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LSM LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
Typical unit
FEATURES
Non-isolated Point-of-Load (POL) converter, ideal for distributed bus applications Optimized for CPUs, DSPs and programmable logic - FPGAs, ASICs 30 Amps maximum output current User-selectable output voltage, 0.8Vdc to 5.0Vdc via trim resistor or voltage input Wide input range 6Vdc to 14Vdc (VOUT <3.6V) Selectable phased start-up sequencing and tracking Excellent efficiency over output voltage range Two models available, with or without additional ground/thermal pads Fast settling, high di/dt slew rate, low output noise Extensive self protection plus 'hiccup' short circuit auto recovery Designed for full safety and emission certification
SIMPLIFIED SCHEMATIC
DESCRIPTION
Today's high performance CPU and programmable 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 VOUT. This tiny converter is ideal for distributed bus architectures (DBA) and intermediate power busses 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/Sec.), fast transient response (25 Sec settling) and tight line and load regulation. Many logic devices require controlled start up and tracking capabilities. The LSM2-T/30-D12 includes a Sequence/ Track function and prebias protection against external startup voltages. Other DBA features include no additional external components required, stable no-load operation, up to 10,000 F 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. Agency certifications include UL/EN 60950-1, CAN/CSA-C22.2 60950-1, IEC 60950-1, and FCC emissions characterization. The automated surface mount assembly is fully RoHS (Reduction of Hazardous Substances) lead-free 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 undervoltage shutdown, output overcurrent current limiting, short circuit protection and overtemperature shutdown/recycle.
+INPUT
+OUTPUT
Additional ground/thermal pads
*
VCC PWM CONTROLLER CURRENT SENSE
+SENSE
COMMON
COMMON
ON/OFF CONTROL
VTRACK/ SEQUENCE INPUT
REFERENCE & ERROR AMP
VOUT TRIM
*One phase of two is shown.
Typical topology is shown.
Pb
For full details go to www.murata-ps.com/rohs
Lead-free construction/attach
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MDC_LSM2_T30_D12 Series.B12 Page 1 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
PERFORMANCE SPECIFICATIONS AND ORDERING GUIDE 1 Output Model Family
LSM2-T/30-D12-C LSM2-T/30-D12R-C
Input Regulation (max.)3 Line
0.2% 0.2%
VOUT (Volts)
0.8-5 0.8-5
IOUT 6 (Amps)
30 30
Power (Watts)
125 125
R/N (mVp-p)2 Typ.
15 15
Max.
25 25
Load
0.4% 0.4%
VIN Nom. (Volts)
12 12
Range 7 (Volts)
6-14 6-14
IIN 4 (mA/A)
210/11.1 210/11.1
Efficiency5 Min.
92.5% 92.5%
Typ.
94% 94%
Package (Case/ Pinout)
C71, P72 C71, P72
1 Typical @ Ta=+25C. under nominal line voltage and full-load conditions unless noted. Nominal 4 Nominal line voltage, no-load/full-load conditions. 5 LSM2-T/30-D12 efficiencies are shown at VOUT = 5 Volts. output is +5 Volts. 6 IOUT max. is 30 Amps with Vin = 0.8 to 3.6 Volts. With VIN >3.6 Volts, IOUT max. is 25 Amps. 2 Ripple/Noise (R/N) is tested/specified over a 5 Hz to 20 MHz bandwidth and may be reduced by If VOUT >3.63V, input range is 7-14V. adding external filtering. R/N is shown at VOUT <= 2.5 Volts. 3 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.
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 MECHANICAL SPECIFICATIONS Case C71
1.30 (33.02)
RoHS-6 compliant Additional Grounds: Blank = Omitted R = Installed
Input Voltage Range: D12 = 6-14 Volts (12V nominal) See note 7 above.
SMT contacts: copper alloy with 5 " Au (min.) over 50 " Ni (min.)
INPUT/OUTPUT CONNECTIONS P72 Pad Function 1 2 3 4 5 6 7 8
7 8
0.36 (9.14)
On/Off Control +Input Sequence/Track In Common +Output Trim Sense In Not used Additional Ground (optional)
Component locations are typical.
