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Recom
Recom


R-78A1.8-1.0SMD

SMD Single Output


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R-78A1.8-1.0SMD pdf
Features
Efficiency up to 94%,Non isolated,
no need for heatsinks
SMD Package (UL94V-0 Material )
Adjustable Output Voltage
Wide input range.(4.75V ~ 18V)
Short circuit protection, Thermal shutdown
Remote On/Off Control
Very Low Shutdown Current
Selection Guide
Part
Number
SMD
R-78A1.8-1.0SMD
Input
Range (1)
(V)
4.75 – 18
Output
Voltage
(V)
1.8
Adjust
Range
(V)
1.5~3.3
Output
Current
(A)
1.0
Efficiency
Min. Vin Max. Vin
(%) (%)
82 71
R-78A2.5-1.0SMD 4.75 – 18
2.5 1.5~4.5
1.0
87 77
R-78A3.3-1.0SMD 4.75 – 18
3.3 1.8~5.5
1.0
91 81
R-78A5.0-1.0SMD 6.5 – 18
5.0 2.5~5.5
1.0
94 86
Description
The R-78Axx-1.0SMD series high efficiency switching regulators are ideally suited to pick-and-place mass
production. The efficiency of up to 94% means that very little energy is wasted as heat. remote on/off control
and adjustable output voltage are useful additional features of this versatile SMD converter series.
Specifications ( typical at 25°C, 10% minimum load, unless otherwise specified )
Characteristics
Conditions
Min. Typ. Max.
Input Voltage Range (Note 1)
See Table
4.75
18.0V
Output Voltage Range
See Table
1.5
5.5V
Output Current
All Series
0
1000mA
Output Current Limit
Short Circuit Input Current
All Series
All Series
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3000mA
30mA
Internal Power Dissipation
0.4W
Short Circuit Protection
Continuous, automatic recovery
Output Voltage Accuracy (At 100% Load) All Series
±2 ±3%
Adjustable Voltage Range
See Table 1
±50%
Line Voltage Regulation (Vin = min to max at full load)
0.2 0.4%
Load Regulation (10% to 100% full load)
0.7 1.0%
Dynamic Load Stability
100%<>50% load
±85mV ±100mV
Ripple & Noise (20MHz BW)
20mVp-p 30mVp-p
Temperature Coefficient
-40°C~+85°C ambient
0.015%/°C
Max capacitance Load
220µF
Switching Frequency
280 350 430kHz
Quiescent Current
Vin = min. to max. at 0% load
5 7mA
Shutdown Current
20 35µA
Remote On/Off Threshold Voltage
0.8 1.2 1.6V
ON/OFF Remote Control
ON: Open or 1.6<Vr<5V, OFF: GND or 0<Vr<1.6V Ir=1.8uA typ.
Operating Temperature Range
-40°C
+85°C
Switch On/Off Time
(using Remote On/Off Control)
50ms
Operating Case Temperature
+100°C
Storage Temperature Range
-55°C
+125°C
Case Thermal Impendance
70°C / W
Thermal Shutdown
Internal IC junction
+160°C
Package Weight
2.7g
}MTBF (+25°C) Detailed Information see
using MIL-HDBK 217F
. (+71°C) Application Notes chapter "MTBF" using MIL-HDBK 217F
13338 x 10³ hours
3880 x 10³ hours
www.recom-international.com
04-April-2007
INNOLINE
DC/DC-Converter
R-78Axx-
1.0SMD
Series
1.0 AMP
SMD
Single Output
Derating-Graph
(Ambient Temperature)
120
100
80
60
40
30
20
Safe Operating Area
0
-40 0
25 50
7585 100
60
Operating Temperature (°C)
151



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R-78A1.8-1.0SMD pdf
INNOLINE
DC/DC-Converter
Standard Application Circuit
+Vin
On/Off
-Vin
Characteristics
Efficiency
R-78Axx-1.0 SMD
Series
1,2 R-78Axx-1.0 SMD 4,5
10 3,7,8,9 6
R1
R2
+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.
Ripple
100
Vo=5V
Vo=3.3V
75
Vo=2.5V
Vo=1.8V
50
25
5 10
Vin ( V )
15
Efficiency Vs Vin (Full Load)
18
50
25 Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
5 10
Vin ( V )
Ripple Vs Vin ( Full Load )
15
18
100
Vo=5V
Vo=3.3V
75
Vo=2.5V
Vo=1.8V
50
25
0.2 0.4 0.6 0.8 1.0
Output Current ( A )
Efficiency Vs Load ( Vin=Max )
1.2
50
Vo=5V
25
Vo=3.3V
Vo=2.5V
Vo=1.8V
0.2 0.4 0.6 0.8 1.0
Output Current ( A )
Ripple Vs Load ( Vin=Max )
1.2
152
100 Vo=5V
Vo=3.3V
Vo=2.5V
75 Vo=1.8V
50
25
0.2 0.4 0.6 0.8 1.0
Output Current ( A )
Efficiency Vs Load ( Vin=Min )
1.2
50
25
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
0.2 0.4 0.6 0.8 1.0
Output Current ( A )
Ripple Vs Load ( Vin=Min )
1.2
04-April-2007
www.recom-international.com



Part Number R-78A1.8-1.0SMD
Description SMD Single Output
Maker Recom - Recom
Total Page 4 Pages
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R-78A1.8-1.0SMD pdf
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