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vFeatures
Efficiency up to 94%, no need for heatsinks!
Pin-out compatible with LM78XX Linear Regs.
Low profile (L*W*H=11.5*7.5*10.2mm)
Wide input range (4.75V ~ 18V)
Short circuit protection, thermal shutdown
Non-standard outputs available as specials
Low ripple and noise
Description
The R-78xx-1.0 series switching regulators are ideally suited to replace 1 Amp 78xx linear regulators and are pin
compatible. Efficiencies 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.
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
Specifications ( typical at 25°C, 10% minimum load, unless otherwise specified )
Characteristics
Input Voltage Range
Conditions
All Series
Min.
4.75V
Typ.
Max.
18V
Output Voltage Range
All Series
1.5V
5.5V
Output Current
Short Circuit Input Current (Vin =12V)
All Series
All Series
0mA*
1000mA
100mA
Internal Power Dissipation
0.4W
Short Circuit Protection
Output Voltage Accuracy (At 100% Load) All Series
Continuous, automatic recovery
±2% ±3%
Line Regulation (100% Load, Vin max.) All Series
0.2% 0.4%
Load Regulation (10 to 100% full load)
Dynamic Load Stability
All Series
100% <-> 50% load
0.4% 0.6%
±85mV ±100mV
Ripple & Noise (20Mhz BW)
All Series
Temperature Coefficient
-40°C ~ +85°C ambient
Max capacitance Load with normal start-up time, no external components
20mVp-p 30mVp-p
0.015%/°C
470µF
with <1 second start up time + diode protection circuit
6800µF
Switching Frequency
280kHz 350kHz 430kHz
Quiescent Current
Vin = min. to max. at 0% load
5mA 7mA
Operating Temperature Range
Operating Case Temperature (with derating)
-40°C to +85°C
+100°C
Storage Temperature Range
-55°C to +125°C
Case Thermal Impedance
Case Material
70°C/W
Non-Conductive Black Plastic
Potting Material
Silicone (UL94V-0)
Conducted Emissions (with filter)
Radiated Emissions (with filter)
EN55022
EN55022
Class B
Class B
ESD
EN61000-4-2
Class A
Radiated Immunity
Fast Transient
EN61000-4-3
EN61000-4-4
Class A
Class A
Conducted Immunity
EN61000-4-6
Class A
Magnetic Field Immunity
EN61000-4-8
Class A
Certifications
IEC/EN General Safety
Report: LVD 1603123
IEC/EN-60950-1, 2nd Edition + AM:2
EMC
Package Weight
Report: 5A111502E
EN 55022, EN55024, EN61000
1.9g
Packing Quantity
42 pcs per Tube
}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.
I-12 REV: 1/2016
INNOLINE
DC/DC-Converter
with 3 year Warranty
1.0 AMP
SIP3
Single Output
RoHS
2011/65/EU
6/6
EN-55022 Certified
EN-55024 Certified
IEC/EN-60950-1 Certified
R-78-1.0
Derating-Graph
(Ambient Temperature)
120
100
80
60
40 Safe Operating Area
30
20
0
-40
0
25
50
7585 100
60
Operating Temperature (°C)
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INNOLINE
DC/DC-Converter
Characteristics
Efficiency
R-78xx-1.0
Series
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
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
*Note: Operation under no load will not damage these devices, however they may not meet all specifications. A minimum load of 10mA is recommended
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REV: 1/2016
I-13

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INNOLINE
DC/DC-Converter
Optional Protection Circuit
Add a blocking diode to Vout if
current can flow backwards into
the output, as this can damage
the converter when it is powered
down.
The diode can either be fitted
across the device if the source is
low impedance or fitted in series
with the output (recommended).
+Vin
GND
Optional Protection 1:
R-78xx-xx
+Vout
+Vin
GND GND
R-78xx-1.0
Series
Optional Protection 2:
R-78xx-xx
Schottky Diode
Vout=
+Vout -
0.3V
GND
Application Examples
High efficiency, isolated, dual regulated outputs
+Vin R-785.0-1.0
REC3-0515DRW/H4
+15VDC
Com
C1 C2
GND
- Medical Grade Isolated Dual Outputs
GND
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
R-78xx-1.0
+Vout
GND
- High isolation voltage
- Improved loading / line regulation
- Wide Input Voltage Range
- Point-of-Load Architecture
Package Style and Pinning (mm)
C1
C1 , C2 : optional
C2
GND
SIP3 PIN Package
RECOM
10.2
R-785.0-1.0
**** Pb
0.51 typ.
7.55
Front
RECOM
R-785.0-1.0
**** Pb
4.10 0.7 ±0.1
11.50
0.25 Bottom View
2.0
3.21 5.08
Recommended Footprint Details
1.00ø+0.15/–0
2.54
Top View
2.54
123
Pin Connections
Pin #
1
2
3
xx.x ±0.5mm
xx.xx ±0.25mm
+Vin
GND
+Vout
The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit
written consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer
shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications.
I-14
REV: 1/2016
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