RE4623 Ultra-Thin 3A Step-Down Power Module for Industrial & Automotive High-Precision Power Supply

RE4623 high-density DC/DC power module targets stable and low-ripple power conversion demands of automotive electronics, industrial control and medical diagnostic equipment manufacturers. Users can flexibly configure output voltage value, switching frequency and soft-start timing according to actual chip operating parameters and load characteristics. The module supports frequency synchronization and multi-phase current sharing to match high-precision power rail requirements, and reserves accurate voltage and current data feedback for factory MES system monitoring. Compact BGA ultra-thin package and high-reliability wide-temperature performance fully adapt to small-size installation and long-term continuous production application scenarios.
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RE4623 Ultra-Thin 3A Single Output Step Down Power Module for Industrial and Automotive Precision Power Conversion

RE4623 high-performance 3A single output step down power module is customized for high-stability point-of-load voltage conversion of industrial automation, telecom networking and automotive electronic systems. It adopts fully integrated BGA packaging design that embeds controllers, power MOSFETs, inductors and all supporting components, supporting 4V~20V wide input voltage and adjustable 0.6V~5.5V step-down output with continuous 3A single-channel load capacity. Built-in current-mode control delivers ultra-fast transient response for dynamic load changes, while multi-protection mechanisms including overvoltage, overcurrent and overtemperature ensure long-term stable operation. The module supports external frequency synchronization and voltage tracking, and reserves real-time operating parameter feedback ports to cooperate with factory MES system for intelligent power monitoring and quality traceability.

 

Different from traditional discrete step-down circuit solutions on the market, RE4623 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 industrial control, medical equipment and vehicle-grade power supply standards. Featuring pin-to-pin and BOM compatibility with LTM4623, 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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Integrated All-in-One Design for Streamlined Power System Integration of RE4623 Step-Down Module

The fully integrated all-in-one structure forms the core design advantage of RE4623 DC/DC power modules. It integrates built-in switching controllers, power FETs, inductors and full peripheral passive components inside the compact 6.25×6.25×2.42mm package, supporting 4V~20V wide input and adjustable 0.6V~5.5V output single-channel 3A continuous current output. This high level of integration eliminates complicated peripheral matching work, only requiring a few input and output capacitors to complete the power supply circuit design, while built-in multi-protection circuits guarantee chip-level operation safety. The internal temperature detection pin feeds real-time operating temperature data to the equipment MES monitoring platform, and the PGOOD power good signal pin judges power rail stability to avoid system crashes caused by abnormal voltage fluctuations.
Meeting the industrial wide-temperature standard from -55℃ to 125℃, RE4623 is perfectly compatible with FPGA, DSP, ASIC and various low-voltage digital chip power rails without extensive secondary development. Designers complete the power supply layout quickly via standard BGA soldering, while system integrators achieve rapid power expansion through external frequency synchronization and multiphase parallel functions. It supports pin-to-pin replacement of LTM4623 with complete Bom compatibility, greatly reducing the PCB redesign cycle brought by frequent power demand upgrades of communication and automation equipment manufacturers.

Sajet Step-Down Power IC

  • >Ultrathin, Complete Solution in< 1cm2
  • 3A DC Output Output
  • W ide Input Voltage Range: 4V 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/Voltage Tracking
  • Output Overvoltage, Overcurrent andOvertemperature Protection
  • 6.25mm × 6.25mm × 2.42mm BGAPackages

RE4623｜3A Step-Down DC/DC Regulator Complete Power Solution in a 6.25mm × 6.25mm BGA Package

The RE4623 is an integrated 3A synchronous step-down DC/DC switching regulator housed in an ultra-compact 6.25mm × 6.25mm ×2.42mm BGA package, which integrates switching controllers, power FETs, inductors and all peripheral supporting components inside the package. Operating within a 4V–20V wide input voltage range, its output voltage can be precisely configured from 0.6V to 5.5V merely via one external resistor, and the high-efficiency architecture can steadily provide up to 3A continuous output current, requiring only a small number of input and output capacitors for peripheral application. This IC supports external frequency synchronization, multiphase parallel operation and power rail voltage tracking; paired with high switching frequency and current-mode control architecture, it achieves ultra-fast transient response against line voltage and load fluctuations while maintaining system stability. Comprehensive safety protections including overvoltage, overcurrent and overtemperature protection are embedded for reliable operation, and the RE4623 features pin-to-pin and BOM-to-BOM compatibility with LTM4623 for convenient replacement and upgrading.

