LSS-T/10-W12 www.murata-ps.com Adjustable Output 10 Amp SIP-mount DC/DC Converter PRODUCT PROD DUCT OVE OVERVIEW ERVIEW NOT RECOMMENDED FOR NEW DESIGNS FEATURES Vertical SIP-mount small footprint package Output from 0.6 to 6 Volts up to 51 Watts Ultra-wide 4.5 to 13.8 Vdc input range Fabriicated on a SSingle ingle Inline Pack k Fabricated Package (SIP) module, LSS-T/10-W112 series is a min n the LSS-T/10-W12 miniature non-isoPoint-of-Looad (POL) sw witchinn DC/DC power latedd Point-of-Load switching licatioo The converter converter for embedded appl applications. nd hig g efficiency offerss both tight regulation an and high direcctly at the po ower usage ssite. ite. TTypically, no extra directly power outside components required. componeents are requ uired The module mounts vertically, occupying a tiny board footprint. The upright mounting improves cooling airflow. Suggested applications include powering CPU’s, distributed bus architectures (DBA) with a master bus power supply, programmable logic and mixed voltage systems. Based on synchronous buck converter topology, the extraordinary efficiency means very low heat and little electrical noise. The ultra wide input range is 4.5 to 13.8 Volts. Additional features include quick transient response to step loads and stable no-load operation. A key feature is selectable output voltage either by precision resistor, trim pot or user’s voltage input. The output range is adjustable from 0.6 to 6 Vdc. A wealth of protection features prevents damage to both the converter and outside circuits. Inputs are protected from undervoltage and outputs offer short circuit protection, overcurrent and excess temperature shut down. The unit is designed to meet all EMI/RFI certifications as well as HALT reliability. RoHS6 hazardous material compliance is specified as standard. All units are precision assembled in a highly automated computercontrolled surface mount facility with ISO-traceable manufacturing quality standards. Additional system functions include a remote On/Off control. Outstanding thermal performance and derating Extensive self-protection and short circuit features with no output reverse conduction On/Off control and trim functions High efficiency up to 93% with no heatsink Fully protected against temperature and voltage limits Designed to meet UL/IEC/EN60950-1 safety approvals Simplified Block Diagram +VIN +VOUT PWM Controller On/Off Control OT Common Common Signal Conditioning Trim Typical topology is shown. For full details go to www.murata-ps.com/rohs Figure 1. LSS-T/10-W12 Series, 10 Amp Model www.murata-ps.com/support MDC_MDC_LSS-T10-W12.A06 Page 1 of 8 LSS-T/10-W12 Adjustable Output 10 Amp SIP-mount DC/DC Converter Performance Specifications and Ordering Guide ➁ ORDERING GUIDE Output Root Model ➁ VOUT (Volts) LSS-T/10-W12 0.591 – 6 Input R/N (mVp-p)➁ Regulation (Max.)➂ IOUT (Amps Power VIN Nom. max) (Watts) Typ. Max. Line Load (Volts) 10 60 45 75 ±0.2% ±1.4% ➀ Dimensions are in inches (mm). ➁ All specifications are at nominal line voltage, VOUT = 5V and full load, +25 °C unless otherwise noted. See detailed specifications. Output capacitors are 2 x 0.47 μF ceramic. Input cap is 22 μF. 12 Package Range (Volts) IIN, no load (mA) IIN, full load (Amps) 4.5 – 13.8 80 4.48 Efficiency Case C72 ➀ Pinout 0.41 × 0.65 × 0.4 (10.4 × 16.5 × 10.2) P73 Min. Typ. 91.5 93 I/O caps are necessary for our test equipment and may not be needed for your application. ➂ VIN must be 2V or higher than VOUT for 3.3 to 5V outputs. PART NUMBER STRUCTURE L SS - T / 10 - W12 - C Output Configuration: L = Unipolar