0.120 (3.05)
Contact coplanarity: 0.004 (0.01)
0.950 (24.13) 5 EQ. SP. @ 0.190 (4.83)
3 4 5 6
0.080 0.005 (2.03) 0.155 (3.94)
*
0.114 (2.9)
* 2
o 0.062 0.008
contacts (1.57)
* 1
0.48 (12.19)
0.53 (13.46)
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
0.430 (10.92)
BOTTOM VIEW 0.075 (1.91) 0.027 (0.68) 1.177 (29.90) 0.120 (30.5) 0.048 (1.22)
Tolerances (unless otherwise specified): .XX 0.02 (0.5) .XXX 0.010 (0.25) Angles 2 Components are shown for reference only.
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MDC_LSM2_T30_D12 Series.B12 Page 2 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
RECOMMENDED PAD LAYOUT
0.487 (12.37) 0.677 (17.20) 0.867 (22.02) 1.057 (26.85) 1.177 (29.90) 1.204 (30.58) Optional Additional Ground Pad Size: 0.095 x 0.082 (2.41 x 2.08)
MDC_LSM2_T30_D12 Series.B12 Page 3 of 12
0.000 (0.00)
0.107 (2.72)
0.405 (10.29) Not Used Optional Additional Ground Pad Size: 0.095 x 0.082 (2.41 x 2.08) 0.120 (3.05) 0.089 (2.26) 0.000 (0.00) 0.025 (0.64) Pad Size: Min. 0.140 x 0.095 (3.56 x 2.08) GND (-H) ON/OFF GND (-H) VIN SENSE TRIM VOUT GND SEQ
0.297 (7.54)
Dimensions are in inches (mm)
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 flowsoldered to these pads and sufficient feed-throughs or other means of conducting 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" designator. Please observe the lower Derating curves for standard, "non-R" models.
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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 Input Current: Full Load Conditions Inrush Transient Shutdown Mode (Off, UV, OT) Output Short Circuit No Load, 5V out Low Line (VIN=Vmin, 5VOUT) Remote On/Off Control (Note 5) Negative Logic (No model suffix) (See Note 18) 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
Dynamic Characteristics
Dynamic Load Response (50-100-50% load step, di/dt=20A/ Sec) Start-Up Time (VIN on to VOUT regulated or On/Off to VOUT) Switching Frequency 60 Sec to within 2% of final value 10 mSec for VOUT=nominal 430 30 KHz
Environmental
3,917,077 Hours -40 to +85C. (Note 9) See Derating Curves (Note 12) -55 to +125C. +115Celsius to 85%/+85C, non-condensing
Reflected (Back) Ripple Current (Note 2) 50 mA pk-pk Capacitive None, see fuse information See Ordering Guide 0.4 A2Sec. 5 mA 60 mA 210 mA 18.9 Amps ON = 0 to +0.55 V max. OFF = +3.0V min. to +VIN max. 1.3 mA max.
Thermal Protection/Shutdown Relative Humidity
Physical
Outline Dimensions Weight Electromagnetic Interference (conducted and radiated) Safety See Mechanical Specifications 0.28 ounces (7.8 grams) FCC part 15, class B, EN55022 (may need external filter) Designed to meet UL/cUL 60950-1 CSA-C22.2 No. 60950-1, IEC/EN 60950-1
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 VOUT 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 VOUT 2V per millisecond max. 10 milliseconds min. VOUT=100 mV of Sequence In VOUT=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 F 10,000 F 48 Amps (cold startup) 42 Amps (after warm up) No minimum load 1.5 % of Vnominal See Ordering Guide None 0.01% per C of VOUT range See Ordering Guide and Note 8 See Ordering Guide and Note 10 See Ordering Guide
Storage Temperature Lead Temperature (soldering 10 sec. max.) Input Voltage (Continuous or transient) On/Off Control (negative logic) Input Reverse Polarity Protection Output Current (Note 7)
Absolute Maximum Ratings
+15 Volts Zero Volts min. to +VIN max.
None, see fuse section
Current-limited. Devices can withstand sustained short circuit without damage. -55 to +125C. +280C.
Absolute maximums 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 nor recommended.
