www.murata-ps.com
LSN2 Series
Non-isolated, DOSA-SIP, 6/10/16A
Selectable-Output DC/DC Converters
ORDERING GUIDE SUMMARY
Model
LSN2-T/6-W3
LSN2-T/6-D12
LSN2-T/10-W3
LSN2-T/10-D12
LSN2-T/16-W3
LSN2-T/16-D12
V
OUT
Range
0.75-3.3V
0.75-5V
0.75-3.3V
0.75-5V
0.75-3.3V
0.75-5V
I
OUT
Range
0-6A
0-6A
0-10A
0-10A
0-16A
0-16A
V
IN
Range
2.4-5.5V
8.3-14V
2.4-5.5V
8.3-14V
2.4-5.5V
8.3-14V
Ripple/Noise
15mVp-p
15mVp-p
15mVp-p
30mVp-p
25mVp-p
30mVp-p
Efficiency
94%
93%
95%
95%
95%
94%
Typical Unit
INPUT CHARACTERISTICS
Parameter
Voltage Range
Typ. @ 25°C, full load
2.4-5.5 or 8.3-14V
4.22 to 11.12A
Included
60mA
Positive or negative polarity
Notes
5V or 12V nominal models
Model dependent
With autorestart hysteresis
Output is short circuited
Default polarity is positive
FEATURES
■
Current, full power
Undervoltage Shutdown
Short Circuit Current
Remote On/Off Control
OUTPUT CHARACTERISTICS
Parameter
Voltage
Current
Power Dissipation
Accuracy
Ripple & Noise
Line and Load Regulation
Overcurrent Protection
Overtemperature Protection
Efficiency (minimum)
Efficiency (typical)
GENERAL SPECIFICATIONS
Parameter
Transient Response
Operating Temperature Range
Safety (designed to meet)
EMI (designed to meet)
MECHANICAL CHARACTERISTICS
6 Amp output models
10 & 16 Amp models
User-selectable outputs: 0.75-5V
(D12 models) or 0.75-3.3V (W3 models)
6, 10 or 16A maximum output current
Double lead free to RoHS standards
Selectable phased start-up sequencing
and tracking
Wide range V
IN
8.3-14V or 2.4-5.5V
Up to 52 Watts total output power
Very high efficiency up to 95%
Starts up into pre-biased load
Fast settling, high di/dt I
OUT
slew rate
■
■
■
Typ. @ 25°C, full load
0.75-3.3 or 0.75-5V
0-6, 0-10 or 0-16A
20, 33, 52W max.
±2% of V
NOM
15-75mVpp
±0.03%
Hiccup autorecovery
+115°C shutdown
92-93%
94-95%
Notes
User adjustable, model dependent
Three ranges, model dependent
Three values, model dependent
50% load
Model dependent
Continuous short circuit protection
Model dependent
Model dependent
■
■
■
■
■
PRODUCT OVERVIEW
These miniature point-of-load (POL) switching
DC/DC converters are ideal regulation and supply
elements for distributed power and intermedi-
ate bus architectures. Fully compatible with
the Distributed-power Open Standards Alliance
specification (www.dosapower.com), LSN2’s can
power CPU’s, programmable logic and mixed-
voltage systems with little heat and low noise. A
typical application uses a master isolated 12 or
5Vdc supply and individual LSN2 converters for
local 1.8 and 3.3Vdc supplies. All system isolation
resides in the central supply, leaving lower cost
POL regulation at the load. The LSN2’s can deliver
very high power (to 52 Watts) in a tiny area with-
out heat sinking or external components. They
feature quick transient response (to 25μsec) and
very fast current slew rates (to 20A/μsec).
Typ. @ 25°C, full load
25μsec
–40 to +85°C
UL/IEC/EN 60950-1
FCC pt.15, class B
Notes
50% load step to 2% of final value
With 200 lfm airflow
And CSA C22.2-No.234
May need external filter
0.50 x 1.00 x 0.275 inches (12.7 x 25.4 x 6.98 mm)
0.50 x 2.00 x 0.32 inches (12.7 x 50.8 x 8.13 mm)
Pb
Lead-free
construction/attach
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN2.B06
Page 1 of 15
LSN2 Series
Non-isolated, DOSA-SIP, 6/10/16A
Selectable-Output DC/DC Converters
PERFORMANCE SPECIFICATIONS AND ORDERING GUIDE
c
Output
Root Model
i
LSN2-T/6-W3
LSN2-T/6-D12
LSN2-T/10-W3
LSN2-T/10-D12
LSN2-T/16-W3
LSN2-T/16-D12h
LSN2-T/30-D12
V
OUT
(Volts)
0.75-3.3
0.75-5
0.75-3.3
0.75-5
0.75-3.3
0.75-5
0.8-5
I
OUT
(Amps)
6
6
10
10
16
16
30
Power
(Watts)
19.8
30
33.0
50
52.8
80
150
R/N (mVp-p)
d
Typ.
