Non-isolated Synchronous rectification design Features Adjustable output voltage DC/DC Converter 2, 3, 4 & 5AMP adjustable positive step down integrated switching regulator Switching Over load protection Continuous short circuit protection Regulator R-5xxxPA DA Efficiency up to 96% Description 2,3,4,5 Amp The R-5xxxA series is a high performance 1.2V to 5.5V, 2Amp to 5Amp, 12-Pin SIP (single in-line SIP12 package) integrated switching regulator (ISR). The synchronous - rectified design yields excellent efficiencies up to 96%. Short circuit protection reduces the short circuit input current to under 50mA. Vertical & Autosense function compensates for any losses in long circuit loops. Horizontal Selection Guide Single Output Part Input Output Vout Output Efficiency Max. Capacitive (1) (2) Number Voltage Range Voltage Adjust Range Current min Vin max. Vin Load VDC VDC VDC A % 12V % F R-521.2xA 4.5 - 18 1.2 1.0 - 3.0 2 83 79 75 300/6800 R-521.8xA 4.5 - 18 1.8 1.1 - 4.5 2 88 85 82 300/6800 R-522.5xA 4.5 - 18 2.5 1.6 - 5.5 2 91 88 86 300/6800 R-523.3xA 4.5 - 18 3.3 1.6 - 5.5 2 92 90 89 300/6800 R-525.0xA 6.5 - 18 5.0 3.0 - 5.5 2 95 93 92 300/6800 R-531.2xA 4.5 - 18 1.2 1.0 - 3.0 3 85 84 82 300/6800 R-531.8xA 4.5 - 18 1.8 1.1 - 4.5 3 89 88 86 300/6800 R-532.5xA 4.5 - 18 2.5 1.6 - 5.5 3 92 91 89 300/6800 R-533.3xA 4.5 - 18 3.3 1.6 - 5.5 3 94 93 92 300/6800 R-535.0xA 6.5 - 18 5.0 3.0 - 5.5 3 96 95 94 300/6800 R-541.2xA 4.5 - 18 1.2 1.0 - 3.0 4 82 81 79 300/6800 R-541.8xA 4.5 - 18 1.8 1.1 - 4.5 4 87 86 85 300/6800 IEC/EN60950-1 certified R-542.5xA 4.5 - 18 2.5 1.6 - 5.5 4 91 89 88 300/6800 R-543.3xA 4.5 - 18 3.3 1.6 - 5.5 4 93 92 91 300/6800 R-545.0xA 6.5 - 18 5.0 3.0 - 5.5 4 95 94 93 300/6800 R-551.2xA 4.4 - 18 1.2 1.0 - 3.0 5 81 80 78 300/6800 R-551.8xA 4.5 - 18 1.8 1.1 - 4.5 5 86 85 84 300/6800 R-552.5xA 4.5 - 18 2.5 1.6 - 5.5 5 90 89 88 300/6800 R-553.3xA 4.5 - 18 3.3 1.6 - 5.5 5 92 91 90 300/6800 R-555.0xA 7.0 - 1.8 5.0 3.0 - 5.5 5 94 93 92 300/6800 Notes: Note1: Vin-Vout 1.5V~4.0V depending on Vout if adjust function is used Note2: please refer to basic characteristics Model Numbering R-5 xA Output Current (A) (3) Pinning nom. Output Voltage Notes: Note3: x can be P= vertical through hole x can be D = bent for horizontal through hole mounting Ordering Examples: R-553.3PA Iout= 5A nom. Vout= 3.3VDC P= vertical through hole R-522.5DA Iout= 2A nom. Vout= 2.5VDC D= bent for horizontal through hole mounting www.recom-power.com REV.: 5/2019 I-1R-5xxxPA DA DC/DC Converter Series Specifications (refer to standard application circuit, Ta= 25C) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. 20mA Quiescent Current min. Vin to max. 1.4W Internal Power Dissipation ta<60C 2.5A 3.0A R-52xx 3.75A 4.25A R-53xx Output Current Limit 5.0A 5.5A R-54xx 6.0A 6.5A R-55xx Minimum Load 10% Open or high, 4.5V min. / 18V max. DC-DC ON (4) ON/OFF CTRL Low (Power OFF) 0.8V max. DC-DC OFF 100A Input Current of CTRL Pin DC-DC OFF Internal Operating Frequency 270kHz 300kHz 330kHz R-52xx 40mVp-p 70mVp-p Output Ripple and Noise R-53xx & R-54xx & R-55xx 80mVp-p 120mVp-p normal start-up time, no external diodes 300F 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 How to calculate the max. output current 100 85 The internal power dissipation (P ) follows the equation: D 80 P = Iout x Vout x (1-Eff ) D max Vin 60 P D Iout= 40 Vout x (1-Eff ) max Vin 20 0 0 0.5 1 1.4 Example: R-545.0P Internal Power Dissipation W Calculation 1: Calculation 2: Vin = 18V Vin = 18V Vout = 5V Vout = 5V 1.4W 1W Eff = 93% Iout= = 4.0A Eff = 93% Iout= = 2.857A max Vin max Vin 5V x (1-0.93 ) 5V x (1-0.93 ) P = 1.4W P = 1W D D T = 60C T = 85C Ambient Ambient Calculation 3: Vin = 12V Eff = 94% 1W max Vin Iout= = 3.33A P = 1.0W 5V x (1-0.94 ) D T = 85C Ambient continued on next page www.recom-power.com REV.: 5/2019 I-2 Ambient Temperature C