6V to 75V, 3A Wide Vin Step-Down Regulator

The LM5576 is an easy-to-use, 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 6V to 75V, the

LM5576 delivers 3A of continuous output current with an integrated 170mΩ N-Channel

MOSFET. The regulator uses an emulated current mode architecture which provides

inherent line regulation, tight load transient response, and ease-of-loop

compensation without the usual limitation of low-duty 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 ICs from the LM(2)557x family to self-synchronize or to synchronize

to an external clock. The LM5576 makes sure of robustness with cycle-by-cycle

current limit, short-circuit protection, thermal shutdown, and remote shutdown. The

device is available in a power-enhanced, 20-pin HTSSOP package that features an

exposed die attach pad for thermal dissipation. The LM5576 is supported by the full

suite of WEBENCH circuit design and selection simulation services online design

tools.