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
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27-March-2007
143
INNOLINE
DC/DC-Converter
R-78Axx-0.5 SMD
Series
Conditions
See Table
See Table
All Series
All Series
All Series
Min.
4.75
1.5
0
Typ.
Max.
34.0V
15V
500mA
2000mA
25mA
0.4W
Continuous, automatic recovery
All Series
See Table 1
1.5V to 6.5V
9V to 15V
1.5V to 6.5V
9V to 15V
100% <-> 50% load
100% <-> 10% load
1.5V to 6.5V
9V to 15.5V
-40°C ~ +85°C ambient
280
Vin = min. to max. at 0% load
0.8
ON: Open or 1.6<Vr<5V, OFF: GND or 0<Vr<1.6V
-40°C
(using Remote On/Off Control)
-55°C
Internal IC junction
+160°C
2.7g
21098 x 10³ hours
4214 x 10³ hours
330
5
20
1.2
±2
0.2
0.1
0.7
0.25
±75V
20mVp-p
30mVp-p
±3%
±50%
0.4%
0.2%
1.0%
0.4%
±100mV
30mVp-p
40mVp-p
0.015%/°C
220µF
380kHz
7mA
35uA
1.6V
Ir=1.8uA typ.
+85°C
50ms
+100°C
+125°C
70°C / W
Specifications
( typical at 25°C, 10% minimum load, unless otherwise specified )
Characteristics
Input Voltage Range (Note 1)
Output Voltage Range
Output Current
Output Current Limit
Short Circuit Input Current
Internal Power Dissipation
Short Circuit Protection
Output Voltage Accuracy (At 100% Load)
Adjustable Voltage Range
Line Voltage Regulation (Vin = min. to max. at full load)
Load Regulation (10 to 100% full load)
Dynamic Load Stability
Ripple & Noise (without Output Capacitor)
Temperature Coefficient
Max capacitance Load
Switching Frequency
Quiescent Current
Shutdown Input Current
Remote On/Off Threshold Voltage
ON/OFF Remote Control
Operating Temperature Range (with derating)
Switch On/Off Time
Operating Case Temperature
Storage Temperature Range
Case Thermal Impendance
Thermal Shutdown
Package Weight
MTBF (+25°C)
.
(+71°C)
}
Detailed Information see
Application Notes chapter "MTBF"
using MIL-HDBK 217F
Standard Application Circuit
+Vin
Cin
1,2
4,5
+Vout
R1
R2
Add a blocking diode to
Vout if current can flow
backwards into the out-
put, as this can damage
the converter..
See Application
Examples for details.
R-78Axx-0.5SMD
6
On/Off
10µF
(Vin>28V)
10 3,7,8,9
-Vin
Use input capacitor if Vin>28VDC.
-Vout
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INNOLINE
Characteristics
DC/DC-Converter
R-78Axx-0.5 SMD
Series
Ripple
Vo=12V,15 V
Vo=9V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=1.5V
50
Vo=15V
Vo=12V
Vo=9V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=1.5V
Vin (V)
10
20
30 34
Efficiency
100
50
25
Efficiency (%)
Vin (V)
10
20
30 34
Efficiency Vs
Vin (Full Load)
Ripple (mV)
Ripple Vs
Vin (full load)
100
Vo=15V
Vo=12V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=1.5V
50
50
25
Efficiency (%)
0.1
0.2
0.3
0.4
0.5
0.6
Ripple (mV)
Vo=12V
Vo=15V
