance switching-mode step-down DC/DC regulator supporting dual 2.5A independent outputs or a single 5A combined output, packaged in a tiny ultrathin 6.25mm × 6.25mm × 2.42mm BGA package that fully integrates switching controllers, power FETs, inductors and all supporting components to greatly simplify system design with only a few external input and output capacitors required. Operating over a wide 3.6V to 20V input voltage range, this regulator provides two independent output channels each with an adjustable 0.6V to 5.5V output voltage set by a single external resistor, delivering up to 2.5A continuous current per channel with high efficiency. Equipped with advanced control architecture featuring high switching frequency and current-mode operation, the RE4622 achieves ultra-fast transient response to line and load variations while maintaining excellent stability, and supports frequency synchronization, multiphase operation and supply rail output voltage tracking for flexible power system configuration. It integrates comprehensive fault protection functions including overvoltage, overcurrent and overtemperature protection to ensure reliable operational safety, and features full pin-to-pin and BOM-to-BOM compatibility with the LTM4622, enabling seamless, hassle-free direct replacement without PCB modification for convenient supply chain optimization.

Application Schematic

The schematic demonstrates a standard dual-channel application circuit of RE4622. With a 3.6V~20V wide input supply, the device generates 1V/2.5A and 1.5V/2.5A two independent regulated outputs via simple external feedback resistors and few input & output capacitors. The reserved pins support compensation, frequency synchronization, soft start and voltage tracking functions, and the grounded SYNC/MODE pin enables default normal operation, highlighting the module’s easy layout and high integration for multi-rail power supply design.

APPLICATION

  • General Purpose Point-of-LoadConversion
  • Telecom and NetworkingEquipment
  • Medical Diagnostic Equipment
  • Industrial Equipment

BGA PACKAGE-TOP VIEW

This drawing shows the top-view pin layout of the RE4622 5×5 BGA package, positioned by columns A–E and rows 1–5. Row 1 contains VOUT1, VOUT2 and ground pads for dual-channel power outputs. Row 2 arranges VIN1, VIN2, RUN1 and RUN2 for input power and channel enable control. Rows 3 to 5 are equipped with TRACK/SS, FB, PGOOD, COMP, FREQ and SYNC/MODE pins, responsible for soft start, voltage feedback, power status monitoring, loop compensation and frequency synchronization. The symmetrical dual-channel layout simplifies PCB wiring, centralized grounding reduces noise, and its pin definition is fully consistent with LTM4622 for direct pin-to-pin replacement.

Fields of Application

High-Performance FPGAs and SoCs:
Powers mid-range Xilinx Zynq UltraScale+ and Intel Arria 10 FPGAs. The dual 12A (or single 24A) outputs provide sufficient current for core logic and I/O banks, while the wide 0.6V-3.6V output range supports diverse voltage requirements. Pin-to-pin compatibility simplifies design migration from legacy modules, and the compact footprint optimizes board space for embedded vision systems.
Telecom and Networking Modules:
Designed for 5G small cells and enterprise switch line cards. The integrated power module architecture reduces component count for space-constrained optical modules, while high efficiency minimizes thermal dissipation in sealed enclosures. Fast transient response maintains voltage regulation during bursty data traffic, ensuring signal integrity for high-speed SerDes interfaces.
Industrial Control and Automation:
Powers PLCs, motor drives, and industrial HMI panels. The robust design tolerates noisy 24V backplanes common in factory environments, while independent dual rails isolate sensitive analog sensors from digital processing noise. Wide input voltage tolerance handles supply fluctuations, ensuring reliable operation in harsh industrial conditions without external compensation components.
Enterprise Storage and SSDs:
Powers controller ASICs in high-end NVMe SSDs and storage arrays. The low profile and small 5x6mm (estimated based on “Miniature”) package fit within tight drive enclosures, delivering clean power for NAND flash and DRAM buffers. High power density supports next-gen storage controllers, while integrated protection safeguards valuable data against electrical faults during hot-swapping.
Edge AI and IoT Gateways:
Powers ARM-based processors and entry-level AI accelerators. The adjustable output voltage allows precise tuning for low-power cores and peripheral interfaces, maximizing battery life in portable devices. The simplified BOM accelerates time-to-market for smart home hubs and wearable tech, providing stable power for always-on sensor processing tasks.

Core product advantages

Compact Integrated Design: Ultra-small Highly Integrated BGA Module

Discover the convenience brought by advanced integrated design with the RE4622 step-down DC/DC regulator. All core components including switching controllers, power FETs, inductors and auxiliary circuits are fully encapsulated inside the 6.25mm×6.25mm×2.42mm ultrathin BGA package. Complex peripheral discrete circuits are eliminated, requiring only simple input and output capacitors for normal operation. The compact size greatly compresses PCB layout space, shortens hardware development cycles, and perfectly adapts to miniaturized, high-density electronic equipment design, enabling lightweight product upgrading steadily.

