MIL-COTS MI-RAM™
Ripple Attenuator Module

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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 mVp-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.

Specifications
Input Voltages   5 – 50 VDC
Output Current   10 or 20 A
Efficiency   93 – 99%
Dimensions   2.28 x 2.40 x 0.50 in
57.9 x 61.0 x 12.7 mm
   

 

 

PDF Icon Data Sheet »

Find

Compatible Converters

The MIL-COTS MI-RAM – Ripple Attenuator Module – works in conjunction with a specific set of Vicor converters to deliver optimal efficiency, power and protection.
 
To easily view the appropriate converter components needed for the desired MIL-COTS MI-RAM, please use the PowerBench Solution Selector tool to locate compatible offerings.

Features & Benefits
  • Reduces output PARD to <10mV pp
  • Full attenuation up to 20 A load
  • Compatible with all MI-series units from 5-50 vdc output
Diagram
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RAM with optional trimming circuit and recommended common–mode choke.

 

Click image to enlarge.

 

Documentation

 

Application Notes

PDFRAM Application Note »

PDFEMI Considerations for the RAM Module » (See page 28)

PDFSoldering Methods and Procedures for Vicor Power Modules »

 

Design Guide / Applications Manual

Download Entire Manual
 

PDFVI-200, VI-J00 Design Guide and Applications Manual »


Download Individual Chapters 

PDF 1. Zero-Current Switching »

PDF 2. DC-DC Converter Pinouts »

PDF 3. Module Dos and Donts »

PDF 4. Overcurrent Protection »

PDF 5. Output Voltage Trimming »

PDF 6. Multiple Gate In Connections »

PDF 7. Applications Circuits / Converter Array Design Considerations »

PDF 8. Using Boosters and Parallel Arrays »

PDF 9. EMC Considerations »

PDF 10. Optional Output Filters »

PDF 11. Battery Charger (BatMod) »

 


Filter and Front-End Module Chapters

PDF 12. AC Input Module (AIM / MI-AIM) »

PDF 13. Harmonic Attenuator Module (HAM) »

PDF 14. Input Attenuator Module (IAM / MI-IAM) »

PDF 15. Ripple Attenuator Module (RAM / MI-RAM) »

PDF 16. Offline Front End »

 


Power System Chapters

PDF 17. DC Input Power System (ComPAC / MI-ComPAC Family) »

PDF 18. AC Input Power System (FlatPAC Family) »

PDF 19. AC Input Power System (PFC FlatPAC) »

 


General Chapters

PDF 20. Thermal and Module Mounting Considerations »

PDF 21. Thermal Curves »

PDF 22. Lead Free Pins (RoHS) »

 

PDF 23. Tin Lead Pins »

PDF 24. Module Packaging Options (SlimMod, FinMod, BusMod and MegaMod Families) »

PDF 25. Product Weights »

PDF 26. Glossary of Technical Terms »

 

Packaging Options

Drawing       Description
Number

03550           PDFOutline Drawing for MI-RAM Module »

03550           DXFOutline Drawing for MI-RAM Module »
 

Related Products

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DC-DC Defense & Aerospace    

 

 

Converters    
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MI-200 and MI-J00 DC-DC Converters   Go  
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Filters    
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MIL-COTS MicroRAM Output Ripple Attenuation Module   Go  

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Accessories

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BusMods

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Terminal blocks listed in the table below are for use with Vicor VI-J00 size modules.
These terminal blocks are NOT for use with Vicor Mini-size modules.
Terminal
Blocks
  Part
Number
  Module
Style
                      Technical Drawing    
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Rugged chassis-mount housing   18952   VI-J00   Add-B1 suffix to module number for preinstalled   PDF   Add to Cart  
        DXF  

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EMI Shielding

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VI-J00-Size Shield   Part
Number
  Module
Style
           
 
   
 
   
 
  Technical Drawing    
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With Pem Nuts   32184   VI-J00                       PDF   Add to Cart  
                      DXF  

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Sockets

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Electro-tin Finish   Part
Number
  Vendor
Part Number
                      Technical Drawing    
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0.040"   30074   09-9002-1-04                       PDF   Add to Cart  
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0.080"   30075   09-9044-1-04                       PDF   Add to Cart  

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Standoffs

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Long Female
0.25" Hex
  Part
Number
                          Technical Drawing    
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(6) 0.25" x 0.525"   32183-01                           PDF   Add to Cart  
                        DXF  

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Thermal Management

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Heat Sinks listed in the table below are for use with Vicor VI-J00-size modules.
These heat sinks are NOT for use with Vicor Mini-size modules.
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TOOLHeat Sink Thermal Data and Calculator »
 

Heat Sinks
Longitudinal Fins

  Part
Number
  Module
Style
                      Technical Drawing    
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0.90"   30191   VI-J00                       PDF   Add to Cart  
                      DXF  
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Heat Sinks listed in the table below are for use with Vicor VI-J00-size modules.
These heat sinks are NOT for use with Vicor Mini-size modules.
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TOOLHeat Sink Thermal Data and Calculator »
 
Heat Sinks
Transverse Fins
  Part
Number
  Module
Style
                      Technical Drawing    
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0.90"   30771   VI-J00                       PDF   Add to Cart  
                      DXF  
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0.40"   30140   VI-J00                       PDF   Add to Cart  
                      DXF  

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Thermal Pads listed in the table below are for use with Vicor VI-J00-size modules.
These Thermal Pads are NOT for use with Vicor Mini-size modules.
ThermMate
Thermal Pads
  Part
Number
  Module
Style
                      Technical Drawing    
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(10) 0.007" Pads   20267   VI-J00                       PDF   Add to Cart  
                      DXF  

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Grounding Clips   Part
Number
                          Technical Drawing    
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For use with
FinMod Longitudinal
0.25" Fins (-F1)
  32185                           PDF   Add to Cart  
                      DXF  
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For use with
FinMod Longitudinal
0.50" Fins (-F2)
  32185                           PDF   Add to Cart  
                      DXF  
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For use with
FinMod Transverse
0.25" Fins (-F3)
  32186                           PDF   Add to Cart  
                      DXF  
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For use with
FinMod Transverse
0.50" Fins (-F4)
  32186                           PDF   Add to Cart  
                      DXF  
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For use with
SlimMod Flangless Package (-S)
  32187                           PDF   Add to Cart  
                      DXF  

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