MEDICAL & MILITARY MI-RAM Series M I L I TA R Y C O T S O U T P U T R I P P L E AT T E N U AT O R M O D U L E S Features • • • • • • • • Compatible with all MI- series modules Military Specification Compliance Environments: MIL-STD-810 Efficiency 93-99% Operating Temperature to 100°C No adjustment required Reduces output PARD to < 10mVp-p Full attenuation up to 20A load Specifications STANDARDS AND APPROVALS INPUT Input Voltage Range 5Vdc to 50Vdc DC Voltage Drop 0.34 to 0.38 No load to full load OUTPUT Efficiency 93 to 99% Output Noise & Ripple MI-200: 2mVp-p typical 10%-100% load MI-J00: 6mV p-p typical 10%-100% load Output Voltage Accuracy 99.5% to 100.5% DC Voltage Drop 0.34 to 0.38 No load to full load Full Load Current MI-RAM-I1: 10A MI-RAM-M1: 10A MI-RAM-I2: 20A MI-RAM-M2: 20A ±50% nom line voltage per MIL-STD-6051 50ms Conducted EMI CE102 per MIL-STD-461D Environmental (MIL-STD-810D) Altitude – Method 500.2 40,000 ft Humidity - Method 507.2 86,240 % hours Acceleration – Method 513.3 9 g’s Vibration – Method 514.3 20 g’s Shock – Method 516.3 40 g’s Reliability (MIL-HDBK-217E) OPERATING Isolation Characteristics Spikes Input / Output / Base 250V rms ENVIRONMENTAL 25°C Ground Benign 885,917 hours 50°C Naval Sheltered 87,068 hours 65°C Airborne inhabited cargo 49,153 hours MECHANICAL Part number MI-RAM-I2 MI-RAM-M2 Weight 85 grams Storage Temperature -55°C to +125°C -65°C to +125°C Dimensions 57.9 x 61 x 12.7mm Operating Temperature (baseplate) -40°C to +100°C -55°C to +100°C Power Cycling Burn-in 12hrs 25 cycles 96hrs 200 cycles Temperature Cycling 48 hrs, 12cycles -65°C to +100°C 48hrs, 12cycles -65°C to +105°C Test Data Supplied at these -40°C, +80°C Temperatures Derating NAVMATP-4855-1A -55°C, +80°C Electrical Considerations TRANSIENT RESPONSE AND DYNAMIC RANGE: Full rated noise attenuation will be maintained at the MI-RAM output for step load changes up to 10% of the rated output current of the source converter, with the MI—RAM exhibiting an underdamped output excursion of less than 10mV pp. Some degradation in noise attenuation during the transient response period following the step may be exhibited for larger load changes. Adding output capacitance to the MI-RAM will increase the dynamic rejection range. SENSE CONNECTION: Both sense-in and sense-out connections are provided on the MI-RAM. Sensein connections must be connected to the corresponding sense connections on the Vicor converter from which the MI-RAM is powered. Sense-out pins on the MI-RAM must be connected either directly to the MI-RAM power-output pins, or at the point of load. OUTPUT LOAD CHARACTERISTICS: When used in combinations with Vicor DC-DC converters, and with sense leads connected, the MI-RAM will be stable for any non-inductive load. 380