![prd_205_220_microram](http://www.vitecpower.com/wp-content/uploads/2011/01/prd_205_220_microram.jpg)
The MicroRAM output ripple attenuation module combines both active and passive filtering to achieve greater than 40 dB of noise attenuation from 60 Hz to 1 MHz. The MicroRAM operates over a range of 3 to 30 Vdc, is available in either 20 or 30 A models and is compatible with most manufacturers switching converters including Vicor’s VI-200 / VI-J00 and Maxi, Mini and Micro series DC-DC converters.
The MicroRAM’s closed loop architecture greatly improves load transient response and with dual-mode control, provides precise point-of-load voltage regulation. The MicroRAM supports redundant and parallel operation with its integrated ORing diode function.
- 3 – 30 Vdc
- µRAM2(xxx) 20 A
- µRAM3(xxx) 30 A
- Up to 96%
- 2.28″ x 1.45″ x 0.5″(57,9 x 36,8 x 12,7 mm)
- >40 dB ripple attenuation from 60 Hz to 1 MHz
- Integrated ORing diode supports N+1 redundancy
- Significantly improves load transient response
- User selectable performance optimization
- Combined active and passive filtering
- 20 and 30 Ampere ratings
Download Individual Chapters
- High Density DC-DC Converter Technology
- Control Pin Functions and Applications
- Design Requirements
- EMC Considerations
- Current Sharing in Power Arrays
- Thermal Performance Information
Accessory Modules
- Autoranging Rectifier Module (ARM)
- Filter / Autoranging Rectifier Module (FARM)
- Modular AC Front-end System (ENMod)
- High Boost HAM
- Filter Input Attenuator Module (FIAM)
- Output Ripple Attenuator Module (MicroRAM)
Recommended Soldering Methods
Mounting Options
2-D Micro-size Drawings | ||||
Drwg. Number | Description | Download | RoHS | |
25004 | Outline drawing for Micro DC-DC Converter | DXF | PDF | ![]() |
|
3-D Micro-size Module (referring to drawing number 25004) | ||||
Micro, short tin / lead pin, slotted baseplate | STEP | 3D PDF | |||
Micro, short tin / lead pin, threaded baseplate | STEP | 3D PDF | |||
Micro, short tin / lead pin, through-hole baseplate | STEP | 3D PDF | |||
Micro, long tin / lead pin, slotted baseplate | STEP | 3D PDF | |||
Micro, long tin / lead pin, threaded baseplate | STEP | 3D PDF | |||
Micro, long tin / lead pin, through-hole baseplate | STEP | 3D PDF | |||
Micro, short ModuMate, slotted baseplate | STEP | 3D PDF | |||
Micro, short ModuMate, threaded baseplate | STEP | 3D PDF | |||
Micro, short ModuMate, through-hole baseplate | STEP | 3D PDF | |||
Micro, long ModuMate, slotted baseplate | STEP | 3D PDF | |||
Micro, long ModuMate, threaded baseplate | STEP | 3D PDF | |||
Micro, long ModuMate, through-hole baseplate | STEP | 3D PDF | |||
Micro, short gold pin (RoHS), slotted baseplate | STEP | 3D PDF | ![]() |
||
Micro, short gold pin (RoHS), threaded baseplate | STEP | 3D PDF | ![]() |
||
Micro, short gold pin (RoHS), through-hole baseplate | STEP | 3D PDF | ![]() |
||
Micro, long gold pin (RoHS), slotted baseplate | STEP | 3D PDF | ![]() |
||
Micro, long gold pin (RoHS), threaded baseplate | STEP | 3D PDF | ![]() |
||
Micro, long gold pin (RoHS), through-hole baseplate | STEP | 3D PDF | ![]() |
These calculator programs allow users to determine values that help with accessory component selection for power system design.
Thermal Calculators
- Thermal impedance calculator
- Thermal data and heat sink selection tool
This is a downloadable Excel file.
