SC4611

Wide Input Range High Performance Synchronous Buck Switching Regulator POWER MANAGEMENT Description SC4611 is a high performance synchronous buck controller that can be configured for a wide range of applications. The SC4611 utilizes synchronous rectified buck topologies where high efficiency is the primary consideration. It is optimized for applications involving multiple and redundant convertors connected together. The star tup is asynchronous, which keeps the lower side FET off during soft start. This is a desired feature when a convertor is turned on with a preset external voltage or pre-bias voltage www.DataSheet4U.com already present across its output. With the lower FET off, external bus is not discharged which avoids latch-up of modern ASIC circuits. Vcc supply, soft start, power-good signaling, high current gate drivers, bootstrapped supply for driving high side Nchannel MOSFETs, shoot through protection, frequency synchronization and the option for overvoltage crowbar. It also features multi mode overload protection that includes continuous current limiting, hiccup mode followed by latch off. The user has the option of bypassing the hiccup mode and latch off the output if required. SC4611 Features ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ Wide input range, 4.5 to 30V Output voltage as low as 0.5V 2A output drive capability Asynchronous start up mode Multimode overcurrent protection with current limit, hiccup mode and latched shutdown Overvoltage crowbar protection Power OK signal Programma...