The R-78Bxx-1.0 Series high efficiency switching regulators are ideally suited to replace 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.
The L-Version with 90° pins allows direct replacement for laid-flat regulators where component height is at a premium.
Low ripple and noise figures and a short circuit input current of typically only 10mA round off the specifications of this
versatile converter series.
1.0 AMP
SIP3
Single Output
Selection Guide
Part
Number
SIP3
R-78B1.5-1.0
R-78B1.8-1.0
R-78B2.5-1.0
R-78B3.3-1.0
R-78B5.0-1.0
R-78B6.5-1.0
R-78B9.0-1.0
R-78B12-1.0
R-78B15-1.0
Input
Range
(V)
4.75 – 26
4.75 – 26
4.75 – 32
4.75 – 32
6.5 – 32
9.0 – 32
12 – 32
16 – 32
20 – 32
Output
Voltage
(V)
1.5
1.8
2.5
3.3
5.0
6.5
9.0
12
15
Output
Current
(A)
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Efficiency
Min. Vin
Max. Vin
(%)
(%)
77
80
85
89
93
94
95
96
97
71
74
78
83
88
90
93
95
96
2011/65/EU
6/6
RoHS
EN-55022 Certified
EN-55024 Certified
EN-60601-1-2 Certified
IEC/EN-60950-1 Certified
R-78B-1.0
* add Suffix “L” for 90° bent pins, e.g. R-78B5.0-1.0L
Specifications
(refer to the standard application circuit, Ta: 25°C, minimum load = 10%)
Characteristics
Input Voltage Range
Output Voltage Range
(for customized parts)
Output Current (see Note 1)
Short Circuit Input Current
(Vin = 24V)
Internal Power Dissipation
Short Circuit Protection
Output Voltage Accuracy
(At 100% Load)
All Series
Line Voltage Regulation
(Vin = min. to max. at full load)
1.5V to 6.5V
9V to 15.5V
Load Regulation
(10% to 100% full load)
1.5V to 6.5V
9V to 15.5V
Dynamic Load Stability
(with Output Capacitor=100µF)
100% <-> 50% load
Transient Recovery Time
Ripple & Noise
(without Output Capacitor)
1.5V to 6.5V
(10% to 100% full load)
9V to 15.5V
Temperature Coefficient
-40°C ~ +85°C ambient
±2%
0.2%
0.1%
0.4%
0.25%
±100mV
1.0ms
15mVp-p
25mVp-p
Conditions
1.5V, 1.8V
2.5V to 15.5V
All Series
All Series
All Series
Min.
4.75V
4.75V
1.5V
0mA*
Typ.
25
32
Max.
26V abs. max.
34V abs. max.
15.5V
1000mA
60mA
0.65W
Continuous, automatic recovery
±3%
0.4%
0.2%
0.6%
0.4%
±150mV
1.5ms
20mVp-p
35mVp-p
0.015%/°C
continued on next page
www.recom-power.com
REV: 1/2016
I-21
Output Power (%)
Derating-Graph
(Ambient Temperature)
120
100
80
60
40
20
0
Safe Operating Area
-40
0
25
50
Operating Temperature (°C)
85
75
100
71
INNOLINE
DC/DC-Converter
Specifications
(refer to the standard application circuit, Ta: 25°C, minimum load = 10%)
Characteristics
Max capacitance Load
Switching Frequency
Quiescent Current
Input Reflected Ripple Current
Operating Temperature Range
Operating Case Temperature
Storage Temperature Range
Case Thermal Impedance
Relative Humidity
Case Material
Potting Material
Package Weight
Packing Quantity
Conducted Emissions
Radiated Emissions
ESD
IEC/EN General Safety
MTBF (+25°C)
.
(+71°C)
EN55022
EN55022
EN61000-4-2
Report: LVD 1603123
using MIL-HDBK 217F
using MIL-HDBK 217F
Vin = min. to max. at 0% load
All Series
Conditions
with normal start-up time, no external components
with <1 second start up time + diode protection circuit
R-78Bxx-1.0
(L) Series
Min.
Typ.
Max.
