Single Output LSN-10A Models
Non-Isolated, 5V
in
,
1-3.8V
out
10 Amp DC/DC In SIP Package
FEATURES
n
Industry-standard SIP pinout
n
Shorter (2.0" vs. 2.5") package length
n
4.5-5.5V input range
n
1/1.2/1.5/1.8/2/2.5/3.3/3.8V
OUT
@ 10A
n
Non-isolated, fully synchronous,
300kHz, buck topology
n
Outstanding performance:
•
±1% setpoint accuracy
•
Efficiencies to 95% @ 10 Amps
•
Noise as low as 10mVp-p
•
Stable no-load operation
•
Trimmable output voltage
n
Remote on/off and sense pins
n
Thermal shutdown
n
derating to +71°C, natural convection
No
n
UL/IEC/EN60950-1 certified
n
compliant
EMC
Typical units
PRODUCT OVERVIEW
Murata Power Solutions' new LSN D5 Series SIP’s
(single-in-line packages) are non-isolated DC/DC
converters that accept a 5V input (4.5V to 5.5V
input range) and deliver 1V, 1.2V, 1.5V, 1.8V, 2V,
2.5, 3.3 or 3.8V outputs at 10 Amps. LSN D5 SIP’s
take on-board 5V power and convert it, with the
highest efficiency in the smallest space, to any
lower voltage required by today’s current-hungry
DSP’s, ASIC’s and CPLD’s.
The miniature size of LSN D5's makes them
ideal for true point-of-use power processing. Ver-
tical-mount packages occupy a mere 0.7 square
inches (440 sq. mm), and they are available in
industry-standard and Tyco-compatible pinout.
Horizontal-mount packages ("H" suffix) are only
0.34 inches (8.6mm) high.
The LSN's best-in-class power density is
achieved with a fully synchronous, fixed-frequency
(300kHz), buck topology that also delivers: high
efficiency (to 95%), low noise (10mVp-p typ.), tight
line/load regulation (±0.1%/±0.25% max.), quick
step response (100µsec), stable no-load operation,
and no output reverse conduction.
The fully functional LSN’s feature output over-
current detection, continuous short-circuit protec-
tion, an output-voltage trim function, a remote on/
off control pin (pull high to disable), thermal shut-
down, and a sense pin. High efficiency enables
the LSN D5's to deliver rated output currents of
10 Amps at ambient temperatures to +71°C with
no air flow (natural convection).
If your low-voltage, high-current requirements
make the use of inefficient linear regulators
impractical, take a look at one of C&D’s easy-to-
use, low-cost LSN SIP’s. All devices are UL/IEC/
EN60950-1 certified and EMC compliant. UL, CB,
HALT and EMC reports are available upon request.
Selected models are RoHS compliant.
For full details go to
www.murata-ps.com/rohs
+INPUT
(7,8)
10.5Ω
220µF
44µF
+OUTPUT
(1,2,4)
47.1µF
(100.1µF)
470µF
(330µF)
+SENSE
➀
(3)
COMMON
(5)
➁
COMMON
(6)
CURRENT
SENSE
➁
V
CC
ON/OFF
CONTROL
(11)
PWM
CONTROLLER
REFERENCE &
ERROR AMP
➀
For devices with the sense-pin removed ("B" suffix), the feedback
path is through the +Output pin and not the +Sense pin.
➁
Values in parenthesis for 3.3V models only.
Typical topology is shown.
TRIM
(10)
Figure 1. Simplified Schematic
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
www.murata-ps.com
MDC_LSN-10A D5 Models.B01 Page 1 of 15
Single Output LSN-10A Models
Non-Isolated, 5V
in
,
1-3.8V
out
10 Amp DC/DC In SIP Package
Performance Specifications and Ordering Guide
➀
Output
Input
Model
➅
LSN-1/10-D5
LSN-1.2/10-D5
LSN-1.5/10-D5
LSN-1.8/10-D5
➄
LSN-2/10-D5
LSN-2.5/10-D5
LSN-3.3/10-D5
LSN-3.8/10-D5
V
OUT
(Volts)
1
1.2
1.5
1.8
2
2.5
3.3
3.8
I
OUT
(Amps)
10
10
10
10
10
10
10
10
R/N (mVp-p)
➁
Typ.
Max.
10
10
10
10
10
10
10
10
35
35
35
35
35
35
35
35
Regulation (Max.)
