SCV1423

NCP1423, SCV1423 Boost Converter - Sync-Rect, PFM, DC-DC, True-Cutoff, Ring-Killer 400 mA NCP1423 is a monolithic micropower high frequency step−up switching converter IC specially designed for battery operated hand−held electronic products. It integrates Synchronous Rectifier for improving efficiency as well as eliminating the external Schottky Diode. High switching frequency (up to 600 kHz) allows low profile inductor and output capacitor being used. When the IC is disabled, internal conduction path from LX or BAT to OUT is blocked, OUT pin is isolated from the battery. This achieves True−Cutoff. Ring−Killer is also integrated to eliminate the high frequency ringing in discontinuous conduction mode. Low−Battery Detector, Cycle−by−Cycle Current Limit, Overvoltage Protection and Thermal Shutdown provide value−added features for various battery operated application. With all of these functions ON, the quiescent supply current is only 9.0 mA. This device is available in compact Micro10 package. Features High Efficiency: 92% for 3.3 V Output@ 400 mA from 2.5 V Input 87% for 1.8 V Output@ 70 mA from 1.2 V Input High Switching Frequency, up to 600 kHz (not hitting current limit) Low Quiescent Current of 9.0 mA Low Battery Detector 0.8 V Startup External Adjustable Output Voltage ±1.5% Output Voltage Accuracy Ring−Killer for Discontinuous Conduction Mode Thermal Shutdown 1.2 A Cycle−by−Cycle Current Limit Output Current up to 400 mA @ VOUT = 3.3 V, 200 mA @ VO...