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advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power modules 4.5vdc ?14.4vdc input; 0.6vdc to 2.0vdc output; 40a output current * ul is a registered trademark of underwriters laboratories, inc. document no: ds11-016 ver. 0.2 ? csa is a registered trademark of canadian standards association. pdf name: mvt040a0x.pdf ? vde is a trademark of verband deutscher elektrotechniker e.v. ** iso is a re g istered trademark of the international or g anization of standards features ? compliant to rohs eu directive 2002/95/ec (z versions) ? compatible in a pb-free or snpb reflow environment (z versions)`+ ? wide input voltage range (4.5vdc-14.4vdc) ? output voltage programmable from 0.6vdc to 2.0vdc via external resistor ? tunable loop tm to optimize dynamic output voltage response ? power good signal ? fixed switching frequency with capability of external synchronization ? output overcurrent protection (non-latching) ? overtemperature protection ? remote on/off ? ability to sink and source current ? cost efficient open frame design ? small size: 33.02 mm x 13.46 mm x 10.9 mm (1.3 in x 0.53 in x 0.429 in) ? wide operating temperature range [-40c to 105c] ? ruggedized (-d) version able to withstand high levels of shock and vibration ? ul * 60950-1 2 nd ed. recognized, csa ? c22.2 no. 60950-1-07 certified, and vde ? (en60950- 1 2 nd ed.) licensed ? iso** 9001 and iso 14001 certified manufacturing facilities applications ? distributed power architectures ? intermediate bus voltage applications ? telecommunications equipment ? servers and storage applications ? networking equipment ? industrial equipment description the 40a analog mega dlynx tm power modules are non-isolated dc-dc converters that can deliver up to 40a of output current. these modules operate over a wide range of input voltage (v in = 4.5vdc-14.4vdc) and provide a precisely regulated output voltage from 0.6vdc to 2.0vdc, programmable via an external resistor. features include remote on/off, adjustable output voltage, over current and overtemperature protection. the module also includes the tunable loop tm feature that allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and pwb area. a ddr0 trim vout vs+ sync rtune ctune rtrim vin co cin vout+ vin+ on/off seq module pgood sig_gnd raddr0 vs- gnd gnd rohs compliant
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power modules 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 2 absolute maximum ratings stresses in excess of the absolute maximum ratings can cause permanent damage to the device. these are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. parameter device symbol min max unit input voltage all v in -0.3 15 vdc continuous operating ambient temperature all t a -40 105 c (see thermal considerations section) storage temperature all t stg -55 125 c electrical specifications unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. parameter device symbol min typ max unit operating input voltage all v in 4.5 ? 14.4 vdc maximum input current all i in,max tbd adc (v in =4.5v to 14v, i o =i o, max ) input no load current (v in = 12.0vdc, i o = 0, module enabled) v o,set = 0.6 vdc i in,no load tbd ma v o,set = 2vdc i in,no load tbd ma input stand-by current (v in = 12.0vdc, module disabled) all i in,stand-by tbd ma inrush transient all i 2 t 1 a 2 s input reflected ripple current, peak-to-peak (5hz to 20mhz, 1 h source impedance; v in =0 to 14v , i o = i omax ; see test configurations) all tbd map-p input ripple rejection (120hz) all tbd db
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 3 electrical specifications (continued) parameter device symbol min typ max unit output voltage set-point (with 0.1% tolerance for external resistor used to set output voltage) all v o, set -1.0 +1.0 % v o, set output voltage (over all operating input voltage, resistive load, and temperature conditions until end of life) all v o, set -3.0 ? +3.0 % v o, set adjustment range (selected by an external resistor) (some output voltages may not be possible depending on the input voltage ? see feature descriptions section) all v o 0.6 2.0 vdc remote sense range all 0.5 vdc output regulation line (v in =v in, min to v in, max ) all ? 5 mv load (i o =i o, min to i o, max ) all ? 10 mv temperature (t ref =t a, min to t a, max ) all ? 0.4 % v o, set output ripple and noise on nominal output (v in =v in, nom and i o =i o, min to i o, max co = 0.1 f // 22 f ceramic capacitors) peak-to-peak (5hz to 20mhz bandwidth) all ? 50 100 mv pk-pk rms (5hz to 20mhz bandwidth) all 20 38 mv rms external capacitance 1 without the tunable loop tm esr 1 m ? all c o, max 0 ? tbd f with the tunable loop tm esr 0.15 m ? all c o, max 0 ? tbd f esr 10 m ? all c o, max 0 ? tbd f output current (in either sink or source mode) all i o 0 40 adc output current limit inception (hiccup mode) (current limit does not operate in sink mode) all i o, lim tbd % i o,max output short-circuit current all i o, s/c tbd ma (v o 250mv) ( hiccup mode ) efficiency v o,set = 0.6vdc tbd % v in = 12vdc, t a =25c v o,set = 1.2vdc tbd % i o =i o, max , v o = v o,set v o,set = 1.8vdc tbd % switching frequency all f sw ? tbd ? khz frequency synchronization all synchronization frequency range all 510 720 khz high-level input voltage all v ih 2.0 v low-level input voltage all v il 0.4 v input current, sync all i sync 100 na minimum pulse width, sync all t sync 100 ns maximum sync rise time all t sync_sh 100 ns external capacitors may require using the new tunable loop tm feature to ensure that the module is stable as well as getting the best transient response. see the tunable loop tm section for details.
