Linear Technology Corporation introduces the LTM46301, a dual 18A or single 36A µModule (micromodule) regulator with high precision output voltage regulation for 28nm and sub28nm 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 LTM46301 provides precision output voltage regulation for both conditions: (a) ±0.8% maximum total DC error over line, load and temperature (40°C to 125°C) and (b) ±3% total error, including transients, with minimum output capacitance. To power mid to high power 28nm and sub28nm digital devices, the LTM46301 can be used in parallel to current share up to 144A (i.e., 4 devices x 36A). The LTM46301 includes a DC/DC regulator, inductors and MOSFETs in a 16mm x 16mm x 5.01mm BGA package.
The LTM46301 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 LTM46301 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 LTM46301’s impressive ±3% output voltage regulation window is measured with a 25% load step transient response from 12V , while delivering 36A to a 1.2V load. The efficiencies at 12V , 1.2V with 20A and 36A load currents are 87.5% and 86%, respectively. Corresponding power loss values are 3.2W and 6.5W, respectively. The LTM46301 delivers full 36A current up to 60°C ambient, from 12V to 1V with no air flow. Load current derates at approximately 5A per 10°C rise in ambient temperature beyond 60°C.
The LTM46301 is offered in two V DC precision grades of ±0.8% and ±1.5%. 1000piece pricing starts at $37.15 each and $36.05 each, respectively.
Summary of Features:
- LTM46301 ±0.8% Maximum Total DC Error Over Line, Load & Temperature (40°C to 125°C)
- ±3%Transient Error with Minimum
- Output Capacitance
- Optional External Loop Compensation
- Current Sharing up to 144A
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