LX1912

www.DataSheet4U.com TM ® LX1912 VREF @ 800mV, 1.0A, 1.2MHz PWM P RODUCTION D ATA SHEET DESCRIPTION KEY FEATURES ƒ Internal Reference 800mv ±2% Accuracy (Line and Temp.) ƒ 4.0V to 6.0V Input Range ƒ Internal Soft Start ƒ Adj. Output From 0.8V to 90% of VIN ƒ Output Current up to 1.0A ƒ Quiescent Current < 550μA, Typical @ 23°C ƒ 1.2MHz PWM Frequency ƒ Over Voltage Protection APPLICATIONS WWW . Microsemi . C OM The LX1912 operates as a Current Mode PWM Buck regulator that switches to PFM mode with light loads. The entire regulator function is implemented with few external components. The LX1912 responds quickly to dynamic load changes using a high bandwidth error amplifier and internal compensation. Tight output voltage regulation is maintained with the compensated 800mV, ±2% reference (line and temp regulation). With two external resistors the output voltage is easily programmed, from 800mV to 90% of VIN. The regulator is capable of providing an output load current of 1.0A, has no minimum load current requirement for stable operation. Current limit is cycle-by-cycle to protect the switch. Power conversion efficiency is maximized with low regulator IQ and PFM mode of operation The LX1912 operational range covers 4.0V to 6.0V, features include power on delay; soft start to limit inrush currents; and thermal shutdown during fault conditions. The 6-pin TSOT package provides a small form factor with excellent power dissipation capability. ƒ Portable Microprocessor Core Volt...