Application Schematic

This schematic shows the typical 1.5V/3A application circuit of RE4623 synchronous step-down regulator, supporting 4V–20V input voltage. A 10μF input capacitor stabilizes the input rail, while VIN2, SVIN and RUN pins connect to the input supply. The FB pin uses a 40.2kΩ resistor to fix the 1.5V output, with a 47μF capacitor filtering output ripples. The TRACK/SS pin with a 0.1μF capacitor achieves soft-start to restrain surge current. Reserved pins support frequency setting, multi-phase parallelism and clock synchronization. Common SGND and GND grounding ensures stable operation, enabling the chip to continuously supply 3A current for electronic equipment.

APPLICATION

  • Telecom and Networking Equipment
  • PCIe and Backside PCB Mounting
  • Data Storage Rack Units and Cards
  • Industrial Equipment

BGA PACKAGE-TOP VIEW

This figure displays the top-view pin layout of RE4623 BGA package, marked with horizontal A-E and vertical 1-5 coordinates for convenient PCB layout design.

VIN, SVIN serve as power input terminals, and VOUT is the regulated output port. Control pins including RUN, FB, COMP, PHMODE and TRACK/SS realize enable control, feedback regulation, loop compensation and soft-start. FREQ, CLKIN, CLKOUT support frequency setting and multi-phase clock synchronization. PGOOD monitors output voltage status, while SGND and GND offer stable grounding. MODE and INTVCC are prepared for mode selection and internal power management, fitting compact layout demands of networking, storage and industrial devices.

Fields of Application

  • New Energy Vehicle Power Battery & BMS Module Power Supply

Suitable for stable power supply of EV BMS high-voltage control boards and battery management modules. 4V~20V wide input range adapts vehicle battery voltage fluctuation, current-mode fast transient response resists instantaneous voltage surge. ±1.5% high precision output guarantees long-term stable sampling detection of BMS, ultra-small BGA packaging greatly saves PCB layout space for compact battery modules, fully compliant with IATF16949 automotive quality control requirements.

  • Automotive ECU & Sensor Electronic Control Unit Power Supply

Customized low-noise power solution for Tier1 automotive electronic control units and sensors. High efficiency continuous 3A output meets peak power demand of automotive chips, soft-start function effectively suppresses power-on inrush current to protect sensitive sensors. Multiphase parallel design supports multi-ECU centralized power distribution, excellent thermal stability ensures reliable operation under complex vehicle temperature conditions.

  • Industrial Inverter & Transformer Control Board Power Supply

Applied to auxiliary power supply of medium-high power inverters, transformers and drive control boards. Strong anti-interference performance adapts harsh industrial electromagnetic environment, wide input voltage tolerates grid voltage instability. Ultra-fast load transient response stabilizes voltage output during inverter frequent switching, compact packaging is convenient for dense wiring layout inside industrial equipment.

  • New Energy Commercial Vehicle On-Board Charger Power Supply

High-reliability power chip for commercial vehicle on-board charger control modules. Wide operating temperature range matches extreme working environment of trucks and engineering vehicles, overvoltage, overcurrent and overtemperature multi-protection mechanism avoids power failure under harsh conditions. Pin-to-pin compatibility facilitates batch upgrading and replacement of old-generation power chips for large-scale commercial vehicle manufacturers.

  • Aftermarket Modified Electronic Small-Batch Prototype Power Supply

Ideal for small-batch development of modified automotive power supplies, industrial prototypes and customized sensors. Simple peripheral circuit only needs few capacitors, fast parameter debugging and program switching shorten prototype verification cycle. Low layout cost, stable and consistent output performance, perfectly fit small-batch trial production and personalized electronic modification projects.

