Datasheet
www.recom-power.com
REV.: 5/2019 I-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78xx-0.5
Series
PROTECTIONS
Parameter Condition Value
Short Circuit Protection (SCP) continuous, automatic recovery
Short Circuit Input Current nom. Vin= 24VDC 60mA max.
Optional Diode Protection Circuit
Optional Protection 1: Optional Protection 2:
REGULATIONS
Parameter Condition Value
Output Accuracy 100% load ±2.0% typ / ±3.0% max.
Line Regulation low line to high line, 100% load
1.5V - 6.5V
9V - 15.5V
±0.2% typ. / ±0.4% max.
±0.1% typ. / ±0.2% max.
Load Regulation 10% to 100% load
1.5V - 6.5V
9V - 15.5V
±0.4% typ. / ±0.6% max.
±0.25% typ. / ±0.4% max.
Transient Response
(5)
100% <-> 50% load
100% <-> 10% load
±75mV typ.
±100mV max.
+V
in
+V
out
GNDGND
+V
in
+V
out
=
+V
out
- 0.3V
R-78xx-0.5
GND
+V
out
+V
in
GNDGND
R-78xx-0.5
GND
+V
out
+V
in
+V
in
+V
out
GNDGND
+V
in
+V
out
=
+V
out
- 0.3V
R-78xx-0.5
GND
+V
out
+V
in
GNDGND
R-78xx-0.5
GND
+V
out
+V
in
C1 C2
C1, C2: optional
C1, C2: optional
C1
- Isolated dual outputs
- Wide input range 4.75V to 34V
- High isolation voltage
- Improved load / line Regulation
- Wide input voltage
- Point-of-load architecture
C2
6800µF
+V
in
+V
out
GND
+V
out
-V
out
Com
+V
out
GND
GND
+V
in
GND
+V
in
GND
R-78xx-0.5
GND
+V
out
+V
in
R-78xx-0.5
GND
+V
out
+V
in
R-78xx-0.5
GND
+V
out
+V
in
DC/DC Converter (1:1)
DC/DC Converter (1:1)
Application example:
Driving a high capacitive load
Add a blocking diode to Vout if
current can flow backwards 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 output (recommended).
Notes:
Note5: The R.783.3-0.5 requires Vin>5.5V to meet the Transient Response specifications
Efficiency vs. Load (min. Vin)
Ripple vs. Load (min. Vin)
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
15, 12Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90 100
50
40
30
20
45
35
25
15
10
5
0
Ripple [mV]
Output Load [%]
15Vout
12Vout
9, 3.3Vout
5Vout
1.8Vout
1.5Vout