The R-78Bxx-1.5 Series high efficiency switching regulators are ideally suited to replace 78xx linear regulators and
are pin compatible. The efficiency of up to 95% 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.
1.5 AMP
SIP3
Single Output
Selection Guide
Part
Number*
SIP3
R-78B1.5-1.5
R-78B1.8-1.5
R-78B2.5-1.5
R-78B3.3-1.5
R-78B5.0-1.5
R-78B6.5-1.5
Input
Range
(V)
4.75 – 18
4.75 – 18
4.75 – 18
4.75 – 18
6.5 – 18
8.0 – 18
Output
Voltage
(V)
1.5
1.8
2.5
3.3
5.0
6.5
Output
Current
(A)
1.5
1.5
1.5
1.5
1.5
1.5
Efficiency
Min. Vin
Max. Vin
(%)
(%)
83
85
88
91
94
95
78
81
84
88
92
93
2011/65/EU
6/6
RoHS
EN-55022 Certified
EN-55024 Certified
IEC/EN-60950-1 Certified
* add Suffix “L” for 90° bent pins, e.g. R-78B5.0-1.5L
R-78B-1.5
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
Short Circuit Input Current
(Vin = 12V)
Internal Power Dissipation
Short Circuit Protection
Output Voltage Accuracy
(At 100% Load)
Load Regulation
(10% to 100% full load)
Transient Recovery Time
Ripple & Noise
(10% to 100% full load)
Temperature Coefficient
Max capacitance Load
Switching Frequency
All Series
-40°C ~ +85°C ambient
with normal start-up time, no external components
300kHz
340kHz
All Series
All Series
1.0ms
Line Voltage Regulation
(Vin = min. to max. at full load)
All Series
Dynamic Load Stability
(with Output Capacitor=100µF)
100% <-> 50% load
±2%
0.3%
0.6%
±80mV
1.5ms
15mV
30mVp-p
0.015%/°C
1000µF
380kHz
Conditions
All Series,
see Selection Guide
All Series
All Series
All Series
Min.
4.75V
1.5V
0mA*
Typ.
Max.
18.0V
6.5V
1500mA
100mA
0.65W
Continuous, automatic recovery
±3%
0.8%
±120mV
Output Power (%)
Derating-Graph
(Ambient Temperature)
120
100
80
60
40
20
0
0.5%
Safe Operating Area
-40
0
25
50
Operating Temperature (°C)
85
75
100
71
with <1 second start up time + diode protection circuit 6800µF
continued on next page
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REV: 1/2016
I-25
INNOLINE
DC/DC-Converter
Specifications
(refer to the standard application circuit, Ta: 25°C, minimum load = 10 %)
Characteristics
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
Conditions
Vin = min. to max. at 0% load
All Series
R-78Bxx-1.5
(L) Series
Min.
Typ.
7mA
150mA
-40°C
-55°C
Max.
9mA
200mAp-p
+85°C
+100°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
3250 x 10³ hours
1059 x 10³ hours
}
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
+Vin
R-78B-1.5
R-78Bxx-1.5
+Vout
GND
GND
Characteristics
Efficiency
100
75
50
Ripple
Ripple (mV)
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=1.8V
Vo=2.5V
Vo=1.5V
50
25
Efficiency (%)
25
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
5
10
15
18
5
10
15
18
Vin ( V )
Efficiency Vs
Vin (Full Load)
Vin ( V )
Ripple Vs
Vin (Full Load)
I-26
REV: 1/2016
www.recom-power.com
INNOLINE
DC/DC-Converter
Characteristics
R-78Bxx-1.5
(L) Series
Ripple
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
0.5
1.0
1.5
Ripple (mV)
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
0.5
1.0
1.5
Output Current ( A )
Efficiency Vs
Load ( Vin=Max )
Output Current ( A )
Ripple Vs
Load ( Vin=Max )
100
75
50
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
50
25
Efficiency (%)
25
Ripple (mV)
Vo=6.5V
Vo=5V
Vo=2.5,V, 3.3V
Vo=1.5V, 1.8V
0.5
1.0
1.5
R-78B-1.5
0.5
1.0
1.5
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).
GND
GND
GND
Optional Protection 2:
+Vin
R-78xx-xx
+Vout
+Vin
R-78xx-xx
Schottky Diode
Vout=
+Vout -
0.3V
GND
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REV: 1/2016
I-27
INNOLINE
DC/DC-Converter
Application Examples
High efficiency multiple output
+Vin
R-78Bxx-1.5
(L) Series
R-78B5.0-1.5
R05P215D/P
+15V@66mA
+5V@1A
22µF
GND
0V Isolated
Common
-15V@66mA
+5V Rtn
- Wide input range suits both 12V and 7.2V battery packs
- 5.2kV isolated short circuit protected outputs for analogue circuits, e.g. medical grade interface
- High efficiency +5V/1A protected output for digital circuits
- Further decoupling filtering may be necessary between the converters
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-1.5
R-78B3.3-1.0
+3.3V@1A
C3
0V
Package Style and Pinning (mm)
SIP3 PIN Package
RECOM
R-78B5.0-1.5
****
Pb
8.50
Front View
8.50
Front View
4.10
1.50 max
RECOM
R-78B5.0-1.5
****
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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