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| Mespek Oy, PL103, 00701 Helsinki Puh. (09)3507360 Fax (09)3453384 E-mail: mespek@mespek.com http://www.mespek.com UM3500 SERIES 40 Watts DC-DC Converters Synchronous-Rectifier Topology Remote On/Off Control Continuous Short Circuit Protection High Efficiency Non-Isolated Current Share Function NOTES: 1. Measure from high line to low line. 2. Measure from full load to 1/2 load. 3. Measured with 1uF ceramic cap. Connected to the output pins. 4. Output Power 100% SPECIFICATIONS All specifications are typical at nominal line, full load and 25C unless otherwise noted. INPUT SPECIFICATIONS Input Voltage Range, 5V ... ... ... ... ... ..... ... ... ... ... 4.75-5.5V 12V ... ... ... ... ... ... .... ... ... ... 10.4-13.6V Input Filter ... ... ... ... ... ... ... ... ... ... ... ... ..... ... ... ... Capacitive Operating Temperature (C) -25 50 100 OUTPUT SPECIFICATIONS Voltage Accuracy .... ... ... ... ... ... ... ... ... ... ... ... .... 2 % max. Transient Response(25% Step Load Change) ... .. <500gS Line Regulation 1 ... ..... ... ... ... ... ... ... ... ... ... ... .. 0.5% max. 2 Load Regulation ... ... ... ... ... ... ... ... ... ... ... ..... . 0.7% max. Ripple and Noise, 20MHz BW3 ... ... ... ... .... 75mV P-P max. Temperature Coefficient ... ... ... ... ... ... ....0.02%/C max. Short Circuit Protection .... ... ... ... ... ... ... ..... ... Continuous Automatic Recovery Maximum case temperature must not be exceeded 100C. 5. UM3500 series can be used as parallel connection to provide current share function. The current that each converter delivers will thus be 1/N of the total current, if there are N total converters in parallel. Limitations to this scheme are dependent primarily on matching of the resistances in the converter: mismatch in resistance results in one converter delivering more current than another. When using this current share function, Pin 1(SYNC) and Pin 3(PWM) must be connected to each other or be floating if used as single unit. REMOTE ON/OFF CONTROL Logic Compatibility... ... ... ... ... .CMOS or Open Collector TTL Converter ON.... ... ... ... .... ... ... ... >+2.5 VDC or Open Circuit Converter OFF... ... ... ... ... ... ... ... .<+0.8 VDC or Short Circuit Control Common... ... ... ... ... ..... ... .Referenced to Input Minus GENERAL SPECIFICATIONS Efficiency .... ... ... ... ... ... ... ... ... ... ... ... ... ... ..... .... See Table Switching Frequency ... ..... ... ... ... ... ... ... ... ... .. 200KHz typ. 4 Operating Temperature Range ... .... ... .... -25C to +100C Storage Temperature ....... .... ... ... ... ... ... ... -40C to+105C Cooling ... ... ... ... ... ... ... ... ... ... ..... ... ... Free Air Convection Dimensions ... ... ... ... ... ... ... ... .... ... ... ..... 2 x 1 x 0.4 inches (50.8 x 25.4 x 10.2mm) Case Material ... ... ... ..... ... ... ... Black-Coated Copper with Non-Conductive Base UNIVERSAL MICROELECTRONICS UM3500 1 of 2 3,27TH RD., TAICHUNG INDUSTRIAL PARK, TAICHUNG, TAIWAN, R.O.C. TEL: 886-4-23590096 FAX: 886-4-23590129 REV.1 MODEL NUMBER INPUT VOLTAGE OUTPUT VOLTAGE OUTPUT CURRENT INPUT CURRENT NO LOAD 70 mA FULL LOAD 9103 mA % EFF (min.) 87 B CASE UM3501 5 VDC 3.3 VDC 12A UM3511 12 VDC 3.3 VDC 10A 50 mA 3235 mA 85 B NOTE: Other output voltage can be supported upon request. CASE B (7.62) (5.08) (7.62) 0.300" 0.200" 0.300" 0.040" O .005" 0 (1.0 DIA.) 1 2 3 PIN CONNECTIONS Pin Pin Function Number 1 SYNC 2 Remote On/Off 3 PWM 4 +Output 5 -Output 6 -Input 7 +Input All dimensions in inches (mm). Tolerance .xx =0.04 .xxx=0.010 2.00" (50.80) 1.800" (45.72) BOTTOM VIEW 0.063" .01" O 0 (1.6 DIA.) 7 6 5 4 0.10" (2.54) 0.10" (2.54) 0.200" 0.200" (5.08) (5.08) 0.800" (20.32) 1.00" (25.40) 0.18"O0.02" 0.40" (4.6O .5) 0 (10.20) UNIVERSAL MICROELECTRONICS UM3500 2 of 2 3,27TH RD., TAICHUNG INDUSTRIAL PARK, TAICHUNG, TAIWAN, R.O.C. TEL: 886-4-23590096 FAX: 886-4-23590129 REV.1 |
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