4630The LTM4630 DC/DC step-down regulator comes in a 16mm x 16mm x 4.41mm LGA package, which consists of inductors and mosfets.
According to the supplier, the efficiency for 36A at 1VOUT, from 12VIN is 86% and from 5VIN, is 88%.
“With no need to have for an external heat sink, the LTM4630 delivers 36A as much as 60°C ambient with no airflow, 65°C with 200LFM and 69°C with 400LFM. An external heat sink increases the maximum operating ambient temperature by around 10°C,” mentioned Linear.
Aimed at ATCA, μTCA mezzanine boards, the LTM4630 is made to convert 12VIN to higher power (as much as 144A) point-of-load voltages down to 0.6V. The input voltage variety is 4.5V to 15V (16V max) with output ranging from 0.6V to 1.8V.
There’s an internal remote sense amplifier to give +/-1.5% correct output regulation more than temperature, line and load, by sensing the voltage in the load and thus compensating for voltage droop caused by printed circuit board trace impedance.
An additional function is speedy short-circuit protection exactly where a existing foldback strategy reduces IOUT to a minimum, stopping the μModule regulator from overheating and protecting the load as well as upstream power supply.