www.recom-power.com rev.: 0/2017 p-1 features evaluation module ? 3.3v from a single aa battery or from an external source (boost converter ) ? effciency 93%, >80% at 10% load ? input voltage range down to 0.65v ? input and output power measurement capability ? micro-usb type b or 0.100 (2.54mm) pin output basic characteristics parameter condition min. typ. max. under voltage lockout dc-dc off 0.4vdc overload capability (3) peak duty cycle 10% 150%, 10s quiescent current 160a start-up time 2ms rise time 800s internal operating frequency 1200khz minimum load 0% dropout voltage 150mv output ripple and noise 100mvp-p on/off ctrl dc-dc on dc-dc off open or 0.7v vctrl www.recom-power.com rev.: 0/2017 p-2 overload capability graph quick start guide component placement maximum output current [ma] input voltage [v] 0.65 0 20 40 60 80 100 120 150 140 1.3 1.85 1.2 1.8 3.15 2.4 peak current continuous current ? 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 tted. 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). j3 j1 vext vext vbat off on i_in i_out vbat gnd gnd ctrl vout gnd d- d+ gnd j4 j6 j7 j5 j8 con1 for evaluation only r-78sxx-0.1-evm-1 s1 u1 j2 bat1 evaluation module specifcations (measured @ ta= 25c, 1.5vin, full load after warm up unless otherwise stated) r-78s3.3-0.1-evm-1
www.recom-power.com rev.: 0/2017 p-3 schematic component list part description setting bat1 aa battery holder j1 3 pin 0.100 (2.54mm) header for vext and vbat factory set to on-board battery j2* 2 pin 0.100 (2.54mm) header for vbat and gnd leave open if not used j3 2 pin 0.100 (2.54mm) header for vext and gnd leave open if not used j4 2 pin 0.100 (2.54mm) header for input current leave closed if not used j5 2 pin 0.100 (2.54mm) header for output current leave closed if not used j6 2 pin 0.100 (2.54mm) header for ctrl (enable) and gnd leave open if not used j7 2 pin 0.100 (2.54mm) header for vout and gnd leave open if not used j8 2 pin 0.100 (2.54mm) header for usb d+ and d- leave open if not used s1 slide switch factory set off con1 usb micro b connector u1 r-78s3.3-0.1 boost converter *caution: do not place a jumper on j2. doing so will cause the battery to short circuit and create the risk of fire. vin vout gnd ctrl gnd gnd 1 3 2 2 2 1 4 j7 0022032021 002032021 u1 r-78s3.3-0.1 r-78s gnd gnd 0022032021 j8 0022032021 j5 zx62d-b-5p8 gnd vcc usb d+ d- nc con1 1 4 1 2 5 2 3 2 1 j6 0022032021 0022032021 0022032021 gnd j4 j1 j2 j3 bat1 gnd s1 2460 2 1 1 3 1 2 2 1 3 mhsi22 22-03-2031 2 1 1 2 1 2 evaluation module specifcations (measured @ ta= 25c, 1.5vin, full load after warm up unless otherwise stated) r-78s3.3-0.1-evm-1
www.recom-power.com rev.: 0/2017 p-4 layout bom top layer bottom layer part name/number description manufacturer part number manufacturer qty. comps. battery_holder_aa holder battery 1cell aa pcb mnt 2460 keystone electronics 1 bat1 jumper_2pins 2 positions header connector 0.100" (2.54mm) through hole tin 0022032021 molex 7 j2 j3 j4 j5 j6 j7 j8 jumper_3pins conn header 3pos .100 vert tin 22-03-2031 molex 1 j1 mhs122 switch slide spdt 300ma 30v mhs122 apem inc 1 s1 r-78s3.3-0.1 dc dc converter 3.3v r-78s3.3-0.1 recom 1 u1 zx62d-b-5p8 conn rcpt usb micro b smd zx62d-b-5p8 hirose electric co ltd 1 con1 x evaluation module specifcations (measured @ ta= 25c, 1.5vin, full load after warm up unless otherwise stated) r-78s3.3-0.1-evm-1
www.recom-power.com rev.: 0/2017 p-5 the product inf orma tion and speci?ca tions ma y be subject to changes even without prior written notice.the product has been designed f or various a pplica tions; its suita bility lies in the responsibility of each customer . the products are not authorized f or use in safety-critical a pplica tions without recom? s explicit written consent. a safety-critical a pplica tion is an a pplica tion where a failure ma y reasona bl y be expected to endanger or cause loss of life, in?ict bodil y harm or dama ge property . the a pplicant shall indemnify and hold harmless recom, its af?lia ted companies and its representa tives a gainst an y dama ge claims in connection with the unauthorized use of recom products in such safety-critical a pplica tions. ? r-78s3.3-0.1-evm-1 evaluation module pba ? micro-usb type b to micro-usb type b cable ? terms and conditions letter contents evaluation module specifcations (measured @ ta= 25c, 1.5vin, full load after warm up unless otherwise stated) r-78s3.3-0.1-evm-1
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