The LTM®4645 is a 25A output switching mode step-down
DC/DC μModule® (power module) regulator. Included in
the package are the switching controller, power FETs, inductor and all supporting components. Operating over an
input voltage range of 4.7V to 15V, the LTM4645 supports
an output voltage range of 0.6V to 1.8V, set by a single
external resistor. Only a few input and output capacitors
are needed.
Its high efficiency design delivers about 86% efficiency
from 12V input to 1.0V output with 25A continuous load
current. High switching frequency and a current-mode
architecture enable a very fast transient response to line
and load changes without sacrificing stability. The device
supports frequency synchronization, programmable
multiphase operation, N+1 phase redundancy, and output
voltage tracking for supply rail sequencing.
Fault protection features include overvoltage and overcurrent protection. The power module is offered in a space
saving 9mm × 15mm × 3.51mm BGA package. The
LTM4645 is available with SnPb (BGA) or RoHS compliant terminal finish.