470µF
6800µF
380kHz
7mA
200mAp-p
+85°C
+100°C
-55°C
+125°C
60°C / W
95% RH
Epoxy with Non-Conductive Plastic Case (UL94V-0)
Silicone (UL94V-0)
4g
42 pcs per Tube
Class B
Class B
Class A
IEC/EN-60950-1, 2nd Edition + AM:2
6584 x 10³ hours
1139 x 10³ hours
280kHz
330kHz
5mA
150mA
-40°C
}
Detailed Information see
Application Notes chapter "MTBF"
*Note: Operation under no load will not damage these devices, however they may not meet all specifications. A minimum load of 10mA is recommended
Typical Application Circuit
R-78B-1.0
+Vin
C1
22µF
(Vin>30V)
R-78Bxx-1.0
+Vout
GND
To protect the converter during power-up, use C1=22µF if Vin>30V
GND
Characteristics
Efficiency
100
75
50
Vo=1.8V
Vo=1.5V
Vo=15V
Vo=12V
Vo=9V
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
50
Ripple
25
Efficiency (%)
25
Ripple (mV)
Vo=15V
Vo=9V,12V
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.5V,1.8V
10
20
34
10
20
34
Vin ( V )
Efficiency Vs
Vin (Full Load)
Vin ( V )
Ripple Vs
Vin ( Full Load )
I-22
REV: 1/2016
www.recom-power.com
INNOLINE
DC/DC-Converter
Characteristics
R-78Bxx-1.0
(L) Series
Ripple
Vo=15V
Vo=12V
Vo=9V
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
50
Efficiency
100
75
50
25
Efficiency (%)
25
0.2
0.4
0.6
0.8
1.0
1.2
Ripple (mV)
Vo=15V
Vo=9V, 12V
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.5V, 1.8V
0.2
0.4
0.6
0.8
1.0
1.2
Output Current ( A )
Efficiency Vs
Load ( Vin=Max )
Output Current ( A )
Ripple Vs
Load ( Vin=Max )
100
75
50
Vo=15V
Vo=12V
Vo=9V, 6,5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
50
25
Efficiency (%)
25
Ripple (mV)
Vo=9V,12V,15V
Vo=6.5V
Vo=2.5V,3.3V,5V
Vo=1.5V,1.8V
0.2
0.4
0.6
0.8
1.0
1.2
R-78B-1.0
0.2
0.4
0.6
0.8
1.0
1.2
Output Current ( A )
Efficiency Vs
Load ( Vin=Min )
Output Current ( A )
Ripple Vs
Load ( Vin=Min )
Optional Protection Circuit
Optional Protection 1:
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).
Optional Protection 2:
+Vin
R-78xx-xx
+Vout
+Vin
R-78xx-xx
Schottky Diode
Vout=
+Vout -
0.3V
GND
GND
GND
GND
www.recom-power.com
REV: 1/2016
I-23
INNOLINE
DC/DC-Converter
Application Examples
High efficiency multiple output
+Vin
R-78Bxx-1.0
(L) Series
R-78B5.0-1.0
RD-0512D
+12V@84mA
+5V@0.4A
C1
GND
C2
0V Com
-12V@84mA
C1: optional, C2: required (further
decoupling filtering may be necessary - Wide input range 6.5V to 34V
between the two converters)
- +/-12V outputs for analogue circuits, e.g. instrumentation amplifier
- +5V output for digital circuits
Isolated, wide Input range, Distributed Power Architecture (Point of Load)
RP10-4812SEW
+Vin
+12V@0.1A
C1
GND
- High isolation voltage - 1.6kV
- Improved loading / line regulation
- Wide Input Voltage Range - 18~75V
- Point-of-Load Architecture
- C1 is required. Further decoupling filtering
may be necessary between the converters
R-78B5.0-1.0
+5V@1A
C2
C2,C3 : optional
R-78B-1.0
R-78B3.3-1.0
+3.3V@1A
C3
0V
Package Style and Pinning (mm)
SIP3 PIN Package
8.50
RECOM
R-78B5.0-1.0
****
Pb
8.50
Front View
Front View
4.10
1.50 max
RECOM
R-78B5.0-1.0
****
Pb
17.5
0.51 typ.
4.10
0.7
±
1.0
L - Version
Recommended Footprint Details
1 2 3
Pin Connections
Pin #
1
+Vin
2
GND
3
+Vout
xx.x ±0.5mm
xx.xx ±0.25mm
11.50
0.25
3.21
Bottom View
1.00 ø+0.15/0
2.54
5.08
2.0
Top View
2.54
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.
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