MI-RAM – MIL-COTS Ripple Attenuator Module

Military COTS MI-RAM – Ripple Attenuator Module

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MI-RAM Data Sheet »

MIL-STD-810 Environments »

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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

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.

Vicor's experienced Application Engineers are here to help.

Contact Customer Service:

For help with product selection and availability, placing an order and order status:

800-735-6200

Email: custserv@vicorpower.com

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International Support Contacts

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Applications Engineering Support »

RAM Application Note »
EMI Considerations for the RAM Module » (see page 28)
Soldering Methods and Procedures for Vicor Power Modules »

MI-RAM Data Sheet »

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

Thermal Calculator
Thermal data and heat sink selection tool »
This is a downloadable Excel file.

Download Entire Manual

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

Download Individual Chapters

Zero-Current Switching »
DC-DC Converter Pinouts »
Module Dos and Donts »
Overcurrent Protection »
Output Voltage Trimming »
Multiple Gate In Connections »
Applications Circuits / Converter Array Design Considerations »
Using Boosters and Parallel Arrays »
EMC Considerations »
Optional Output Filters »
Battery Charger (BatMod) »

Filter and Front-End Module Chapters

Power System Chapters

General Chapters

Drawing Number		Description				RoHS		Technical Drawing
03550		Outline Drawing for MI-RAM Module						PDF \| DXF

Terminal block for VI-J00-size modules

Click img. to enlarge	Description	P/N	Technical Drawing
	Rugged chassis-mount housing for VI-J00-size module (add-B1 suffix to module number for preinstalled)	18952	PDF \| DXF

Click img. to enlarge	Description	P/N	RoHS	Technical Drawing
	VI-J00-size Shield without Pem Nuts	32184		PDF

Sockets
Click img. to enlarge	Description	Pin Size	P/N	Technical Drawing
	Electro-tin finish	0.040"	30074	PDF \| DXF
	Electro-tin finish	0.080"	30075	PDF \| DXF


Standoffs
Click img. to enlarge	Description		P/N	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)

Click img. to enlarge	Description		P/N	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)

Click img. to enlarge	Description	Thickness	P/N	Technical Drawing
	For use with Vicor VI-J00 moduels only (not Mini modules)	0.007"	20264	PDF


Grounding Clips

Click img. to enlarge	Description		P/N	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