LM3481QMMX/NOPB

The LM3481 device is a versatile Low-Side N-FET
high-performance controller for switching regulators.
The device is designed for use in boost, SEPIC
and flyback converters and topologies requiring a lowside FET as the primary switch. The LM3481 device
can be operated at very high switching frequencies
to reduce the overall solution size. The switching
frequency of the LM3481 device can be adjusted to
any value between 100 kHz and 1 MHz by using
a single external resistor or by synchronizing it to
an external clock. Current mode control provides
superior bandwidth and transient response in addition
to cycle-by-cycle current limiting. Current limit can be
programmed with a single external resistor.
The LM3481 device has built-in protection features
such as thermal shutdown, short-circuit protection and
overvoltage protection. Power-saving shutdown mode
reduces the total supply current to 5 µA and allows
power supply sequencing. Internal soft start limits the
inrush current at start-up. Integrated current slope
compensation simplifies the design and, if needed for
specific applications, can be increased using a single
resistor.