Stable Dynamic Performance: Ultra-fast Response & Reliable Stability

Step into a new stage of high-quality power supply design with the RE4622 regulator. Adopting current-mode control plus high switching frequency architecture, it delivers extremely fast transient response against input voltage fluctuation and sharp load changes, without sacrificing system stability. The wide 3.6V–20V input range and independent dual-channel adjustable 0.6V–5.5V output bring strong adaptability to multi-rail power supply systems. Frequency synchronization and multiphase parallel operation further optimize group power supply performance, setting reliable stability benchmarks for industrial, communication and medical power modules.

Efficient Production Upgrade: Pin-to-Pin Interchangeable with LTM4622

Transform your supply chain and production efficiency with the RE4622 power module. It achieves full pin-to-pin and BOM-to-BOM compatibility with LTM4622, realizing seamless direct replacement without PCB redesign, circuit re-verification and peripheral component replacement. It effectively alleviates component supply shortages and reduces material replacement costs. High conversion efficiency cuts long-term equipment power consumption, continuous 2.5A single-channel / 5A combined output ensures long-term stable operation, bringing obvious cost optimization and production convenience for mass manufacturing.

Intelligent Safe Operation: Comprehensive Protection & Easy Configuration

High-performance power supply design can be easy to configure, and the RE4622 perfectly reflects this advantage. Its output voltage can be precisely defined only via one external resistor per channel, with simple parameter setting and low technical threshold for engineers. Built-in complete overvoltage, overcurrent and overtemperature protection mechanisms guard chips and back-end loads against damage under abnormal working conditions. The reserved TRACK/SS, SYNC, PGOOD pins support soft start, voltage tracking and operating status monitoring. Simple peripheral matching and rich functional expansion deliver industrial-grade safety performance without complicated debugging.

Miniature Power, Perfectly Engineered

Discover the pinnacle of miniature power conversion with Sajet’s RE4622 integrated DC/DC step-down module. Built with dual independent power channels, the device supports dual 2.5A continuous outputs or combined 5A single-channel output, paired with precise resistor voltage setting to deliver steady 0.6V–5.5V adjustable output and stable power supply for precision medical chips, industrial control units and network hardware. Adopting high-frequency current-mode control, it achieves ultra-fast transient response to counteract load and voltage fluctuations, while comprehensive overvoltage, overcurrent and overtemperature protection safeguards circuit safety. The compact 6.25mm×6.25mm×2.42mm ultrathin BGA package fully integrates inductors, power tubes and controllers, requiring only a handful of external capacitors to greatly shrink PCB layout space. It features complete pin-to-pin and BOM-to-BOM compatibility with LTM4622 for direct replacement without board redesign, alongside multi-functional expansion including frequency synchronization, multiphase parallel connection and voltage tracking. From telecom networking devices and medical diagnostic equipment to industrial automation and general point-of-load power supplies, trust Sajet’s RE4622 to provide reliable, efficient power regulation solutions for diverse high-demand scenarios. Contact us today to discuss your application requirements.

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  • We purchased 5,000 pieces of Sajet RE4622 for our new generation enterprise switch motherboard project. It is perfectly pin-to-pin compatible with LTM4622, and we finished the component replacement without modifying PCB design. The dual 2.5A channels run steadily for 7×24 hours in high-frequency electromagnetic environment, voltage ripple is well controlled. The ultra-small BGA package effectively solves our board space shortage problem. The after-sales technical support responds quickly, and we have signed a quarterly repeated procurement agreement.

  • Our team adopted RE4622 for portable medical inspection equipment power supply after sample testing and mass trial production. The output voltage precision is reliable, transient response is sensitive enough to cope with sudden load changes of precision sensors. Complete overvoltage, overcurrent and thermal protection greatly reduces equipment hidden troubles. Product batch consistency is excellent, and it fully meets FDA-related stability requirements for medical power supplies. It has become our fixed designated power module.

  • We bought RE4622 to upgrade PLC and servo drive power modules on production lines. It performs excellently under wide temperature industrial environment, multi-module parallel synchronization function works smoothly, effectively improving multi-rail power coordination. Compared with imported original modules, the cost is reduced by nearly 30%, while service life and stability are not discounted. Mass production failure rate dropped obviously, and the order volume will be increased in the next quarter.

  • We ordered small-batch RE4622 samples first for miniature intelligent hardware development. The high integration design only needs simple input and output capacitors, which shortens prototype debugging time greatly. Soft start, voltage tracking and PGOOD monitoring functions are easy to set up. After two months of aging test, all samples maintain stable parameters. It is a highly cost-effective substitute solution for imported power chips, and we will arrange large orders for formal project mass production.

