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R-78Bxx-1.5L Datasheet PDF
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Features
Efficiency up to 95%,Non isolated,
no need for heatsinks
Pin-out compatible with LM78XX Linears
Low profile( L*W*H=11.5*8.5*17.5mm)
Wide input range.(4.75V ~ 18V)
Short circuit protection, Thermal shutdown
Non standard outputs available as specials
between 1.5V ~ 6.5V
Low ripple and noise
“L” Version with 90° pins
INNOLINE
DC/DC-Converter
R-78Bxx-
1.5(L)
Series
1.5 AMP
SIP3
Single Output
Selection Guide
Part
Number*
SIP3
Input
Range
(V)
Output
Voltage
(V)
R-78B1.5-1.5
4.75 – 18
1.5
R-78B1.8-1.5
4.75 – 18
1.8
R-78B2.5-1.5
4.75 – 18
2.5
R-78B3.3-1.5
4.75 – 18
3.3
R-78B5.0-1.5
6.5 – 18
5.0
R-78B6.5-1.5
8.0 – 18
6.5
* add Suffix “L” for 90° bent pins, e.g. R-78B5.0-1.5L
Output
Current
(A)
1.5
Efficiency
Min. Vin Max. Vin
(%) (%)
83 78
1.5 85 81
1.5 88 84
1.5 91www.DataSheet4U.com
1.5 94
88
92
1.5 95 93
Description
The R-78Bxx-1.5 Series high efficiency switching regulators are ideally suited to replace 78xx linear regula-
tors 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.
Derating-Graph
(Ambient Temperature)
120
100
80
60
40 Safe Operating Area
20
0
-40 0
25 50
7585 100
71
Operating Temperature (°C)
www.recom-international.com
13-February-2007
1


R-78Bxx-1.5L Datasheet PDF
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INNOLINE
DC/DC-Converter
R-78Bxx-1.5
(L) Series
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)
Output Current Limit
Short Circuit Input Current
Internal Power Dissipation
Short Circuit Protection
Output Voltage Accuracy (At 100% Load)
Line Voltage Reguölation (Vin = min. to max. at full load)
Load Regulation (10% to 100% full load)
Dynamic Load Stability (with Output Capacitor=100µF)
Ripple & Noise (10% to 100% full load)
Temperature Coefficient
Max capacitance Load
Switching Frequency
Quiescent Current
Input Reflected Ripple Current
Operating Temperature Range
Operating Case Temperature
Storage Temperature Range
Case Thermal Impendance
Thermal Shutdown
Relative Humidity
Case Material
Package Weight
}MTBF (+25°C)
. (+71°C)
Detailed Information see
Application Notes chapter "MTBF"
Conditions
All Series, see Selection Guide
All Series
All Series
All Series
All Series
All Series
All Series
All Series
100% <-> 50% load
Transient Recovery Time
All Series
-40°C ~ +85°C ambient
Vin = min. to max. at 0% load
All Series
Internal IC junction
using MIL-HDBK 217F
using MIL-HDBK 217F
Min. Typ. Max.
4.75 18.0V
1.5 6.5V
0 1500mA
5000mA
60 80mA
0.65W
Continuous, automatic recovery
±2 ±3%
0.2 0.4%
20 25mV
±80 ±120mV
1.0 1.5ms
15 30mVp-p
0.015%/°C
1000µF
300 340 380kHz
7 9mA
150 200mAp-p
-40°C
+85°C
+100°C
-55°C
+125°C
60°C / W
+160°C
95% RH
Epoxy with Non-Conductive Plastic Case(UL94V-0)
4g
3250 x 10³ hours
1059 x 10³ hours
Note 1: The converter requires a minimum load of 6mA to start up properly. Once started, the load can be reduced to 0%
Standard Application Circuit
+Vin
-Vin
R-78Bxx-1.5
+Vout
C1
100µF
(Option)
-Vout
Add a blocking diode to
Vout if current can flow
backwards into the out-
put, as this can damage
the converter.
2
13-February-2007
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R-78Bxx-1.5L Datasheet PDF
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INNOLINE
DC/DC-Converter
Characteristics
Efficiency
100
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=1.8V
75
Vo=2.5V
Vo=1.5V
50
25
5 10 15
Vin ( V )
Efficiency Vs Vin (Full Load)
18
100 Vo=6.5V
Vo=5V
VVoo==32..35VV
75 Vo=1.8V
Vo=1.5V
50
25
0.5 1.0
Output Current ( A )
Efficiency Vs Load ( Vin=Max )
1.5
R-78Bxx-1.5
(L) Series
Ripple
50
25
Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
5 10
Vin ( V )
Ripple Vs Vin (Full Load)
15
18
50
25 Vo=6.5V
Vo=5V
Vo=3.3V
Vo=2.5V
Vo=1.8V
Vo=1.5V
0.5 1.0
Output Current ( A )
Ripple Vs Load ( Vin=Max )
1.5
100 VVoo==56V.5V
Vo=3.3V
75
Vo=2.5V
Vo=1.8V
Vo=1.5V
50
25
0.5 1.0
Output Current ( A )
Efficiency Vs Load ( Vin=Min )
1.5
50
25
Vo=6.5V
Vo=5V
Vo=2.5,V, 3.3V
Vo=1.5V, 1.8V
0.5 1.0
Output Current ( A )
Ripple Vs Load ( Vin=Min )
1.5
www.recom-international.com
13-February-2007
3


R-78Bxx-1.5L Datasheet PDF
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INNOLINE
DC/DC-Converter
Application Examples
High efficiency multiple output
R-78Bxx-1.5
(L) Series
+Vin R-78B5.0-1.5
R05P215D/P
22µF
-Vin
+5V@1A
+15V@66mA
0V Isolated
Common
-15V@66mA
- 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
+5V Rtn
Isolated, wide Input range, Distributed Power Architecture (Point of Load)
REC10-4805SRWZ/H
+5V@0.25A
+Vin
R-78B3.3-1.5
+3.3V@1.5A
C1
-Vin
- 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
C2
C2,C3 : optional
R-78B1.8-1.5
+1.8V@1.5A
Package Style and Pinning (mm)
SIP3 PIN Package
RECOM
R-78B5.0-1.5
17.5 ****
Pb 0.51 typ.
4.10 0.7 typ.
11.50
Bottom View
0.25
3.21 5.08 2.0
4
C3
0V
8.50 8.50
4.10
1.50 max
L - Version
Recommended Footprint Details
1.00ø+0.15/–0
2.54
Top View
2.54
13-February-2007
3rd angle
projection
RECOM
R-78B5.0-1.5
****
Pb
123
Pin Connections
Pin #
1 +Vin
2 GND
3 +Vout
xx.x ±0.5mm
xx.xx ±0.25mm
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