C C S S O O R R E E M M T T P P R R L L I I E E A A V V N N N N T T Low cost switching regulator Features High start-up current capability Efficiency up to 95% DC/DC Converter Short circuit protection Switching Pin compatible with 78 series regulators Non isolated DC-DC converter Regulator R-78E-0.5 IEC/EN60950-1+ AM2 certified Description 0.5 Amp The R-78E series is a switching regulator module that has been designed to offer all the advantages of a 3 SIP3 switching regulator (high efficiency, wide input range, accurate output voltage regulation) but with a low cost for production quantities. Due to the R-78Es high efficiency of up to 95% no heat-sink is required. The compact TO-220 compatible SIP3 package measures only 11.6 x 8.5 x 10.4mm, so it saves Single Output precious board space. Selection Guide (1) Part Input Output Output Efficiency max. Capacitive (2) Number Voltage Range Voltage Current Load min. Vin max. Vin VDC VDC A F % % R-78E3.3-0.5 6-28 3.3 0.5 88 75 220 R-78E5.0-0.5 7-28 5 0.5 92 82 220 R-78E9.0-0.5 12-28 9 0.5 94 89 220 R-78E12-0.5 15-28 12 0.5 95 92 220 R-78E15-0.5 18-28 15 0.5 95 93 220 Notes: Note1: Efficiency is tested at full load at +25C ambient Note2: Max. Cap Load is tested by nominal input and full resistive load 2+ RoHS REACH compliant compliant 10 from 10 Model Numbering IEC60950-1 certified EN60950-1 certified R-78E -0.5 Output Voltage Output Current Specifications (measured Ta= 25C, full load, nominal input voltage and after warm-up) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. Input Voltage Range nom. Vin = 24VDC 6VDC 24VDC 28VDC Quiescent Current 1.5mA (3) Minimum Load 2% Internal Operating Frequency 570kHz 3.3, 5, 9Vout 50mVp-p (4) Output Ripple and Noise 20MHz BW 12, 15Vout 70mVp-p Notes: Note3: recommend to use with more than 2% load, if not, the ripple of the product may exceeds the specification, but doesnt af fect the reliability of the product Note4: Measurements are made with a 100nF MLCC across output (low ESR) continued on next page www.recom-power.com REV.: 7/2021 I-1 O O P P C C R R O O M M D D O O U U C C C C E E T T R R S SR-78E-0.5 DC/DC Converter Series Specifications (measured Ta= 25C, full load, nominal input voltage and after warm-up) Efficiency vs Load R-78E5.0-0.5 100 90 80 70 60 50 40 30 7Vin 12Vin 20 24Vin 10 28Vin 0 0 10 20 30 40 50 60 70 80 90 100 Output Load % REGULATIONS Parameter Condition Value Output Accuracy 3.0% typ. Line Regulation low line to high line, full load 0.5% typ. Load Regulation 10% to 100% load 1.0% typ. PROTECTIONS Parameter Condition Value Short Circuit Protection (SCP) continuous, automatic recovery ENVIRONMENTAL Parameter Condition Value Operating Temperature Range natural convection and with derating (see graph) -40C to +85C Maximum Case Temperature 100C Vibration 10-55Hz, 2G, 30min along X,Y,Z 3 +25C 7976 x 10 hours MTBF according to MIL-HDBK-217F, G.B. 3 +70C 2182 x 10 hours Derating Graph 100 90 80 70 60 50 40 30 20 10 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 85 Ambient Temperature C www.recom-power.com REV.: 7/2021 I-2 Output Load % Efficiency %