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| MD5A SERIES 12/ 24/ 48V Input Description The MD5A is a full-featured, dual output, non-isolated DC-DC converter providing over 35 watts of power in a small SMT package. These high efficiency converters have two 5 Amp outputs to power today's microprocessors, ASICs, and DSPs. Each output uses an external trim resistor to set the output voltage, allowing variable control. The outputs come up simultaneously and each output has a separate on/off control, allowing them to be sequenced. Both outputs include short circuit protection and have remote sense. A phase-shifted synchronization approach significantly reduces ripple and noise on the input line. The MD5A uses Bourns Switch Power's patented V 2TM technology to ensure extremely fast transient response. Features * Dual 5 Amp Outputs * 90 % Efficiency * Independently Programmable Outputs * Low 0.4 " Profile * Phase Shifted Synchronization * Improved Input Filtering * Short Circuit Protection with auto-restart * Independent Enable for Sequencing * Simultaneous Startup tracking * Remote Sense * Fast Transient Response * High-temperature Operation * Accepts Output Pre-charge * EN55022 Class A Temperature Regulation General MTBF Operating Temperature Full Power Storage Temperature Switching Frequency Input Voltage Current Remote Enable High = Enable Low = Disable Common Specifications Min 10.8 Nom 12 Max 13.2 4 2.3 0.2 Units Vdc A Vdc Vdc Notes each output Open = Disable Outputs (each output) Current Current Limit Line Regulation Load Regulation Ripple Dynamic Response 50 to 100 % load 100 to 50 % load 0 6 5 8 5 7 20 50 50 50 50 50 0.01 A A mV mV mV pp mV pp mV s mV s %/C over full line range over full load range 1.25 Vout (see App Diag) 3.3 Vout i/t = 0.2A/s i/t = 0.2A/s 1000 0 0 -55 500 70 55 125 KHrs C C C KHz 25 C, 60 % load See Derating Curve 100 LFM Asia-Pacific: TEL +886- (0)2 25624117 * FAX +886- (0)2 25624116 Europe: TEL +41-41 768 5555 * FAX +41-41 768 5510 The Americas: TEL +1-951 781 5500 * FAX +1-951 781-5700 Reliable Electronic Solutions www.bourns.com Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. MD5A SERIES 12/ 24/ 48V Input Electrical Specifications Input (V) MD5A-12DA 12 Vout1 (V) 1 - 3.5 Iout1 (A) 5 Vout2 (V) 1 -3.5 Iout2 (A) 5 Noise Efficiency (mV pp) max (%) 50 89 Each output separately adjustable using an external trim resistor from TRIM to GND. See application circuit below. 0 Top View 0.10 0 0.100 0.200 (1) (2) (3) (20) (19) (18) (17) (16) (15) (14) (13) (12) (11) 1.50 (38.1) Side View 0.40" max 0.20" 1.420 0.500 0.040 typ 0.900 0.080 typ (6) (7) (8) (9) (10) 1.10 (27.9) 15 0.100 Pin 1, 2, 3 6 7 8, 9,10 11 12, 13 14 15, 16 17 18,19 20 Function Vin Enable_1 Enable_2 Gnd Rsns_2 Vout_2 Vset_2 Gnd Vset_1 Vout_1 Rsns_1 inches (mm) 0.xx 0.01 inches 0.xxx 0.005 inches 0.04" typ RVset = 22.9/(Vout - 1) - 5.76 (k) MD5A-12DA Vset Vset1 or Vset2 RVset Vset 1.00 1.25 1.50 1.60 1.80 2.50 3.30 3.50 RVset Open 82.5K 39.2K 32.4K 22.6K 9.53K 4.32K 3.48K + *68F/20V Tantalums + Vin Vout1 + *47F/6.3V 50m Al-Polymer Vout2 + *47F/6.3V 50m Al-Polymer REV. 02/05 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. |
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