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 4 general specifications parameter device min typ max unit calculated mtbf (i o =0.8i o, max , t a =40c) telecordia issue 2 method 1 case 3 all tbd hours weight ? tbd ? g (oz.) feature specifications unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. see feature descriptions for additional information. parameter device symbol min typ max unit on/off signal interface (v in =v in, min to v in, max ; open collector or equivalent, signal referenced to gnd) device is with suffix ?4? ? positive logic (see ordering information) logic high (module on) input high current all i ih ? tbd a input high voltage all v ih tbd ? v in,max v logic low (module off) input low current all i il ? ? tbd ma input low voltage all v il -0.3 ? tbd v device code with no suffix ? negative logic (see ordering information) (on/off pin is open collector/drain logic input with external pull-up resistor; signal referenced to gnd) logic high (module off) input high current all i ih D D tbd ma input high voltage all v ih tbd D v in, max vdc logic low (module on) input low current all i il D D tbd a input low voltage all v il -0.2 D tbd vdc turn-on delay and rise times (v in =v in, nom , i o =i o, max , v o to within 1% of steady state) case 1: on/off input is enabled and then input power is applied (delay from instant at which v in = v in, min until v o = 10% of v o, set ) all tdelay D 1.1 D msec case 2: input power is applied for at least one second and then the on/off input is enabled (delay from instant at which von/off is enabled until v o = 10% of v o, set ) all tdelay D 700 D sec output voltage rise time (time for v o to rise from 10% of vo, set to 90% of vo, set) all trise D 3.1 D msec output voltage overshoot (t a = 25 o c v in = v in, min to v in, max ,i o = i o, min to i o, max ) with or without maximum external capacitance 3.0 % v o, set output voltage overshoot (t a = 25 o c v in = v in, min to v in, max ,i o = i o, min to i o, max ) with or without maximum external capacitance 3.0 % v o, set over temperature protection (see thermal considerations section) all t ref 145 c
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 5 feature specifications (cont.) parameter device symbol min typ max units tracking accuracy (power-up: 2v/ms) all v seq ?v o 100 mv (power-down: 2v/ms) all v seq ?v o 100 mv (v in, min to v in, max ; i o, min to i o, max v seq < v o ) input undervoltage lockout turn-on threshold all 2.475 3.025 vdc turn-off threshold all 2.25 2.75 vdc hysteresis all 0.25 vdc pgood (power good) signal interface open drain, v supply 5vdc overvoltage threshold for pgood on 108 %v o, set overvoltage threshold for pgood off 105 %v o, set undervoltage threshold for pgood on 110 %v o, set undervoltage threshold for pgood off 90 %v o, set pulldown resistance of pgood pin all 50
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 6 design considerations input filtering the 40a analog mega dlynx tm module should be connected to a low ac-impedance source. a highly inductive source can affect the stability of the module. an input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. to minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. figure 1 shows the input ripple voltage for various output voltages at 40a of load current with tbd f or tbd f ceramic capacitors and an input of 12v. tbd figure 1. input ripple voltage for various output voltages with tbd f or tbd f ceramic capacitors at the input (40a load). input voltage is 12v. output filtering these modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 f ceramic and tbd f ceramic capacitors at the output of the module. however, additional output filtering may be required by the system designer for a number of reasons. first, there may be a need to further reduce the output ripple and noise of the module. second, the dynamic response characteristics may need to be customized to a particular load step change. to reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. low esr polymer and ceramic capacitors are recommended to improve the dynamic response of the module. figure 2 provides output ripple information for different external capacitance values at various vo and a full load current of 40a. for stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. optimal performance of the module can be achieved by using the tunable loop tm feature described later in this data sheet. tbd figure 2. output ripple voltage for various output voltages with external tbd ceramic capacitors at the output (40a load). input voltage is 12v. safety considerations for safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., ul 60950-1 2nd, csa c22.2 no. 60950-1-07, din en 60950-1:2006 + a11 (vde0805 teil 1 + a11):2009-11; en 60950-1:2006 + a11:2009- 03. for the converter output to be considered meeting the requirements of safety extra-low voltage (selv), the input must meet selv requirements. the power module has extra-low voltage (elv) outputs when all inputs are elv. the input to these units is to be provided with a fast- acting fuse with a maximum rating of tbd a in the positive input lead .
