Regulator for Sub-28nm FPGAs Is Scalable up to 144A

Linear Technology Corporationintroduces the LTM4630-1, a dual 18A or single 36A µModule® (micromodule) regulator with high precision output voltage regulation for 28nm and sub-28nm FPGAs, ASICs and microprocessors. The core voltage of these advanced digital devices requires very accurate voltage regulation at steady state (dc) and at fast load current transients. The LTM4630-1 provides precision output voltage regulation for both conditions: (a) ±0.8% maximum total dc error over line, load and temperature (-40 to 125 degrees C) and (b) ±3% total error, including transients, with minimum output capacitance. To power mid to high power 28nm and sub-28nm digital devices, the LTM4630-1 can be used in parallel to current share up to 144A (i.e., 4 devices x 36A). The LTM4630-1 includes a dc-dc regulator, inductors and MOSFETs in a 16mm x 16mm x 5.01mm BGA package.

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The LTM4630-1 regulates an output voltage ranging from 0.6V to 1.8V and from an input voltage range of 4.5V to 15V. The user can optimize transient response of the LTM4630-1 while reducing output capacitance with an external resistor and capacitor by manipulating the loop response of the µModule regulator. With minimum output ceramic capacitors (five 220µF), the LTM4630-1’s ±3% output voltage regulation window is measured with a 25% load step transient response from 12Vin, while delivering 36A to a 1.2V load.