Linear Technology Offers DC/DC uModule Regulator

Linear Technology has introduced the LTM4627, a 15A DC/DC uModule regulator with on-board inductors, MOSFETs and supporting components for telecom servers, networking and industrial equipment. The LTM4627 is offered in a 2.6g, 15 x 15mm land grid array (LGA) package. Lower gate capacitance MOSFETs and stronger MOSFET drivers enable the LTM4627 to operate at approximately seven per cent higher efficiency or to deliver up to 15A load current in the same board area and junction temperature as the 10A DC/DC uModule regulator.

Conditions for this comparison: 12Vin, 1.2Vout, 10A compared to the LTM4600 10A uModule regulator. The LTM4600 is offered in 15 x 15 x 2.82mm and LTM4627 in 15 x 15 x 4.32mm LGA. The LTM4627 can convert input supplies ranging from 4.5V to 20V to output voltages from 0.6V to 5V, regulating the output with only +/-1.5 per cent total DC output error maximum. Multiple LTM4627 devices can be paralleled for current sharing up to 60A. Applications include medical imaging systems and avionics equipment. The LTM4627 has an on-board differential remote sense amplifier to precisely regulate low-voltage, high-current loads such as 1.0V or sub-1V core voltages of FPGAs and ASICs.

Remote sensing corrects voltage errors caused by the impedance of PCB traces when large current flows to the load. Output voltage tracking and soft-start features allow controlled power-up and power-down of a complex board with multiple power rails. The device's phase-locked loop (PLL) function permits users to synchronise the LTM4627 to a clock frequency from 250kHz to 780kHz, avoiding a specific frequency or frequency range that may interfere with sensitive components. The LTM4627 is guaranteed for operation from -40C to +125C.

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