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● Efficiency up to 97%,Non isolated,  
no need for heatsinks  
INNOLINE  
Features  
DC/DC-Converter  
● Pin-out compatible with LM78XX Linears  
● Very low profile( L*W*H=11.5*7.5*10.2 )  
● Wide input range.(4.75V ~ 34V)  
● Short circuit protection, Thermal shutdown  
● Non standard outputs available as specials  
between 1.5V ~15.5V  
R-78xx-0.5  
Series  
● Low ripple and noise  
0.5 AMP  
SIP3  
Single Output  
Selection Guide  
Part  
Number  
SIP3  
Input  
Range (1)  
(V)  
Output  
Voltage  
(V)  
Output  
Current  
(A)  
Efficiency  
Min. Vin  
Max. Vin  
(%)  
(%)  
R-781.5-0.5  
R-781.8-0.5  
R-782.5-0.5  
R-783.3-0.5  
R-785.0-0.5  
R-786.5-0.5  
R-789.0-0.5  
R-7812-0.5  
R-7815-0.5  
4.75 – 30  
4.75 – 34  
4.75 – 34  
4.75 – 34  
6.5 – 34  
8.0 – 34  
11 – 34  
1.5  
1.8  
2.5  
3.3  
5.0  
6.5  
9.0  
12  
0.5  
0.5  
0.5  
0.5  
0.5  
0.5  
0.5  
0.5  
0.5  
73  
63  
71  
77  
81  
86  
88  
92  
94  
95  
82  
87  
91  
94  
95  
96  
97  
97  
15 – 34  
18 – 34  
15  
Note 1:1.5V Output can be unstable with Vin>30VDC  
Description  
Derating-Graph  
(Ambient Temperature)  
The R-78xx-Series high efficiency switching regulators are ideally suited to replace 78xx linear regulators  
and are pin compatible. The efficiency of up to 97% means that very little energy is wasted as heat so there  
is no need for any heat sinks with their additional space and mounting costs. Low ripple and noise figures  
and a short circuit input current of typically only 7mA round off the specifications of this versatile converter  
series.  
120  
100  
80  
This R-78xx-0.5 is fully certified to EN 60601-1-2 (Medical Equipment), EN 55022 (Emissions), and  
EN55024 (Immunity) EMC Standards.  
60  
40  
Safe Operating Area  
20  
0
85  
-40  
0
25  
50  
75  
71  
100  
Operating Temperature (°C)  
146  
March-2006  
www.recom-international.com  
INNOLINE  
R-78xx-0.5  
Series  
DC/DC-Converter  
Specifications (refer to the standard application circuit, Ta: 25°C)  
Characteristics  
Input Voltage Range  
Conditions  
1.5V  
1.8V to 15.5V  
Min.  
4.75  
4.75  
Typ.  
Max.  
30.0V  
34.0V  
Output Voltage Range (for customized parts)  
Output Current  
All Series  
All Series  
All Series  
All Series  
1.25  
50  
15.5V  
500mA  
2000mA  
30mA  
Output Current Limit  
Short Circuit Input Current  
Internal Power Dissipation  
Short Circuit Protection  
10  
0.4W  
Continuous, automatic recovery  
Output Voltage Accuracy (At 100% Load)  
Line Voltage Regulation (Vin = min. to max. at full load)  
All Series  
1.5V to 6.5V  
9V to 15.5V  
2
0.2  
0.1  
3%  
0.4%  
0.2%  
0.6%  
0.4%  
Load Regulation (10 to 100% full load)  
Dynamic Load Stability  
1.5V to 6.5V  
9V to 15.5V  
100% <-> 50% load  
100% <-> 10% load  
1.5V to 6.5V  
9V to 15.5V  
0.4  
0.25  
75mV  
100mV  
30mVp-p  
40mVp-p  
20mVp-p  
35mVp-p  
Ripple & Noise (without Output Capacitor)  
Ripple & Noise (with Output Capacitor=100µF)  
20mVp-p  
30mVp-p  
15mVp-p  
25mVp-p  
1.5V to 6.5V  
9V to 15.5V  
Temperature Coefficient  
Max capacitance Load  
Switching Frequency  
-40°C ~ +85°C ambient  
0.015%/°C  
220µF  
280  
330  
5
380kHz  
7mA  
Quiescent Current  
Vin = min. to max. at 0% load  
Operating Temperature Range  
Operating Case Temperature  
Storage Temperature Range  
Case Thermal Impendance  
Thermal Shutdown  
-40°C  
-55°C  
+85°C  
+100°C  
+125°C  
70°C / W  
Internal IC junction  
+160°C  
MTBF (+25°C)  
using MIL-HDBK 217F  
using MIL-HDBK 217F  
21098 x 10³ hours  
4212 x 10³ hours  
Detailed Information see  
Application Notes chapter "MTBF"  
}
.
