UM3501 Datasheet | Unknown Manufacturer

Mespek Oy, PL103, 00701 Helsinki Puh. (09)3507360 Fax (09)3453384 E-mail: mespek@mespek. http://.mespek. UM3500 SERIES 40 Watts DC-DC Converters - Synchronous-Rectifier Topology - Remote On/Off Control - Continuous Short Circuit Protection ..net - High Efficiency - Non-Isolated - Current Share Function SPECIFICATIONS All specifications are typical at nominal line, full load and 25°C unless otherwise noted. NOTES: 1. Measure from high line to low line. 2. Measure from full load to 1/2 load. 3. Measured with 1u F ceramic cap. Connected to the output pins. 4. Output Power 100% INPUT SPECIFICATIONS Input Voltage Range, 5V … … … … … ..… … … … … 4.75-5.5V 12V … … … … … … .… … … … 10.4-13.6V Input Filter … … … … … … … … … … … … ..… … … ... Capacitive Operating Temperature (°C) -25 OUTPUT SPECIFICATIONS Voltage Accuracy .… … … … … … … … … … … … .… ± 2 % max. Transient Response(25% Step Load Change) … .. <500£g S Line Regulation 1 … ..… … … … … … … … … … … .. ±0.5% max. 2 Load Regulation … … … … … … … … … … … ..… . ±0.7% max. Ripple and Noise, 20MHz BW3 … … … … .… 75m V P-P max. Temperature Coefficient … … … … … … .…±0.02%/°C max. Short Circuit Protection .… … … … … … … ..… … Continuous Automatic Recovery Maximum case temperature must not be exceeded 100°C. 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 patibility… … … … … .CMOS or Open Collector TTL Converter ON.… … … … .… … … … >+2.5 VDC or Open Circuit Converter OFF… … … … …...