➂
Line
Load
±0.1%
±0.1%
±0.1%
±0.1%
±0.1%
±0.1%
±0.1%
±0.1%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
±0.25%
V
IN
Nom.
(Volts)
5
5
5
5
5
5
5
5
Range
(Volts)
4.5-5.5
4.5-5.5
4.5-5.5
4.5-5.5
4.5-5.5
4.5-5.5
4.5-5.5
4.5-5.5
I
IN
➃
(mA/A)
50/2.43
50/2.85
50/3.48
50/4.09
50/4.51
50/5.50
50/7.25
50/8.0
Efficiency
Full Load
½ Load
Min.
83%
85%
87%
89%
89.5%
91%
92%
92%
Typ.
86%
88%
90%
91.5%
92.5%
94%
95%
95%
Typ.
89%
91%
92%
93.5%
94%
95.5%
96%
96%
Package
(Case,
Pinout)
B7/B7x, P59
B7/B7x, P59
B7/B7x, P59
B7/B7x, P59
B7/B7x, P59
B7/B7x, P59
B7/B7x, P59
B7/B7x, P59
➀
Typical at T
a
= +25°C under nominal line voltage and full-load conditions, unless otherwise
noted. All models are tested and specified with external 22µF 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.
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.
➂
These devices have no minimum-load requirements and will regulate under no-load condi-
tions. 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
Avaiilable with RoHS (Reduction of Hazardous Substances) compliance.
➅
These are not complete model numbers. Please use the Part Number Structure when
ordering.
PART NUMBER STRUCTURE
L SN
-
1.8
/
10
-
D5 B H J
-
C
Output
Configuration:
L
= Unipolar
Low Voltage
Non-Isolated SIP
Nominal Output Voltage:
1, 1.2, 1.5, 1.8, 2, 2.5, 3.3, or 3.8V
Maximum Rated Output
Current in Amps
See page 15 for details.
RoHS-6
compliant*
J Suffix:
Reversed Pin
Vertical Mount
H Suffix:
Horizontal Mount
B Suffix:
No Remote Sense
(Pin 3 removed)
Note:
Not all model number
combinations are available.
Contact MPS.
Input Voltage Range:
D5
= 4.5 to 5.5 Volts
(5V nominal)
* Contact Murata Power
Solutions for availability.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN-10A D5 Models.B01 Page 2 of 15
Single Output LSN-10A Models
Non-Isolated, 5V
in
,
1-3.8V
out
10 Amp DC/DC In SIP Package
MECHANICAL SPECIFICATIONS
2.00
(50.80)
0.05
(1.27)
1 2 3 4 5
6 7 8 9 10 11
0.35
(8.89)
0.21
(5.33)
0.50
(12.7)
ISOLATING
PAD
0.17
(4.32)
1 2 3 4 5
2.00
(50.80)
0.34
(8.64)
0.20
(5.08)
0.50
(12.7)
6 7 8 9 10 11
0.030 ±0.001 DIA.
(0.762 ±0.025)
0.400
(10.16)
4 EQ. SP. @
0.100 (2.54)
0.56
(14.22)
1.000
(25.40)
0.500
(12.70)
5 EQ. SP. @
0.100 (2.54)
0.05
(1.27)
0.360
(9.14)
0.16
(4.06)
0.400
(10.16)
4 EQ. SP. @
0.100 (2.54)
0.030 ±0.001 DIA.
(0.762 ±0.025)
1.000
(25.40)
0.500
(12.70)
5 EQ. SP. @
0.100 (2.54)
0.05
(1.27)
0.110
(2.79)
0.046
(1.17)
0.53
(13.46)
Case B7A
Horizontal Mounting
LAYOUT PATTERN
TOP VIEW
0.50
(12.7)
0.25
(6.35)
0.34
(8.64)
0.45
(11.43)
LAYOUT PATTERN
TOP VIEW
Case B7
Vertical Mounting
(Standard)
RECOMMENDED
COPPER PAD
ON PCB (0.55 SQ. IN.)
2.00
(50.80)
0.17
(4.32)
1 2 3 4 5
6 7 8 9 10 11
0.36
(9.14)
0.20
(5.08)
0.50
(12.7)
Dimensions in inches (mm)
0.400
(10.16)
4 EQ. SP. @
0.100 (2.54)
0.030 ±0.001 DIA.
