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date 01/18/2021
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SERIES: PDM1-S │ DESCRIPTION: DC-DC CONVERTER
FEATURES
• 1 W isolated output
• smaller package
• single/dual unregulated output
• 1,500 Vdc isolation
• short circuit protection
• extended temperature range (-40~105°C)
• antistatic protection up to 8kV
• high efficiency at light load
• efficiency up to 80%
• EN 62368-1
MODEL input
voltage
output
voltage
output
current
output
power
ripple
and noise2
eciency
typ
(Vdc)
range
(Vdc) (Vdc)
min
(mA)
max
(mA)
max
(W)
typ
(mVp-p)
typ
(%)
PDM1-S3-S3-S 3.3 2.97~3.63 3.3 31 303 1 60 72
PDM1-S3-S5-S 3.3 2.97~3.63 5 20 200 1 60 78
PDM1-S3-S9-S 3.3 2.97~3.63 9 11 111 1 60 78
PDM1-S3-S12-S 3.3 2.97~3.63 12 9 84 1 60 78
PDM1-S3-S15-S 3.3 2.97~3.63 15 7 67 1 60 78
PDM1-S3-D5-S 3.3 2.97~3.63 ±5 ±10 ±100 1 60 78
PDM1-S3-D12-S 3.3 2.97~3.63 ±12 ±5 ±42 1 60 78
PDM1-S3-D15-S 3.3 2.97~3.63 ±15 ±4 ±34 1 60 76
PDM1-S5-S3-S 5 4.5~5.5 3.3 31 303 1 60 74
PDM1-S5-S5-S15 4.5~5.5 5 20 200 1 60 80
PDM1-S5-S9-S15 4.5~5.5 9 11 111 1 60 80
PDM1-S5-S12-S15 4.5~5.5 12 9 84 1 60 80
PDM1-S5-S15-S15 4.5~5.5 15 7 67 1 60 80
PDM1-S5-S24-S15 4.5~5.5 24 5 42 1 60 80
PDM1-S5-D3-S 5 4.5~5.5 ±3.3 ±15 ±152 1 60 71
PDM1-S5-D5-S15 4.5~5.5 ±5 ±10 ±100 1 60 80
PDM1-S5-D9-S15 4.5~5.5 ±9 ±6 ±56 1 60 80
PDM1-S5-D12-S15 4.5~5.5 ±12 ±5 ±42 1 60 80
PDM1-S5-D15-S15 4.5~5.5 ±15 ±4 ±34 1 60 80
PDM1-S5-D24-S15 4.5~5.5 ±24 ±3 ±21 1 60 80
PDM1-S9-D9-S 9 8.1~9.9 ±9 ±6 ±56 1 60 80
PDM1-S9-D15-S 9 8.1~9.9 ±15 ±4 ±34 1 60 80
PDM1-S12-S3-S 12 10.8~13.2 3.3 31 303 1 60 76
PDM1-S12-S5-S112 10.8~13.2 5 20 200 1 60 80
PDM1-S12-S9-S112 10.8~13.2 9 11 111 1 60 80
PDM1-S12-S12-S112 10.8~13.2 12 9 84 1 60 80
PDM1-S12-S15-S112 10.8~13.2 15 7 67 1 60 80
Notes: 1. UL approved
2. Ripple and noise are measured at 20 MHz BW by “parallel cable” method with 1 μF ceramic and 10 μF electrolytic capacitors on the output.
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CUI Inc │ SERIES: PDM1-S │ DESCRIPTION: DC-DC CONVERTER date 01/18/2021 │ page 2 of 7
PART NUMBER KEY
PDM1 - SXX - XXX -S
Input Voltage Output Voltage Packaging Style
Base Number Output
S = single
D = dual
SIP
MODEL
(CONTINUED)
input
voltage
output
voltage
output
current
output
power
ripple
and noise2
eciency
typ
(Vdc)
range
(Vdc) (Vdc)
min
(mA)
max
(mA)
max
(W)
typ
(mVp-p)
typ
(%)
PDM1-S12-S24-S112 10.8~13.2 24 5 42 1 60 80
PDM1-S12-D3-S 12 10.8~13.2 ±3.3 ±15 ±152 1 60 76
PDM1-S12-D5-S112 10.8~13.2 ±5 ±10 ±100 1 60 80
PDM1-S12-D9-S112 10.8~13.2 ±9 ±6 ±56 1 60 80
PDM1-S12-D12-S112 10.8~13.2 ±12 ±5 ±42 1 60 80
PDM1-S12-D15-S112 10.8~13.2 ±15 ±4 ±34 1 60 80
PDM1-S12-D24-S112 10.8~13.2 ±24 ±3 ±21 1 60 80
PDM1-S15-S5-S 15 13.5~16.5 5 20 200 1 60 80
PDM1-S15-S9-S 15 13.5~16.5 9 11 111 1 60 80
PDM1-S15-S12-S 15 13.5~16.5 12 9 84 1 60 80
PDM1-S15-S15-S 15 13.5~16.5 15 7 67 1 60 80
PDM1-S15-S24-S 15 13.5~16.5 24 5 42 1 60 80
PDM1-S15-D5-S 15 13.5~16.5 ±5 ±10 ±100 1 60 80
PDM1-S15-D9-S 15 13.5~16.5 ±9 ±6 ±56 1 60 80
PDM1-S15-D12-S 15 13.5~16.5 ±12 ±5 ±42 1 60 80
PDM1-S15-D15-S 15 13.5~16.5 ±15 ±4 ±34 1 60 80
PDM1-S15-D24-S 15 13.5~16.5 ±24 ±3 ±21 1 60 80
PDM1-S24-S3-S 24 21.6~26.4 3.3 31 303 1 60 74
PDM1-S24-S5-S124 21.6~26.4 5 20 200 1 60 80
PDM1-S24-S9-S124 21.6~26.4 9 11 111 1 60 80
PDM1-S24-S12-S124 21.6~26.4 12 9 84 1 60 80
PDM1-S24-S15-S124 21.6~26.4 15 7 67 1 60 80
