The LM5574 is an easy-to-use, buck regulator that
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 LM5574 delivers 0.5A of
continuous output current with an integrated 750mΩ
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 LM5574 makes sure of robustness with
cycle-by-cycle current limit, short-circuit
protection, thermal shutdown, and remote shutdown.
The device is available in a 16-pin TSSOP package.
The LM5574 is supported by the full suite of
WEBENCH online design tools.
The LM5574 is an easy-to-use, buck regulator that
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 LM5574 delivers 0.5A of
continuous output current with an integrated 750mΩ
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 LM5574 makes sure of robustness with
cycle-by-cycle current limit, short-circuit
protection, thermal shutdown, and remote shutdown.
The device is available in a 16-pin TSSOP package.
The LM5574 is supported by the full suite of
WEBENCH online design tools.