Enpirion DC-DC modules use LDMOS to raise volts and efficiency, shrink size
Margery Conner - May 21, 2012
Enpirion, one of the major players in the power module business, has introduced its new EN2300 12V DC-DC converter family. The devices support an input voltage range of 4.5 to 14V and an output voltage range of 0.6 to 5V.
While much of the excitement in the power conversion world centers on the more exotic wide bandgap materials of GaN (gallium nitride) and SiC (silicon carbide), which tout high switching frequencies and low conduction losses, Enpirion achieves what it claims is the industry's highest figure of merit (FOM = Gate Charge x On-state Resistance in units of milli-ohm nano-coulombs) of 20, which is claims is a 40% improvement over alternative LDMOS, 73% over VDMOS, and 33% better than high performance GaN.
The new process is 0.18u lateral DMOS (LDMOS). (Texas Instruments also uses a lateral DMOS process in its lower-voltage modules.)
Look for Enpirion's modules to continue to increase in their voltage range - LDMOS still has plenty of room to increase its blocking voltage, although it can't touch the 600V+ blocking voltages of SiC.
Enpirion refers to its modules as power system-on-chip (PwrSOC). It integrates the controller, power MOSFETs, high frequency input capacitors, compensation network, and inductor all in one IC-like package, controlling package layout and parasitics and removing those headaches from the system designer. The EN2300 family devices switch at 2MHz.
The EN2300 devices footprints are from 4A at 190mm2 to 15A at 308mm2. All the EN2300 devices achieve up to 95% efficiency with a flattened efficiency profile from 10% to 100% load. The devices are available now, with the EN2340QI at $3.56, EN2360QI at $4.41, EN2390QI at $6.60, EN23F0QI at $9.00 at volumes of 1k units.
Get datasheet here.
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