PRM Features: 16 – 50 Vdc input range 1.3 MHz switching frequency 95% efficiency ZVS buck-boost regulaton
VTM Features: Isolated 1 – 50 Vdc output 1 µs transient response 3 MHz switching frequency Up to 96.5% efficiency
Power Density:	414 W/in3
Operation:	–55°C to 125°C operation
Dimensions per module:	1.1 in2 (7.1 cm2)

Voltage Transformation Modules (VTMs) put isolated current multiplication and voltage division directly at the point of load (POL), and an upstream Pre-Regulator Module (PRM) controls the factorized bus voltage supplied to the VTM to provide line and load regulation. Together, the PRM and VTM chip set provides the full functionality of a DC-DC converter, but with breakthrough performance and flexibility in a rugged, miniature package.

The MIL-COTS PRM operates from a wide input range of 16 – 50 Vdc, meeting many of the ground vehicle and airborne requirements of MIL-STD-1275 and MIL-STD-704. Rated for 120 W, the 28 V PRM produces a nominal factorized bus voltage of 36 Vdc, controllable over the range of 26 – 50 Vdc. The downstream isolated VTM is available with twelve voltage division ratios from 1:1 to 1:32 and provides the user with flexibility to supply up to 100 A or 120 W at any output voltage from 1 to 50 Vdc in a surface-mount package occupying only 1 square inch.

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