µModule regulators deliver 300A to GPUs, FPGAs, ASICs & MPUs

The LTM4650-1A guarantees ±0.8% total DC voltage accuracy over reference, line, load and temperature (-40 to +125°C), whereas the LTM4650-1B guarantees ±1.5%. Both devices can be optimised for ±3% or better total error band, including load step transients with a minimum number of ceramic capacitors to meet the core voltage window requirement of sub-28nm digital ICs.

Compared to competing power POL module regulators, the LTM4650-1A requires 60% less capacitance because of three main features (12VIN, 1VOUT, 0A to 25A load step, 25A/µs):

• Guaranteed ±0.8% total DC voltage accuracy allows more margin (less capacitance) for the AC variation due to a load transient response to satisfy a given processor core voltage tolerance window.
• The device can be externally adjusted (compensated) for optimum loop response to deliver load transients with fewer output capacitors. This enables use of important capacitors.
• The device operates with phase interleaving, which reduces input and output current ripple, reducing the requirement for load capacitance.

The LTM4650-1 includes a dual output DC/DC regulator, inductors and MOSFETs in a 16mm x 16mm x 5.01mm BGA package. The LTM4650-1 regulates an output voltage ranging from 0.6V to 1.8V from an input voltage within 4.5V to 15V. Delivering 50A, 92% efficiency is recorded at 5VIN, 1.8VOUT and 86% at 12VIN, 1.0VOUT. The LTM4650-1 delivers the full 50A current up to +70°C ambient, from 12VIN to 1.0VOUT with 200LFM airflow. The LTM4650-1 can be operated in parallel to increase output current, up to six in parallel for 300A of output current. The LTM4650-1 is pin-compatible with the lower current LTM4630-1 (dual 18A or single 36A); so users can choose the correct part depending on load current without changing PCB layout.

The LTM4650-1 is rated for operation from -40 to +125°C. 1,000-piece pricing starts at $46.75 each.