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Module regulator powers FPGAs, GPUs, ASICs and system power

The Power by Linear PoL regulator integrates inductors, MOSFETs, a DC/DC controller and supporting components in a 11.25 x 15 x 5.01mm BGA package.


The dual regulator design, small package size, and precise voltage regulation are suitable to power low voltage and high current devices such as FPGAs, ASICs, microprocessors and GPUs, says the company. Applications include PCIe boards, communication infrastructure, cloud computing-based systems, as well as medical, industrial, and test and measurement equipment.


Total output voltage DC accuracy is guaranteed at ±1.5% over line, load and

temperature (-40 to 125°C). The onboard remote sense amplifiers on both outputs compensate for voltage drop caused by trace impedance of the PC board due to large load currents. The selectable internal or external feedback loop compensation, enables users to optimise loop stability and transient performance while minimising the number of output capacitors.


Peak efficiency at 12VIN to 1.0VOUT is 86%. With 200LFM air flow, the regulator delivers 20A continuously up to 85°C ambient. The current mode architecture allows multi-phase parallel operation to increase output current with good current sharing.

The LTM4646 operates from an input range of 4.5 to 20V. When 5V external bias is available, the device can operate from 2.375V. The output voltages are adjustable from 0.6 to 5.5V, enabling the device to generate not only low voltage for digital devices but also 2.5, 3.3 and 5.0V, which are commonly needed in system bus

Voltages, adds Analog Devices. The switching frequency can be programmed from 250kHz to 1.3MHz with one resistor, and can also be synchronised to an external clock ranging from 300kHz to 1MHz for noise-sensitive applications.


Over-voltage and over-current protection are included.  

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