Core product advantages

Built to Endure: Ultra-Reliable RE4623 DC/DC Power Module

Industrial-grade RE4623 buck regulator delivers reliable long-term stability. Comprehensive OVP, OCP and OTP protection safeguards the chip against surges and overloads. Its compact BGA package passes rigorous aging tests, keeping ±1.5% precise output during continuous operation. The 4V–20V wide input range accommodates vehicle, industrial and telecom voltage fluctuations, offering steady power for long-life electronic devices

Precision Regulation: Redefining Power Supply Stability Standards

Enter a new stage of high-precision power conversion with RE4623 DC/DC module. Different from ordinary power chips with slow response, current-mode control technology achieves ultra-fast transient response against line and load changes. The precision feedback circuit supports adjustable 0.6V–5.5V output via single external resistor, realizing highly uniform voltage output. Multiphase parallel and external clock synchronization effectively restrain output ripple, greatly lifting power supply stability for high-precision chips, and setting new benchmarks for miniature power regulation accuracy.

Maximize Output: High-Efficiency Compact RE4623 Power Solution

Optimize layout cost and power efficiency with the RE4623 integrated step-down module. Its highly integrated structure integrates the controller, power FET and auxiliary circuits, greatly reducing peripheral components and limiting the layout area within 1cm². The high-efficiency structure delivers stable 3A continuous output and improves conversion efficiency. Simplified peripheral circuits lower material costs and PCB layout difficulty, and bubble-free packaging reduces failure rates, making it well-suited for mass production of high-density electronic products.

Simplicity in Action: User-Friendly RE4623 Easy Deployment Module

High-performance power conversion can be deployed easily with RE4623 DC/DC module. Clear pin definition and standardized pinout simplify circuit design; the chip features pin-to-pin compatibility with mainstream classic models, enabling direct replacement without large-scale circuit revision. Soft-start, voltage tracking and frequency configuration can be quickly set via simple peripheral devices, requiring only minimal training for engineers to finish parameter debugging. The standardized BGA packaging fits automatic SMT mounting, bringing industrial-grade stable power supply capability to various equipment with low layout difficulty and no complex professional operation.

Miniature Power, Perfectly Engineered

Discover the pinnacle of miniature power conversion with Sajet’s RE4623 integrated DC/DC step-down module. Operating at an industry-leading ±1.5% output precision, it ensures ultra-stable power delivery for even the most sensitive electronic components. With an ultra-fast transient response and support for a 3A continuous output, every power conversion meets the highest performance standards. The highly integrated BGA package, compressing the application area below 1cm², enables seamless integration into high-density PCB layouts, while the pin-to-pin compatibility with mainstream classic models offers intuitive deployment and effortless upgrades. From industrial robotics to high-density communication equipment, trust Sajet to deliver flawless power regulation solutions every time. Contact us today to discuss your application requirements

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  • “We have integrated Sajet’s RE4623 DC/DC step-down modules into our latest generation of industrial robotics control boards, and the performance has been exceptional. The module’s ±1.5% output precision and ultra-fast transient response ensure stable power delivery to our sensitive FPGA and DSP chips, even under rapid load changes. The compact BGA package, smaller than 1cm², was a critical factor in optimizing our PCB layout for high-density designs. Furthermore, the pin-to-pin compatibility with legacy models allowed for a seamless upgrade without costly board re-spins, significantly accelerating our time-to-market. Sajet’s technical team provided excellent support during the design-in phase, making them a reliable partner for our high-performance power needs.”

  • “We have partnered with Sajet for over a year to integrate the RE4623 DC/DC step-down modules into our industrial control systems. The module’s ±1.5% output precision and ultra-fast transient response fully comply with our strict power stability standards. The compact BGA package, smaller than 1cm², significantly optimized our high-density PCB layout. Sajet’s technical team provided seamless support during the design-in phase, and their pin-to-pin compatibility allowed for a smooth upgrade without costly board re-spins, ensuring our rapid time-to-market.”

  • “Choosing Sajet’s RE4623 module was a strategic decision for our latest robotics project. Beyond its excellent 3A continuous output and high conversion efficiency, what truly impressed us was the simplified peripheral design, which greatly reduced our BOM costs and assembly complexity. Sajet’s engineers responded quickly to our technical queries, making the deployment process incredibly smooth. They have proven to be a reliable partner who truly understands the challenges of mass manufacturing.”

  • “As a power design engineer, I highly recommend the Sajet RE4623. The current-mode control technology delivers exceptional line and load regulation, keeping the output ripple minimal for our sensitive FPGA chips. The adjustable 0.6V–5.5V output via a single resistor makes prototyping incredibly fast. We were able to replace our legacy power solution with the RE4623 without any major circuit revisions, saving us weeks of testing and validation time. A truly outstanding miniature power solution.”

Alternative Names

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