REV: 1/2014
INNOLINE
DC/DC-Converter
with 3 year Warranty
ROF-78E
I-37
Non Isolated
Power Module
●Low Profile 4.5mm
●Low Cost
●Wide Input Range (5V - 36V)
●Short Circuit Protection
●Castellated Connections
Features
Selection Guide
Part Input Output Output Efficiency
Number Range Voltage Current
(VDC) (VDC) (mA) (%)
ROF-78E3.3-0.5SMD* 5 - 36 3.3 500 73 - 84
ROF-78E5.0-0.5SMD* 9 - 36 5.0 500 79 - 87
* add Suffix „-R“ for tape & reel packing - e.g. ROF78Exx-0.5SMD-R
RoHS
2011/65/EU
6/6
Input Voltage Range 5 - 36 VDC (12/24V typ)
No Load Input Current 5mA max.
Maximum Input Current 0.5A max.
Short Circuit Input Current 200mA max.
Voltage Accuracy ±5% max.
Line Regulation (LL to HL at Full Load) ±1% max.
Load Regulation (10 ~ 100%) ±3% max.
Minimum Load* 10%
Ripple & Noise (20MHz Limited) 100mV max.
Transient Response 100% ~ 50% Load ±100mV
(20MHz Limited) 100% ~ 10% Load ±200mV
Operating Frequency 650KHz typ.
ON/OFF Enable Pin ON: Open or >1.75V
(max. Input Voltage = 5V) OFF: GND or <0.7V
Current Limit 950mA typ.
Short Circuit Protection Auto Recovery
Operating Temperature -40°C ~ 85°C
Storage Temperature -55°C ~ 125°C
Humidity 95% RH
DImension (L x W x H) 12.5 x 13.5 x 4.5 mm
Weight 1g
Cooling Method Free Air Convection
MTBF (25°C) MIL-HDBK-217F 3500 x 10³ hours
*Operation at no load will not damage these devices, but they may not meet all of the datasheet specifications.
Specifications (measured at Ta=25°C, Full Load after Warm-Up)
Derating-Graph
(Ambient Temperature)
www.recom-international.com
Output Power (%)
100
Operating Temperature (°C)
50
40
30
20
10
60
70
80
90
20 40 60 80 100
(Ambient Temperature Vin=24V)
110
75 85
Refer to Application Notes
www.recom-power.comI-38 REV: 1/2014
Characteristics
Applications
INNOLINE
DC/DC-Converter
ROF-78Exx-0.5SMD
Series
ROF-78E
ROF-78E3.3-0.5SMD
ROF-78E3.3-0.5SMD
Efficiency
Ripple
Standard Application Circuit
ROF-78E5.0-0.5SMD
ROF-78E5.0-0.5SMD
Efficiency (%)
100
400
Load (%)
36V
24V
12V
5V
50
60 80
0
10
20
30
40
60
70
80
90
20 100
Efficiency (%)
100
Load (%)
50
40
30
20
10
60
70
80
90
20 40 60 80 1000
0
9V
12V
24V
36V
Ripple (mV)
100
400
Load (%)
36V
24V
12V
5V
50
60 80
0
10
20
30
40
60
70
80
90
20 100
Ripple (mV)
100
Load (%)
50
40
30
20
10
60
70
80
90
20 40 60 80 1000
0
9V
12V
24V
36V
+Vo
-Vo
+Vin
-Vin
ROF-78Exx-
0.5SMD
Enable Pin
ROF-78E3.3-
0.5SMD
REC5-4812DRWZ/H6/A/SMD
+Vin
-Vin
+3.3V
-Vo
C1 C2
*High Isolated voltage
*Improved loading / line regulation
*Wide Input voltage range
*Point-of-Load Architecture
+24V
R1
R2
C3
EN
V
t
Power Sequencing
24V
3.3V
ROF-78E
www.recom-international.com I-39REV: 1/2014
Applications
INNOLINE
DC/DC-Converter
ROF-78Exx-0.5SMD
Series
Application Examples
Isolated (Up to 6KV), wide input range regulated output
High efficiency, isolated, dual unregulated outputs
Optional Protection Circuit
ROF-78EXX-
0.5SMD
DC/DC Converter (1:1)
C1
+Vo
COM
-Vo
+Vin
-Vin
*Isolated dual output
*Wide Input Range
Enable
ROF-78E
www.recom-power.comI-40 REV: 1/2014
Package Style and Pinning (mm)
21
43
13.50
12.50
2.00
2.00
0.25
0.25
2.50
2.50
1.00
3.5
TOP VIEW
BOTTOM VIEW
Recommended Footprint Details
XX.X ± 0.5 mm
XX.XX ± 0.25 mm
Pin Connections
Pin # Out
1 +Vin
2 GND
3 +Vout
4EN
ROF-78EXX-
0.5SMD +Vo
-Vo
C2 = 1uF
C1 = 1uF
+Vin
-Vin
Ls = 33uH
Applications
INNOLINE
DC/DC-Converter
ROF-78Exx-0.5SMD
Series
Conduction / Radiation Emission Filter Suggestion
Suggestion for conduction Emission Class A, meet radiation emission Class B
ROF-78EXX-0.5SMD
Surface Mount Package
The capacitors used are ceramic capacitors, rated voltage 50V
The product information and specifications are subject to change without prior notice. All products are designed for non-safety critical commercial and industrial applications.
The Buyer agrees to implement safeguards that anticipate the consequences of any failures that might cause harm, loss of life and/or damage property.