Micro-module regulators can serve latest FPGAs with up to 144A

May 29, 2015 // By Graham Prophet
LTM4630-1 is a dual 18A or single 36A µModule (micromodule) regulator with high precision DC and transient output regulation, that is scalable up to currents of 144A, 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: ±0.8% maximum total DC error over line, load and temperature (-40°C to 125°C); and ±3% total error, including transients, with minimum output capacitance. To power mid to high power 28-nm and sub-28-nm 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 16 x 16 x 5.01 mm BGA package.

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 optimise 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 220 µF), 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. The efficiencies at 12VIN, 1.2VOUT with 20A and 36A load currents are 87.5% and 86%, respectively. Corresponding power loss values are 3.2W and 6.5W, respectively. The LTM4630-1 delivers full 36A current up to 60°C ambient, from 12VIN to 1VOUT with no air flow. Load current derates at approximately 5A per 10°C rise in ambient temperature beyond 60°C.

The LTM4630-1 is offered in two VOUT DC precision grades of ±0.8% and ±1.5%. Pricing starts at $37.15 each and $36.05 each, respectively (1000).

Linear Technology; www.linear.com/product/LTM4630-1