Boost converter Features Efficiency 93% , >80% with 10% load Input range down to 0.65V DC/DC Converter Continuous short circuit protection Switching 7A input current in standby -40C to +100C operation Regulator R-78S IEC/EN62368-1 certified, CB report Description 0.1 Amp The R-78S is a DC/DC boost converter designed to run from single cell batteries. The SIP4 input voltage range of 0.65V-3.3V means that alkaline, NiCd, NiMH, zinc-carbon or lithium chemistry cells can be used to generate a stable 1.8V, 3.3V or 3.6V output to power microprocessors, Single Output WLAN/Bluetooth modules and IoT systems. The very high efficiency and low standby consumption can be used to extend battery lifetimes until the last gasp to get the maximum available energy out of the cell. The wide operating temperature of -40C to +100C, short circuit protection, OTP, Class A EMC and 3-year warranty round off this high performance converter. Selection Guide (1) Part Input Output Output Efficiency Max. Capacitive (3) (2) Number Voltage Range Voltage Current min Vin typ. Vin Load VDC VDC mA % % F R-78S1.8-0.1 0.65-1.3 1.8 100 92 93 470 R-78S3.3-0.1 0.65-3.15 3.3 100 92 93 470 R-78S3.6-0.1 0.65-3.3 3.6 100 92 93 470 Notes: Note1: Efficiency is tested at nom. input voltage and full load. (refer to Basic characterisitc below) Note2: Max. Cap Load is tested by nominal input and full resistive load Note3: For more information, please refer to Line Derating on page I-2 Model Numbering IEC/EN62368-1 certified R-78S- -0.1 CB report, EAC EN55032 compliant Output Voltage Output Current Specifications (measured Ta= 25C,1.5Vin, full load and after warm-up unless otherwise stated) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. 1.3VDC R-78S1.8-0.1 1.2VDC 1.2VDC 3.15VDC Input Voltage R-78S3.3-0.1 nom. Vin= 1.5VDC 0.65VDC 1.5VDC R-78S3.6-0.1 1.5VDC 1.5VDC 3.3VDC Under Voltage Lockout DC-DC OFF 0.4VDC (4) Overload Capability peak duty cycle 10% 150%, 10s Vout=1.8VDC 100A Quiescent Current Vout=3.3VDC 160A Vout=3.6VDC 180A Vout=1.8VDC, use E-cap 330F 4ms Start-up time 2ms Vout=3.3VDC and 3.6VDC Vout=1.8VDC, use E-cap 330F 3.5ms Rise time Vout=3.3VDC and 3.6VDC 800s 1200kHz Internal Operating Frequency Notes: www.recom-power.com/eval-ref-boards Note4: For more information, please refer to Overload Capability Graph on page I-2 continued on next page www.recom-power.com REV.: 5/2018 I-1R-78S DC/DC Converter Series Specifications (measured Ta= 25C,1.5Vin, full load and after warm-up unless otherwise stated) Parameter Condition Min. Typ. Max. Minimum Load 0% Vout= 1.8VDC 500mV Dropout Voltage Vout= 3.3VDC 150mV Vout= 3.6VDC 300mV Output Ripple and Noise 20MHz BW, 10%-100% load 100mVp-p DC-DC ON Open or 0.7V VCTRL<Vin ON/OFF CTRL DC-DC OFF Short to GND or VCTRL<0.1V 5A Input Current of CTRL pin 7A Standby Current Efficiency vs. Load R-78S1.8-0.1 R-78S3.3-0.1 100 100 80 80 60 60 40 40 1.2Vin 20 1.5Vin 20 1.3Vin 2.4Vin 3.0Vin 0 0 0 20 40 60 100 0 20 40 60 80 90 100 Output Current % Output Current % R-78S3.6-0.1 Overload Capability 100 Peak Current Continuous Current 80 150 60 100 40 90 1.5Vin 2.0Vin 20 2.5Vin 3.0Vin 3.3Vin 0 0 20 30 120 130 0 20 40 60 80 100 Time s Output Current % Line Derating Continuous Current Peak Current 100 150 80 140 60 130 40 120 1.8Vout 20 110 3.3Vout 3.3Vout 3.6Vout 3.6Vout 0 100 0.65 1.2 1.45 1.8 2.4 3.0 3.3 0.65 1.2 1.45 1.8 2.4 3.0 3.3 1.85 2.1 1.3 3.15 1.3 3.15 Input Voltage V Input Voltage V www.recom-power.com REV.: 5/2018 I-2 Efficiency % Efficiency % Maximum Output Current % Efficiency % Maximum Output Current % Output Current %