The EL7554 is a high-efficiency full-featured synchronous 4A step-down regulator. This document lists the completed schematic diagram and BOM, as well as the layout. With components on one side of the PCB, the complete converter occupies less than 0.58in2 of space. Please refer to the datasheet for the application of features. This demo board is preset to 1.8V for VO and operates at 600kHz switching frequency. The measured crossover frequencies are around 50kHz with the compensation values.

Features

  • 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
  • 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
  • Pb-free available (RoHS compliant)

Applications

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

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
EL7554 Simplified Chinese Datasheet Datasheet PDF 766 KB
EL7554 Datasheet Datasheet PDF 823 KB
Application Notes & White Papers
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
AN1108: Applying Power MOSFET Drivers Application Note PDF 236 KB
AN1101: Designing a High Efficiency DC-DC Converter with the EL75XX Application Note PDF 817 KB
Downloads
EL7554IRE-EVAL Gerber Design Files Design File ZIP 221 KB
Other
TB458: Converting a Fixed PWM to an Adjustable PWM Other PDF 315 KB
TB418: Using the EL7554 Demo Board Other PDF 477 KB