R-78Bxx-1.5 Series Datasheet by Recom Power

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www.recom-power.com REV.: 5/2020 I-1
R-78B-1.5(L)
DC/DC Converter
1.5 Amp
SIP3
Single Output
EN55032 compliant
IEC/EN60950-1 certified
R-78B-2.0 Series
PREFERRED ALTERNATIVES
Please consider these alternatives:
Features
Switching
Regulator
Efficiency up to 95%, no heatsinks required
Pin compatible with LM78XX linears
Low profile (L/W/H=11.5 x 8.5 x 17.5mm)
Wide input range
Short circuit protection, thermal shutdown
Low ripple and noise
„L“ version with 90° pins
Description
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.
Y
E
A
R
w
a
r
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a
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3
R
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C
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C
O
N
V
E
R
T
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R
S
C
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P
L
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A
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T
P
R
O
D
U
C
T
S
RoHS
RoHS
2
2
+
+
compliant
compliant
10 from 10
10 from 10
R
E
C
O
M
C
O
N
V
E
R
T
E
R
S
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P
L
I
A
N
T
P
R
O
D
U
C
T
S
REACH
REACH
compliant
compliant
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Quiescent Current nom. Vin= 12VDC 7mA 9mA
Internal Power Dissipation Vout= 1.5VDC 0.65W
Internal Operating Frequency
nom. Vin= 12VDC 300kHz 340kHz 380kHz
Minimum Load (2) 0%
Output Ripple and Noise (3) 20MHz BW 15mVp-p 30mVp-p
Ref. Back Ripple Current
150mAp-p
200mAp-p
Absolute Maximum
Capacitive Load
1 second start up, no external components
<1 second start up + diode protection circuit
1000µF
6800µF
continued on next page
Selection Guide
Part Input Output Output Efficiency
Number Voltage Range Voltage Current @ min Vin @ max. Vin
[VDC] [VDC] [A] [%] [%]
R-78B3.3-1.5 (1) 4.75 - 18 3.3 1.5 91 88
R-78B5.0-1.5 (1) 6.5 - 18 5.0 1.5 94 92
R-78B6.5-1.5 (1) 8.0 - 18 6.5 1.5 95 93
Selection Guide (NRND, last time buy: 16th Nov 2020)
Part Input Output Output Efficiency
Number Voltage Range Voltage Current @ min Vin @ max. Vin
[VDC] [VDC] [A] [%] [%]
R-78B1.5-1.5 (1) 4.75 - 18 1.5 1.5 83 78
R-78B1.8-1.5 (1) 4.75 - 18 1.8 1.5 85 81
R-78B2.5-1.5 (1) 4.75 - 18 2.5 1.5 88 84
Notes:
Note1: add suffix “L for 90° bent pins, e.g. R-78B5.0-1.5L
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Model Numbering
Output Voltage Pinning
Output Current
R-78B__-1.5(L)
Notes:
Note2: Operation under no load will not harm the converter, but specifications may not be met
A minimum load of 10mA is recommended
Note3: Output Ripple and Noise is tested from 10% to 100% load
Series Eniciency [We] Eniciency [“lu] Efliciency [“lu] Ripple [mV] Ripple [HIV] Ripple [mV]
www.recom-power.com REV.: 5/2020 I-2
DC/DC Converter
R-78Bxx-1.5(L)
Series
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Efficiency vs. Vin (full load)
Efficiency vs. Load (max. Vin)
Efficiency vs. Load (min. Vin)
Ripple vs. Vin (full load)
Ripple vs. Load (max. Vin)
Ripple vs. Load (min. Vin)
4.75 7 9 11 13 15 17 18
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Input Voltage [VDC]
6.5Vout
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
6.5Vout
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
6.5Vout
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
4.75 7 9 11 13 15 17 18
50
40
30
20
45
35
25
15
10
5
0
Ripple [mV]
Input Voltage [VDC]
6.5Vout
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90
100
50
30
40
20
35
45
25
15
10
5
0
Ripple [mV]
Output Load [%]
6.5Vout
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90
100
50
35
45
25
30
40
20
15
10
5
0
Ripple [mV]
Output Load [%]
6.5Vout
5Vout
3.3, 2.5Vout
1.8, 1.5Vout
www.recom-power.com REV.: 5/2020 I-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78Bxx-1.5(L)
Series
PROTECTIONS
Parameter
Condition
Short Circuit Protection (SCP) below 100mWcontinuous, automatic recovery
Short Circuit Input Current nom. Vin= 12VDC 100mA max.
REGULATIONS
Parameter Condition Value
Output Accuracy 100% load ±2.0% typ / ±3.0% max.
Line Regulation low line to high line, 100% load ±0.3% typ. / ±0.5% max.
Load Regulation 10% to 100% load ±0.6% typ. / ±0.8% max.
Transient Response 100% <-> 50% load
Recovery Time
±80mV typ. / ±120mV max.
1.0ms min. / 1.5ms typ.
ENVIRONMENTAL
Parameter Condition
Value
Operating Temperature Range with derating (see graph) -40°C to +85°C
Maximum Case Temperature +100°C
Temperature Coefficient ±0.015%/K
Thermal Impedance 0.1m/s, vertical 60K/W
Operating Altitude 2000m
Operating Humidity non-condensing 95% RH max.