Specification Notes:
(1) Specifications are typical at +25C, VIN=nominal (+12V), VOUT=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 0.1F and 10 F paralleled ceramic/tantalum output capacitors and a 22 F 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 filtering is CIN=2 x 100 F tantalum, Cbus=1000 F electrolytic, Lbus=1 H. (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=+25C, 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 +VIN. (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.B12 Page 4 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
Specification Notes continued:
(7) If Sense is connected remotely at the load, up to 0.5 Volts difference is allowed between the Sense and +VOUT 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. (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 will be reviewed under scheduled quantity special order. (12) Maximum continuous power requires that all on-board components not exceed +128C package temperature. (13) Do not exceed maximum power specifications when adjusting the output trim. (14) The "R" option includes extra ground pads. These pads offer two important features. In addition to carrying extra current, they also help dissipate additional heat. MPS strongly recommends soldering the "R" pads to a thick ground plane with sizable area. The Operating Temperature specification listed above assumes that these additional ground pads are connected to a substantial ground plane below the converter ( at least several square inches). (15) The maximum output capacitive loads depend on the the Equivalent Series Resistance (ESR) of the external output capacitor. Larger caps will reduce output noise but may slow transient response. (16) Do not use Pre-bias startup and sequencing together. If you do not use the track function, leave the seq/trk pin open. (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) Output current limiting is disabled at start up to avoid overcurrent shutdown while charging external bypass capacitors.
Resistor Trim Equation
1200 RTRIM (in Ohms) = --------------------- -100 VOUT - 0.8
The fixed trim resistors to set the output voltage are: VOUT 0.8V. 1.0V. 1.2V. Rtrim (Ohms) VOUT Rtrim (Ohms) Open 2.0V. 0.90 K 5.90 K 2.5V. 605 2.90 K 3.3V. 380
1.5V. 1.614 K 5.0V. 185.71
1.8V. 1.10 K
Output Adjustments The LSM2-T/30-D12 series includes a special output voltage trimming feature which is fully compatible with competitive units. The output voltage may be varied using a single trim resistor from the Trim Input to Power Common. Use a precision, low-tempco resistor ( 100 ppm/ C) mounted close to the converter with short leads. Be aware that the voltage accuracy is 1.5% (typical) therefore adjust this resistance to achieve your desired output.
Voltage Reference,
Figure 2. Voltage Trim Connections
Voltage Trim The LSM2 Series may also be trimmed using an external low-noise voltage applied between the Trim input and Output Common. Be aware that the internal "load" impedance looking into Trim pin is below 1000 Ohms and includes factors from the output voltage. Therefore, use a low impedance source resistance in your external voltage reference. The fixed trim voltages to set the output voltage are: VOUT (typ.) Vtrim (Volts) 0.80V. Open 2.0 V. 0.720V. 1.0V. 0.787V. 2.5V. 0.687V. 1.2V. 0.773V. 3.3V. 0.633V. 1.5V. 0.753V. 5.0V. 0.520V. 1.8V. 0.733V
Figure 1. Trim Resistor Connections
VOUT (typ.) Vtrim (Volts)
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 atmospheric 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. Reflow Solder Operations for surface-mount products (SMT)
For Sn/Ag/Cu based solders: Preheat Temperature Time over Liquidus Maximum Peak Temperature Cooling Rate Less than 1 C. per second 45 to 75 seconds 260 C. Less than 3 C. per second For Sn/Pb based solders: Preheat Temperature Time over Liquidus Maximum Peak Temperature Cooling Rate Less than 1 C. per second 60 to 75 seconds 235 C. Less than 3 C. per second
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MDC_LSM2_T30_D12 Series.B12 Page 5 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
PERFORMANCE DATA: OUTPUT VOLTAGE = 5 VOLTS
Efficiency vs. Line Voltage and Load Current @ +25C Output Ripple & Noise (VIN = 12 V, IOUT = 20 A, COUT = 10F || 1F, 'scope = 20 MHz BW) Vertical = 20 mV/div., Sweep = 1S/div.
98 93 88 83 VIN = 14 V VIN = 12 V VIN = 7 V
Efficiency (%)
78 73 68 63 58 1 2.66 4.31 5.97 7.62 9.28 10.9 12.6 14.2 15.9 17.6 19.2 20.9 22.5 24.2
Load C urre nt (Amps)
LSM2-T/30-D12R Maximum Current Temperature Derating at Sea Level (VIN= 12V, Transverse Airflow). Extra ground pads installed.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 21.00 20.00 19.00 Natural Convection 100 LFM 18.00 200 LFM 17.00 16.00 15.00 14.00 13.00 12.00 20 25 30
Power-On Startup (VIN = 12 V, IOUT = 25 A) Ch2 = 20 A/div.
