The EL7554 is a full-feature synchronous 4A step-down regulator capable of up to 96% efficiency. This device operates from 3V to 6V VIN input supply. With internal CMOS power FETs, the device can operate at up to 100% duty ratio, allowing for output voltage range from 0. 8V up to nearly VIN. The adjustable high switching frequency of up to 1MHz enables the use of small components, making the whole converter occupy less than 0. 58 square inch with components on one side of the PCB. The EL7554 operates at constant frequency PWM mode, making external synchronization possible. The EL7554 features soft-start and full start-up control, which eliminates the in-rush current and enables users to control the start-up of multiple converters to any configuration with ease. The EL7554 also offers a ±5% voltage margining capability that allows raising and lowering of the supplies derived from the EL7554 to validate the performance and reliability of system cards quickly and easily during manufacturing testing. A junction temperature indicator conveniently monitors the silicon die temperature, saving designers time in the tedious thermal characterization. An easy-to-use simulation tool is available for download and can be used to modify design parameters such as switching frequency, voltage ripple, ambient temperature, as well as view schematics waveforms, efficiency graphs, and complete BOM with Gerber layout. The EL7554 is available in a 28 Ld HTSSOP package and is specified for operation over the -40°C to +85°C temperature range.


  • Integrated MOSFETs
  • 4A continuous output current
  • Up to 96% efficiency
  • All ceramic capacitors
  • Multiple supply start-up tracking
  • Built-in ±5% voltage margining
  • 3V to 6V input voltage
  • 0.58in2 footprint with components on one side of PCB
  • Adjustable switching frequency to 1MHz
  • Oscillator synchronization possible
  • 100% duty ratio
  • Junction temperature indicator
  • Over-temperature protection
  • Internal soft-start
  • Variable output voltage down to 0.8V
  • Power-good indicator
  • 28 Ld HTSSOP package
  • Pb-free available (RoHS compliant)


  • Point-of-regulation power supplies
  • FPGA Core and I/O supplies
  • DSP, CPU Core, and IO supplies
  • Logic/Bus supplies
  • Portable equipment

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TSSOP-EP Tube 50
Active TSSOP-EP Reel 2500
Active TSSOP-EP Reel 1000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
EL7554 Datasheet 简体中文 Datasheet PDF 823 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN9208: High Frequency Power Converters Application Note PDF 592 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1096: Thermal Design Considerations�EL75XX Application Note PDF 453 KB
AN1101: Designing a High Efficiency DC-DC Converter with the EL75XX Application Note PDF 817 KB
AN1108: Applying Power MOSFET Drivers Application Note PDF 236 KB
AN9210: A New Pspice Subcircuit For The Power MOSFET Featuring Global Temperature Options Application Note PDF 650 KB
AN9209: A Spice-2 Subcircuit Representation For Power MOSFETs Using Empirical Methods Application Note PDF 387 KB
AN7244: Understanding Power MOSFETs Application Note PDF 349 KB
PCN12094 - Alternate Manufacturing Site for Assembly of the Listed Intersil Packaged Products - Amkor Technology, Philippines (ATP) Product Change Notice PDF 98 KB
EL7554IRE-EVAL Gerber Design Files Design File ZIP 221 KB
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB
EL7554, EL7566 Demo Board Software Library ZIP 470 KB
PA14042 - Minimum Line Quantity Change Product Advisory PDF 363 KB
TB458: Converting a Fixed PWM to an Adjustable PWM Other PDF 315 KB
TB418: Using the EL7554 Demo Board Other PDF 477 KB

Boards & Kits

Part Number Title Type Company
EL7554IRE-EVAL Monolithic 4A DC/DC Step-Down Regulator Evaluation Board Evaluation Renesas