器件名称:
LM5574_09
功能描述:
SIMPLE SWITCHER 75V, 0.5A Step-Down Switching Regulator
文件大小:
446.27KB 共22页
简 介:
LM5574/LM5574Q SIMPLE SWITCHER 75V, 0.5A Step-Down Switching Regulator March 23, 2009 LM5574/LM5574Q SIMPLE SWITCHER 75V, 0.5A Step-Down Switching Regulator General Description The LM5574 is an easy to use SIMPLE SWITCHER buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 - 75V, the LM5574 delivers 0.5A of continuous output current with an integrated 750m N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of lowduty cycles associated with current mode regulators. The operating frequency is adjustable from 50kHz to 500kHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM5574 guarantees robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a TSSOP-16 package. The LM5574 is supported by the full suite of WEBENCH On-Line design tools. Features ■ LM5574Q is an Automotive Grade product that is AEC■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Q100 grade 1 qualified (40°C to + 125°C operating junction temperature) Integrated 75V, 750m N-channel MOSFET Ultra-wide input voltage range from 6V to 75……