300 LFM 400 LFM 500 LFM
Output Current (Amps)
35
40
45
50 55 60 65 Ambient Temperature (C)
70
75
80
85
90
LSM2-T/30-D12 Maximum Current Temperature Derating at Sea Level (VIN= 12V, Transverse Airflow). No extra ground pads.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 21.00 20.00 19.00 18.00 17.00 16.00 Natural Convection 15.00 100 LFM 14.00 200 LFM 13.00 12.00 11.00 20 25 30 35
StepLoad Transient Response (VIN = 12 V, 0-15A-0)
300 LFM 400 LFM 500 LFM
Output Current (Amps)
40 45 50 55 60 Ambient Temperature (C)
65
70
75
80
85
90
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MDC_LSM2_T30_D12 Series.B12 Page 6 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
PERFORMANCE DATA: OUTPUT VOLTAGE = 3.3 VOLTS
Efficiency vs. Line Voltage and Load Current (VIN = 12V) @ +25C Output Ripple & Noise (VIN = 12 V, IOUT = 20 A, COUT = 10F || 1F, 'scope = 20 MHz BW) Vertical = 20 mV/div., Sweep = 1S/div.
93 88
Efficiency (%)
83 78 73 68 63 58
VIN = 14 V VIN = 12 V VIN = 6 V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 O utput Current (Amps)
LSM2-T/30-D12R Maximum Current Temperature Derating at Sea Level (VIN= 12V, Transverse Airflow). Extra ground pads installed.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 21.00 20.00 Natural Convection 100 LFM 19.00 200 LFM 18.00 17.00 16.00 15.00 14.00 13.00 12.00 20 25 30 35
Power-On Startup (VIN = 12 V, IOUT = 25 A)
300 LFM 400 LFM
Output Current (Amps)
40 45 50 55 60 Ambie nt Te mpe rature (C)
65
70
75
80
85
90
LSM2-T/30-D12 Maximum Current Temperature Derating at Sea Level (VIN= 12V, Transverse Airflow). No extra ground pads.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 21.00 20.00 19.00 Natural Convection 100 LFM 18.00 200 LFM 17.00 300 LFM 16.00 15.00 14.00 13.00 12.00 20 25 30
StepLoad Transient Response (VIN = 12 V, 0-15A-0)
400 LFM 500 LFM
Output Current (Amps)
35
40 45 50 55 60 Ambient Temperature (C)
65
70
75
80
85
90
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MDC_LSM2_T30_D12 Series.B12 Page 7 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
PERFORMANCE DATA: OUTPUT VOLTAGE = 2.5 VOLTS
Efficiency vs. Line Voltage and Load Current (VIN = 12V) @ +25C Output Ripple & Noise (VIN = 12 V, IOUT = 20 A, COUT = 10F || 1F, 'scope = 20 MHz BW) Vertical = 20 mV/div., Sweep = 1S/div.
93
88
83
Efficiency (%)
VIN = 14 V VIN = 12 V VIN = 6 V
78
73
68
63
58 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
O utput C urre nt (Amps)
LSM2-T/30-D12R Maximum Current Temperature Derating at Sea Level (VIN= 12V, Transverse Airflow). Extra ground pads installed.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 21.00 Natural Convection 100 LFM 20.00 200 LFM 19.00 18.00 17.00 16.00 15.00 20 25 30
300 LFM 400 LFM
Output Current (Amps)
35
40
45
50
55
60
65
70
75
80
85
90
Ambie nt Te mpe rature (C)
LSM2-T/30-D12 Maximum Current Temperature Derating at Sea Level (VIN= 12V, Transverse Airflow). No extra ground pads.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 21.00 20.00 19.00 18.00 Natural Convection 100 LFM 17.00 200 LFM 16.00 15.00 14.00 13.00 20 25 30
StepLoad Transient Response (VIN = 12 V, 0-15A-0)
300 LFM 400 LFM
Output Current (Amps)
35
40
45 50 55 60 65 Ambie nt Te mpe rature (C)
70
75
80
85
90
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MDC_LSM2_T30_D12 Series.B12 Page 8 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
PERFORMANCE DATA: OUTPUT VOLTAGE = 1.8 VOLTS
Efficiency vs. Line Voltage and Load Current @ +25C Output Ripple & Noise (VIN = 12 V, IOUT = 20 A, COUT = 10F || 1F, 'scope = 20 MHz BW) Vertical = 10 mV/div., Sweep = 1S/div.