(0.762 ±0.025)
1.000
(25.40)
0.500
(12.70)
5 EQ. SP. @
0.100 (2.54)
0.05
(1.27)
0.046
(1.17)
0.106
(2.69)
0.306
(7.8)
LAYOUT PATTERN
TOP VIEW
0.36
(9.14)
Case B7B
Reverse Pin
Vertical Mounting
(Tyco-compatible)
Pin
1
2
3
4
Function P59*
+Output
+Output
+Sense *
+Output
I/O Connections
Pin
Function P59*
5
Common
6
Common
7
+Input
8
+Input
Pin
9
10
11
Function P59*
No Pin
V
OUT
Trim
On/Off Control
Pin 3 (+Sense) removed
for "B" suffix models.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN-10A D5 Models.B01 Page 3 of 15
Single Output LSN-10A Models
Non-Isolated, 5V
in
,
1-3.8V
out
10 Amp DC/DC In SIP Package
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions unless noted.
➀
Input
➀
All models are tested/specified with external 22µF input/output capacitors.These caps accommo-
date our test equipment and may not be required to achieve specified performance in your applica-
tions. All models are stable and regulate within spec under no-load conditions.
➁
See Technical Notes and Performance Curves for details.
➂
The On/Off Control (pin 11) is designed to be driven with open-collector logic or the application of
appropriate voltages (referenced to Common, pins 5 and 6).
➃
Output noise may be further reduced with the installation of additional external output filtering. See
I/O Filtering and Noise Reduction.
Input Voltage Range
Input Current:
Normal Operating Conditions
Inrush Transient
Standby/Off Mode
Output Short-Circuit Condition
➁
Input Reflected Ripple Current
➁
Input Filter Type
Overvoltage Protection
Reverse-Polarity Protection
Undervoltage Shutdown
On/Off Control
➁ ➂
4.5 to 5.5 Volts (5V nominal)
See Ordering Guide
0.014A
2
sec
3mA
70mA average
50mAp-p
Capacitive (264µF)
None
None
None
On = open (internal pulldown)
Off = +2.8V to +V
IN
(<3mA)
Output
Absolute Maximum Ratings
Input Voltage:
Continuous or transient
On/Off Control
(Pin 11)
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
7 Volts
+V
IN
None
None
Current limited. Devices can withstand
sustained output short circuits without
damage.
–40 to +125°C
+300°C
V
OUT
Accuracy
(50% load)
Minimum Loading
➀
Maximum Capacitive Load
V
OUT
Trim Range
➁
Ripple/Noise
(20MHz BW)
➀ ➁ ➃
Total Accurcacy
Efficiency
➁
±1% maximum
No load
10,000µF (electrolytic)
±10%
See Ordering Guide
3% over line/load/temperature
See Ordering Guide
Storage Temperature
Lead Temperature
(soldering, 10 sec.)
Overcurrent Detection and Short-Circuit Protection:
➁
Current-Limiting Detection Point
17 (12.5-22) Amps
Short-Circuit Detection Point
98% of V
OUT
set
SC Protection Technique
Hiccup with auto recovery
Short-Circuit Current
400mA average
Dynamic Characteristics
These are stress ratings. Exposure of devices to 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.
Transient Response
(50% load step)
Start-Up Time:
➁
V
IN
to V
OUT
On/Off to V
OUT
Switching Frequency
50µsec to ±2% of final value
7msec
6msec
300kHz (+40kHz, –50kHz)
Environmental
MTBF:
Bellcore, ground fixed, T
A
= +25°C,
full power, natural convection,
+55°C component temperature
2.1 million hours
Operating Temperature:
(Ambient)
➁
Without Derating (Natural convection)
With Derating
Thermal Shutdown
Dimensions
Package
Pin Dimensions/Material
Weight
Flamability Rating
Safety
–40 to +63/71°C (model dependent)
See Derating Curves
+115°C
Physical
See Mechanical Specifications
Open-frame, single-in-line (SIP)
0.03" (0.76mm) round copper with
gold plate over nickel underplate
0.3 ounces (8.5g)
UL94V-0
UL/cUL/IEC/EN 60950-1, CSA-C22.2 No. 234
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN-10A D5 Models.B01 Page 4 of 15
Single Output LSN-10A Models
Non-Isolated, 5V
in
,
1-3.8V
out
10 Amp DC/DC In SIP Package
TECHNICAL NOTES
Return Current Paths
The LSN D5 SIP’s are non-isolated DC/DC converters. Their two Common
pins (pins 5 and 6) are connected to each other internally (see Figure 1). To
the extent possible (with the intent of minimizing ground loops), input return
current should be directed through pin 6 (also referred to as –Input or Input
Return), and output return current should be directed through pin 5 (also
referred to as –Output or Output Return). Any on/off control signals applied to
pin 11 (On/Off Control) should be referenced to Common (specifically pin 6).
