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LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
Typical unit
FEATURES
Non-isolated Point-of-Load (POL) converter, ideal
for mixed voltage systems
Optimized for CPUs, DSPs and programmable logic
- FPGAs, ASICs
Amps maximum output current
30
User-selectable output voltage, 0.8Vdc to 5.0Vdc
via trim resistor or voltage input
input range 6Vdc to 14Vdc (Vout <3.6V)
Wide
Selectable phased start-up sequencing and tracking
Excellent efficiency over output voltage range
models available, with or without additional
Two
ground/thermal pads
settling, high di/dt slew rate, low output noise
Fast
Extensive self protection plus 'hiccup' short circuit
auto recovery
Meets full safety and emission certification
DESCRIPTION
Today’s high performance CPU and programma-
ble logic devices demand superior performance
from their power source. The LSM2-T/30-D12
series DC/DC converters offer up to 30 Amps
continuous output power with a user-selectable
output of 0.8 to 3.6 Volts. 25 Amps output is
available up to 5.0 V
OUT
. This tiny converter is
ideal for applications with an input range of
6 to 14 Volts DC. The pinout, trim system and
mechanical footprint is compatible with the DOSA
(www.dosapower.com) industry standard.
To ensure very high performance of powered
logic systems, the LSM2-T/30-D12 features low
output noise, high slew rates (20 Amps/μSec.),
fast transient response (25 μSec settling) and
tight line and load regulation. Many logic devices
require controlled start up and tracking capabili-
ties. The LSM2-T/30-D12 includes a Sequence/
Track function and prebias protection against
external startup voltages. Other features include
no additional external components required,
stable no-load operation, up to 10,000 μF output
load capacitance and no reverse conduction.
System functions offer a remote On/Off
control, two additional ground pins (optional)
and a load Sense input. These converters meet
agency standards UL/EN 60950-1, CAN/CSA-
C22.2 60950-1, IEC 60950-1, 2nd edition, and
EN55022/CISPR22 emissions characterization.
The automated surface mount assembly is fully
compatible with RoHS (Reduction of Hazard-
ous Substances) construction and attachment.
The LSM2-T/30-D12 mounts to its host carrier
board via reflow-soldered PCB pads.
The extraordinary efficiency means low heat
and freedom from expensive, bulky heat sinks. A
wealth of protection features include input under-
voltage shutdown, output overcurrent current lim-
iting, short circuit protection and overtemperature
shutdown/recycle.
For full details go to
www.murata-ps.com/rohs
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MDC_LSM2_T30_D12 Series.E01Δ
Page 1 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Model Family
LSM2-T/30-D12-C
LSM2-T/30-D12R-C
LSM2-T/30-D12R-C-CIS
Input
Max.
25
25
25
V
OUT
(Volts)
0.8-5
0.8-5
0.8-5
I
OUT
Power
(Amps) (Watts)
30
30
30
125
125
125
R/N (mVp-p)
Typ.
15
15
15
Regulation (max.)
V
IN
Nom.
(Volts)
Line
Load
±0.2%
±0.2%
±0.2%
±0.4%
±0.4%
±0.4%
12
12
12
Range
(Volts)
6-14
6-14
6-14
I
IN
(mA/A)
210/11.1
210/11.1
210/11.1
Efficiency
Min.
92.5%
92.5%
92.5%
Typ.
94%
94%
94%
Package
(Case/
Pinout)
C71, P72
C71, P72
C71, P72
Typical @ Ta=+25°C. under nominal line voltage and full-load conditions unless noted. Nominal
output is +5 Volts.
Ripple/Noise (R/N) is tested/specified over a 5 Hz to 20 MHz bandwidth and may be reduced by
adding external filtering. R/N is shown at V
OUT
<= 2.5 Volts.
These devices have no minimum load requirements and will regulate 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.
➆
➇
Nominal line voltage, no-load/full-load conditions.
LSM2-T/30-D12 efficiencies are shown at V
OUT
= 5 Volts.
I
OUT
max. is 30 Amps with V
OUT
= 0.8 to 3.6 Volts. With V
OUT
>3.6 Volts, I
OUT
max. is 25 Amps.
If V
OUT
>3.63V, input range is 7-14V.
LSM2-T/30-D12R-C-CIS models use a 100KΩ resistor between the gate and source of the internal
On/Off (Enable) FET controlling the PWM.
PART NUMBER STRUCTURE
L SM2
-
T
/
30
-
D12 R
-
C
Output Configuration:
L
= Unipolar
Low Voltage
Non-Isolated SMT
Nominal Output Voltage:
0.8-5.0 Volts
Maximum Rated Output
Current in Amps
CONNECTION DIAGRAM
RoHS6 Hazardous Substance Compliant
(does not claim EU RoHS exemption 7b–lead in solder)
Additional Grounds:
Blank
= Omitted
R
= Installed
Input Voltage Range:
D12
= 6-14 Volts (12V nominal)
See note 7 above.