91 86 81
Efficiency (%)
76 71 66 61 56 1 2 3 4 5 6
VIN = 14 V VIN = 12 V VIN = 6 V
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Load Current (Amps)
LSM2-T/30-D12R Maximum Current Temperature Derating at Sea Level (VIN= 12V, Transverse Airflow). Extra ground pads installed.
31.00 30.00 29.00 28.00 27.00 26.00 300 LFM 400 LFM
Power-On Startup (VIN = 12 V, IOUT = 25 A)
Output Current (Amps)
25.00 24.00 23.00 22.00 21.00 20.00 19.00 18.00 17.00 20
Natural Convection 100 LFM 200 LFM
25
30
35
40
45
50 55 60 65 Ambient Temperature (C)
70
75
80
85
90
LSM2-T/30-D12 Maximum Current Temperature Derating at Sea Level (VIN= 12V, Transverse Airflow). No extra ground pads.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 21.00 20.00 Natural Convection 19.00 100 LFM 18.00 200 LFM 17.00 16.00 15.00 14.00 13.00 20 25 30 35
StepLoad Transient Response (VIN = 12 V, 0-15A-0)
300 LFM 400 LFM
Output Current (Amps)
40 45 50 55 60 Ambie nt Te mpe rature (C)
65
70
75
80
85
90
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MDC_LSM2_T30_D12 Series.B12 Page 9 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
PERFORMANCE DATA: OUTPUT VOLTAGE = 1.2 VOLTS
Efficiency vs. Line Voltage and Load Current @ +25C (VIN = 12V) Output Ripple & Noise (VIN = 12 V, IOUT = 30 A, COUT = 10F || 1F, 'scope BW = 20 MHz)
89
84
79
VIN = 6 V VIN = 12 V VIN = 14 V
74
Efficiency (%)
69
64
59
54
49 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Output Current (Amps)
LSM2-T/30-D12R Maximum Current Temperature Derating (VIN= 12V, Transverse Airflow). Extra ground pads installed.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 Natural Convection 100 LFM 21.00 200 LFM 20.00 19.00 18.00 17.00 16.00 20 25 30
Power-On Startup (VIN = 12 V, IOUT = 30 A)
300 LFM 400 LFM
Output Current (Amps)
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (C)
StepLoad Transient Response (VIN = 12 V, 0-15A-0)
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MDC_LSM2_T30_D12 Series.B12 Page 10 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
PERFORMANCE DATA: OUTPUT VOLTAGE = 0.8 VOLTS
Efficiency vs. Line Voltage and Load Current @ +25C (VIN = 12V) Output Ripple & Noise (VIN = 12 V, IOUT = 30 A, COUT = 10F || 1F, 'scope BW = 20 MHz)
87
82
77
72
VIN = 14 V VIN = 12 V VIN = 6 V
Efficiency (%)
67
62
57
52
47
42 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Output Current (Amps)
LSM2-T/30-D12R Maximum Current Temperature Derating (VIN= 12V, Transverse Airflow). Extra ground pads installed.
31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 23.00 22.00 21.00 20.00 19.00 18.00 17.00 16.00 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Power-On Startup (VIN = 12 V, IOUT = 30 A)
300 LFM 400 LFM
Output Current (Amps)
Natural Convection 100 LFM 200 LFM
Ambient Temperature (C)
StepLoad Transient Response (VIN = 12 V, 0-15A-0)
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDC_LSM2_T30_D12 Series.B12 Page 11 of 12
LSM2-T/30-D12 Series
DOSA-SMT, 30A POL DC/DC Converters
USA: Canada: UK: France: Germany: Japan: China: Singapore:
Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 and 14001 REGISTERED
01/27/09
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. (c) 2008 Murata Power Solutions, Inc.
www.murata-ps.com
MDC_LSM2_T30_D12 Series.B12 Page 12 of 12

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