25
15
15
30
25
30
Max.
40
25
25
75
50
75
Regulation
e
Line
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
Load
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.075% ±0.055%
V
IN
Nom.
(Volts)
5
12
5
12
5
12
Input
Range
g
(Volts)
2.4-5.5
8.3-14
2.4-5.5
8.3-14
2.4-5.5
8.3-14
I
IN
f
(mA/A)
50/4.2
70/2.69
50/6.95
100/4.39
50/11.12
100/7.1
Efficiency
Min.
93.1%
90%
93%
93%
93%
92%
Typ.
94.3%
93%
95%
95%
95%
94%
Package
(Case/
Pinout)
B12, P69
B12, P69
B11, P68
B11, P68
B11, P68
B11, P68
Please refer to the separate LSN2-T/30 data sheet.
➂
These devices have no minimum-load requirements and will regulate under no-load conditions. Regula-
tion specifications describe the output-voltage deviation as the line voltage or load is varied from its
nominal/midpoint value to either extreme.
➃
Nominal line voltage, no-load/full-load conditions.
➄
V
IN
must be
t0.5V
greater than V
OUT
.
➅
LSN2-TXX-D12 efficiencies are shown at 5V
OUT
.
➆
These are not complete model numbers. Please refer to the Part Number Structure when ordering.
➀
Typical at T
A
= +25°C under nominal line voltage and full-load conditions, unless noted. All models
are tested and specified with external 22μF tantalum input and output capacitors. These capacitors
are necessary to accommodate our test equipment and may not be required to achieve specified
performance in your applications. See I/O Filtering and Noise Reduction. “Nominal” output is 3.3V
(W3 models) or 5V (D12 models)
➁
Ripple/Noise (R/N) is tested/specified over a 20MHz bandwidth and may be reduced with external
filtering. See I/O Filtering and Noise Reduction for details.
PART NUMBER STRUCTURE
L SN2
-
T
/
16
-
D12 N G
-
C
Output Configuration:
L
= Unipolar
Low Voltage
RoHS-6 hazardous substance compliant
➂
These devices have no minimum-load requirements and will regu-
late under no-load conditions. Regulation specifications describe
the output-voltage deviation as the line voltage or load is varied
from its nominal/midpoint value to either extreme.
➃
Nominal line voltage, no-load/full-load conditions.
➄
V
IN
must be
t0.5V
greater than V
OUT
.
➅
LSN2-TXX-D12 efficiencies are shown at 5V
OUT
.
➆
These are not complete model numbers. Please refer to the
Part Number Structure when ordering.
Power Good Output:
Blank
= Omitted
G
= Installed
On/Off Polarity:
Blank
= Positive polarity
N
= Negative polarity
Non-Isolated Through-hole
Nominal Output Voltage:
0.75-3.3 Volts (W3)
0.75-5 Volts (D12)
Maximum Rated Output:
Current in Amps
Input Voltage Range:
D12
= 8.3-14 Volts (12V nominal)
W3
= 2.4-5.5 Volts (5V nominal)
Note:
Some model number combinations may
not be available. Contact Murata Power
Solutions for further information.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN2.B06
Page 2 of 15
LSN2 Series
Performance/Functional Specifications
(1)
INPUT
Input Voltage Range
Isolation
Start-Up Threshold
W3 Models
12V Models
Undervoltage Shutdown
W3 Models
12V Models
Overvoltage Shutdown
Reflected (Back) Ripple Current
(2)
Internal Input Filter Type
Reverse Polarity Protection
Input Current:
Full Load Conditions
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output Short Circuit
No Load
W3 models
12V models
Low Line (V
IN
= V
MIN
)
LSN2-T/6-W3
LSN2-T/6-D12
LSN2-T/10-W3
LSN2-T/10-D12
LSN2-T/16-W3
LSN2-T/16-D12
Remote On/Off Control:
(5)
Positive Logic (no model suffix)
Negative Logic (“N” model suffix)
Current
See Ordering Guide
Not isolated, input and output commons
are internally connected
2.2 Volts
8 Volts
2.0 Volts
7.5 Volts
None
10-70mAp-p (model dependent)
Capacitive
See fuse information
See Ordering Guide
0.1A
2
sec
5mA
60mA
50mA
100mA
5.54 Amps
3.85 Amps
9.14 Amps
6.31 Amps
14.63 Amps
10.2 Amps
OFF = ground pin to +0.8V max.
