www.recom-power.com REV.: 2/2019 ECO-1
Features
Unregulated
Converters
• Single output rail
• Industry standard pinout
• 1kVDC/1s or 2kVDC/1s basic isolation
• High efficiency for low power applications
• UL94V-0 package material
• Optional continuous short circuit protection
• Fully encapsulated
• Efficiency up to 76%
RM
Description
The RM series DC/DC converter has been designed for isolating or converting DC power rails with very
light loads. Efficiencies are typically 10% higher than a comparable 0.5W or 1W converters run at the
same low load.
DC/DC Converter
0.25 Watt
SIP4
Single Output
UL60950-1 certified
CAN/CSA-C22.2 No. 60950-1-03 certified
IEC60950-1 certified
EN60950-1 certified
EN55032 compliant
E358085
Selection Guide
Part nom. Input Output Output Efficiency max. Capacitive
Number Voltage Voltage Current typ.
(1) Load
(2)
[VDC] [VDC] [mA] [%] [µF]
RM-xx3.3S (3,4) 3.3, 5, 12, 15, 24 3.3 75 62-70 1000
RM-xx05S (3,4) 3.3, 5, 12, 15, 24 5 50 66-72 470
RM-xx09S (3,4) 3.3, 5, 12, 15, 24 9 28 70-72 470
RM-xx12S (3,4) 3.3, 5, 12, 15, 24 12 21 70-72 150
RM-xx15S (3,4) 3.3, 5, 12, 15, 24 15 17 70-76 150
Model Numbering
Notes:
Note3: standard part is without continuous short circuit protection
add suffix „/P“ for continuous short circuit protection
Note4: add suffix „/H“ for 2kVDC/1s isolation
or add suffix „/HP“ for continuous short circuit protection and 2kVDC/1s isolation
Ordering Examples:
RM-1205S/P: 12V Input Voltage, 5V Output Voltage, Single Output with continuous short circuit protection
RM-0505S/HP: 5V Input Voltage, 5V Output Voltage, Single Output with 2kVDC/1s isolation and continuous short circuit protection
Input Voltage
Output Voltage
RM- __ __S/_
Protection (3)
Isolation Option (4)
Single
Notes:
Note1: Efficiency is tested at nominal input and full load at +25°C ambient
Note2: Max Cap Load is tested at nominal input and full resistive load and is defined as the
capacitive load that will allow start up in under 1s without damage to the converter
www.recom-power.com REV.: 2/2019 ECO-2
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm up unless otherwise stated)
RM
Series
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Input Voltage Range ±10%
Minimum Load 0%
Internal Operating Frequency 50kHz 90kHz 105kHz
Output Ripple and Noise 20MHz BW 50mVp-p
Efficiency vs. Load
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 [%]
3.312
0512
1212
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 [%]
0515
1215
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 [%]
3.305
0505
1205
RM-xx05S RM-xx12S
RM-xx15S
REGULATIONS
Parameter Condition Value
Output Accuracy ±5.0% max.
Line Regulation low line to high line ±1.2% of 1.0% Vin typ.
continued on next page
www.recom-power.com REV.: 2/2019 ECO-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm up unless otherwise stated)
RM
Series
Parameter Condition Value
Load Regulation (5) 10% to 100% load
3.3Vout
5Vout
12, 15, 24Vout
20.0% max.
15.0% max.
10.0% max.
PROTECTIONS
Parameter Type Value
Short Circuit Protection (SCP) without suffix
with suffix “/P”
1 second
continuous
Isolation Voltage (6) I/P to O/P
without suffix tested for 1 second
rated for 1 minute
1kVDC
500VAC/60Hz
with suffix
“/H”
tested for 1 second
rated for 1 minute
2kVDC
1.4kVAC/60Hz
Isolation Resistance 10GΩ min.
Isolation Capacitance 25pF min. / 82pF max.
