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s
ULE Series
Isolated, High Density, Eighth-Brick
1.25–20 Amp, DC-DC Converters
Typical unit
The ULE Series "Eighth-Brick" DC-DC Converters are high-current isolated
power converters designed for use in high-density system boards.
FEATURES
compliant
RoHS
1/8-brick package, 1/4-brick pinout
New
in through-hole or SMT version
x 2.22 x 0.36 in. (22.6 x 56.4 x 9.1mm)
0.89
Output current: 1.25-20 Amps
Output voltages: 1.5V to 48V
voltage: 12V, 24V and 48V nominal
Input
Interleaved, synchronous-rectifier
topology delivers:
Outstanding efficiency (to 94%)
Low noise
Stable no-load operation
No output reverse conduction
Excellent thermal performance
On/off control, trim and sense pins
isolated (2250Vdc BASIC)
Fully
I/O protected; Thermal shutdown
Fully
ed to UL/IEC/EN 60950-1 and CAN/CSA
Certifi
C22.2 No.60950-1, 2nd edition
Lead-free construction/attach
PRODUCT OVERVIEW
Measuring just 0.89 × 2.22 × 0.36 inches (22.6
× 56.4 × 9.1mm), these open-frame, low-profile
E-bricks fit the industry-standard quarter-brick
footprint. Now you can “cut-and-paste” the layout
from your last Q-brick design to save time and save
44% board space (1.86 square inches versus 3.3)
in the process.
From a 9-18V, 18-36V or 36-75V input, ULEs
deliver 1.5 to 48 Volt outputs with current up to
20 Amps. They employ an interleaved, synchro-
nous-rectifier topology that exploits 100% of their
duty cycle. They simultaneously achieve high
efficiency, low noise, tight line/load regulation, and
quick step response.
An open-frame design, high efficiency, low-on-
resistance FETs, and planar magnetics embedded
in heavy-copper pc boards all contribute to
impressive thermal derating. The ULEs feature set
includes high isolation (2250Vdc, 48V models),
input pi filters, input undervoltage shutdown,
output overvoltage protection, current limiting,
short-circuit protection, and thermal shutdown. The
standard footprint carries V
OUT
trim, on/off control,
and sense pins (sense pins are not available on
12V or higher models).
All ULE E-Bricks are certified to the BASIC-
insulation requirements of UL/EN/IEC60950-1,
2nd edition, and all “D48” models (36-75V input
ranges) carry the CE mark. Safety certifications,
EMC compliance testing and qualification testing
are available.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_ULE Series.H03
Page 1 of 28
ULE Series
Isolated, High Density, Eighth-Brick
1.25–20 Amp, DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
V
OUT
(V)
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
3.3
3.3
3.3
3.3
5
5
5
5
5
12
12
12
12
24
48
48
Model Family
ULE-1.5/20-D24xx-C
ULE-1.5/20-D48xx-C
ULE-1.8/20-D24xx-C
ULE-1.8/20-D48xx-C
ULE-2.5/20-D24xx-C
ULE-2.5/20-D48xx-C
ULE-3.3/20-D12x-C
ULE-3.3/20-D12xM-C
ULE-3.3/20-D24x-C
ULE-3.3/20-D24xM-C
ULE-3.3/20-D48x-C
ULE-3.3/20-D48xM-C
ULE-5/10-D12x-C
ULE-5/12-D24x-C
ULE-5/12-D24xM-C
ULE-5/12-D48x-C
ULE-5/12-D48xM-C
ULE-12/4.2-D24x-C
ULE-12/4.2-D24xM-C
ULE-12/4.2-D48x-C
ULE-12/4.2-D48xM-C
ULE-24/3-D48x-C
ULE-48/1.25-D48x-C
ULE-48/1.25-D48xM-C
I
OUT
(A)
20
20
20
20
20
20
20
20
20
20
20
20
10
12
12
12
12
4.2
4.2
4.2
4.2
3
1.25
1.25
Input
I
IN
no
V
IN
Power R/N (mVp-p)
Regulation (Max.) Nom. Range load
(W)
Typ.
Max.
Line
Load
(V)
(V)
(mA)
30
30
36
36
50
50
66
66
66
66
66
66
50
60
60
60
60
50.4
50.4
50.4
50.4
72
60
60
25
25
40
40
30
50
60
60
50
50
50
50
60
50
50
50
50
50
50
50
50
400
640
640
60
60
80
80
50
75
100
100
80
80
100
100
125
100
100
100
100
150
150
150
150
700
750
750
±0.15% ±0.15%
±0.15% ±0.15%
±0.1%
±0.1%
24
48
24
48
24
48
12
12
24
24
48
48
12
24
24
48
48
24
24
48
48
48
48
48
18-36
36-75
18-36
36-75
18-36
36-75
9-18
9-18
18-36
18-36
36-75
36-75
9-18
19-36
19-36
36-75
36-75
18-36
18-36
36-75
36-75
36-75
36-75
36-75
40
40
40
40
95
55
100
100
60
60
60
60
160
160
160
90
90
55
55
55
55
45
75
75
Output
Efficiency
I
IN
full
load
(A)
1.42
0.74
1.72
0.87
2.35
1.17
6.15
6.15
3.09
3.09
1.54
1.54
4.63
2.78
2.78
1.38
1.38
2.31
2.31
1.14
1.14
1.63
1.35
1.35
Min.
