The LTM®4619 is a complete dual 4A or single 8A stepdown DC/DC μModule® (micromodule) regulator. Included
in the package are the switching controller, power FETs,
inductor, and all support components. Operating over
input voltage ranges of 4.5V to 26.5V, the LTM4619 supports two outputs with voltage ranges of 0.8V to 5V, each
set by a single external resistor. Its high efficiency design
delivers 4A continuous current (5A peak) for each output.
High switching frequency and a current mode architecture
enable a very fast transient response to line and load
changes without sacrificing stability. The two outputs
are interleaved with 180° phase to minimize the ripple
noise and reduce the I/O capacitors. The device supports
frequency synchronization and output voltage tracking for
supply rail sequencing. Burst Mode operation or pulseskipping mode can be selected for light load operations.
Fault protection features include overvoltage protection,
overcurrent protection and foldback current limit for
short-circuit protection.
The low profile package (2.82mm) enables utilization of
unused space on the bottom of PC boards for high density
point of load regulation. The power module is offered in
a 15mm × 15mm × 2.82mm LGA package. The LTM4619
is RoHS compliant with Pb-free finish.
