INNOLINE
DC/DC-Converter
with year Warranty
R-78B-1.5
1.5 AMP
SIP3
Single Output
●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
●Low ripple and noise
●“L” Version with 90° pins
Features
Selection Guide
Part Input Output Output Efficiency
Number* Range Voltage Current Min. Vin Max. Vin
SIP3 (V) (V) (A) (%) (%)
R-78B1.5-1.5 4.75 – 18 1.5 1.5 83 78
R-78B1.8-1.5 4.75 – 18 1.8 1.5 85 81
R-78B2.5-1.5 4.75 – 18 2.5 1.5 88 84
R-78B3.3-1.5 4.75 – 18 3.3 1.5 91 88
R-78B5.0-1.5 6.5 – 18 5.0 1.5 94 92
R-78B6.5-1.5 8.0 – 18 6.5 1.5 95 93
Output Power (%)
120
100
20
60
100750
-40
Operating Temperature (°C)
0
80
5025
71
Safe Operating Area
85
40
Derating-Graph
(Ambient Temperature)
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.
Description
* add Suffix “L” for 90° bent pins, e.g. R-78B5.0-1.5L
EN-55022 Certified
EN-55024 Certified
IEC/EN-60950-1 Certified
RoHS
2011/65/EU
6/6
Refer to Application Notes
Specifications (refer to the standard application circuit, Ta: 25°C, minimum load = 10 %)
Characteristics Conditions Min. Typ. Max.
Input Voltage Range All Series, see Selection Guide 4.75V 18.0V
Output Voltage Range (for customized parts) All Series 1.5V 6.5V
Output Current All Series 0mA* 1500mA
Short Circuit Input Current (Vin = 12V) All Series 100mA
Internal Power Dissipation 0.65W
Short Circuit Protection Continuous, automatic recovery
Output Voltage Accuracy (At 100% Load) All Series ±2% ±3%
Line Voltage Regulation (Vin = min. to max. at full load) All Series 0.3% 0.5%
Load Regulation (10% to 100% full load) All Series 0.6% 0.8%
Dynamic Load Stability (with Output Capacitor=100µF) 100% <-> 50% load ±80mV ±120mV
Transient Recovery Time 1.0ms 1.5ms
Ripple & Noise (10% to 100% full load) All Series 15mV 30mVp-p
Temperature Coefficient -40°C ~ +85°C ambient 0.015%/°C
Max capacitance Load with normal start-up time, no external components 1000µF
with <1 second start up time + diode protection circuit 6800µF
Switching Frequency 300kHz 340kHz 380kHz
continued on next page
www.recom-power.com I-25REV: 0/2015
Efficiency (%)
50
Efficiency Vs
Vin (Full Load)
Vo=1.8V
Vo=2.5V
Vo=5V
Vo=3.3V
25
Vin ( V )
10 15 18
75
100
Vo=1.5V
Vo=6.5V
5
Efficiency
Ripple (mV)
25
Ripple Vs
Vin (Full Load)
Vo=1.8V
Vo=2.5V
Vo=5V
Vo=3.3V
Vin ( V )
10 15 18
50
Vo=1.5V
Vo=6.5V
5
Ripple
R-78B-1.5
Characteristics Conditions Min. Typ. Max.
