Recom R-78S3.3-0.1 User manual

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Evaluation Module
R-78S3.3-0.1 Evaluation Module
Description
The R-78S3.3-0.1 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 an 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.
Part
Number
Input
Voltage Range
Output
Max. Output
Voltage Current
Efficiency
(1)
Max. Capacitive
@ min. Vin @ max. Vin Load
(2)
[VDC]
[VDC]
[mA]
[%]
[%]
[µF]
R-78S3.3-0.1 0.65-3.15 3.3 100 92 93 470
Notes:
Note1: Efficiency is tested at 1.5V input voltage and full load.
Note2: Max. capacitive load is tested at nominal input and full resistive load.
Specifications (measured @ ta= 25°C, 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
Overload Capability
(3)
peak duty cycle 10% 150%, 10s
Quiescent Current 160µA
Start-up time 2ms
Rise Time 800µs
Internal Operating Frequency 1200kHz
Minimum Load 0%
Dropout Voltage 150mV
Output Ripple and Noise 20MHz BW 100mVp-p
ON/OFF CTRL DC-DC ON
DC-DC OFF
Open or 0.7V ≤V
CTRL
<Vin
Short to GND or V
CTRL
<0.1V
Input current of CTRL pin 5µA
Standby Current 7µA
Notes:
Note 3: For more information, please refer to “Overload Capability Graph” in the R-78S datasheet.
Features
Evaluation
Module
•3.3V from a single AA battery (boost converter o
r
from an external source
•Efficiency 93% , >80% at 10% load
•Input range down to 0.65V
•Input and output current measurement capability
•Micro-USB type B or 0.100” (2.54mm) pin output
R-78S3.3-0.1-EVM-1
Caution:
ESD sensitive. Always follow ESD preventative procedures when
handling the product !

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R-78S3.3-0.1-EVM-1
Evaluation Module
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R-78S Evaluation Module User Guide
Figure 1: R-78S3.3-0.1 output current vs. input voltage
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).
CONTENTS
•R-78S3.3-0.1 Evaluation Module PBA
•Micro-USB Type B to Micro-USB Type B Cable
•Terms and Conditions Letter

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R-78S3.3-0.1-EVM-1
Evaluation Module
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R-78S Evaluation Module User Guide
Figure 2: Component placement
Component List and Functions
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:
*CAUTION:*CAUTION:
*CAUTION: DO NOT PLACE A JUMPER ON J2. DOING SO WILL CAUSE THE BATTERY TO SHORT
CIRCUIT AND CREATE THE RISK OF FIRE

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R-78S3.3-0.1-EVM-1
Evaluation Module
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R-78S Evaluation Module User Guide
SCHEMATIC
Figure 3: Schematic
LAYOUT
Figure 4: TOP layer with components
Figure 5: BOTTOM layer

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R-78S3.3-0.1-EVM-1
Evaluation Module
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R-78S Evaluation Module User Guide
BOM
Figure 6: Bill of materials
The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit written
consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer
shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications.
Part Name/Number Description Manufacturer Part Number Manufacturer Qty. Comps.
BATTERY_HOLDER_AA HOLDER BATTERY 1CELL AA PC MNT 2460 Keystone Electron cs 1 BAT1
JUMPER_2PINS 2 POSITIONS HEADER CONNECTOR 0.100" (2.54MM) THT 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 H rose Electr c Co Ltd 1 CON1