C C S S O O R R w E E M M T T P P R R a L L R I I E E A A r V V N N A N N T T r Non-isolated Synchronous rectification design Features Adjustable output voltage DC/DC Converter 2, 3, 4Amp adjustable positive step down Integrated switching regulator Switching Over load protection Continuous short circuit protection Regulator R-7xxxP D Efficiency up to 97% Description 2,3,4 Amp The R-7xxx series is a high performance 2.5V to 17V, 2Amp to 4Amp, 12-Pin SIP (single in-line 3 SIP12 package), integrated switching regulator (ISR). The synchronous - rectified design yields excellent efficiencies up to 97%. Short circuit protection reduces the short circuit input current to under 50mA. Vertical & Horizontal Selection Guide Part Input Output Vout Output Efficiency Max. Capacitive Single Output (1) (2) Number Voltage Range Voltage Adjust Range Current min Vin max. Vin Load VDC VDC VDC A % % F R-723.3x 4.5 - 28 3.3 2.5 - 5.5 2 95 89 200/6800 R-725.0x 6.5 - 28 5.0 3.0 - 5.5 2 96 91 200/6800 R-726.5x 8.5 - 28 6.5 5.0 - 8.0 2 97 93 200/6800 R-729.0x 12 - 28 9.0 7.0 - 11 2 96 93 200/6800 R-7212x 15 - 28 12 10 - 14 2 97 95 200/6800 R-7215x 19 - 28 15 13 - 17 2 97 96 200/6800 R-733.3x 4.5 - 28 3.3 2.5 - 5.5 3 94 89 200/6800 R-735.0x 6.5 - 28 5.0 3.0 - 5.5 3 95 92 200/6800 R-736.5x 8.5 - 28 6.5 5.0 - 8.0 3 97 93 200/6800 R-739.0x 12 - 28 9.0 7.0 - 11 3 96 94 200/6800 R-7312x 15 - 28 12 10 - 14 3 97 96 200/6800 22++ RoHSRoHS REACHREACH compliantcompliant R-7315x 19 - 28 15 13 - 17 3 97 96 200/6800 compliantcompliant 10 from 1010 from 10 R-743.3x 4.5 - 28 3.3 2.5 - 5.5 4 93 88 200/6800 R-745.0x 6.5 - 28 5.0 3.0 - 5.5 4 95 91 200/6800 IEC/EN60950-1 certified R-746.5x 8.5 - 28 6.5 5.0 - 7.5 4 96 93 200/6800 Notes: Note1: Vin-Vout 1.5V~4.0V depending on Vout if adjust function is used Note2: Please refer to basic characteristics on page I-2 Model Numbering R-7 x (3) Pinning Output Current (A) nom. Output Voltage Notes: Note3: x can be P = vertical through hole x can be D = bent pins for horizontal through hole mounting Ordering Examples: R-723.3P Iout= 2A nom. Vout= 3.3VDC P= vertical through hole R-7312D Iout= 3A nom. Vout= 12VDC D= horizontal through hole www.recom-power.com REV.: 7/2020 I-1 O O P P E a C C R R O O Y M M n D D O O U U t C C C C E E y T T R R S SR-7xxxP D DC/DC Converter Series Specifications (refer to standard application circuit, Ta= 25C) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. 30mA Quiescent Current min. Vin to max. 1.4W Internal Power Dissipation ta<60C R-72xxx 2.5A 3.0A Output Current Limit R-73xxx 3.75A 4.25A R-74xxx 5.0A 5.5A Minimum Load 10% Open or high, 4.5V min. / 28V max. DC-DC ON (4) ON/OFF CTRL Low (Power OFF) 0.8V max. DC-DC OFF Input Current of CTRL Pin DC-DC OFF 100A Internal Operating Frequency 270kHz 300kHz 330kHz Output Ripple and Noise 40mVp-p 70mVp-p normal start-up time, no external diodes 200F Maximum Capacitive Load <1 second start-up time + diode protection circuit 6800F Notes: Note4: ON/OFF pin driven by TTL (logic gate), open-collector bipolar transistor or open-drain MOSFET 100 How to calculate the max. output current 85 The internal power dissipation (P ) follows the equation: D 80 P = Iout x Vout x (1-Eff ) 60 D max Vin 40 P D Iout= 20 Vout x (1-Eff ) max Vin 0 1.4 0 0.5 1 Internal Power Dissipation W Example: R-745.0P Calculation 1: Calculation 2: Vin = 28V Vin = 28V Vout = 5V Vout = 5V 1.4W 1W Eff = 91% Eff = 91% = 3.11A = 2.222A max Vin Iout= max Vin Iout= 5V x (1-0.91 ) 5V x (1-0.91 ) P = 1.4W P = 1.0W D D T = 60C T = 85C Ambient Ambient Calculation 3: Vin = 12V Eff = 94% max Vin 1W Iout= = 3.33A P = 1.0W D 5V x (1-0.94 ) T = 85C Ambient continued on next page www.recom-power.com REV.: 7/2020 I-2 Ambient Temperature C