R-781.8-0.5 RECOM POWER

Efficiency up to 97%, no need for heatsinks Pin-out compatible with LM78XX linears Features Very low profile DC/DC Converter 4.75V - 32V Wide input range Short circuit protection, thermal shutdown Switching Low ripple and noise IEC/EN60950-1 certified Regulator R-78-0.5 Positive to negative converter Description 0.5 Amp The R-78xx-Series high efficiency switching regulators are ideally suited to replace 78xx linear SIP3 regultors and are pin compatible. The efficiency of up to 97% means that very little energy is wasted as heat so there is no need for any heat sinks with their additional space and mounting costs. Low ripple and noise figures and short circuit, overload and over-temperature protection round off the specifications of Single Output this versatile converter series. This R-78xx-0.5 is fully certified to EN55032 EMC Standard and for IEC/EN-60950-1 + AM2 Safety. Selection Guide Part Input Output Output Efficiency Number Voltage Range Voltage Current min Vin max. Vin VDC VDC A % % (1) R-781.5-0.5 4.75 - 30 1.5 0.5 73 63 R-781.8-0.5 4.75 - 32 1.8 0.5 82 71 R-782.5-0.5 4.75 - 32 2.5 0.5 87 77 (2) R-783.3-0.5 4.75 - 32 3.3 0.5 91 81 R-785.0-0.5 6.5 - 32 5.0 0.5 94 86 R-786.5-0.5 8.0 - 32 6.5 0.5 95 88 R-789.0-0.5 11 - 32 9.0 0.5 96 92 R-7812-0.5 15 - 32 12 0.5 97 94 R-7815-0.5 18 - 32 15 0.5 97 95 IEC/EN60950-1 certified Notes: EN55032 compliant Note1: 1.5V Output can be unstable with Vin>30VDC Note2: Refer to Transient Response on page I-3 Model Numbering R-78 -0.5 Output Voltage Output Current www.recom-power.com REV.: 5/2019 I-1R-78xx-0.5 DC/DC Converter Series Specifications (measured Ta= 25C, 10% minimum load, unless otherwise stated) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. Absolute Maximum Input Voltage 34VDC 5mA 7mA Quiescent Current nom. Vin= 24VDC 0.4W Internal Power Dissipation (3) Minimum Load 0% Internal Operating Frequency 280kHz 330kHz 380kHz 20MHz BW, without output 1.5 - 6.5VDC 20mVp-p 30mVp-p capacitor 9 - 15.5VDC 30mVp-p 40mVp-p Output Ripple and Noise 1.5VDC 15mVp-p 20mVp-p (4) 20MHz BW 1.8 - 15.5VDC 25mVp-p 35mVp-p Absolute Maximum 1 second start up, no external components 220F Capacitive Load <1 second start up + diode protection circuit 6800F Notes: Note3: Operation under no load will not harm the converter, but specifications may not be met A minimum load of 6mA is recommended Note4: Measurements are made with a 100nF MLCC across output (low ESR) Efficiency vs. Vin (full load) Ripple vs. Vin (full load) 100 50 15Vout 12Vout 90 45 9Vout 80 40 5Vout 3.3Vout 70 35 1.8Vout 60 30 1.5Vout 50 25 40 20 15, 12Vout 9Vout 30 15 5Vout 20 3.3Vout 10 1.8Vout 10 5 1.5Vout 0 0 0 5 10 15 20 25 30 34 0 5 10 15 20 25 30 34 Input Voltage VDC Input Voltage VDC Efficiency vs. Load (max. Vin) Ripple vs. Load (nom. Vin) 100 50 15Vout 12Vout 90 45 9Vout 80 40 5Vout 3.3Vout 70 35 1.8Vout 1.5Vout 60 30 50 25 40 20 15Vout 12Vout 30 15 5Vout 20 10 3.3Vout 1.8Vout 10 5 1.5Vout 0 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Output Load % Output Load % continued on next page www.recom-power.com REV.: 5/2019 I-2 Efficiency % Efficiency % Ripple mV Ripple mV