LTM4604/LTM4604A pdf datasheet

The LTM®4604A is a complete 4A switch mode DC/DC
power supply with ±1.75% total output voltage error.
Included in the package are the switching controller, power
FETs, inductor and all support components. Operating over
an input voltage range of 2.375V to 5.5V, the LTM4604A
supports an output voltage range of 0.8V to 5V, set by a
single resistor. This high effi ciency design delivers up to
4A continuous current (5A peak). Only bulk output capacitors
are needed to complete the design.
The 0.630mm LGA pads with 1.27mm pitch simplify
PCB layout by providing standard trace routing and via
placement. (The LTM4604A has smaller pads than the
LTM4604.) The low profi le package (2.3mm) enables
utilization of unused space on the bottom of PC boards
for high density point of load regulation. High switching
frequency and a current mode architecture enable a very
fast transient response to line and load changes without
sacrifi cing stability.
Fault protection features include foldback current protection,
thermal shutdown and a programmable soft-start
function. The LTM4604A is offered in a small thermally
enhanced 15mm × 9mm × 2.3mm LGA package and is
Pb free and RoHS compliant.