Datasheet

R-78AA-1.0
www.recom-international.com
I-17
REV:1/2010
Application Examples
INNOLINE
DC/DC-Converter
+Vin
-Vin
R-78A3.3-1.0SMD
Vout = 3.3V
or 5.0V @ 1A
Com
6.8kW
On/Off
3.3V/5V Selectable 1A Power Supply
3.3V/5V
Select
(TTL)
4.7k
W
R-78AAxx-1.0 SMD
Series
R-78Axx-1.0 SMD
-Vout
+Vout
+Vin
-Vin
1,2
10
3,7,8,9
6
4,5
R1
R2
On/Off
Standard Application Circuit
Optional Protection Circuit
R-78A(A)xx
-xxxSMD
-Vout
+Vout
+Vin
-Vin
Diode
Trim output voltage
up 1 diode drop
CTRL
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)
.
-Vout
+Vout
+Vin
-Vin
R-78A(A)xx
-xxxSMD
CTRL
Optional Protection 1:
Optional Protection 2:
R-78xx-xx
-Vout
+Vout
+Vin
-Vin
6800µF
Application example:
Driving a high capacitive load