R-78AA-1.0 Datasheet, PDF (3/4 Pages) Recom International Power – 1.0 AMP SMD Single Output

INNOLINE
DC/DC-Converter
Standard Application Circuit
+Vin
On/Off
R-78AAxx-1.0 SMD
Series
1,2 _{R-78Axx-1.0 SMD} 4,5
R1
10 3,7,8,9 6
R2
+Vout
GND
GND
Application Examples
3.3V/5V Selectable 1A Power Supply
+Vin
R-78A3.3-1.0SMD
Vout = 3.3V
or 5.0V @ 1A
On/Off
6.8kW
GND
GND
3.3V/5V
Select
(TTL)
4.7kW
Optional Protection Circuit
Add a blocking diode to Vout
if current can flow back-
wards into the output, as this
can damage the converter
when it is powered down.
The diode can either be fitted
across the device if the
source is low impedance or
fitted in series with the out-
put (recommended).
Optional Protection 1:
+Vin
R-78A(A)xx
-xxxSMD
CTRL
GND
Optional Protection 2:
+Vout
+Vin
CTRL
GND
GND
R-78A(A)xx
-xxxSMD
+Vout
Diode
Trim output voltage
up 1 diode drop
GND
+Vin
Application example:
Driving a high capacitive load
GND
R-78xx-xx
+Vout
6800µF
GND
www.recom-power.com
REV: 1/2015
I-17