+INPUT
+OUTPUT
Additional
ground/thermal
pads
COMMON
V
CC
ON/OFF
CONTROL
PWM
CONTROLLER
*
CURRENT
SENSE
+SENSE
COMMON
V
TRACK
/
SEQUENCE
INPUT
REFERENCE &
ERROR AMP
V
OUT
TRIM
*One phase of two is shown.
Typical topology is shown.
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MDC_LSM2_T30_D12 Series.E01Δ
Page 2 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
MECHANICAL SPECIFICATIONS
Case C71
PIN #1 THIS
CORNER (FARSIDE)
SMT contacts: copper alloy with
5μ" Au (min.) over 50μ" Ni (min.)
TOP
VIEW
ISOMETRIC
VIEW
PIN #1
13.5
0.53
INPUT/OUTPUT CONNECTIONS P72
Pad
Function
1
2
3
4
5
6
7
9
*
10
*
On/Off Control
+Input
Sequence/Track In
Common
+Output
Trim
Sense In
Common
Common
Pins 9 & 10 PRESENT
ONLY ON 'R' OPTION
33.0
1.30
SIDE
VIEW
9.1
0.36
END
VIEW
MTG PLANE
0.020 MIN
BETWEEN MTG PLANE
AND COMPONENTS
2.03±0.13
0.080±0.005
REF
ALL PINS COPLANAR
WITHIN 4 MILS
1.57±0.20
0.062±0.008
CONTACTS TYP
*
4 EQ SP @
0.190 [4.83] EACH
EQUALS 0.760 [19.30]
4.83
0.190
REF
3
10.92
0.430
4
5
6
7
9
1
8.76
0.345
Dimensions are in inches (mm) shown for ref. only.
BOTTOM
VIEW
3.05
0.120
1.91
0.075
Component locations
are typical.
Third Angle Projection
10
2
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
26.85
1.057
30.58
1.204
29.90
1.177
22.02
0.867
12.37
0.487
17.20
0.677
2.90
0.114
0.69
0.027
1.22
0.048
0.64
0.025
0
7.54
0.297
1.27
0.050
29.90
1.177
0
1.47
0.058
2.16
0.085
0
3.05
0.120
10.29
0.405
14.0
0.55
DIMENSIONS ARE IN INCHES [mm]
TOLERANCES:
2 PLACE 0.02
3 PLACE 0.010
ANGLES: 1
2
10
1
9
2.26
0.089
COMPONENTS SHOWN ARE FOR REFERENCE ONLY
MATERIAL:
SMT PINS: COPPER ALLOY
FINISH: (ALL PINS)
GOLD (5u"MIN) OVER NICKEL (50u" MIN)
2.41
0.095
REF
*
3
4
5
6
7
0.140 [3.56] x
0.095 [2.41]
PADS FOR PINS
1 THRU 7 (7 PLS)
3.56
0.140
REF
2.41
0.095
REF
33.5
1.32
0.095 [2.41] x
0.082 [2.08] PADS
FOR PINS 9 & 10
(OPTIONAL GNDS)
Additional Ground/Thermal Pads (“R” models)
The LSM2-T/30-D12 is optionally available with two additional ground
pads for increased current handling and better heat transfer. These are
indicated with the “R” designator in the model number, LSM2-T/30-D12R-C.
MPS recommends that users lay out their PC boards to accept these two
pads for larger current applications. Please note that the Derating curves for
the “R” models accept higher temperature and greater current limits than
units without the additional pads.
To realize the additional current and thermal capacity of “R” models, you
must have a substantial area of several square inches of copper etch flow-
soldered to these pads and sufficient feed-throughs or other means of con-
ducting current. The “R” pads and the standard pads 1 and 2 are in parallel.
If your application uses a standard DOSA pad layout and you cannot connect
to these ground pads, order model LSM2-T/30-D12-C without the “R” designa-
tor. Please observe the lower Derating curves for standard, “non-R” models.
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MDC_LSM2_T30_D12 Series.E01Δ
Page 3 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
SHIPPING SPECIFICATIONS
PICK-UP NOZZLE
LOCATION
( 6mm MAX)
2.0
0.08
FEED (UNWIND)
DIRECTION ------
PIN #1 TYP
(ORIENTATION)
4.00
0.157
TYP
9.7
0.38
20.3
0.80
40.4
1.59
REF
44.0
1.73
WIDTH
35.1
1.38
24.00
0.945
PITCH
TOP COVER TAPE
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
PIN #1
THIS CORNER
(FAR SIDE)
44.0
1.73
REF
PICKUP NOZZLE
LOCATION
( 6.5-7.5mm)
16.5
0.65
FEED (UNWIND)
DIRECTION
-------
330.2
13.00
6.7
0.27
PICK & PLACE PICKUP (P/U)
101.6
4.00
(CORE)
REEL INFORMATION
(250 UNITS PER REEL)
13.00
0.512
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MDC_LSM2_T30_D12 Series.E01Δ
Page 4 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
Performance and Functional Specifications
See Note 1
Input
Input Voltage Range
Isolation
Start-Up Voltage
Undervoltage Shutdown
Overvoltage Shutdown
Internal Input Filter Type
Reverse Polarity Protection
Recommended External Fuse
Input Current:
Full Load Conditions
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output Short Circuit
Low Line (V
IN
=Vmin, 5V
OUT
)
Remote On/Off Control
(Note 5)
Negative Logic (No model suffix)
Current
See Ordering Guide
Not isolated. Input and output
Commons are internally connected.