Vo=9V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=1.5V
0.1
0.2
0.3
0.4
0.5
0.6
Output Current ( A )
Output Current ( A )
Efficiency Vs
Load ( Vin=Max )
Ripple Vs
Load ( Vin=24V )
100
Vo=12,15V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=1.5V
25
20
15
10
Vo=15V
Vo=12V
Vo=1.8V
Vo=3.3, 9V
Vo=5V
Vo=1.5V
50
Efficiency (%)
Ripple (mV)
5
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 )
Efficiency Vs
Load ( Vin=Min )
Ripple Vs
Load ( Vin=Min )
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27-March-2007
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INNOLINE
Application Examples
DC/DC-Converter
R-78Axx-0.5 SMD
Series
Flash Memory Program Voltage Switcher
+Vin
R-78A12-0.5SMD
20kW
Pgm
D1
C1
220kW
0V
Program
Reprogrammable
Flash Memory
D2
D1, D2: schottky Diode
"Program" = 0V, Pgm Pin = +5V
"Program" = high, Pgm Pin = +12,6V
0V
Output protection from external voltage
+Vin
R-78A5.0-0.5SMD
Vout =
5.0V
On/Off
-Vin
68kW
Com
Converter Output set to 5.7V to compensate for diode drop
DC/DC Converter ( 1:1 )
+Vin
R-78Axx-0.5SMD
+Vout
-Vin
- High isolation voltage
- Improved loading / line regulation
- Wide Input Voltage Range
- Point-of-Load Architecture
- Remote On/Off Control
On/Off
C1
C2
-Vout
C1: Required (further decoupling filtering may be
necessary between the two converters), C2: Optional
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INNOLINE
DC/DC-Converter
Table 1: Adjustment Resistor Values
0.5Adc
Vout (nom.)
Vout (adj)
1.5 (V)
1.8 (V)
2.5 (V)
3.0 (V)
3.3 (V)
3.6 (V)
3.9 (V)
4.5 (V)
4.9 (V)
5.0 (V)
5.1 (V)
5.5 (V)
6.5 (V)
8.0 (V)
9.0 (V)
10 (V)
11 (V)
12 (V)
12.6 (V)
12KΩ
4.7KΩ
2.7KΩ
50KΩ
29KΩ
19.4KΩ
14kΩ
8kΩ
69KΩ
30.5KΩ
12.1kΩ
7.6kΩ
6.8kΩ
6.2kΩ
4kΩ
R-78A1.8
-0.5SMD
1.8Vdc
R1
3KΩ
R2
R-78A2.5
-0.5SMD
2.5Vdc
R1
200Ω
12KΩ
21KΩ
88.4KΩ
R2
R-78A3.3
-0.5SMD
3.3Vdc
R1
R2
R-78Axx-0.5 SMD
Series
R-78A5.0
-0.5SMD
5.0Vdc
R1
R2
R-78A6.5
R-78A12
R-78A9.0
-0.5SMD
-0.5SMD
6.5Vdc
R1
R2
9.0Vdc
R1
R2
-0.5SMD
12.0Vdc
R1
R2
5.6KΩ
17KΩ
27KΩ
42KΩ
58KΩ
180KΩ
850KΩ
6.7KΩ
14KΩ
23KΩ
49KΩ
77kΩ
86kΩ
540kΩ
71kΩ
20.2kΩ
7.2kΩ
26KΩ
11.3KΩ
5.2KΩ
1.8KΩ
59KΩ
97KΩ
160KΩ
26KΩ
36KΩ
39KΩ
42KΩ
56KΩ
112KΩ
400KΩ
17KΩ
24KΩ
26KΩ
28KΩ
36KΩ
63KΩ
125KΩ
200KΩ
345KΩ
18.5KΩ 740KΩ
5.2KΩ
830KΩ
216KΩ
Package Style and Pinning (mm)
SMD 10Pin Package
15.24
14.84
7.05
1.65
9.00
2.54x4
8.60
10.00
11.80
9.30
9.00
10 9 8 7 6
RECOM
R-78Axx-0.5SMD
xxxx
3rd angle
projection
1 2 3 4 5
Pin Connections
Pin #
1,2
+Vin
3,7,8,9
GND
4,5
+Vout
6
V adj
10
Remote On/Off
xx.x ±0.5mm
xx.xx ±0.25mm
Recommended Footprint Details
0.55
Bottom View
13.00
1.20
10 9 8 7 6
Top View
1 2 3 4 5
1.80
2.54
1.20
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