Low Voltage RoHS Hazardous Substance Compliance C = RoHS6 (does not claim EU RoHS exemption 7b–lead in solder) Non-Isolated SIP Output Voltage Range T = Trimmable, 0.6 – 6 Volts Wide Input Voltage Range W12 = 4.5 – 13.8 Volts (10Amp) Maximum Rated Output Current in Amps MECHANICAL SPECIFICATIONS 0.41 (10.4) 0.38 MAX (9.7) INPUT/OUTPUT CONNECTIONS LSS-T/10-W12 0.24 MAX (6.1) 0.205 REF (5.2) Pin 1 2 3 4 5 0.65 (16.5) 0.12 (3.0) Function P73 Enable On/Off +VIN Ground +VOUT Output Trim Dimensions are in inches (mm) shown for ref. only. 0.06 REF THK (1.5) 0.067 (1.7) 0.067 (1.7) Third Angle Projection 0.05 (1.3) 0.134 (3.4) 0.134 (3.4) Figure 2 . LSS-T/10-W12 Series Component locations are typical. .032 (0.8) ±.002 OR .025 (0.6) ±.002 TYP Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only. www.murata-ps.com/support MDC_MDC_LSS-T10-W12.A06 Page 2 of 8 LSS-T/10-W12 Adjustable Output 10 Amp SIP-mount DC/DC Converter Performance/Functional Specifications Dynamic Characteristics All specifications are typical unless noted See Note 1. Input Input Voltage Range Recommended External Fuse Isolation See Ordering Guide. See note 19. 20 Amps Not isolated. The input and output commons internally connected. Start-up Voltage 4.2 Volts Undervoltage Shutdown 3.4 Volts Overvoltage Shutdown None Reflected (Back) Ripple Current 20 mA pk-pk Internal Input Filter Type Capacitive Reverse Polarity Protection1(Note 15) See fuse information Input Current: Full Load Conditions Inrush Transient Shutdown mode (Off, UV, OT) Output Short-Circuit No load, 5VOUT Low Line (VIN = Vmin, 5VOUT) Remote On/Off Control (Note 5) (LSS-T/10-W12, no suffix) Positive Logic See Ordering Guide 0.4 A2 sec 5 mA 60 mA 80 mA 11.95 Amps On = +1.5 V to plus VIN max. or open pin Off = 0 to +0.2 V max. or ground pin 1 mA Current Dynamic Load Response 20 μSec to within ±2% of final value (0 to 50% load step, di/dt = 10A/μSec, no external caps) Turn-On Time 6 mSec for VOUT regulated Remote On/Off Time 6 mSec for VOUT regulated Switching Frequency 600 kHz Environmental Calculated MTBF (Note 4) Operating Temperature Range With Derating TBC –45 to +85°C (Note 9) See Derating Curves (Note 18) Storage Temperature Range –55 to +125°C Thermal Protection Shutdown +115°C Relative Humidity 85%/+85°C Physical Outline Dimensions Weight See Mechanical Specifications 0.07 ounces (2 grams) Electromagnetic Interference (may require external filter) Designed to meet FCC Part 15, EN55022, conducted and radiated Safety Designed to meet UL/cUL 60950-1, CSA-C22.2 No. 60950-1, IEC/EN 60950-1 Absolute Maximum Ratings Output Input Voltage Continuous or transient 15 Volts max. Output Power 51 Watts max. On/Off Control 0V. min to +VIN max. Input Reverse-Polarity Protection See Fuse section ±0.02% max. per °C of VOUT range See Ordering Guide and Note 8 See Ordering Guide and Note 10 See Ordering Guide Output Current Current limited. Devices can withstand sustained output short circuits without damage. 5,000 μF 10,000 μF 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 not implied nor recommended. Minimum Loading (Note 7) Maximum Output Power No minimum load 51 Watts (Note 11) Accuracy (50% load) ±1.5% of V setting Voltage Adjustment Range (Notes 13, 19) Temperature Coefficient Ripple/Noise (20MHz bandwidth) Line Load Regulation (See Tech Notes) Efficiency Maximum Capacitive Loading Cap-ESR = 0.001 to 0.01 Ω Cap-ESR > 0.01 Ω See Ordering Guide Current Limit Inception (98% of VOUT setting) (Note 12) 33 Amps (after warm up) Short Circuit Mode (Note 6, 12) Short Circuit Current Output 0.6 Amp Protection Method