EL7558BC

EL7558BC EL7558BC Integrated Adjustable 8 Amp Synchronous Switcher Features EL7558C/EL7558AC pincompatible Improved temperature and voltage ranges 8A continuous load current Precision internal 1% reference 1.0V to 3.8V output voltage Internal power MOSFETs >90% efficiency Synchronous switching Adjustable slope compensation Over-temperature indicator Pulse-by-pulse current limiting Operates up to 1MHz 1.5% typical output accuracy Adjustable oscillator with sync Remote enable/disable Intel P54- and P55-compatible VCC2DET interface Internal soft-start General Description The EL7558BC is an adjustable synchronous DC:DC switching regulator optimized for a 5V input and 1.0V-3.8V output. By combining integrated NMOS power FETS with a HSOP package the EL7558BC can supply up to 8A continuous output current without the use of external power devices or externally attached heat sinks, thereby minimizing design effort and overall system cost. On-chip resistorless current sensing is used to achieve stable, highly efficient, current-mode control. The EL7558BC also incorporates the VCC2DET function to directly interface with the Intel P54 and P55 microprocessors. Depending on the state of VCC2DET, the output voltage is internally preset to 3.50V or a user-adjustable voltage using two external resistors. In both internal and external feedback modes the active-high PWRGD output indicates when the regulator output is within ±10% of the programmed voltage. ...