Single 36-A, dual 18-A regulator features 86% efficiency

The LTM4630 is a dual 18-A per output or single 36-A output dc/dc µModule step-down regulator capable of delivering up to 144 A when four devices are current shared. The LTM4630 is a dc/dc regulator system in a 16 x 16 x 4.41-mm LGA package, which includes inductors, MOSFETs, dc/dc controller and compensation circuitry.

The efficiency of the regulator for 36-A at 1 VOUT, from 12 VIN is 86% and 88% from 5 Vin. The device does not need an external heat sink and delivers 36 A at up to 60°C ambient with no airflow. At an ambient temperature of 65°C it requires 200 lfm and 69°C it needs 400 lfm airflow. Typical of applications include mezzanine boards such as ATCA, µTCA, PoL regulation for new processors, ASICs, and the recently introduced