PDM1-S24-S24-S124 21.6~26.4 24 5 42 1 60 80
PDM1-S24-D5-S124 21.6~26.4 ±5 ±10 ±100 1 60 80
PDM1-S24-D9-S124 21.6~26.4 ±9 ±6 ±56 1 60 80
PDM1-S24-D12-S124 21.6~26.4 ±12 ±5 ±42 1 60 80
PDM1-S24-D15-S124 21.6~26.4 ±15 ±4 ±34 1 60 80
PDM1-S24-D24-S124 21.6~26.4 ±24 ±3 ±21 1 60 80
Notes: 1. UL approved
2. Ripple and noise are measured at 20 MHz BW by “parallel cable” method with 1 μF ceramic and 10 μF electrolytic capacitors on the output.
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CUI Inc │ SERIES: PDM1-S │ DESCRIPTION: DC-DC CONVERTER date 01/18/2021 │ page 3 of 7
INPUT
parameter conditions/description min typ max units
operating input voltage
3.3 Vdc input models
5 Vdc input models
9 Vdc input models
12 Vdc input models
15 Vdc input models
24 Vdc input models
2.97
4.5
8.1
10.8
13.5
21.6
3.3
5
9
12
15
24
3.63
5.5
9.9
13.2
16.5
26.4
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
surge voltage
for maximum of 1 second
3.3 Vdc input models
5 Vdc input models
9 Vdc input models
12 Vdc input models
15 Vdc input models
24 Vdc input models
-0.7
-0.7
-0.7
-0.7
-0.7
-0.7
5
9
12
18
21
30
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
lter capacitance lter
OUTPUT
parameter conditions/description min typ max units
line regulation
for Vin change of 1%
3.3 Vdc output models
all other models
±1.5
±1.2
%
%
load regulation
measured from 10% load to full load
3.3 Vdc output models
5 Vdc output models
9 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
18
12
9
8
7
6
%
%
%
%
%
%
voltage accuracy see tolerance envelope curve
switching frequency 100% load, nominal input voltage 100 kHz
temperature coecient 100% load ±0.03 %/°C
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection1
3.3 Vdc input single output models, 24 Vdc input
single/dual output models, PDM1-S5-S24-S,
PDM1-S5-D24-S, PDM1-S3-D15-S
all other models: continuous, auto recovery
1 s
Notes: 1. The supply voltage must be discontinued at the end of the short circuit duration
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
isolation voltage input to output, for 1 minute at 1 mA max. 1,500 Vdc
isolation resistance input to output at 500 Vdc 1,000 MΩ
isolation capacitance input to output at 100Khz/0.1V 20 pF
safety approvals2certied to 62368-1: EN
certied to 60950-1: UL
conducted emissions CISPR32/EN55032 class B (external circuit required, see Figure 1)
radiated emissions CISPR32/EN55032 class B (external circuit required, see Figure 1)
ESD IEC/EN61000-4-2, class B, contact ± 8kV for single outputs
IEC/EN61000-4-2, class B, contact ± 6kV for dual outputs
MTBF as per MIL-HDBK-217F at 25°C 3,500,000 hours
RoHS yes
Notes: 2. See specic models noted on pages 1 and 2
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CUI Inc │ SERIES: PDM1-S │ DESCRIPTION: DC-DC CONVERTER date 01/18/2021 │ page 4 of 7
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curve -40 105 °C
storage temperature -55 125 °C
storage humidity non-condensing 95 %
temperature rise Ta = 25°C 25 °C
SOLDERABILITY
parameter conditions/description min typ max units
hand soldering 1.5 mm from case for 10 seconds 300 °C
wave soldering see wave soldering prole 260 °C
MECHANICAL
parameter conditions/description min typ max units
dimensions 19.50 x 6.00 x 9.30 (0.768 x 0.236 x 0.366 inch) mm
case material epoxy resin (UL94-V0)
weight 2.4 g
MECHANICAL DRAWING
10 Sec. Max.
Wave Soldering Time
4 Sec. Max.
Peak Temp. 260°C Max.
