3.3V from a single AA battery or from Features an external source (boost converter) Evaluation Module Efficiency 93%, >80% at 10% load Input voltage range down to 0.65V Evaluation Input and output power measurement capability Module R-78S3.3-0.1-EVM-1 Micro-USB type B or 0.100 (2.54mm) pin output Description The R-78S3.3-0.1-EVM-1 Evaluation Module generates 3.3V from a single AA battery or from an external source. By using the external input source, any voltage source (other types of batteries, energy harvesters, etc.) in the range from 0.65V to 3.15V can be used. The evaluation module contains a AA battery holder, power switch, R-78S3.3-0.1 boost converter and a micro-USB connector. Jumper headers are provided to allow various test measurements to be made. An enable pin puts the R-78S into sleep mode where it draws only 7uA from the battery. 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-78S3.3-0.1 0.65-3.15 3.3 100 92 93 470 Specifications (measured ta= 25C, 1.5Vin, full load after warm up unless otherwise stated) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. Under Voltage Lockout DC-DC OFF 0.4VDC (3) Overload Capability peak duty cycle 10% 150%, 10s 160A Quiescent Current Start-up Time 2ms Rise Time 800s 1200kHz Internal Operating Frequency 0% Minimum Load 150mV Dropout Voltage Output Ripple and Noise 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 Notes: Note1: Efficiency is tested at full load. Typ. Vin = 1.5V Note2: Max. capacitive load is tested at nominal input and full resistive load Note3: For more information, please refer to Overload Capability Graph on page P-2 www.recom-power.com REV.: 2/2020 P-1R-78S3.3-0.1-EVM-1 Evaluation Module Specifications (measured ta= 25C, 1.5Vin, full load after warm up unless otherwise stated) Overload Capability Graph 150 140 120 100 80 60 40 peak current 20 continuous current 0 0.65 1.2 1.8 2.4 3.15 1.3 1.85 Input Voltage V Quick Start Guide Insert the AA battery into the battery holder (only one way possible). If powering USB-powered demonstrators: plug in the micro-USB cable. Turn on and off using the slide switch. Note: to reduce the power consumption, no indicator LED is fitted. Remember to switch off to conserve the battery. The output voltage is accessed via J7 or the USB port. To measure the input and output current of the R-78S, remove the jumpers on J4 and J5. J4 and J5 are standard 0.100 (2.54mm) pin headers to allow current measurement device connections (ampere meter, scope probe). When an external voltage source (no on-board battery) is used on J3, change the jumper position on J1 to pin 1 and pin 2 (VEXT). When the on-board AA battery is used, change the jumper position on J1 to pin 2 and pin 3 (VBAT). To set the R-78S into sleep mode, apply the provided jumper on both pins of J6 (CTRL to GND). Component Placement R-78SXX-0.1-EVM-1 FOR EVALUATION ONLY BAT1 GND GND J3 J2 VEXT VBAT J1 VEXT VBAT S1 CON1 I OUT J8 J5 D- D+ U1 OFF ON I IN J6 J7 J4 VOUT GND GND CTRL www.recom-power.com REV.: 2/2020 P-2 Maximum Output Current mA