(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
BASIC CHARACTERISTICS
Parameter
Input Voltage Range
Input Current
Quiescent Current
Minimum Load
(2)
ON/OFF CTRL
Standby Current
Internal Operating Frequency
Output Ripple and Noise
20MHz BW
Notes:
Note2: Operation at no load will not harm the converter, but specifications may not be met
max. Vin= 5VDC
DC-DC OFF
Series
Condition
nom. Vin= 12VDC and 24VDC
Min.
5VDC
Typ.
Max.
36VDC
500mA
5mA
10%
DC-DC ON
DC-DC OFF
3.5µA
650kHz
100mVp-p
Open or >1.75VDC
GND or <0.7VDC
6.5µA
ROF-78E3.3-0.5SMD
Efficiency vs. Load
100
90
80
100
90
80
70
Ripple vs. Load
5Vin
12Vin
24Vin
36Vin
Efficiency [%]
70
60
50
40
30
20
10
0
0
10
20
5Vin
12Vin
24Vin
36Vin
30
40
50
60
70
80
90
100
Ripple [mV]
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
Output Load [%]
Output Load [%]
ROF-78E5.0-0.5SMD
Efficiency vs. Load
100
90
80
100
90
80
70
Ripple vs. Load
9Vin
12Vin
24Vin
36Vin
Efficiency [%]
70
Ripple [mV]
9Vin
12Vin
24Vin
36Vin
0
10
20
30
40
50
60
70
80
90
100
60
50
40
30
20
10
0
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
Output Load [%]
www.recom-power.com
REV.: 3/2018
Output Load [%]
I-2
ROF-78E
DC/DC Converter
Specifications
(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
REGULATIONS
Parameter
Output Accuracy
Line Regulation
Load Regulation
Transient Response
low line to high line
10% to 100% load
100% to 50% load
100% to 10% load
Series
Condition
Value
±5.0% max.
±1.0% max.
± 3.0% typ.
±100mV
±200mV
PROTECTIONS
Parameter
Short Circuit Protection (SCP)
Short Circuit Input Current
Over Current Protection (OCP)
Condition
Value
automatic recovery
200mA max.
>950mA typ. Hiccup mode
+V
OUT
Optional Diode Protection Circuit
Optional Protection 1:
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).
ROF-78Exx-
5.0SMD
Optional Protection 2:
GND
+V
IN
GND
+V
out
=
+V
out
- V
sd
forward
+V
IN
ROF-78Exx-
5.0SMD
+V
OUT
+V
IN
ROF-78Exx-
5.0SMD
GND
GND
+V
out
=
+V
out
- V
sd
forward
GND
GND
+V
IN
ROF-78Exx-
5.0SMD
ENVIRONMENTAL
Parameter
Operating Temperature Range
Operating Humidity
MTBF
GND
GND
Condition
with derating @ free air convection (see graph)
non-condensing
according to MIL-HDBK-217F, G.B.
100
90
80
Value
-40°C to +85°C
5% - 95% RH max.
+25°C
3500 x 10
3
hours
Derating Graph
(@ free air convection)
Output Load [%]
70
60
50
40
30
20
10
0
-40 -30 -20 -10
0 10 20 30 40 50 60 70 80 90 100
75 85
Ambient Temperature [°C]
www.recom-power.com
REV.: 3/2018
I-3
ROF-78E
DC/DC Converter
Specifications
(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
SAFETY AND CERTIFICATIONS
Certificate Type (Safety)
RoHs 2+
EAC
RU-AT.49.09571
Series
Report / File Number
Standard
RoHS-2011/65/EU + AM-2015/863
TP TC 004/2011
EMC Compliance
Information technology equipment - Radio disturbance
characteristics - Limits and methods of measurement
Condition
with external filter
Standard / Criterion
EN55032, Class B
EMC Filtering Suggestion according to EN55032 Class A and Class B
L1
+V
IN
C1
C2
ROF-78Exx-
0.5SMD
Component List Class A and B
+V
OUT
C1
1µF
C2
1µF
L1
33µH
The capacitors used are ceramic capacitors, rated voltage 50V
GND
GND
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter
Material
Package Dimension (LxWxH)
Package Weight
Type
PCB
Value
FR4, (UL94 V-0)
12.5 x 13.5 x 4.0mm
1g typ.
Dimension Drawing (mm)
12.5
Pin 2
13.5
Recommended Footprint Details
4
1
3
0.25
2.0
2.50
2.50
Pin Connections
Pin #
Single
1
+Vin
2
GND
3
+Vout
4
CTRL
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
4.0
1
4
0.25
2
3
Bottom View
Top View
2
www.recom-power.com
REV.: 3/2018
I-4
ROF-78E
DC/DC Converter
Specifications
(measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
INSTALLATION AND APPLICATION
Standard Application Circuit
+V
IN
CTRL
Series
ROF-78Exx-
0.5SMD
+V
OUT
GND
GND
Application Examples
High Efficiency, Isolated, Dual Unregulated Output
+V
IN
+V
IN
CTRL
GND
GND
ROF-78Exx-
0.5SMD
ROF-78Exx-
0.5SMD
DC/DC Converter (1:1)
DC/DC Converter (1:1)
+V
out
+V
out
Com
Com
GND
GND
- Isolated dual output
- Wide Input Range
- Isolated dual output
- Wide Input Range
C1
C1
CTRL
Isolated (up to 6kVDC), Wide Input Range Regulated Output
+V
IN
+V
IN
+24V
REC5/4812DRWZ/H6/A/SMD
REC5/4812DRWZ/H6/A/SMD
C1
C1
R1
R1
R2
R2
ROF-78Exx-
0.5SMD
ROF-78Exx-
CTRL
0.5SMD
CTRL
C3
C3
Power Sequencing
Power Sequencing
24V
24V
3.3V
t
3.3V
t
+24V
+3.3V
C2
C2
+3.3V
GND
GND
- High isolation voltage
- Improved loading / line regulation
- Wide isolation voltage
- High input voltage range
- Improved loading / line regulation
- Point-of-load architecture
- Wide input voltage range
- Point-of-load architecture
GND
GND
V
V
PACKAGING INFORMATION
Parameter
Packaging Dimension (LxWxH)
Packaging Quantity
Tape Width
Storage Temperature Range
Storage Humidity
Type
tape and reel (carton)
tape and reel
Value
355.0 x 342.0 x 36.0mm
500pcs
24mm
-55°C to +125°C
95% RH max.
The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The
products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause
loss of life, inflict bodily harm or damage property. The applicant 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.
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