Recom
Recom


R-78Axx-0.5SMD

SMD Single Output


R-78Axx-0.5SMD Datasheet PDF
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Features
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
Very Low Shutdown Current
See Positive-to Negative Converter
Application Note for use as a voltage
inverter (alternative to LM79xx Linear)
INNOLINE
DC/DC-Converter
R-78Axx-
0.5SMD
Series
0.5 AMP
SMD
Single Output
Selection Guide
Part
Number
SMD
R-78A1.5-0.5SMD
Input
Range (1)
(V)
4.75 – 30
R-78A1.8-0.5SMD 4.75 – 34
R-78A2.5-0.5SMD 4.75 – 34
R-78A3.3-0.5SMD 4.75 – 34
R-78A5.0-0.5SMD 6.5 – 34
R-78A6.5-0.5SMD 8.0 – 34
R-78A9.0-0.5SMD 11 – 34
R-78A12-0.5SMD 15 – 34
R-78A15-0.5SMD 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
Note 1:1.5V Output can be unstable with Vin>30VDC
Output
Current
(A)
0.5
Efficiency
Min. Vin Max. Vin
(%) (%)
73 63
0.5 82 71
0.5 87 77
0.5 91
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0.5 94
81
86
0.5 95 88
0.5 96 92
0.5 97 94
0.5 97 95
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
80
60
40 Safe Operating Area
20
0
-40
0
25 50
7585 100
71
Operating Temperature (°C)
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27-March-2007
143


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INNOLINE
DC/DC-Converter
R-78Axx-0.5 SMD
Series
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"
Conditions
See Table
See Table
All Series
All Series
All Series
Min.
4.75
1.5
0
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
Vin = min. to max. at 0% load
280
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
using MIL-HDBK 217F
Typ. Max.
34.0V
15V
500mA
2000mA
25mA
0.4W
Continuous, automatic recovery
±2 ±3%
0.2
0.1
0.7
0.25
±75V
20mVp-p
30mVp-p
±50%
0.4%
0.2%
1.0%
0.4%
±100mV
30mVp-p
40mVp-p
0.015%/°C
220µF
330 380kHz
5 7mA
20 35uA
1.2 1.6V
Ir=1.8uA typ.
+85°C
50ms
+100°C
+125°C
70°C / W
+160°C
2.7g
21098 x 10³ hours
4214 x 10³ hours
Standard Application Circuit
+Vin
On/Off
1,2 R-78Axx-0.5SMD 4,5
Cin 10 3,7,8,9
10µF
(Vin>28V)
6
R1
R2
-Vin
+Vout
-Vout
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.
Use input capacitor if Vin>28VDC.
144
27-March-2007
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INNOLINE
DC/DC-Converter
Characteristics
Efficiency
R-78Axx-0.5 SMD
Series
Ripple
100 Vo=12V,15 V
Vo=9V
VVoo==35.V3V
Vo=1.8V
Vo=1.5V
50
Vin (V)
10 20
Efficiency Vs Vin (Full Load)
30 34
50
25
Vin (V)
10
20
Ripple Vs Vin (full load)
Vo=15V
Vo=12V
Vo=9V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=1.5V
30 34
100 Vo=15V
Vo=12V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=1.5V
50
0.1 0.2 0.3 0.4 0.5
Output Current ( A )
Efficiency Vs Load ( Vin=Max )
0.6
50
Vo=12V
Vo=15V
25 VVoo==59VV
Vo=3.3V
Vo=1.8V
Vo=1.5V
0.1 0.2 0.3 0.4 0.5
Output Current ( A )
Ripple Vs Load ( Vin=24V )
0.6
100 Vo=12,15V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=1.5V
50
0.1 0.2 0.3 0.4 0.5
Output Current ( A )
Efficiency Vs Load ( Vin=Min )
0.6
25
20 Vo=15V
15 Vo=12V
Vo=1.8V
10 Vo=3.3, 9V
Vo=5V
5 Vo=1.5V
0.1 0.2 0.3 0.4 0.5
Output Current ( A )
Ripple Vs Load ( Vin=Min )
0.6
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27-March-2007
145


R-78Axx-0.5SMD Datasheet PDF
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INNOLINE
DC/DC-Converter
Application Examples
R-78Axx-0.5 SMD
Series
Flash Memory Program Voltage Switcher
+Vin R-78A12-0.5SMD
D1
0V
Program
C1
220kW
D2
D1, D2: schottky Diode
"Program" = 0V, Pgm Pin = +5V
"Program" = high, Pgm Pin = +12,6V
Pgm
20kW
Reprogrammable
Flash Memory
0V
Output protection from external voltage
+Vin R-78A5.0-0.5SMD
On/Off
-Vin
68kW
Converter Output set to 5.7V to compensate for diode drop
Vout =
5.0V
Com
DC/DC Converter ( 1:1 )
+Vin
-Vin
- High isolation voltage
- Improved loading / line regulation
- Wide Input Voltage Range
- Point-of-Load Architecture
- Remote On/Off Control
R-78Axx-0.5SMD
+Vout
C1
C2
On/Off
C1: Required (further decoupling filtering may be
necessary between the two converters), C2: Optional
-Vout
146
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R-78Axx-0.5SMD Datasheet PDF
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INNOLINE
DC/DC-Converter
R-78Axx-0.5 SMD
Series
Table 1: Adjustment Resistor Values
0.5Adc
R-78A1.8
-0.5SMD
R-78A2.5
-0.5SMD
Vout (nom.)
1.8Vdc
2.5Vdc
R-78A3.3
-0.5SMD
3.3Vdc
R-78A5.0
-0.5SMD
5.0Vdc
R-78A6.R5-78A91.20
-0.5SMD
-0.5SMD
6.5Vdc
9.0Vdc
-0.5SMD
12.0Vdc
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)
R1 R2
3K
12K
4.7K
2.7K
R1 R2
R1 R2
R1 R2
R1 R2
R1 R2
R1 R2
200
12K
21K
5.6K
50K88.4K
17K
29K
27K
6.7K
19.4K
69K42K
14K
14k
30.5K58K
23K
8k
12.1k180K
49K
26K
17K
7.6k850K
77k
36K
24K
6.8k
86k
39K
26K
6.2k
540k97K
42K
28K
4k
71k160K
56K
36K
20.2k
112K
63K
7.2k
26K400K
125K
11.3K
200K
5.2K
59K345K
1.8K
18.5K740K
5.2K
830K
216K
Package Style and Pinning (mm)
SMD 10Pin Package
15.24
14.84
7.05 9.00
9.30
9.00
1.65 2.54x4
0.55
Bottom View
2.54 1.20
8.60
10.00
11.80
Recommended Footprint Details
10 9 8 7 6
13.00 Top View
12 34 5
1.20 1.80
3rd angle
projection
10 9 8 7 6
RECOM
R-78Axx-0.5SMD
xxxx
12345
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
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27-March-2007
147




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