The R-78E series is a switching regulator module that has been designed to offer all the advantages of a
switching regulator (high efficiency, wide input range, accurate output voltage regulation) but with a low
cost for production quantities. Due to the R-78E’s high efficiency of up to 95% no heat-sink is required.
The compact TO-220 compatible SIP3 package measures only 11.6 x 8.5 x 10.4mm, so it saves
precious board space.
0.5 Amp
SIP3
Single Output
Selection Guide
Part
Number
R-78E3.3-0.5
R-78E5.0-0.5
R-78E9.0-0.5
R-78E12-0.5
R-78E15-0.5
Input
Output
Output
Efficiency
(1)
Max. Capacitive
Voltage Range
Voltage
Current
@ min Vin @max. Vin
Load
(2)
[VDC]
[VDC]
[A]
[%]
[%]
[µF]
6-28
3.3
0.5
75
88
220
7-28
5
0.5
82
92
220
12-28
9
0.5
89
94
220
15-28
12
0.5
92
95
220
18-28
15
0.5
93
95
220
Notes:
Note1: Efficiency is tested at nom. input voltage and full load
Note2: Max. Cap Load is tested by nominal input and full resistive load
Model Numbering
R-78E__-0.5
Output Voltage
Output Current
IEC60950-1 certified
EN60950-1 certified
Specifications
(measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
BASIC CHARACTERISTICS
Parameter
Input Voltage Range
Quiescent Current
Minimum Load
(3)
Internal Operating Frequency
Output Ripple and Noise
(4)
20MHz BW
3.3, 5, 9Vout
12, 15Vout
2%
570kHz
50mVp-p
70mVp-p
Condition
nom. Vin = 24VDC
Min.
6VDC
Typ.
24VDC
1.5mA
Max.
28VDC
Notes:
Note3: recommend to use with more than 2% load, if not, the ripple of the product may exceeds the
specification, but doesn’t affect the reliability of the product
Note4: Measurements are made with a 100nF MLCC across output (low ESR)
continued on next page
www.recom-power.com
REV.: 3/2018
I-1
R-78E-0.5
DC/DC Converter
Specifications
(measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
Efficiency vs Load
100
90
80
Series
R-78E5.0-0.5
Efficiency [%]
70
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
7Vin
12Vin
24Vin
28Vin
90
100
Output Load [%]
REGULATIONS
Parameter
Output Accuracy
Line Regulation
Load Regulation
low line to high line, full load
10% to 100% load
Condition
Value
±3.0% typ.
±0.5% typ.
±1.0% typ.
PROTECTIONS
Parameter
Short Circuit Protection (SCP)
Condition
Value
continuous, automatic recovery
ENVIRONMENTAL
Parameter
Operating Temperature Range
Maximum Case Temperature
Vibration
MTBF
according to MIL-HDBK-217F, G.B.
+25°C
+70°C
Condition
natural convection and with derating (see graph)
Value
-40°C to +85°C
100°C
10-55Hz, 2G, 30min along X,Y,Z
7976 x 10
3
hours
2182 x 10
3
hours
Derating Graph
100
90
80
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
85
Ambient Temperature [°C]
www.recom-power.com
REV.: 3/2018
I-2
R-78E-0.5
DC/DC Converter
Specifications
(measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
SAFETY AND CERTIFICATIONS
Certificate Type (Safety)
Information Technology Equipment, General Requirements for Safety
EAC
RoHs 2+
Series
Report / File Number
1603123
RU-AT.49.09571
Standard
IEC60950-1:2005, 2nd Edition + AM 2:2013
EN60950-1:2006 + AM2:2013
TP TC 004/2011
RoHS 2011/65/EU + AM2015/863
EMC Compliance
Electromagnetic compatibility of multimedia equipment -
Emission requirements
Condition
with external filter
Standard / Criterion
EN55032, Class B
EMC Filtering suggestion according to EN55032 Class A and B
L1
+V
IN
C1
C2
R-78E-0.5
+V
OUT
GND
GND
Level
Class A
Class B
C1
4.7µF MLCC
10µF MLCC
C2
-
10µF MLCC
L1
3.9µH
12µH
DIMENSIONS and PHYSICAL CHARACTERISTICS
Parameter
Material
Package Dimension (LxWxH)
Package Weight
Condition
case
potting
Value
non-conductive black plastic, (UL94 V-0)
silicone, (UL94 V-0)
11.6 x 8.5 x 10.4mm
2g typ.
Dimension Drawing (mm)
embossed logo
11.6
8.5
10.4
Marking
0.51
0.50
5.08
4.10
+0.10/-0.05
0.25
±0.05
Pin Connections
Pin #
1
2
3
Function
+Vin
GND
+Vout
3.21
Recommended Footprint
2.54
1 2 3
Bottom View
2.00
Top View
1 2 3
2.54
Tolerance: xx.x= ±0.50mm
xx.xx= ±0.25mm
www.recom-power.com
REV.: 3/2018
I-3
R-78E-0.5
DC/DC Converter
Specifications
(measured @ Ta= 25°C, full load, nominal input voltage and after warm-up)
INSTALLATION AND APPLICATION
Standard Application
+V
IN
Series
R-78Exx-0.5
10µF MLCC
(optional)
+V
OUT
C1
10µF MLCC
(optional)
C2
GND
GND
Notes:
Note5: The R-78Exx-0.5 can not be used as positive to negativ converter
PACKAGING INFORMATION
Parameter
Packaging Dimension (LxWxH)
Packaging Quantity
Storage Temperature Range
Type
tube
Value
520.0 x 11.2 x 18.2mm
42pcs
-55°C to +125°C
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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