5.6 Volts
5 Volts
None
Calculated MTBF
(4)
Operating Temperature Range
With derating
Storage Temperature Range
Thermal Protection/Shutdown
Dynamic Characteristics
Dynamic Load Response
(50-100-50% load step, di/dt=20A/μSec)
Start-Up Time
(V
IN
on to V
OUT
regulated or On/Off to V
OUT
)
Switching Frequency
60
μSec
to within
±2%
of final value
10 mSec for V
OUT
=nominal
430 KHz
Environmental
3,917,077 Hours
-40 to +85°C. (Note 9)
See Derating Curves (Note 12)
-55 to +125°C.
+115°Celsius
2
to 85%/+85°C, non-condensing
Reflected (Back) Ripple Current
(Note 2) 50 mA pk-pk
Capacitive
None, install external fuse.
35 Amps, fast blow
See Ordering Guide
0.4 A
2
Sec.
5 mA
60 mA
18.9 Amps
ON = Open pin or 0 to +0.55 V max.
OFF = +3.0V min. to +V
IN
max.
1.3 mA max.
MSL Rating
Relative Humidity
Physical
Outline Dimensions
Weight
Electromagnetic Interference
(conducted and radiated)
Safety
See Mechanical Specifications
0.28 ounces (7.8 grams)
Meets EN55022/CISPR22
(may need external filter)
Meets UL/cUL 60950-1, IEC/EN 60950-1,
2nd edition
Output
Minimum Loading
Accuracy (50% load)
Voltage Adjustment Range
(Note 13)
Overvoltage Protection
(Note 20)
Temperature Coefficient
Ripple/Noise (20 MHz bandwidth)
Line/Load Regulation
(See Tech. Notes)
Efficiency
Maximum Capacitive Loading
(Note 15)
Cap-ESR=0.001 to 0.01 Ohms
Cap-ESR >0.01 Ohms
Current Limit Inception
(Note 19)
(98% of V
OUT
setting)
Short Circuit Mode
(Note 6)
Short Circuit Current Output
Protection Method
Short Circuit Duration
Prebias Startup (Note 16)
Sequencing
Slew Rate
Startup delay until sequence start
Tracking accuracy, rising input
Tracking accuracy, falling input
Remote Sense to V
OUT
2V per millisecond max.
10 milliseconds min.
V
OUT
=±100 mV of Sequence In
V
OUT
=±200 mV of Sequence In
0.5V max. (Note 7)
600 mA
Hiccup autorecovery upon overload
removal. (Note 17)
Continuous, no damage (output shorted
to ground)
Converter will start up if the external
output voltage is less than Vnominal.
5,000
μF
10,000
μF
48 Amps (cold startup)
42 Amps (after warm up)
No minimum load
±1.5
% of Vnominal
See Ordering Guide
None
±0.01%
per
ο
C of V
OUT
range
See Ordering Guide and Note 8
See Ordering Guide and Note 10
See Ordering Guide
Absolute Maximum Ratings
Input Voltage (Continuous or transient)
On/Off Control (negative logic)
Input Reverse Polarity Protection
Output Current
(Note 7)
Storage Temperature
Lead Temperature
+15 Volts
Zero Volts min. to +V
IN
max.
None, install external fuse.
Current-limited. Devices can withstand
sustained short circuit without damage.
-55 to +125
°
C.
See soldering guidelines
Absolute maximums 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 neither implied nor recommended.
Specification Notes:
(1) Specifications are typical at +25°C, V
IN
=nominal (+12V), V
OUT
=nominal (+5V), full load, external
caps and natural convection unless otherwise indicated. Tests at full power should supply
substantial forced airflow.
All models are tested and specified with external 0.1μF and 10 μF paralleled ceramic/tantalum
output capacitors and a 22 μF 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.
(2) Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filter-
ing is C
IN
=2 x 100 μF tantalum, Cbus=1000 μF electrolytic, Lbus=1 μH.
(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, Tpcboard=+25°C, full output load, natural air convection.
(5) The On/Off Control may be driven with external logic or by applying appropriate external volt-
ages 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
.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the
selected setting.
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MDC_LSM2_T30_D12 Series.E01Δ
Page 5 of 12
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