86%
84%
85%
84.5%
87%
88%
88.9%
88.9%
88%
88%
87%
87%
87%
88%
88%
88.5%
88.5%
89.5%
89.5%
91%
91%
90.8%
91%
91%
Typ.
88%
84.5%
87%
86.5%
88.5%
89%
89.4%
89.4%
89%
89%
89%
89%
90%
90%
90%
90.5%
90.5%
91%
91%
92%
92%
92%
92.5%
92.5%
±0.25% ±0.25%
±0.05% ±0.05%
±0.05%
±0.1%
±0.05% ±0.05%
±0.05% ±0.05%
±0.05% ±0.05%
±0.05% ±0.05%
±0.1%
±0.1%
±0.25%
±0.25%
±0.05% ±0.05%
±0.1%
±0.1%
±0.1%
±0.1%
±0.25%
±0.25%
±0.25%
±0.25%
±0.05% ±0.075%
±0.05% ±0.075%
±0.05% ±0.075%
±0.05% ±0.075%
±0.3%
±1.25%
±0.175% ±3.2%
±0.175% ±3.2%
Please refer to the full model number structure for additional ordering part numbers and
options.
All specifications are at nominal line voltage and full load, +25ºC unless otherwise noted.
See detailed specifications.
If V
IN
= 19−20V, I
OUT
= 8A Max.
Min. load = 10%.
If V
IN
= 9−10V, I
OUT
= 18A Max.
ULE-1.2/30-D48N-C
ULE-1.2/30-D48P-C
ULE-1.5/20-D24N-C
ULE-1.5/20-D24NM-C
ULE-1.5/20-D24P-C
ULE-1.5/20-D24PM-C
ULE-1.5/20-D48N-C
ULE-1.5/20-D48NM
ULE-1.5/20-D48NM-C
ULE-1.5/20-D48P-C
ULE-1.5/20-D48PM
ULE-1.5/20-D48PM-C
ULE-3.3/20-D48NL1-C
ULE-5/12-D48NL2-C
ULE-1.8/20-D24N-C
ULE-1.8/20-D24NM-C
ULE-1.8/20-D24P-C
ULE-1.8/20-D24PM-C
ULE-1.8/20-D48N-C
ULE-1.8/20-D48NL2-C
ULE-1.8/20-D48NM-C
ULE-1.8/20-D48P
ULE-1.8/20-D48P-C
ULE-1.8/20-D48PM-C
ULE-12/4.2-D24NM-C
ULE-12/4.2-D24PM-C
ULE-3.3/20-D48NL2-C
ULE-12/4.2-D48NM-C
ULE-12/4.2-D48PM-C
ULE-2.5/20-D24N-C
ULE-2.5/20-D24PM
ULE-2.5/20-D24PM-C
ULE-2.5/20-D48N-C
ULE-2.5/20-D48NL2
ULE-2.5/20-D48NM-C
ULE-2.5/20-D48P-C
ULE-2.5/20-D48PM
ULE-2.5/20-D48PM-C
ULE-3.3/20-D12NM-C
ULE-3.3/20-D48PL1-C
ULE-3.3/20-D12PM
ULE-3.3/20-D12PM-C
ULE-3.3/20-D24PM-C
ULE-3.3/20-D48NM-C
ULE-3.3/20-D48PM-C
ULE-31103
ULE-31104
ULE-31106
ULE-31131-C
ULE-31131-Y
ULE-31199-C
ULE-12/4.2-D48NL2-C
ULE-3.3/20-D48PL2-C
ULE-48/1.25-D48NM-C
ULE-48/1.25-D48PM-C
ULE-5/10-D12N-C
ULE-5/10-D12NM
ULE-5/10-D12NM-C
ULE-5/10-D12P-C
ULE-5/10-D12PM-C
ULE-5/12-D24PM
ULE-5/12-D24PM-C
ULE-5/12-D48NM-C
ULE-5/12-D48PM-C
ULE-12/4.2-D48PL1-C
ULE-5/12-D48NL1-C
www.murata-ps.com/support
MDC_ULE Series.H03
Page 2 of 28
ULE Series
Isolated, High Density, Eighth-Brick
1.25–20 Amp, DC-DC Converters
PART NUMBER STRUCTURE
U LE
-
1.5
/
20
-
D48 N M Lx
-
C
Output Configuration:
U = Unipolar/Single Output
RoHS-6 hazardous substance compliant
Does not claim EU RoHS exemption 7b, lead in solder
Pin Length Option
(Through-hole packages only)
Eighth-Brick Package
Nominal Output Voltage
Blank = standard length 0.180˝ (4.6mm)
L1 = Pin length 0.110±0.010˝ (2.79±0.25mm
➀
L2 = Pin length 0.145±0.010˝ (3.68±0.25mm)
➀
Surface (Gullwing) Mount Package
➁
(ULE-12/4.2-D48, ULE-24/3-D48, and
ULE-48/1.25-D48 have no surface mount option.)
