Features
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Efficiency up to 97%,Non isolated,
no need for heatsinks
SMD Package
Adjustable Output Voltage
Wide input range.(4.75V ~ 34V)
Short circuit protection, Thermal shutdown
Remote On/Off Control
UL94V-0 Package Material
INNOLINE
DC/DC-Converter
Very Low Shutdown Current
See Positive-to Negative Converter
Application Note for use as a voltage
inverter (alternative to LM79xx Linear)
R-78Axx-
0.5SMD
Series
0.5 AMP
SMD
Single Output
Selection Guide
Part
Number
SMD
R-78A1.5-0.5SMD
R-78A1.8-0.5SMD
R-78A2.5-0.5SMD
R-78A3.3-0.5SMD
R-78A5.0-0.5SMD
R-78A6.5-0.5SMD
R-78A9.0-0.5SMD
R-78A12-0.5SMD
R-78A15-0.5SMD
Input
Range (1)
(V)
4.75 – 30
4.75 – 34
4.75 – 34
4.75 – 34
6.5 – 34
8.0 – 34
11 – 34
15 – 34
18 – 34
Output
Voltage
(V)
1.5
1.8
2.5
3.3
5.0
6.5
9.0
12
15
Adjust
Range
(V)
fixed
1.5~3.3
1.5~4.5
1.8~5.5
2.5~8.0
3.3~11.0
4.5~12.6
4.5~12.6
fixed
Output
Current
(A)
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
Efficiency
Min. Vin Max. Vin
(%)
(%)
73
82
87
91
94
95
96
97
97
63
71
77
81
86
88
92
94
95
Note 1:1.5V Output can be unstable with Vin>30VDC
Description
The R-78Axx-0.5SMD series high efficiency switching regulators are ideally suited to pick-and-place mass
production. The efficiency of up to 97% means that very little energy is wasted as heat. The additional featu-
res of remote on/off control and adjustable output voltages will find many uses in the Battery-powered,
Industrial, Medical and Automotive markets. Low ripple and noise figures and a shutdown input current of
typically only 20uA round off the specifications of this versatile SMD converter series.
Derating-Graph
(Ambient Temperature)
120
100
Output Power (%)
80
60
40
20
0
Safe Operating Area
-40
0
25
50
Operating Temperature (°C)
85
75
100
71
www.recom-international.com
27-March-2007
143
RECOM [ RECOM INTERNATIONAL POWER ]
