12/ 24/ 48V MD5A SERIES 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 2™ technology to ensure extremely fast transient response. Common Specifications 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 Input Voltage Min Nom Max Units 10.8 12 13.2 Vdc 4 A Current Remote Enable High = Enable Low = Disable Outputs (each output) Current Current Limit Line Regulation Load Regulation Ripple 2.3 0.2 0 6 • Accepts Output Pre-charge • EN55022 Class A 5 8 ±5 ±7 20 50 Dynamic Response 50 to 100 % load 50 50 50 50 100 to 50 % load • Fast Transient Response • High-temperature Operation Temperature Regulation General MTBF Operating Temperature Full Power Storage Temperature Switching Frequency Vdc Vdc mV µs mV µs ±0.01 %/°C 70 55 125 KHrs °C °C °C KHz 1000 0 0 -55 500 A A mV mV mV pp mV pp Notes each output Open = Disable over full line range over full load range 1.25 Vout (see App Diag) 3.3 Vout ∆i/∆t = 0.2A/µs ∆i/∆t = 0.2A/µs 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. 12/ 24/ 48V MD5A SERIES Input Electrical Specifications MD5A-12DA Input (V) Vout1 (V) Iout1 (A) Vout2 (V) Iout2 (A) 12 1 - 3.5 5 1 -3.5 5 Noise Efficiency (mV pp) max (%) 50 89 1.420 Each output separately adjustable using an external trim resistor from TRIM to GND. See application circuit below. 0 Top View 0.10 (1) (20) 0.100 0.200 (2) (3) 0.500 (6) (7) (8) (9) (10) (19) (18) (17) (16) (15) (14) (13) (12) (11) 0 0.040 typ 0.900 Pin 1, 2, 3 6 7 8, 9,10 11 12, 13 14 15, 16 17 18,19 20 1.10 (27.9) 15 ◊ 0.100 0.080 typ Function Vin Enable_1 Enable_2 Gnd Rsns_2 Vout_2 Vset_2 Gnd Vset_1 Vout_1 Rsns_1 1.50 (38.1) Side View inches (mm) 0.xx ±0.01 inches 0.xxx ±0.005 inches 0.40" max 0.20" 0.04" typ RVset = 22.9/(Vout - 1) - 5.76 (kΩ) 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 + + Vin Vout1 + *47µF/6.3V 50m Al-Polymer *68µF/20V Tantalums Vout2 + *47µF/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.