MicroRAM RAMxxxx Actual Size: 2.28 x 1.45 x 0.5in 57,9 x 36,8 x 12,7mm Output Ripple Attenuation Module Features & Benefits Absolute Maximum Ratings RoHS Compliant (with F or G pin option)Parameter Rating Unit Notes 30 V Continuous DC >40dB ripple attenuation from +IN to IN 40 V 100ms 1.1kHz to 1MHz DC Load current 40 A 10 second pulse DC >40dB ripple attenuation from 100Hz V V 1V V Continuous to 1.1kHz with additional component REF IN DC 100 mV 100Hz 100kHz Integrated ORing diode supports Ripple Input (V ) P-P 500 mV 100kHz 2MHz N+1 redundancy . 4 6 In lbs Significantly improves load Mounting torque 6 each, 4-40 screw . 0.45 0.68 N m transient response 500 260 F C <5sec wave solder Pin soldering temperature Efficiency up to 98% 750 390 F C <7sec wave solder User selectable performance optimization Thermal Resistance Combined active and passive filtering 3 30V input range Parameter Typ Unit DC Baseplate to sink 20 and 30 Ampere ratings flat, greased surface 0.16 C/Watt with thermal pad (P/N 20265) 0.14 C/Watt Baseplate to ambient Product Highlights free convection 8.0 C/Watt The Vicor MicroRAM output ripple attenuation 1000LFM 1.9 C/Watt module combines both active and passive filtering to achieve greater than 40dB of noise attenuation from 1.1kHz to 1MHz. The lower Part Numbering frequency limit can be extended down to 100Hz, with greater than 40dB of attenuation, RAM 2 C 2 1 with the addition of a single external capacitor. The MicroRAM operates over a range of 3 30V , is available in either 20 or30A DC Type Product Grade Temperatures (C) Pin Style Baseplate models and is compatible with most Product 1 = Short Pin Grade Operating Storage 2 = 20A 1 = Slotted manufacturers switching converters including all 2 = Long Pin C = 20 to +100 40 to +125 a 3 = 30A 2 = Threaded S = Short ModuMate T = 40 to +100 40 to +125 Vicor DC-DC converter models. a 3 = Thru-hole N = Long ModuMate H = 40 to +100 55 to +125 F = Short RoHS M = 55 to +100 65 to +125 The MicroRAMs closed-loop architecture G = Long RoHS b K = Extra-Long RoHS greatly improves load transient response and can insure precise point-of-load voltage regulation using its SC function. The MicroRAM supports redundant and parallel operation with its integrated ORing diode function. It is available in Vicor standard Micro package (quarter brick) with a variety of terminations for through-hole, socket or a Compatible with the ModuMate interconnect system for socketing and surface mounting surface-mount applications. b Not intended for socket or Surfmate mounting Note: Product images may not highlight current product markings. MicroRAM Rev 2.6 Page 1 of 19 08/2020RAMxxxx Electrical Characteristics Electrical characteristics apply over the full operating range of input voltage, output power and baseplate temperature, unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate. RAM Module Specifications (20 to +100C baseplate temperature) Parameter Min Typ Max Unit Notes Operating current range No internal current limiting. Converter input must be properly fused 0.02 20 A RAM2xxx such that the RAM output current does not exceed the maximum operating current rating by more than 30% under a steady state Operating current range 0.02 30 A condition. RAM3xxx Operating input voltage 3.0 30 V Continuous Transient output response 50 mV Step load change see Figures 20, 23, & 26, pp. 16 17 P-P Load current step < 1A/sec Transient output response Optional capacitance C can be used to increase transient current TRAN Load current step < 1A/sec 50 mV P-P capability See Figures 21, 24 & 27, pp. 16 17 (C = 820F) TRAN Recommended headroom voltage See Figures 4 and 5, p. 5 for detailed explanation. See Table 1 for 325 425 mV c range (V ) 1A load typical headroom setting resistor values. HR Output ripple Ripple frequency of 60Hz to 100kHz optional CHR capacitor of 10 mV P-P 100F required to increase low frequency attenuation as shown in 5 MV Input V = 100mV Figure 2, p. 3 P-P RMS Output ripple 10 mV P-P Ripple frequency of 100kHz to 2MHz as shown in Figure 2, p. 3 5 MV Input V = 500mV RMS P-P d SC output voltage 1.23 V See table 1 for typical R values, note 2 for calculation. DC SC ORing threshold 10 mV V V IN OUT RAM bias current 60 mA Power dissipation 7.5 W V = 28V I = 20A IN OUT RAM2xxx V = 380mV 1A HR Power dissipation 11.5 W V = 28V I = 30A IN OUT RAM3xxx V = 380mV 1A HR c The headroom voltage V is the voltage difference between the V and the V pins of the RAM. HR IN+ OUT+ V OUT+ R = 2.3k (See Table 1 for example R values) HR HR V HR d The SC resistor is used to trim the converters output voltage (Vnom) to compensate for the headroom voltage drop of the RAM when remote sense is not used. This feature can only be used with converters that have a trim reference range between 1.21 and 1.25V. (V 1k) NOM R = 2k (See Table 1 for example R values) SC SC 1.23V RAM Output Voltage V 1A R Value () R Value () HR HR SC 3V 375mV 18.2k 442 5V 375mV 30.9k 2.05k 12V 375mV 73.2k 7.68k 15V 375mV 90.9k 10.20k 24V 375mV 147.0k 17.40k 28V 375mV 174.0k 21.00k Table 1 Calculated values of R and R for a headroom voltage of 375mV. SC HR Use notes 1 and 2 to compute R and R values for different headroom voltages. SC HR MicroRAM Rev 2.6 Page 2 of 19 08/2020