Datasheet4U Logo Datasheet4U.com

EL7551 - Monolithic 1Amp DC:DC Step-down Regulator

General Description

CONDITIONS MIN TYP VREF VREFTC VREFLOAD VRAMP IOSC_CHG IOSC_DIS IVDD+VDRV IVDD_OFF VDD_OFF VDD_ON TOT THYS ILEAK ILMAX RDSON RDSONTC VFB VFB_LINE VFB_LOAD VFB_TC IFB VEN_HI VEN_LO IEN Reference Accuracy Reference Temperature Coefficient Reference Load Regulation Oscillator Ramp Amplitude Oscilla

Key Features

  • Integrated synchronous MOSFETs and current mode controller.
  • 1A continuous output current.
  • Up to 95% efficiency.
  • 4.5V to 5.5V input voltage.
  • Adjustable output from 1V to 3.8V.
  • Cycle-by-cycle current limit.
  • Precision reference.
  • ±0.5% load and line regulation.
  • Adjustable switching frequency to 1.2MHz.
  • Oscillator synchronization possible.
  • Internal soft start.
  • Over temperature protection.

📥 Download Datasheet

Datasheet Details

Part number EL7551
Manufacturer Renesas
File Size 549.54 KB
Description Monolithic 1Amp DC:DC Step-down Regulator
Datasheet download datasheet EL7551 Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
EL7556AC Programmable CPU Power Supply Unit Elantec Semiconductor
EL7556B Integrated Adjustable 6 Amp Synchronous Switcher Intersil Corporation
EL7556BC Integrated Adjustable 6 Amp Synchronous Switcher Elantec Semiconductor
EL7556D Integrated Adjustable 6 Amp Synchronous Switcher Intersil Corporation
EL7558BC Integrated Adjustable 8 Amp Synchronous Switcher Elantec Semiconductor

Other Datasheets by Renesas

Part Number Description
EL7554 Monolithic 4A DC/DC Step-Down Regulator
EL7512 High Frequency PWM Step-Up Regulator
EL7513 White LED Step-Up Regulator
EL7515 High Frequency PWM Step-Up Regulator
EL7516 600kHz / 1.2MHz PWM Step-Up Regulator

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
NOT RECOMMENDED FOR NEW DESIGNS SEE EL7531 OR EL7536 EL7551 Monolithic 1Amp DC:DC Step-down Regulator DATASHEET FN7291 Rev 1.00 March 21, 2006 The EL7551 is an integrated, synchronous step-down regulator with output voltage adjustable from 1.0V to 3.8V. It is capable of delivering 1A continuous current at up to 95% efficiency. The EL7551 operates at a constant frequency pulse width modulation (PWM) mode, making external synchronization possible. Patented on-chip resistorless current sensing enables current mode control, which provides cycle-by-cycle current limiting, over-current protection, and excellent step load response. The EL7551 is available in a fused-lead 16-pin QSOP package. With proper external components, the whole converter fits into a less than 0.4 in2 area.