µModule regulator scalable to 180A

Linear Technology introduces the LTM4647, a 30A step-down µModule regulator. The LTM4647 includes the inductor, MOSFET, DC/DC controller and supporting components in a 9 x 15 x 5.01mm BGA package.

The device’s conversion efficiency from 12VIN to 1VOUT at 30A is 87% when delivering 30A continuously without a heat sink or air flow. The LTM4647 can deliver up to 180A by current sharing six devices in parallel.

Total output voltage DC accuracy is guaranteed at ±1.2% over reference, feedback resistor, line, load and temperatures ranging from –40 to 125°C. The on board remote sense amplifier compensates for the voltage drop caused by trace impedance of the PC board due to large load currents.

With its small package size and precise voltage accuracy, the LTM4647 is said to be suitable for devices such as FPGAs, ASICs, MCUs and GPUs.

Applications include PCIe boards, communication infrastructure, cloud computing-based systems, test and measurement, medical and industrial equipment.

Input voltage range is 4.7 to 15V and the output voltage can be set by an external single resistor ranging from 0.6 to 1.8V. Output voltage tracking and soft-start features allow users to set sequencing with other system rails.

The switching frequency can be set by an external single resistor ranging from 400 to 700kHz or can be synchronised to an external clock. Fault protection features include overvoltage protection, overcurrent protection, and temperature monitoring.

Peggy Lee