1.0 AMP
SIP3
Single Output
INNOLINE
DC/DC-Converter
R-78xx-1.0
Series
●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
Features
Selection Guide
Part Input Output Output Efficiency
Number Range Voltage Current Min. Vin Max. Vin
SIP3 (V) (V) (A) (%) (%)
R-781.8-1.0 4.75 – 18 1.8 1.0 82 76
R-782.5-1.0 4.75 – 18 2.5 1.0 87 81
R-783.3-1.0 4.75 – 18 3.3 1.0 90 84
R-785.0-1.0 6.5 – 18 5.0 1.0 94 89
Output Power (%)
120
100
20
60
100750
-40
Operating Temperature (°C)
0
80
5025 60
Safe Operating Area
85
40
30
Derating-Graph
(Ambient Temperature)
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) using MIL-HDBK 217F 13338 x 10³ hours
. (+71°C) using MIL-HDBK 217F 3880 x 10³ hours
Specifications ( typical at 25°C, 10% minimum load, unless otherwise specified )
}Detailed Information see
Application Notes chapter "MTBF"
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.
Description
27-March-2007 www.recom-international.com148
Efficiency (%)
50
5
Efficiency Vs
Vin (Full Load)
Vo=1.8V
Vo=2.5V
Vo=5V
Vo=3.3V
25
Vin ( V )
10 15 18
75
100
Efficiency
Efficiency (%)
100
0.2
Efficiency Vs
Load ( Vin=Max )
Vo=1.8V
Vo=3.3V
Vo=5V
Vo=2.5V
50
Output Current ( A )
0.4 0.6 0.8 1.0 1.2
75
25
Efficiency (%)
100
0.2
Efficiency Vs
Load ( Vin=Min )
Vo=1.8V
Vo=3.3V
Vo=5V
Vo=2.5V
50
Output Current ( A )
0.4 0.6 0.8 1.0 1.2
75
25
Ripple (mV)
50
5
Ripple Vs
Vin ( Full Load )
Vo=1.8V
Vo=2.5V
Vo=5V
Vo=3.3V
25
Vin ( V )
10 15 18
Ripple
Ripple (mV)
50
0.2
Ripple Vs
Load ( Vin=Max )
Vo=1.8V
Vo=2.5V
Vo=5V
Vo=3.3V
25
Output Current ( A )
0.4 0.6 0.8 1.0 1.2
Ripple (mV)
50
0.2
Ripple Vs
Load ( Vin=Min )
Vo=1.8V
Vo=2.5V
Vo=5V
Vo=3.3V
25
Output Current ( A )
0.4 0.6 0.8 1.0 1.2
R-78xx-1.0
Series
Standard Application Circuit
Characteristics
INNOLINE
DC/DC-Converter
Add a blocking diode to
Vout if current can flow
backwards into the out-
put, as this can damage
the converter..
27-March-2007 149www.recom-international.com
2.54
2.54
Top View
Bottom View
7.55
2.0
0.25
5.08
3.21
213
4.10
0.51 typ.
0.7 typ.
10.2
RECOM
R-785.0-1.0
**** Pb
1.00ø+0.15/0
11.50
RECOM
R-785.0-1.0
**** Pb
Application Examples
INNOLINE
DC/DC-Converter
Package Style and Pinning (mm)
3rd angle
projection
SIP3 PIN Package
+Vin
-Vin
R-785.0-1.0
-15VDC
+15VDC
Com
C1 C2
REC3-0515DRW/H4
- Medical Grade Isolated Dual Outputs
- Wide input range 6.5V to 18V
C1: Optional , C2 : Required (further decoupling filtering
may be necessary between the two converters) - High Efficiency, Suitable for 12V Battery Powered Devices
+Vin
-Vin
R-78xx-1.0
-Vout
+Vout
C1
C2
DC/DC Converter ( 1:1 )
- Improved loading / line regulation
- Wide Input Voltage Range
- Point-of-Load Architecture
- High isolation voltage
C1: Required (further decoupling filtering may be
necessary between the two converters), C2: Optional
R-78xx-1.0
Series
High efficiency, isolated, dual regulated outputs
Isolated (up to 6KV), wide Input range regulated output
Pin Connections
Pin #
1 +Vin
2 GND
3 +Vout
xx.x ±0.5mm
xx.xx ±0.25mm
Recommended Footprint Details
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