Remote On/Off Control Polarity:
P = Positive polarity (standard for D12 and
D24 models, optional special order for D48 models)
N = Negative polarity (standard for D48 models,
optional special order for D12 and D24 models)
Maximum Rated Output
Current in Amps
Input Voltage Range:
D12 = 12V nominal
D24 = 24V nominal
D48 = 48V nominal
➀
Special quantity order is required; samples available with standard pin length only.
➁
SMT (M) versions not available in sample quantities.
➂
Some model number combinations may not be available. See website or contact your local Murata sales representative.
www.murata-ps.com/support
MDC_ULE Series.H03
Page 3 of 28
ULE Series
Isolated, High Density, Eighth-Brick
1.25–20 Amp, DC-DC Converters
FUNCTIONAL SPECIFICATIONS
INPUT CHARACTERISTICS
Load Current
Remote On/Off Control
Under Reflected
Inter-
Start-up Voltage (back)
Full
Inrush
nal Reverse
Positive
Negative
threshold Shut- Ripple
Load Transient Output
Low Standby Input Polarity Cur-
Logic
Logic
Min.
down Current Condi- Conditions Short No Load Line Mode Filter Protec- rent
“P” model
“N” model
Model Family
(V)
(V)
(mA)
tions (A
2
sec) Circuit (mA) (A) (mA) Type tion (mA)
suffix
suffix
ULE-1.5/20-D24
ULE-1.5/20-D48
ULE-1.8/20-D24
ULE-1.8/20-D48
ULE-2.5/20-D24
ULE-2.5/20-D48
ULE-3.3/20-D12
ULE-3.3/20-D24
ULE-3.3/20-D48
ULE-5/10-D12
ULE-5/12-D24
ULE-5/12-D48
ULE-12/4.2-D24
ULE-12/4.2-D48
ULE-24/3-D48
ULE-48/1.25-D48
17.0
34.0
17.0
33.0
17.0
33.0
8.5
17.0
34.5
8.5
19.0
34.5
17.0
35.0
35.0
35.0
16.0
33.0
16.0
31.0
16.0
32.0
8.0
See
16.0 15−45,
model Ordering
33.5 dependent Guide
8.0
17.5
33.5
16.0
34.0
33.0
33.5
0.5−1
1.96
0.98
2.3
1.16
3.23
1.55
7.42
40−250 40−160
1−8
model model 4.10 model
depen- depen- 2.05 depen-
dent
dent
dent
6.14
3.30
1.82
3.04
1.51
2.17
1.46
150
6-90
150
6-90
OFF=Ground pin OFF=open or 6-90, model
None,
to +0.8V max.
+3.5V to
dependent
install
+13.5V max.
1.0
ON=open or
external
3.5V to +13.5V ON=Ground pin
fuse
to +0.8V max.
max.
6-90, model
dependent
Start-up Time
V
IN
to V
OUT
Remote On/Off
regulated to V
OUT
regu-
(Max.)
lated (Max.)
mSec
mSec
L-C
OUTPUT CHARACTERISTICS
Capacitive Loading
V
OUT
Max.
Accuracy Low ESR <0.02Ω Max.
V
OUT
50% Load
resistive load
(V) % of V
NOM
(μF)
1.5
1.5
1.8
1.8
2.5
2.5
3.3
±1 to ±2
3.3 of V
NOM
,
model
3.3
dependent
5
5
5
12
12
24
48
2000
680
470
420 mA
300 mA
No Minimum
none
10,000
−20 to +10%
±0.02% of
of V
NOM
, model
V
OUT
range/°C
dependent
No Minimum
Load
+10%
Current Limit
Inception
98% of V
OUT
after warmup
(A)
24
24
24
25
24
24
24
See Ordering Guide
24
26
13
15
16
6
6.25
4.25
2.5
Model Family
ULE-1.5/20-D24
ULE-1.5/20-D48
ULE-1.8/20-D24
ULE-1.8/20-D48
ULE-2.5/20-D24
ULE-2.5/20-D48
ULE-3.3/20-D12
ULE-3.3/20-D24
ULE-3.3/20-D48
ULE-5/10-D12
ULE-5/12-D24
ULE-5/12-D48
ULE-12/4.2-D24
ULE-12/4.2-D48
ULE-24/3-D48
ULE-48/1.25-D48
Adjustment
Range
Temperature
Coefficient
Minimum
Loading
Ripple/Noise
Remote Sense
(20 MHz
Line/Load
Compensation bandwidth) Regulation
Efficiency
See notes on page 5.
