TM MI - RAM Military Ripple Attenuator Modules Features " Reduces output PARD to <10mV pp " 93%-99% efficiency " Full attenuation up to 20A load " Converter sense, trim, OV and OC retained " Compatible with all MI-Series units from 5 to 50Vdc output " MIL-STD-810 environments " Size: 2.28" x 2.4" x 0.5" (57,9 x 61,0 x 12,7mm) " No adjustments required Product Highlights The MI-RAM is designed for military 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 10mV p-p, DC to 20MHz. The combination of the MI-RAM with an MI converter provides the output noise performance of a linear supply at a power density in excess of 15W/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 output inhibit. All units are manufactured in ISO 9001-registered facilities. Full epoxy encapsulation in a low profile package enables the MI-RAM to meet MIL-STD-810 environmental testing requirements. Specifications (At TBP = 25°C, unless otherwise specified) PARAMETER MIN TYP Output noise and ripple MAX UNITS NOTES 2.0 6.0 3.0 mV pp MI-200; 10% to 100% load 10.0 mV pp MI-J00; 10% to 100% load Input voltage range 5Vdc 50 Vdc Output voltage accuracy 99.5 100.5 % Of MI source converter Full load current 10 A MI-RAM-I1 and MI-RAM-M1 20 A MI-RAM-I2 and MI-RAM-M2 DC voltage drop 0.34 0.38 10% to full load Dissipation = (DC voltage drop x load current) + (Vin x 15 mA) Isolation 250 Vrms Input/output to baseplate Weight 3.0 (85) ounces (grams) Product Grade Specifications PARAMETER PRODUCT GRADE Storage temperature Operating temperature (baseplate) Power cycling burn-in Temperature cycled with power off 17°C per minute rate of change I - Grade M- Grade -55°C to +125°C -65°C to +125°C -40°C to +100°C -55°C to +100°C 12 hours, 25 cycles 96 hours, 200 cycles 12 cycles -65°C to +100°C 12 cycles -65°C to +100°C -40°C, +80°C -55°C, +80°C Test data supplied at these temperatures* Warranty Environmental compliance 2 years 2 years MIL-STD-810 MIL-STD-810 *Test data available for review or download from vicorpower.com Attenuation vs. Frequency (typical) 25 db Mechanical Drawing 30 db Attenuation 35 db 2.28 (57,9) 40 db 0.49 (12,4) 45 db 50 db 0.30±0.015 (7,6)±(0,38) 55 db 60 db 10 Hz 100 Hz 1 KHz 10 KHz 100 KHz 1 MHz 10 MHz 1.30 (33,0) 0.65 (16,5) 4 0.080 Dia (2) places Solder plate over copper alloy Pin # 1 2 3 4 5 6 7 8 9 9 Frequency 3 2.10 (53,4) Input to the converter (10V/cm) Output from the RAM (2mV/cm) 8 MI-RAM 7 2 6 1 5 1.40 1.00 (35,6) 0.70 (25,4) 0.40 (17,8) (10,2) 0.35± 0.015 (8,9)±(0,38) 0.15 (3,8) FULL R 0.15 (3,8) 1.90 (48,3) 0.040 (1,0) Dia (7) places Solder plate over copper alloy 2.40 (61,0) Product ID this surface 0.30 (7,6) Min. 0.22 (5,6) Min. 0.50 (12,7) 1 of 1 0.12 (3,0) 1.75 (44,4) Max. +0.030 (0,76) -0.000 (0) 0.01 MI-RAM 04/03 Function +In +Sense In –Sense In –In +Out +Sense NC –Sense –Out Aluminum Base