(+71°C)  
Standard Application Circuit  
+Vout  
+Vin  
R-78xx-0.5  
C1  
ON  
C2  
47µF  
100µF  
(Optional)  
OFF  
1ms  
-Vin  
-Vout  
To protect the converter during power-up, use soft start Vin and C1=47µF  
www.recom-international.com  
March-2006  
147  
INNOLINE  
R-78xx-0.5  
Series  
DC/DC-Converter  
Characteristics  
Ripple  
Efficiency  
100  
50  
Vo=12V,15 V  
Vo=9V  
50  
25  
Vo=5V  
Vo=3.3V  
Vo=1.8V  
Vo=1.5V  
Vo=12V  
Vo=15V  
Vo=9V  
Vo=5V  
Vo=3.3V  
Vo=1.8V  
Vo=1.5V  
10  
Efficiency Vs Vin (Full Load)  
20  
30 34  
Vin (V)  
10  
Vin (V)  
30 34  
20  
Ripple Vs Vin (full load)  
100  
50  
50  
25  
Vo=15V  
Vo=12V  
Vo=5V  
Vo=3.3V  
Vo=1.8V  
Vo=1.5V  
Vo=12V  
Vo=15V  
Vo=9V  
Vo=5V  
Vo=3.3V  
Vo=1.8V  
Vo=1.5V  
0.1  
0.2  
Output Current ( A )  
Efficiency Vs Load ( Vin=Max )  
0.3  
0.4  
0.5  
0.6  
0.4  
0.1  
0.2  
0.3  
0.5  
0.6  
Output Current ( A )  
Ripple Vs Load ( Vin=24V )  
50  
25  
100  
50  
Vo=12V,15V  
Vo=5V  
Vo=3.3V  
Vo=1.8V  
Vo=1.5V  
Vo=15V  
Vo=12V  
Vo=1.8V  
Vo=3.3, 9V  
Vo=5V  
Vo=1.5V  
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
Output Current ( A )  
Output Current ( A )  
Ripple Vs Load ( Vin=Min )  
Efficiency Vs Load ( Vin=Min )  
148  
March-2006  
www.recom-international.com  
INNOLINE  
R-78xx-0.5  
Series  
DC/DC-Converter  
Application Examples  
High efficiency, isolated, dual unregulated outputs  
DC/DC Converter ( 1:1 )  
+Vout  
Com  
+Vin  
R-78xx-0.5  
-Vout  
C1  
C2  
- Isolated dual outputs  
-Vin  
- Wide input range 4.75V to 34V  
C1 , C2 : optional  
Isolated (up to 6KV), wide Input range regulated output  
DC/DC Converter ( 1:1 )  
+Vin  
+Vout  
R-78xx-0.5  
C1  
-Vin  
C2  
- High isolation voltage  
- Improved loading / line regulation  
- Wide Input Voltage Range  
- Point-of-Load Architecture  
-Vout  
C1 , C2 : optional  
Package Style and Pinning (mm)  
SIP3 PIN Package  
3rd angle  
projection  
7.55  
RECOM  
R-785.0-0.5  
**** Pb  
RECOM  
R-785.0-0.5  
10.2  
0.51 typ.  
**** Pb  
1
2 3  
0.7 typ.  
4.10  
Recommended Footprint Details  
Pin Connections  
ø
1.00 +0.15/–0  
Pin #  
11.50  
1
2
3
+Vin  
GND  
2.54  
0.25  
Bottom View  
2.0  
+Vout  
Top View  
2.54  
xx.x 0.5mm  
xx.xx 0.25mm  
3.21  
5.08  
www.recom-international.com  
March-2006  
149