Time (sec.)
Temperature (°C)
250
200
150
100
50
0
Top View
PCB Layout
Grid Size: 2.54mm x 2.54mm
Side View
Bottom View
Front View
PIN CONNECTIONS
PIN Single Output Dual Output
1 Vin Vin
2 GND GND
4 0V -Vo
5 No Pin 0V
6+Vo +Vo
units: mm[inch]
tolerance: ±0.25[±0.010]
pin section tolerance: ±0.10[±0.004]
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CUI Inc │ SERIES: PDM1-S │ DESCRIPTION: DC-DC CONVERTER date 01/18/2021 │ page 5 of 7
EMC RECOMMENDED CIRCUIT
Recommended external circuit
components
Vin
(Vdc) C1 CY LDM
3.3 4.7μF/50V -- 6.8μH
54.7μF/50V -- 6.8μH
94.7μF/50V -- 6.8μH
12 4.7μF/50V -- 6.8μH
15 4.7μF/50V 1nF/2KV 6.8μH
24 4.7μF/50V 1nF/2KV 6.8μH
Vin
GND
+Vo
-Vo
(0V)
DC/DC
LO
AD
LDM
C1
Vin
GN
D
Cout
CY
DERATING CURVES
Rated Output Voltage
Output Current Percentage (%)
(Nominal Input Voltage)
Tolerance Envelope Curve
(all other models)
Output Voltage Accuracy (%)
10 20 40 60 80 100
10
0
5
-5
Rated Output Voltage
1.0
-7.5
-15
Output Current Percentage (%)
(Nominal Input Voltage)
Tolerance Envelope Curve
(3.3 Vdc output only)
Output Voltage Accuracy (%)
Typical Load Line
-10
-15
10 20 40 60 80 100
10
0
5
-5
2.5
-2.5
Typical Load Line
-10
-15
-7.5
Max
Max
Min
Min
Figure 1 Table 1
10 20 30 40 50 60 70 80 90 100
10
-10
0
2.5
5
7.5
-2.5
-5
-7.5
Typical Load Line
Rated Output Voltage
2.5
-2.5
-7.5
Output Current Percentage (%)
(Nominal Input Voltage)
Tolerance Envelope Curve
Output Voltage Accuracy (%)
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 020406085 105 120
Temperature Derating Curve
Safe operating area
Note: 1. See Table 2 for Cout values.
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CUI Inc │ SERIES: PDM1-S │ DESCRIPTION: DC-DC CONVERTER date 01/18/2021 │ page 6 of 7
1. Output load requirement
To ensure this module can operate eciently and reliably, the minimum output load may not be less than 10% of the full load during
operation. If the actual output power is low, connect a resistor at the output end in parallel to increase the load.
2. Recommended circuit
If you want to further decrease the input/output ripple, you can increase the capacitance accordingly or choose capacitors with low
ESR (see Figure 2 & Table 2). However, the capacitance of the output lter capacitor must be appropriate. If the capacitance is too
high, a startup problem might arise. For every channel of the output, to ensure safe and reliable operation, the maximum capacitance
must be less than the maximum capacitive load (see Table 3).
APPLICATION NOTES
Note: 1. Operation under minimum load will not damage the converter; however, they may not meet all specications listed.
2. Max. capacitive load tested at input voltage range and full load.
3. All specications measured at: Ta=25°C, humidity<75%, nominal input voltage and rated output load, unless otherwise specied.
Single Vout
(Vdc)
Max. Capacitive Load
(μF)
Dual Vout
(Vdc)
Max. Capacitive Load1
(μF)
3.3 220 3.3 100
5 220 5 100
9 220 9 100
12 220 12 100
15 220 15 100
24 220 24 100
Figure 2
Vin
GN D
+Vo
0V
DC
Cin
DC
Cout
Cout
-Vo
Dual Output
Single Ou tput
Vin
GN D
+Vo
0V
DC
Cin
DC
Cout
Table 2
Vin
(Vdc)
Cin
(µF)
Single Vo
(Vdc)
Cout
(µF)
Dual Vo
(Vdc)
Cout
(µF)
3.3 4.7 3.3 10 ±3.3 4.7
5 4.7 5 10 ±5 4.7
9 2.2 9 2.2 ±9 1
12 2.2 12 2.2 ±12 1
15 2.2 15 1 ±15 0.47
24 1 24 1 ±24 0.47
Note: It’s not recommended to connect any external capacitors in
applications with less than 0.5 watt output.
Table 3
Note: 1. For each output.
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CUI Inc │ SERIES: PDM1-S │ DESCRIPTION: DC-DC CONVERTER date 01/18/2021 │ page 7 of 7
CUI oers a two (2) year limited warranty. Complete warranty information is listed on our website.
CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is
assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a
life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to aect its safety or eectiveness.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 03/18/2013
1.01 added models, added UL approval to some models 11/14/2014
1.02 added UL approval to some models 02/10/2015
1.03 updated tolerance envelope curves 09/12/2018
1.04 safeties updated in features and safety line 01/18/2021
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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