Insulation Grade basic
Notes:
Note6: For repeat Hi-Pot testing, reduce the time and/or the test voltage
Note7: Refer to local wiring regulations if input over-current protection is also required. Recommended fuse: T0.5A slow blow type
Deviation vs. Load
25
15
5
-5
20
10
0
-10
Deviation [%]
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
3.305
0505
1205
25
15
5
-5
20
10
0
-10
Deviation [%]
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
3.312
0512
1212
25
15
5
-5
20
10
0
-10
Deviation [%]
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
0515
1215
RM-xx05S RM-xx12S
RM-xx15S
Notes:
Note5: Operation below 10% load will not harm the converter, but specifications may not be met
www.recom-power.com REV.: 2/2019 ECO-4
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm up unless otherwise stated)
RM
Series
SAFETY AND CERTIFICATIONS
Certificate Type (Safety) Report / File Number Standard
Information Technology Equipment, General Requirements for Safety SPCLVD1602031 IEC60950-1:2005, 2nd Edition + A2:2013
EN60950-1:2006 + A2:2013
Information Technology Equipment, General Requirements for Safety E358085-A4-UL UL60950-1, 2nd Edition:2007
CAN/CSA C22.2 No. 60950-1-03, 2nd Edition:2007
EAC RU-AT.49.09571 TP TC 004/2011
RoHS 2+ RoHS-2011/65/EU + AM-2015/863
EMC Compliance Condition Standard / Criterion
Electromagnetic compatibility of multimedia equipment -
Emission requirements
with external filter
(see filter suggestion below)
EN55032, Class B
EN55032, Class A
continued on next page
-40 -20 0 20 40 7060-30 -10 10 30 50 80 90
85
110100
100
80
60
40
90
70
50
30
20
10
0
Output Load [%]
Ambient Temperature [°C]
ENVIRONMENTAL
Parameter Condition
Value
Operating Temperature Range full load @ free air convection (see graph) -40°C to +85°C
Operating Altitude 2000m
Operating Humidity non-condensing 95% RH max.
Pollution Degree PD2
MTBF according to MIL-HDBK-217F, G.B. +25°C
+85°C
1327 x 103 hours
302 x 103 hours
Derating Graph
(@ free air convection)
C
1
-Vout
+Vout
-Vin
+Vin
C3
C2
+Vout
+Vin
-Vout
-Vin
L1
EMC Filter Suggestion according to EN55032
www.recom-power.com REV.: 2/2019 ECO-5
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm up unless otherwise stated)
RM
Series
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter
Type
Value
Material
case
potting
PCB
non-conductive black plastic (UL94 V-0)
epoxy, (UL94 V-0)
FR4, (UL94 V-0)
Dimension (LxWxH) 11.5 x 6.0 x 10.0mm
Weight 1.4g typ.
PACKAGING INFORMATION
Parameter Type Value
Packaging Dimension (LxWxH) tube 520.0 x 16.0 x 9.0mm
Packaging Quantity tube 42pcs
Storage Temperature Range -55°C to +125°C
Storage Humidity non-condensing 95% RH max.
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.
Bottom View
1 2 3 4
2.54
2.54
Top View
0.51
1.25 10.0
0.51+0.10/-0.05
11.5
7.621.90
4.10
0.25
±0.05
6.0
Marking
embossed logo
1 2 3 4
Dimension Drawing (mm)
Recommended Footprint Details
Pinning information
Pin # Single
1 -Vin
2 +Vin
3 -Vout
4 +Vout
Tolerance:
xx.x= ±0.5mm
xx.xx= ±0.25mm
Component List Class A Component List Class B
MODEL C1 L1 C2 (safety) C3 (safety)
RM-0505S 10µF
100V MLCC
22µH choke
RLS-226 1nF 2.2nFRM-1205S
RM-2405S
MODEL C1 L1 C2 (safety) C3 (safety)
RM-0505S 10µF
100V MLCC N/A N/A
N/A
RM-1205S 2.2nF
RM-2405S N/A
Notes:
Note8: Filter suggestions are valid for indicated part numbers only. For other part numbers, please contact RECOM tech support for advice