www.murata-ps.com/support
MDC_ULE Series.H03
Page 4 of 28
ULE Series
Isolated, High Density, Eighth-Brick
1.25–20 Amp, DC-DC Converters
ISOLATION CHARACTERISTICS
DYNAMIC CHARACTERISTICS
Model Family
ULE-1.5/20-D24
ULE-1.5/20-D48
ULE-1.8/20-D24
ULE-1.8/20-D48
ULE-2.5/20-D24
ULE-2.5/20-D48
ULE-3.3/20-D12
ULE-3.3/20-D24
ULE-3.3/20-D48
ULE-5/10-D12
ULE-5/12-D24
ULE-5/12-D48
ULE-12/4.2-D24
ULE-12/4.2-D48
ULE-24/3-D48
ULE-48/1.25-D48
Input to
Output
Min.
(V)
Isolation
Resistance
(MΩ)
Isolation
Capacitance
Isolation
(pF)
Safety Rating
Model Family
ULE-1.5/20-D24
ULE-1.5/20-D48
ULE-1.8/20-D24
ULE-1.8/20-D48
Dynamic Load Response
(50-75-50% load step)
100μSec to ±1.5% of final value
100μSec to ±1.5% of final value
100μSec to ±1.5% of final value
100μSec to ±1.5% of final value
150μSec to ±1% of final value
80μSec to ±1.5% of final value
150μSec to ±1.25% of final value
150μSec to ±1.5% of final value
150μSec to ±1% of final value
75μSec to ±2% of final value
75μSec to ±2% of final value
100μSec to ±1% of final value
150μSec to ±1.25% of final value
150μSec to ±1.25% of final value
200μSec to ±2% of final value
200μSec to ±1% of final value
Switching
Frequency
KHz
280±15
280±15
340±15
340±15
385±15
385±45
310±15
385±15
365±15
325±15
450±15
450±15
400±15
380±15
240±30
250±15
1750
ULE-2.5/20-D24
ULE-2.5/20-D48
2000-
2250 min.,
model
dependent
ULE-3.3/20-D12
100
470
Basic
Insulation
ULE-3.3/20-D24
ULE-3.3/20-D48
ULE-5/10-D12
ULE-5/12-D24
ULE-5/12-D48
1750
2000
1500
ULE-12/4.2-D24
ULE-12/4.2-D48
ULE-24/3-D48
ULE-48/1.25-D48
MISCELLANEOUS CHARACTERISTICS
Operating Temperature Range
Calculated
MTBF
See
derating curves
Operating PCB
Storage
Temperature Temperature
(no derating)
Range
Thermal
Protection/
Shutdown
Short
Circuit
Current
3A
3A
3A
3A
3A
3A
+105 to
+125ºC,
model
dependent
300mA
3A
3A
5A
5A
2A
3A
3A
0.65A
500mA
Overvoltage
Protection
12
via magnetic Short Circuit
feedback
Protection Short Circuit
(V)
Method
Duration
16
2.3
2.0
2.3
2.3
3.5
3.0
3.96
3.96
3.96
6.0
6.0
6.4
15.0
14.0
28.0
55.0
Current
limiting,
hiccup
autorestart.
Remove
overload for
recovery
Model Family
ULE-1.5/20-D24
ULE-1.5/20-D48
ULE-1.8/20-D24
ULE-1.8/20-D48
ULE-2.5/20-D24
ULE-2.5/20-D48
ULE-3.3/20-D12
ULE-3.3/20-D24
ULE-3.3/20-D48
ULE-5/10-D12
ULE-5/12-D24
ULE-5/12-D48
ULE-12/4.2-D24
ULE-12/4.2-D48
ULE-24/3-D48*
ULE-48/1.25-D48
Relative
Humidity
TBC
−40 to +85ºC with derating
−40 to
+105ºC
−55 to
+125ºC
Continuous,
output
shorted to
ground.
No damage.
To
+85ºC/85%
non-
condensing
*No derating is required up to 85°C.
See notes on page 5.
www.murata-ps.com/support
MDC_ULE Series.H03
Page 5 of 28
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