Description

The MI-RAM is designed for applications where extremely low noise outputs are required. When used with any Vicor MI-series DC-DC converter, the MI-RAM reduces both line frequency related ripple and switching noise to less than 10 mV p-p, DC to 20 MHz. The combination of the MI-RAM with an MI-series converter provides the output noise performance of a linear supply at a power density in excess of 15 W/in3.

All of the features of the MI-series converter remain available while using the MI-RAM including output voltage trimming, OVP and OTP (MI-200 only), current limiting, remote sense, and logic enable / disable.

Fully encapsulated in a low profile package enables the MI-RAM to meet MIL-STD-810 environmental testing requirements.

Input Voltage:
  • 5 – 50 Vdc
Output Current:
  • MI-RAM(x)1: 10 A
  • MI-RAM(x): 20 A
Efficiency:
  • 93 – 99%
Operation:
  • -55 – 100°C M-Grade
Dimensions(half brick):
  • 2.28″ x 2.4″ x 0.5″(57,9 x 61,0 x 12,7 mm)

  • Reduces output PARD to <10 mV pp
  • Full attenuation up to 20 A load
  • Compatible with all MI-series units from 5 –50 Vdc output
  • No adjustments required
  • Converter sense, trim, OV and OC retained
  • MIL-STD-810 environments

Design Calculators

These calculator programs allow users to determine values that help with accessory component selection for power system design.

 

Thermal Calculator

Terminal block for VI-J00-size modules
Description P/N RoHS Technical Drawing
Rugged chassis-mount housing for VI-J00-size module
(add-B1 suffix to module number for preinstalled)		 18952 PDF | DXF

Description P/N RoHS Technical Drawing
VI-J00-size Shield with Pem Nuts 32184 PDF | DXF

Sockets
Description Pin Size P/N RoHS Technical Drawing
Electro-tin finish 0.040″ 30074 PDF
Electro-tin finish 0.080″ 30075 PDF
Standoffs
Description P/N RoHS Technical Drawing
Six 0.25″ x 0.525 Long Female, 0.25″ Hex 32183-01 PDF | DXF

Heat sinks used with Vicor’s VI-J00-size module (not Mini modules)
Description P/N RoHS Technical Drawing
0.90″ Longitudinal Fins 30191 PDF | DXF
0.90″ Transverse Fins 30771 PDF | DXF
0.40″ Transverse Fins 30140 PDF | DXF
Heat Sink Thermal Data and Calculator
ThermMate Thermal Pads (10 pieces per package)
Description Thickness P/N RoHS Technical Drawing
For use with Vicor VI-J00 moduels only
(not Mini modules)		 0.007″ 20267 PDF | DXF
Grounding Clips
Description P/N RoHS Technical Drawing
For use with FinMod, Longitudinal 0.25″ Fins (-F1) 32185 PDF | DXF
For use with FinMod, Longitudinal 0.50″ Fins (-F2) 32185 PDF | DXF
For use with FinMod, Transverse 0.25″ Fins (-F3) 32186 PDF | DXF
For use with FinMod, Transverse 0.50″ Fins (-F4) 32186 PDF | DXF
For use with SlimMod Flangless package (-S) 32187 PDF | DXF