Quiescent Current Vin = min. to max. at 0% load 7mA 9mA
Input Reflected Ripple Current All Series 150mA 200mAp-p
Operating Temperature Range -40°C +85°C
Operating Case Temperature +100°C
Storage Temperature Range -55°C +125°C
Case Thermal Impedance 60°C / W
Relative Humidity 95% RH
Case Material Epoxy with Non-Conductive Plastic Case (UL94V-0)
Package Weight 4g
Packing Quantity 42 pcs per Tube
Conducted Emissions EN55022 Class B
Radiated Emissions EN55022 Class B
ESD EN61000-4-2 Class A
IEC/EN General Safety Report: SPCLVD 1407030-1 IEC/EN-60950-1, 2nd Edition
MTBF (+25°C) using MIL-HDBK 217F 3250 x 10³ hours
(+71°C) using MIL-HDBK 217F 1059 x 10³ hours
R-78Bxx-1.5
(L) Series
Specifications (refer to the standard application circuit, Ta: 25°C, minimum load = 10 %)
INNOLINE
DC/DC-Converter
}
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
R-78Bxx-1.5
-Vout
+Vout
+Vin
-Vin
Typical Application Circuit
Characteristics
I-26 www.recom-power.comREV: 0/2015
R-78B-1.5
INNOLINE
DC/DC-Converter
Characteristics
Efficiency (%)
100
Efficiency Vs
Load ( Vin=Max )
Vo=1.5V
Vo=3.3V
Vo=5V
Vo=2.5V
50
Output Current ( A )
0.5 1.0 1.5
75
25
Vo=1.8V
Vo=6.5V
Efficiency (%)
100
Efficiency Vs
Load ( Vin=Min )
Vo=1.5V
Vo=3.3V
Vo=5V
Vo=2.5V
50
Output Current ( A )
0.5 1.0 1.5
75
25
Vo=1.8V
Vo=6.5V
Ripple (mV)
50
Ripple Vs
Load ( Vin=Max )
Vo=1.5V
Vo=2.5V
Vo=5V
Vo=3.3V
25
Output Current ( A )
0.5 1.0 1.5
Vo=6.5V
Vo=1.8V
R-78Bxx-1.5
(L) Series
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 Circuit
Optional Protection 1: Optional Protection 2:
R-78xx-xx
-Vout
+Vout
+Vin
-Vin
R-78xx-xx
-Vout
Vout=
+Vout -
0.3V
+Vin
-Vin
Schottky Diode
Efficiency Ripple
www.recom-power.com I-27REV: 0/2015
R-78B-1.5
2.54
2.54
Top View
Bottom View
8.50
2.0
0.25
5.08
3.21
213
4.10
0.51 typ.
0.7 ±1.0
17.5
RECOM
R-78B5.0-1.5
****
Pb
1.00ø+0.15/0
11.50
RECOM
R-78B5.0-1.5
****
Pb
8.50
4.10
1.50 max
Front View Front View
Application Examples
INNOLINE
DC/DC-Converter
Package Style and Pinning (mm)
SIP3 PIN Package
+Vin
-Vin
R-78B5.0-1.5
-15V@66mA
+15V@66mA
0V Isolated
Common
22µF
R05P215D/P
- 5.2kV isolated short circuit protected outputs for analogue circuits, e.g. medical grade interface
- Wide input range suits both 12V and 7.2V battery packs
+5V@1A
- High efficiency +5V/1A protected output for digital circuits
+5V Rtn
- Further decoupling filtering may be necessary between the converters
+Vin
-Vin
R-78B5.0-1.0 +5V@1A
C1
C2
RP10-4812SEW
- Improved loading / line regulation
- Wide Input Voltage Range - 18~75V C2,C3 : optional
- Point-of-Load Architecture
- High isolation voltage - 1.6kV
R-78B3.3-1.0
0V
+3.3V@1A
C3
+12V@0.1A
- C1 is required. Further decoupling filtering
may be necessary between the converters
R-78Bxx-1.5
(L) Series
High efficiency multiple output
Isolated, wide Input range, Distributed Power Architecture (Point of Load)
Pin Connections
Pin #
1 +Vin
2 GND
3 +Vout
xx.x ±0.5mm
xx.xx ±0.25mm
Recommended Footprint Details
L - Version
I-28 www.recom-power.comREV: 0/2015
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.
Mouser Electronics
Authorized Distributor
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RECOM:
R-78B3.3-1.5 R-78B5.0-1.5 R-78B1.5-1.5 R-78B1.5-1.5L R-78B1.8-1.5 R-78B1.8-1.5L R-78B2.5-1.5 R-78B2.5-
1.5L R-78B3.3-1.5L R-78B5.0-1.5L R-78B6.5-1.5 R-78B6.5-1.5L