Hiccup autorecovery upon overload removal. (Note 16) Short Circuit Duration Continuous, no damage (output shorted to ground) Storage Temperature –40 to +125°C Lead Temperature See soldering guidelines CAUTION: This product is not internally fused. To comply with safety agency certifications and to avoid injury to personnel or equipment, the user must supply an external fast-blow fuse to the input terminals. See fuse information. www.murata-ps.com/support MDC_MDC_LSS-T10-W12.A06 Page 3 of 8 LSS-T/10-W12 Adjustable Output 10 Amp SIP-mount DC/DC Converter Notes (1) All models are tested and specified with external 1||10 μF 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. All specifications are typical unless noted. General conditions for Specifications are +25 °C, VIN=nominal, VOUT=5V, full load. Adequate airflow must be supplied for extended testing under power. (2) Input Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is CIN=2 × 100 μF, 100V tantalum, CBUS=1000 μF, 100V 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. All Derating curves are presented at sea level altitude. Be aware of reduced power dissipation with increasing density altitude. (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 is normally controlled by a switch or open collector or open drain transistor. But it may also be driven with external logic or by applying appropriate external voltages which are referenced to Input Common. (6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. (7) The outputs are not intended to sink appreciable reverse current. This may damage the outputs. (8) Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise Reduction. Use only as much output filtering as needed and no more. Larger caps may slow transient response or degrade dynamic performance. Thoroughly test your system under full load, especially with low-ESR ceramic capacitors. (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) For the LSS-T/10-W12, the maximum rated output power is 51 Watts (5.1 Volts and 10 Amps). Output adjustment up to 6 Volts must reduce current to remain within the 51 Watt output limit. (12) Output current limit and short circuit protection is non-latching. When the overcurrent fault is removed, the converter will immediately recover. (13) Do not exceed maximum power specifications when adjusting the output trim. (14) At zero output current, the output may contain low frequency components which exceed the ripple specification. The output may be operated indefinitely with no load. (15) Input Fusing: If reverse polarity is accidentally applied to the input, a body diode will become forward biased and will conduct considerable current. To ensure reverse input protection with full output load, always connect an external input fast-blow fuse in series with the +VIN input. Use approximately twice the full input current rating with nominal input voltage. (16) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. If the overcurrent condition still exists, the restart current will be removed and then tried again. This short current pulse prevents overheating and damaging the converter. Once the fault is removed, the converter immediately recovers normal operation. (17) Output accuracy is dependent on user-supplied trim resistors. To achieve high accuracy, use ±1% or better tolerance metal-film resistors. (18) At full power, on-board component package temperatures must not exceed +128°C. (19) VIN must be 2 Volts or higher than VOUT for +3.3 to +5V outputs. Trim Connections +VOUT RTRIM Trim RLOAD Ground RTRIM (kΩ) = 1.182 VOUT − 0.591 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. Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: For Sn/Pb based solders: Maximum Preheat Temperature 115° C. Maximum Preheat Temperature 105° C. Maximum Pot Temperature 270° C. Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 7 seconds Maximum Solder Dwell Time 6 seconds www.murata-ps.com/support MDC_MDC_LSS-T10-W12.A06 Page 4 of 8 LSS-T/10-W12 Adjustable Output 10 Amp SIP-mount DC/DC Converter PERFORMANCE DATA: EFFICIENCY VS LINE VOLTAGE AND LOAD CURRENT Ta = +25°C VOUT = 1.2V VOUT = 3.3V 92% 98% 90% 96% 88% 94% 86% 92% VIN = 4.5 V VIN = 12 V VIN = 14 V 90% 82% VIN = 7 V 80% VIN = 12 V 78% VIN = 14 V Efficiency (%) Efficiency (%) 84% 88% 86% 84% 76% 82% 74% 80% 72% 78% 70% 76% 68% 1A 2A 3A 4A 5A 6A 7A 8A 9A 1A 10A 2A 3A 4A Load Current (Amps) 5A 6A 7A 8A 9A 10A 7A 8A 9A 10A 7A 8A 9A 10A Load Current (Amps) VOUT = 1.8V VOUT = 5V 96% 100% 94% 98% 92% 96% 90% 94% 88% Efficiency (%) 84% 82% VIN = 7 V 90% VIN = 12 V 88% VIN = 14 V 86% 80% 84% 78% 76% 82% 74% 80% 72% 78% 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A 1A 2A 3A 4A Load Current (Amps) 5A 6A Load Current (Amps) VOUT = 6V 100% 98% 96% 94% VIN = 7 V 92% Efficiency (%) Efficiency (%) 92% VIN = 4.5 V VIN = 12 V VIN = 14 V 86% VIN = 12 V 90% VIN = 14 V 88% 86% 84% 82% 80% 78% 1A 2A 3A 4A 5A 6A Load Current (Amps) www.murata-ps.com/support MDC_MDC_LSS-T10-W12.A06 Page 5 of 8 LSS-T/10-W12 Adjustable Output 10 Amp SIP-mount DC/DC Converter PERFORMANCE DATA: MAXIMUM CURRENT TEMPERATURE DERATING (VIN = 12V, transverse airflow, at sea level) VOUT = 1.2V VOUT = 2.5V 10.00 9.75 300 LFM 400 LFM 9.50 9.25 9.00 Output Current (Amps) 8.75 8.25 Natural a Convection 100 LFM 200 LFM 8.00 7.75 7.50 7.25 7.00 6.75 6.50 6.25 6.00 5.75 5.50 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 300 LFM 400 LFM Natural Convection 100 LFM 200 LFM 20 25 30 35 40 Ambient Temperature (°C) 45 300 LFM 400 LFM 9.75 9.50 9.25 Output Current (Amps) 9.00 8.75 8.50 8.25 Natural Convection 100 LFM 200 LFM 7.75 7.50 7.25 7.00 6.75 6.50 6.25 6.00 5.75 5.50 25 30 35 40 45 50 55 60 65 70 75 80 85 10.03 9.78 9.53 9.28 9.03 8.78 8.53 8.28 8.03 7.78 7.53 7.28 7.03 6.78 6.53 6.28 6.03 5.78 5.53 5.28 5.03 4.78 4.53 60 65 70 75 80 85 90 70 75 80 85 90 70 75 80 85 90 300 LFM 400 LFM Natural Convection 100 LFM 200 LFM 20 90 25 30 35 40 45 50 55 60 65 Ambient Temperature (ºC) Ambient Temperature (°C) VOUT = 5V Output Current (Amps) 20 55 VOUT = 3.3V 10.00 8.00 50 Ambient Temperature (°C) VOUT = 1.8V Output Current (Amps) Output Current (Amps) s 8.50 10.03 9.78 9.53 9.28 9.03 8.78 8.53 8.28 8.03 7.78 7.53 7.28 7.03 6.78 6.53 6.28 6.03 5.78 5.53 5.28 5.03 4.78 4.53 10.03 9.78 9.53 9.28 9.03 8.78 8.53 8.28 8.03 7.78 7.53 7.28 7.03 6.78 6.53 6.28 6.03 5.78 5.53 5.28 5.03 4.78 4.53 300 LFM 400 LFM Natural Convection 100 LFM 200 LFM 20 25 30 35 40 45 50 55 60 65 Ambient Temperature (°C) www.murata-ps.com/support MDC_MDC_LSS-T10-W12.A06 Page 6 of 8 LSS-T/10-W12 Adjustable Output 10 Amp SIP-mount DC/DC Converter PERFORMANCE DATA: OUTPUT RIPPLE AND NOISE (PARD) VIN = 12V VOUT = 1.2V VOUT = 3.3V VOUT = 1.8V VOUT = 5V VOUT = 2.5V VOUT = 6V www.murata-ps.com/support MDC_MDC_LSS-T10-W12.A06 Page 7 of 8 LSS-T/10-W12 Adjustable Output 10 Amp SIP-mount DC/DC Converter PERFORMANCE DATA: TURN-ON, TURN-OFF TIMES VIN = 12V On/Off Enable VIN Power On On/Off Disable VIN Power Off Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED 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. © 2011 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_MDC_LSS-T10-W12.A06 Page 8 of 8