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 7 feature descriptions remote on/off the 40a analog mega dlynx tm power modules feature an on/off pin for remote on/off operation. two on/off logic options are available. in the positive logic on/off option, (device code suffix ?4? ? see ordering information), the module turns on during a logic high on the on/off pin and turns off during a logic low. with the negative logic on/off option, (no device code suffix, see ordering information), the module turns off during logic high and on during logic low. the on/off signal should be always referenced to ground. for either on/off logic option, leaving the on/off pin disconnected will turn the module on when input voltage is present. monotonic start-up and shutdown the module has monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range. startup into pre-biased output the module can start into a prebiased output as long as the prebias voltage is 0.5v less than the set output voltage. output voltage programming the output voltage of the module is programmable to any voltage from 0.6dc to 2vdc by connecting a resistor between the trim and sig_gnd pins of the module. without an external resistor between trim and sig_gnd pins, the output of the module will be 0.6vdc. to calculate the value of the trim resistor, rtrim for a desired output voltage, should be as per the following equation: () ? ? ? ? ? ? ? = k vo rtrim 6 . 0 12 rtrim is the external resistor in k ? vo is the desired output voltage. table 1 provides rtrim values required for some common output voltages. v o (+) trim vs load v in (+) on/off vs+ sig_gnd caution ? do not connect sig_gnd to gnd elsewhere in the layout figure 3. circuit configuration for programming output voltage using an external resistor. table 1 v o, set (v) rtrim ( k ? ) 0.6 open 0.9 40 1.0 30 1.2 20 1.5 13.33 1.8 10 remote sense the power module has a remote sense feature to minimize the effects of distribution losses by regulating the voltage at the sense pin. the voltage between the sense pin and vout pin should not exceed 0.5v. voltage margining output voltage margining can be implemented in the module by connecting a resistor, r margin-up , from the trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, r margin-down , from the trim pin to output pin for margining-down. figure 4 shows the circuit configuration for output voltage margining figure 4. circuit configuration for margining output voltage. output voltage sequencing the power module includes a sequencing feature, ez- sequence that enables users to implement various types of output voltage sequencing in their applications. this is accomplished via an additional sequencing pin. when not using the sequencing feature, leave it unconnected. the voltage applied to the seq pin should be scaled down by the same ratio as used to scale the output voltage down to the reference voltage of the module. this is accomplished by an external resistive divider vo module sig_gnd trim q1 rtrim rmargin-up q2 rmargin-down
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 8 connected across the sequencing voltage before it is fed to the seq pin as shown in fig. 5. figure 5. circuit showing connection of the sequencing signal to the seq pin. when the scaled down sequencing voltage is applied to the seq pin, the output voltage tracks this voltage until the output reaches the set-point voltage. the final value of the sequencing voltage must be set higher than the set-point voltage of the module. the output voltage follows the sequencing voltage on a one-to- one basis. by connecting multiple modules together, multiple modules can track their output voltages to the voltage applied on the seq pin. to initiate simultaneous shutdown of the modules, the seq pin voltage is lowered in a controlled manner. the output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. a valid input voltage must be maintained until the tracking and output voltages reach ground potential. overcurrent protection to provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. at the point of current-limit inception, the unit enters hiccup mode. the unit operates normally once the output current is brought back into its specified range. overtemperature protection to provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. the unit will shut down if the overtemperature threshold of tbd o c(typ) is exceeded at the thermal reference point t ref .once the unit goes into thermal shutdown it will then wait to cool before attempting to restart. input undervoltage lockout at input voltages below the input undervoltage lockout limit, the module operation is disabled. the module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold. synchronization the module switching frequency can be synchronized to a signal with an external frequency within a specified range. synchronization can be done by using the external signal applied to the sync pin of the module as shown in fig. 6, with the converter being synchronized by the rising edge of the external signal. the electrical specifications table specifies the