Pollution Degree PD2
MTBF according to MIL-HDBK-217F, G.B. +25°C 5019 x 103 hours
-40 -20 0 20 40 70
71 85
60-30 -10 10 30 50 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Output Load [%]
Ambient Temperature [°C]
Derating Graph
Optional Diode Protection Circuit
Optional Protection 1: Optional Protection 2:
+Vin +Vout
GNDGND
+Vin +Vout=
+Vout - 0.3V
R-78Bxx-1.5
GND
+V
out
+V
in
R-78Bxx-1.5
GNDGND
GND
+V
out
+V
in
+Vin +Vout
GNDGND
+Vin +Vout=
+Vout - 0.3V
R-78Bxx-1.5
GND
+V
out
+V
in
R-78Bxx-1.5
GNDGND
GND
+V
out
+V
in
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).
www.recom-power.com REV.: 5/2020 I-4
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78Bxx-1.5(L)
Series
SAFETY AND CERTIFICATIONS
Certificate Type (Safety) Report / File Number Standard
Information Technology Equipment, General Requirements for Safety
1603123 IEC60950-1:2005, 2nd Edition + AM 2:2013
EN60950-1:2006 + AM 2:2013
EAC RU-AT.49.09571 TP TC 004/2011
RoHs 2+ RoHS 2011/65/EU + AM2015/863
EMC Compliance Condition Standard / Criterion
Electromagnetic compatibility of multimedia equipment -
Emission requirements
with external filter
(see filter suggestion below) EN55032, Class A and B
ESD Electrostatic Discharge Immunity Test Air ±8kV, Contact ±4kV EN61000-4-2, Criteria A
Radiated, Radio-Frequency, Electromagnetic Field Immunity Test 3V/m EN61000-4-3, Criteria A
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter Type Value
Material case
potting
non-conductive black plastic, (UL94 V-0)
silicone, (UL94 V-0)
Package Dimension (LxWxH) 11.5 x 8.5 x 17.5mm
Package Weight 4g typ.
continued on next page
EMC Filter Suggestion according to EN55032
R-78Bxx-1.5
C
1
C
2
GND
+V
out
+V
in
GND
+V
out
GND
+V
in
L
1
Component List Class A Component List Class B
MODEL C1 L1
R-78B3.3-1.5(L) 10µF
100V MLCC
3.9µH choke
RLS-397
MODEL C1 C2 L1
R-78B3.3-1.5(L) 10µF
100V MLCC
4.7µF
50V MLCC
5.6µH choke
RLS-567
Notes:
Note4: Filter suggestions are valid for indicated part numbers only. For other part numbers, please contact RECOM tech support for advice
@ fl
www.recom-power.com REV.: 5/2020 I-5
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78Bxx-1.5(L)
Series
INSTALLATION AND APPLICATION
continued on next page
High Efficiency Multiple Output
Application Examples
C2
C1
+Vin
-Vin
RP10-4812SEW
+12V @ 0.1A
0V @ 1A
- High isolation voltage - 1.6kV
- Improved load / line regulation
- Wide input voltage range - 18~75VDC
- Point-of-load architecture
- C1 is required. Further decoupling filtering
may be necessary between the converters
C2, C3: optional
C3
R-78Bxx-1.5
GND
+V
out
+V
in
R-78B5.0-1.5
GND
+V
out
+V
in
R-78B3.3-1.5
GND
+V
out
+V
in
22µF
+Vin
GND -15V @ 66mA
+5V Rtn
+15V @ 66mA
0V Isolated Com
P05P215D/P +5V @ 1A
+5V @ 1.5A
+3.3V @ 1.5A
- 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
+Vin +Vout
GNDGND
R-78Bxx-1.5
GND
+V
out
+V
in
Typical Application Circuit
Bottom View
Top View
321 321
8.511.5
17.5
4.10
2.00
0.51
0.70+0.10/-0.05 0.25±0.05
2.54
2.54
Marking
embossed logo
3.21 5.08
embossed logo
Bottom View
Top View
3
21
3
21
2.00
19.0
4.10
6.10
90-93°
Marking
8.5
11.5
0.70+0.10/-0.05
5.08
17.5
1.50
0.25±0.05
0.51
2.54
2.54
Dimension Drawing (mm)
Pin Connections
Pin # Single
1 +Vin
2 GND
3 +Vout
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
Recommended Footprint Details
Recommended Footprint Details
with suffix “L bent pins
4H7
www.recom-power.com REV.: 5/2020 I-6
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78Bxx-1.5(L)
Series
C2
C1
+Vin
-Vin
RP10-4812SEW
+12V @ 0.1A
0V @ 1A
- High isolation voltage - 1.6kV
- Improved load / line regulation
- Wide input voltage range - 18~75VDC
- Point-of-load architecture
- C1 is required. Further decoupling filtering
may be necessary between the converters
C2, C3: optional
C3
R-78Bxx-1.5
GND
+V
out
+V
in
R-78B5.0-1.5
GND
+V
out
+V
in
R-78B3.3-1.5
GND
+V
out
+V
in
22µF
+Vin
GND -15V @ 66mA
+5V Rtn
+15V @ 66mA
0V Isolated Com
P05P215D/P +5V @ 1A
+5V @ 1.5A
+3.3V @ 1.5A
- 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
The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer.
The
products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or
cause
loss of life, inflict bodily harm or damage property. The applicant 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.
PACKAGING INFORMATION
Parameter
Type
Value
Packaging Dimension (LxWxH) tube without suffix
with suffix “L
520.0 x 25.1 x 10.6mm
520.0 x 26.1 x 15.8mm
Packaging Quantity tube 42pcs
Storage Temperature Range -55°C to +125°C
Storage Humidity 95% RH max.
Isolated, Wide Input Range, Distributed Power Architecture (Point-of-Load)

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