R-REF02-78S

3.3V from a single AA battery (boost converter) Features Efficiency 93%, >80% at 10% load Reference Design Input voltage range down to 0.65V Reference 0.100 (2.54mm) pin output 3.5mm mounting holes Design R-REF02-78S Description The R-REF02-78S generates 3.3V from a single AA battery and can directly be used in any application. The reference design contains a AA battery holder and an R-78S3.3-0.1 boost converter. Two jumper headers J1 and J2 ensure connectivity to the output voltage and the CTRL pin of the R-78S converter. The jumper header pins are standard 0.100 (2.54mm) pitch for which there are several mating connectors available. Two 3.5mm mounting holes are provided to allow snap-in or screw mounting. 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 Quiescent Current 160A 2ms Start-up Time 800s Rise Time 1200kHz Internal Operating Frequency 0% Minimum Load Dropout Voltage 150mV Output Ripple and Noise 100mVp-p DC-DC ON Open or 0.7V V <Vin CTRL ON/OFF CTRL DC-DC OFF Short to GND or V <0.1V CTRL 5A Input Current of CTRL Pin Standby Current 7A 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 Caution: ESD sensitive. Always follow ESD preventative procedures when handling the product www.recom-power.com REV.: 1/2018 P-1R-REF02-78S Reference Design 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). The output voltage is accessed via J1. To set the R-78S into sleep mode, short both pins of J2 (CTRL to GND). Component Placement VOUT GND J1 U1 BAT1 J2 GND CTRL Component List Part Description BAT1 AA battery holder U1 R-78S3.3-0.1 J1 2 pin 0.100 (2.54mm) header for VOUT and GND J2 2 pin 0.100 (2.54mm) header for CTRL and GND www.recom-power.com REV.: 1/2018 P-2 Maximum Output Current mA