ON = open pin or +2.5V min. to +V
IN
max.
ON = open pin to +0.3V max.
OFF = +2.5V min. to +V
IN
max.
1mA max.
OUTPUT
Voltage Output Range
Minimum Loading
Accuracy
(50% load)
Voltage Adjustment Range
(13)
Temperature Coefficient
Ripple/Noise
(20 MHz bandwidth)
Efficiency
Maximum Capacitive Loading:
(15)
LSN2-T/6 models:
Cap-ESR = 0.001 to 0.01:
Cap-ESR >0.01:
LSN2-T/10 and -T/16 models:
Cap-ESR = 0.001 to 0.01:
Cap-ESR >0.01:
See Ordering Guide
No minimum load
±2% of V
NOM
See Ordering Guide
±0.02% of V
OUT
range per °C
See Ordering Guide and
(8)
See Ordering Guide
Outline Dimensions
Removable Heat Shield
Pin Material
Weight
3000μF
5000μF
5000μF
10,000μF
Electromagnetic Interference
(conducted and radiated)
Safety
Flammability Rating
Non-isolated, DOSA-SIP, 6/10/16A
Selectable-Output DC/DC Converters
Current Limit Inception:
(98% of V
OUT
)
LSN2-T/6 models
11-13 Amps (cold startup)
11 Amps (after warm up)
LSN2-T/10 models
18.75 Amps (cold startup)
16.75 Amps (after warm up)
LSN2-T/16 models
24 Amps (cold startup)
21 Amps (after warm up)
Short Circuit Mode
(6)
Short Circuit Current Output
Protection Method (17)
Short Circuit Duration
Prebias Startup
(16)
Sequencing
Slew Rate
Startup delay until sequence start
Tracking accuracy, rising input
Tracking accuracy, falling input
Sequence pin input impedance
Remote Sense to V
OUT
Power Good Output
(14)
(“G” suffix)
Power_Good Configuration
600mA
Hiccup autorecovery on overload removal
Continuous, no damage (output shorted
to ground)
Converter will start up if the external
output voltage is less than V
NOM
2V max. per millisecond
10 milliseconds
V
OUT
= ±100mV of Sequence In
V
OUT
= ±200mV of Sequence In
400k: to 1M:
0.5V max. (7)
TRUE (OK) = open drain
FALSE (not OK) = Signal Ground to 0.4V
MOSFET to ground with external user
pullup, 10mA max. sink
DYNAMIC CHARACTERISTICS
Dynamic Load Response
25μsec to ±2% of final value
(50-100-50% load step, di/dt = 20A/msec)
Start-Up Time
Switching Frequency
LSN2-T/6 models
LSN2-T/10 and -T/16 models
4-7msec for V
OUT
= nominal
(V
IN
on to V
OUT
regulated or On/Off to V
OUT
)
315kHz
230kHz
ENVIRONMENTAL
Calculated MTBF
(4)
TBC Hours
Operating Temperature Range
(Ambient)
No derating, natural convection
–40 to +63°C, vertical mount, 2.5V
OUT
(9)
With derating
See Derating Curves
Operating PC Board Temperature
–40 to +100°C max. (12)
Storage Temperature Range
Thermal Protection/Shutdown
Relative Humidity
–55 to +125°C
+115°C
To +85% / +85°C
PHYSICAL
See Mechanical Specifications
Nylon 46
Tin-plated copper alloy
0.28 ounces (7.8 grams)
FCC part 15, class B, EN55022
(may need external filter)
UL/cUL 60950-1, CSA-C22.2 No.234
IEC/EN 60950-1
UL94V-0
Line/Load Regulation
(See Tech Notes) See Ordering Guide and
(10)
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN2.B06
Page 3 of 15
LSN2 Series
Non-isolated, DOSA-SIP, 6/10/16A
Selectable-Output DC/DC Converters
PERFORMANCE/FUNCTIONAL SPECIFICATION NOTES
All models are tested and specified with external 1 || 10μF ceramic/tantalum output capacitors and
a 22μF external input capacitor. All capacitors are low ESR types. These capacitors are necessary
to accommodate our test equipment and may not be required to achieve specified performance in
your applications. All models are stable and regulate within spec under no-load conditions.
General conditions for Specifications are +25°C, V
IN
= nominal, V
OUT
= nominal, full load. “Nominal”
output voltage is +5V for D12 models and +3.3V for W3 models.
(2)
Input Back Ripple Current is tested and specified over a 5-20MHz bandwidth. Input filtering is
C
IN
= 2 x 100μF tantalum, C
BUS
= 1000μF electrolytic, L
BUS
= 1μH.
(3)
Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At
higher temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs
if the total RMS current over time does not exceed the derating curve.