I/O Filtering and Noise Reduction
All models in the LSN D5 Series are tested and specified with external 22µF
input and output capacitors. These capacitors are necessary to accommo-
date our test equipment and may not be required to achieved desired per-
formance in your application. The LSN D5'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 LSN D5's input capacitors are specified for low ESR and
are fully rated to handle the units' input ripple currents. Similarly, the inter-
nal output capacitors are specified for low ESR and full-range frequency
response. As shown in the Performance Curves, removal of the external
output caps has minimal effect on output noise.
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/DC's requires that the dc input voltage
source have low ac impedance at the frequencies of interest. Highly induc-
tive source impedances can greatly affect system stability. Your specific
system configuration may necessitate additional considerations.
Output ripple/noise (also referred to as periodic and random deviations
or PARD) may be reduced below specified limits with the installation of
additional external output capacitors. Output capacitors function as true
filter elements and should be selected for bulk capacitance, low ESR, and
appropriate frequency response. Any scope measurements of PARD should
be made directly at the DC/DC output pins with scope probe ground less
than 0.5" in length.
All external capacitors should have appropriate voltage ratings and be
located as close to the converters as possible. Temperature variations for all
relevant parameters should be taken into consideration.
The most effective combination of external I/O capacitors will be a func-
tion of your line voltage and source impedance, as well as your particular
load and layout conditions. Our Applications Engineers can recommend
potential solutions and discuss the possibility of our modifying a given
device’s internal filtering to meet your specific requirements. Contact our
Applications Engineering Group for additional details.
Input Fusing
Most applications and or safety agencies require the installation of fuses at the
inputs of power conversion components. LSN D5 Series DC/DC converters are
not internally fused. Therefore, if input fusing is mandatory, either a normal-
blow or a slow-blow fuse with a value no greater than 15 Amps should be
installed within the ungrounded input path to the converter.
As a rule of thumb however, we recommend to use a normal-blow or
slow-blow fuse with a typical value of about twice the maximum input current,
calculated at low line with the converters minimum efficiency.
Safety Considerations
LSN D5 SIP's are non-isolated DC/DC converters. In general, all DC/DC's must
be installed, including considerations for I/O voltages and spacing/separation
requirements, in compliance with relevant safety-agency specifications (usually
UL/IEC/EN60950-1).
In particular, for a non-isolated converter's output voltage to meet SELV
(safety extra low voltage) requirements, its input must be SELV compliant. If the
output needs to be ELV (extra low voltage), the input must be ELV.
Input Overvoltage and Reverse-Polarity Protection
LSN D5 SIP Series DC/DC's do not incorporate either input overvoltage or input
reverse-polarity protection. Input voltages in excess of the specified absolute
maximum ratings and input polarity reversals of longer than "instantaneous"
duration can cause permanent damage to these devices.
Start-Up Time
The V
in
to V
out
Start-Up Time is the interval between the time at which a ramp-
ing input voltage crosses the lower limit of the specified input voltage range
(4.5 Volts) and the fully loaded output voltage enters and remains within its
specified accuracy band. Actual measured times will vary with input source
impedance, external input capacitance, and the slew rate and final value of the
input voltage as it appears to the converter.
The On/Off to V
OUT
Start-Up Time assumes the converter is turned off via the
On/Off Control with the nominal input voltage already applied to the converter.
The specification defines the interval between the time at which the converter
is turned on and the fully loaded output voltage enters and remains within its
specified accuracy band. See Typical Performance Curves.
Remote Sense
LSN D5 SIP Series DC/DC converters offer an output sense function on pin 3.
The sense function enables point-of-use regulation for overcoming moderate
IR drops in conductors and/or cabling. Since these are non-isolated devices
whose inputs and outputs usually share the same ground plane, sense is
provided only for the +Output.
The remote sense line is part of the feedback control loop regulating the
DC/DC converter’s output. The sense line carries very little current and conse-
quently requires a minimal cross-sectional-area conductor. As such, it is not
a low-impedance point and must be treated with care in layout and cabling.
Sense lines should be run adjacent to signals (preferably ground), and in
cable and/or discrete-wiring applications, twisted-pair or similar techniques
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_LSN-10A D5 Models.B01 Page 5 of 15
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