![]() |
SurfMates – Surface-mount Sockets | All SurfMates are RoHS Compatible | ||||||
Board Thickness | Mounting | Assembly Drawing | Converter Pin Style* | Module Style | Input P/N** |
Output P/N** | 5 In/Out Sets P/N | Technical Drawing |
All | surface | PDF | DXF | F | Micro | 22103 | 22104 | 16025 | |
Example of SurfMate Application | ||||||||
* F = Short Gold (RoHS), G = Long Gold (RoHS) ** For individual input / output purchases, a 35-piece minimum (and multiples) applies to Maxis / Minis and a 40-piece minimum (and multiples) for Micros. |
![]() |
InMates – Through-hole | All InMates are RoHS Compatible | |||||||||||
All sockets are supplied on InMate headers to assure proper alignment during installation. | |||||||||||||
Board Thickness (nominal) | Board Thickness (min / max) |
Mounting | Converter Pin Style* | Module Style | Input P/N** | Output P/N** | 5 In/Out Sets P/N | Technical Drawing | |||||
0.063″ | 0.055″ / 0.071″ | inboard | F | Micro | 18376 | 18386 | 18370 | PDF | DXF | |||||
0.063″ | 0.055″ / 0.071″ | onboard | G | Micro | 18380 | 18392 | 18372 | PDF | DXF | |||||
0.094″ | 0.084″ / 0.104″ | inboard | F | Micro | 18377 | 18387 | 18371 | ||||||
0.094″ | 0.084″ / 0.104″ | onboard | G | Micro | 18381 | 18393 | 18373 | ||||||
0.125″ | 0.1125″ / 0.1375″ | onboard | G | Micro | 21540 | 21545 | 21512 | ||||||
Example of Inboard Mounting Options Example of Onboard Mounting Options | |||||||||||||
* F = Short Gold (RoHS), G = Long Gold (RoHS) ** For individual input / output purchases, a 35-piece minimum (and multiples) applies to Maxis / Minis and a 40-piece minimum (and multiples) for Micros. |
|||||||||||||
![]() |
|||||||||||||
Module Exchange Tools | |||||||||||||
Click img. to enlarge |
Description | Module Style | P/N | Technical Drawing | |||||||||
![]() |
Used to facilitate the proper extraction of Micro modules from InMate or SurfMate sockets. | Micro | 22829 | – |
Heat Sinks used with Vicor’s Micro-Size Modules | |||||||||||
Description | P/N | RoHS | Technical Drawing | ||||||||
![]() |
0.40″ longitudinal fins, threaded mounting* | 32174 | ![]() |
PDF | DXF | |||||||
0.90″ longitudinal fins, threaded mounting* | 30190 | ![]() |
PDF | DXF | ||||||||
![]() |
|||||||||||
![]() |
0.40″ longitudinal fins, thru-hole mounting | 30719 | ![]() |
PDF | DXF | |||||||
0.90″ longitudinal fins, thru-hole mounting | 30183 | ![]() |
PDF | DXF | ||||||||
![]() |
|||||||||||
![]() |
0.40″ transverse fins, threaded mounting* | 32173 | ![]() |
PDF | DXF | |||||||
0.90″ transverse fins, threaded mounting* | 30270 |
|
PDF | DXF | ||||||||
![]() |
|||||||||||
![]() |
0.40″ transverse fins, thru-hole mounting | 30722 |
|
PDF | DXF | |||||||
0.90″ transverse fins, thru-hole mounting | 30725 |
|
PDF | DXF | ||||||||
* NOT for use with threaded baseplates | |||||||||||
Heat Sink Thermal Data and Calculator | |||||||||||
![]() |
|||||||||||
Low-Profile Side-Fin Heat Sinks (Height only 0.125″ above module baseplate) | |||||||||||
Description | P/N | RoHS | Technical Drawing | ||||||||
![]() |
0.55″ Side-Fin Heat Sink for Micro-Sized Modules | 30095 | ![]() |
||||||||
Heat Sink Thermal Data and Calculator » | |||||||||||
![]() |
|||||||||||
ThermMate Thermal Pads (10 pieces per package) | |||||||||||
Description | P/N | Thickness | RoHS | Technical Drawing | |||||||
![]() |
|||||||||||
For use with Vicor Micro-size modules | 20265 | 0.007″ | ![]() |
PDF | DXF | |||||||
* NOT for use with VI-200 or VI-J00 modules |