(4)
Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3,
ground fixed conditions, T
PCBOARD
= +25°C, full output load, natural air convection.
(5)
The On/Off Control may be driven with external logic or by applying appropriate external voltages
which are referenced to –Input Common. The On/Off Control Input should use either an open
collector/open drain transistor or logic gate which does not exceed +V
IN
. A 68K: external pullup
resistor to +V
IN
will cause the “ON” state for negative logic models.
(6)
Short circuit shutdown begins when the output voltage under increasing load degrades approxi-
mately 2% from the selected setting.
(7)
If Sense is connected remotely at the load, up to 0.5 Volts difference is allowed between the Sense
and +V
OUT
pins to compensate for ohmic voltage drop in the power lines. A larger voltage drop may
cause the converter to exceed maximum power dissipation.
(8)
Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise Reduction.
(9)
All models are fully operational and meet published specifications, including “cold start” at –40°C.
V
OUT
is nominal.
(10)
Regulation specifications describe the deviation as the line input voltage or output load current is
varied from a nominal midpoint value to either extreme.
(11)
Other input or output voltage ranges are available under scheduled quantity special order.
(12)
Maximum PC board temperature is measured with the sensor in the center.
(13)
Do not exceed maximum power specifications when adjusting the output trim.
(14)
When Sequencing is not used, the Power Good output is TRUE at any time the output is within
approximately ±10% of the voltage set point. Power Good basically indicates if the converter is in
regulation. Power Good detects Over Temperature if the PWM has shut down due to OT. Power
Good does not directly detect Over Current.
If Sequencing is in progress, Power Good will falsely indicate TRUE (valid) before the output
reaches its setpoint. Ignore Power Good if Sequencing is in transition.
(15)
The maximum output capacitive loads depend on the the Equivalent Series Resistance (ESR) of
the external output capacitor.
(16)
Do not use Pre-bias startup and sequencing together. See Technical Notes below.
(17)
After short circuit shutdown, if the load is partially removed such that the load still exceeds the
overcurrent (OC) detection, the converter will remain in hiccup restart mode.
(18)
For best noise performance, leave the Track/Sequence pin OPEN when not used.
(1)
ABSOLUTE MAXIMUM RATINGS
Input Voltage
(Continuous or transient)
W3 models
12V models
On/Off Control
Input Reverse Polarity Protection
Output Current
(7)
Storage Temperature
Lead Temperature
+7 Volts
+15 Volts
–0.3V min. to +V
IN
max.
See Fuse section
Current-limited. Devices can
withstand sustained short circuit
without damage.
–55 to +125°C
See soldering guidelines
These are stress ratings. Exposure of devices to greater than any of these conditions may
adversely affect long-term reliability. Proper operation under conditions other than those listed in
the Performance/Functional Specifications Table is not implied.
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these
converters. These specifications vary depending on the solder type. Exceeding these
specifications may cause damage to the product. Be cautious when there is high atmo-
spheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your
production environment may differ; therefore please thoroughly review these guidelines
with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
For Sn/Pb based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
105° C.
250° C.
6 seconds
115° C.
270° C.
7 seconds
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN2.B06
Page 4 of 15
LSN2 Series
Non-isolated, DOSA-SIP, 6/10/16A
Selectable-Output DC/DC Converters
Figure 1. LSN2 Series Simplified Schematic
Typical topology is shown
TECHNICAL NOTES
I/O Filtering and Noise Reduction
All models in the LSN2 Series are tested and specified with external 1 || 10μF
ceramic/tantalum output capacitors and a 22μF tantalum input capacitor.
These capacitors are necessary to accommodate our test equipment and
may not be required to achieve desired performance in your application. The
LSN2's are designed with high-quality, high-performance internal I/O caps,
and will operate within spec in most applications with no additional external
components.
In particular, the LSN2's input capacitors are specified for low ESR and are
fully rated to handle the units' input ripple currents. Similarly, the internal out-
put capacitors are specified for low ESR and full-range frequency response.
In critical applications, input/output ripple/noise may be further reduced using
filtering techniques, the simplest being the installation of external I/O caps.
External input capacitors serve primarily as energy-storage devices. They
minimize high-frequency variations in input voltage (usually caused by IR
drops in conductors leading to the DC/DC) as the switching converter draws
pulses of current. Input capacitors should be selected for bulk capacitance
(at appropriate frequencies), low ESR, and high rms-ripple-current ratings.
The switching nature of modern DC/DCs requires that the dc input voltage
source have low ac impedance at the frequencies of interest. Highly inductive
source impedances can greatly affect system stability. Your specific system
configuration may necessitate additional considerations.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN2.B06
Page 5 of 15
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