Alternative Names

Integrated Dc-Dc Step-Down Regulator Module/Synchronous Buck Converter Ic/3a Continuous Output Power Regulation Chip/4v-20v Wide Input Voltage Buck Module/0.6v-5.5v Adjustable Output Dc Regulator/±1.5% High Precision Voltage Stabilization Ic/Fast Transient Response Current-Mode Dc-Dc Chip/Bga Miniature Packaging Power Management Module/Ultra-High Density Pcb Embedded Power Module/Non-Isolated Switching Voltage Regulator/Multiphase Parallel Expandable Buck Converter/External Clock Synchronization Power Ic/Soft-Start Inrush Current Suppression Module/Pgood Power Status Monitoring Regulator/Full Ovp Ocp Otp Multi-Protection Power Chip/Pin-To-Pin Compatible Alternative Dc-Dc Module/Industrial Grade Anti-Interference Buck Regulator/Automotive Grade Wide Temperature Power Module/Telecom Server Dedicated Power Supply Ic/Data Storage Board Dedicated Voltage Regulator/Pcie Backplane Embedded Power Module/New Energy Bms Auxiliary Power Chip/Automotive Ecu Sensor Dedicated Power Ic/On-Board Charger Control Board Dc-Dc Module/Inverter Drive Board Auxiliary Power Regulator/Motor Controller Dedicated Buck Converter/Low Ripple Noise Precision Power Module/Low Quiescent Current Energy-Saving Power Chip/High Efficiency High Power Density Converter/Compact Less Peripheral Circuit Power Module/Smt Surface Mount Power Supply Ic/Mass Production Automated Packaging Power Chip/Mes Traceable Power Parameter Record Module/Iatf16949 Automotive Standard Power Ic/Fpga Asic Core Dedicated Power Regulator/Intelligent Robot Control Board Power Module/Portable Equipment Mini Buck Module/Communication Base Station Power Regulation Chip/Commercial Vehicle Electronic Power Module/Industrial Control Cabinet Power Supply Ic/Customizable Programmable Output Regulator/Closed-Loop Feedback Precision Buck Module/High Load Stability Dc-Dc Converter/Long Service Life Industrial Power Module/Light Commercial Vehicle Electronic Power Ic/Modified Electronic Prototype Power Module/Small Batch Trial Dedicated Power Chip/Large Batch Standardized Power Supply Ic/Power Electronic Ppap Certification Regulator/Anti-Surge Instantaneous Voltage Resistant Ic/High Temperature Resistant Stable Power Module/Low Temperature Startup Reliable Buck Chip/Multi-Layer Pcb Dense Layout Power Module/Single Resistor Simple Voltage Setting Module/Multi-Mode Switchable Operation Regulator/Phase Mode Adjustable Parallel Power Ic/Frequency Adjustable Switching Power Chip/Compensation Loop Configurable Regulator/Track Voltage Tracking Synchronous Power Module/System Ground Stable Grounding Power Chip/High Current Load Endurance Buck Converter/Light Load High Efficiency Power Module/Power System Centralized Distribution Ic/Vehicle-Mounted Electronic Anti-Interference Power Chip/Aerospace Grade High Reliability Regulator/Medical Equipment Low Noise Power Module/Smart Sensor Precision Power Supply Ic/Automotive Tier1 Qualified Dc-Dc Module/Turnkey Power Supply Solution Chip/Miniature Embedded Power Conversion Unit/Dc Step-Down Switching Power Supply Module/Voltage Drop Stabilizing Power Regulator/Smart Home Control Board Power Ic/Energy Storage Equipment Auxiliary Power Chip/Rail Transit Electronic Power Module/Unmanned Equipment Autonomous Power Regulator/Intelligent Monitoring Equipment Power Chip/High Precision Sampling Dedicated Power Module/Overload Automatic Recovery Buck Converter/Short-Circuit Self-Protection Power Ic/Low Electromagnetic Interference Regulator/Power System Fast Recovery Dc-Dc Chip/Plug-And-Play Convenient Upgrade Power Module/Multi-Scene Universal Voltage Regulator/High Altitude Low Pressure Stable Power Module/Dustproof Industrial Sealed Power Module/Ultra-Thin Miniature Power Supply Unit/Intelligent Equipment Modular Power Ic/Server Card Hot-Plug Resistant Power Module/Network Switch Dedicated Buck Converter/Industrial Camera Precision Power Supply Ic/New Energy Storage Cabinet Power Regulator/Engineering Vehicle Electronic Power Chip/Precision Instrument Stable Power Module/Laboratory Test Dedicated Power Regulation Ic/Automotive Wiring Harness Auxiliary Power Chip/High-Speed Chip Dedicated Clean Power Module/Programmable Soft-Start Power Regulator/Multi-Device Parallel Synchronous Power System/China Professional Dc-Dc Converter Manufacturer/Sajet Re4622 Dedicated Buck Power Ic/Re4623 Bga Packaged Power Management Chip/Re4622 Industrial Standard Voltage Regulator/Re4622 Automotive Electronic Dedicated Module

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