R-7xxxx-1.0 Datasheet PDF
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Features
Efficiency up to 94%, non-isolated,
no need for heatsinks!
Pin-out compatible with LM78XX Linears
Very low profile (L*W*H=11.5*7.5*10.2mm)
Wide input range (4.75V ~ 18V)
Short circuit protection, thermal shutdown
UL94V-0 Package Material
Non standard outputs available as specials
between 1.5V ~5.5V
Low ripple and noise
Selection Guide
Part
Number
SIP3
R-781.8-1.0
R-782.5-1.0
R-783.3-1.0
R-785.0-1.0
Input
Range
(V)
4.75 – 18
4.75 – 18
4.75 – 18
6.5 – 18
Output
Voltage
(V)
1.8
2.5
3.3
5.0
Output
Current
(A)
1.0
1.0
1.0
1.0
Efficiency
Min. Vin Max. Vin
(%) (%)
82 76
87 81
90 84
94 89
Description
The R-78xx-1.0 series high efficiency switching regulators are ideally suited to replace 1 Amp 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 10mA round off the specifications of this
versatile converter series.
Specifications ( typical at 25°C, 10% minimum load, unless otherwise specified )
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Characteristics
Conditions
Min. Typ. Max.
Input Voltage Range
All Series
4.75
18V
Output Voltage Range
All Series
1.5
5.5V
Output Current
All Series
0
1000mA
Output Current Limit
All Series
3000mA
Short Circuit Input Current
All Series
10 30mA
Internal Power Dissipation
0.4W
Short Circuit Protection
Continuous, automatic recovery
Output Voltage Accuracy (At 100% Load) All Series
±2 ±3%
Line Regulation (100% Load, Vin max.) All Series
0.2 0.4%
Load Regulation (10 to 100% full load) All Series
0.4 0.6%
Dynamic Load Stability
100% <-> 50% load
±85mV ±100mV
Ripple & Noise (20Mhz BW)
All Series
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
Operating Temperature Range
-40°C
+85°C
Operating Case Temperature (with derating)
+100°C
Storage Temperature Range
-55°C
+125°C
Case Thermal Impendance
70°C/W
Thermal Shutdown
Internal IC junction
+160°C
Package Weight
1.9g
}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
148 27-March-2007
INNOLINE
DC/DC-Converter
R-78xx-1.0
Series
1.0 AMP
SIP3
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)
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R-7xxxx-1.0 Datasheet PDF
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INNOLINE
DC/DC-Converter
Standard Application Circuit
+Vin
R-78xx-1.0
-Vin
Characteristics
Efficiency
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
R-78xx-1.0
Series
+Vout
-Vout
Add a blocking diode to
Vout if current can flow
backwards into the out-
put, as this can damage
the converter..
Ripple
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
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
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27-March-2007
149


R-7xxxx-1.0 Datasheet PDF
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INNOLINE
DC/DC-Converter
Application Examples
High efficiency, isolated, dual regulated outputs
+Vin R-785.0-1.0
R-78xx-1.0
Series
REC3-0515DRW/H4
+15VDC
Com
C1 C2
-15VDC
- Medical Grade Isolated Dual Outputs
-Vin
C1: Optional , C2 : Required (further decoupling filtering - Wide input range 6.5V to 18V
may be necessary between the two converters)
- High Efficiency, Suitable for 12V Battery Powered Devices
Isolated (up to 6KV), wide Input range regulated output
DC/DC Converter ( 1:1 )
+Vin
-Vin
- High isolation voltage
- Improved loading / line regulation
- Wide Input Voltage Range
- Point-of-Load Architecture
R-78xx-1.0
+Vout
C1
C2
-Vout
C1: Required (further decoupling filtering may be
necessary between the two converters), C2: Optional
Package Style and Pinning (mm)
SIP3 PIN Package
RECOM
10.2
R-785.0-1.0
**** Pb
0.51 typ.
4.10 0.7 typ.
11.50
0.25 Bottom View
2.0
3.21 5.08
7.55
Recommended Footprint Details
1.00ø+0.15/–0
2.54
Top View
2.54
3rd angle
projection
RECOM
R-785.0-1.0
**** Pb
123
Pin Connections
Pin #
1
2
3
xx.x ±0.5mm
xx.xx ±0.25mm
+Vin
GND
+Vout
150
27-March-2007
www.recom-international.com



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