requirements of the external sync signal. if the sync pin is not used, the module should free run at the default switching frequency. if synchronization is not being used, connect the sync pin to gnd. module sync gnd + figure 6. external source connections to synchronize switching frequency of the module. dual layout identical dimensions and pin layout of analog and digital mega dlynx modules permit migration from one to the other without needing to change the layout. in both cases the trim resistor is connected between trim and signal ground. power good the module provides a power good (pgood) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. the pgood signal will be de-asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going 10% outside the setpoint value. the pgood terminal can be connected through a pullup resistor (suggested value 100k ) to a source of 5vdc or lower. tunable loop tm the module has a feature that optimizes transient response of the module called tunable loop tm . external capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. larger values of external capacitance could also cause the module to become unstable. the tunable loop tm allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. the tunable loop tm is implemented by connecting a series r-c between the vs+ and trim pins of the module, as shown in fig. 7. this r-c allows the user to 100 pf dlynx module r1=rtrim 20k sig_gnd seq seq v
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 9 externally adjust the voltage loop feedback compensation of the module. figure. 7. circuit diagram showing connection of r tume and c tune to tune the control loop of the module. table 2. general recommended values of of r tune and c tune for vin=12v and various external ceramic capacitor combinations. tbd table 3. recommended values of r tune and c tune to obtain transient deviation of 2% of vout for a 20a step load with vin=12v. tbd vs+ module sig_gnd trim vout rtune ctune rtrim co gnd
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 10 thermal considerations power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help ensure reliable operation. considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. a reduction in the operating temperature of the module will result in an increase in reliability. the thermal data presented here is based on physical measurements taken in a wind tunnel. the test set-up is shown in figure 8. the preferred airflow direction for the module is in figure 9. a i r flow x power module w ind tunnel pwbs 12.7_ (0.50) 76.2_ (3.0) probe location for measuring airflow and ambient temperature 25.4_ (1.0) figure 8. thermal test setup. the thermal reference points, t ref used in the specifications are also shown in figure 9. for reliable operation the temperatures at these points should not exceed 120 o c. the output power of the module should not exceed the rated power of the module (vo,set x io,max). please refer to the application note ?thermal characterization process for open-frame board- mounted power modules? for a detailed discussion of thermal aspects including maximum device temperatures. figure 9. preferred airflow direction and location of hot-spot of the module (tref).
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 11 example application circuit requirements: vin: 12v vout: 1.8v iout: 30a max., worst case load transient is from 20a to 30a vout: 1.5% of vout (27mv) for worst case load transient vin, ripple 1.5% of vin (180mv, p-p) ci1 tbd ci2 tbd co1 tbd co2 tbd ctune tbd rtune tbd rtrim 10k smt resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%) data clk vs- gnd vin+ ci2 co2 a ddr0 vout vs+ gnd trim ctune rtune rtrim vin co1 ci1 vout+ on/off seq module pgood sig_gnd sync vs-
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 12 mechanical outline dimensions are in millimeters and (inches). tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.) pin function pin function 1 on/off 11 sig_gnd 2 vin 12 vs- 3 seq 13 nc 4 gnd 14 nc 5 vout 15 sync 6 trim 16 pg 7 vs+ 17 nc 8 gnd 18 nc 9 share 19 nc 10 gnd 14 13 12 10 11 19 18 17 16 15 1 9 7 6 5 4 3 8 2 side view bottom v iew
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 13 recommended pad layout dimensions are in millimeters and (inches). tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.) pin function pin function 1 on/off 11 sig_gnd 2 vin 12 vs- 3 seq 13 nc 4 gnd 14 nc 5 vout 15 sync 6 trim 16 pg 7 vs+ 17 nc 8 gnd 18 nc 9 share 19 nc 10 gnd nc
advance data sheet november 17, 2011 40a analog mega dlynx tm : non-isolated dc-dc power module 4.5 ? 14.4vdc input; 0.6vdc to 2vdc output; 40a output current lineage power 14 document no: ds11-016 ver. 0.2 pdf name: mvt040a0x.pdf ordering information please contact your lineage power sales representative for pricing, availability and optional features. table 6. device codes device code input voltage range output voltage output current on/off logic sequencing comcodes mvt040a0x3-srphz 4.5 ? 14.4vdc 0.6 ? 2.0vdc 40a negative yes cc109159785 mvt040a0x43 -srphz 4.5 ? 14.4vdc 0.6 ? 2.0vdc 40a positive yes cc109159793 -z refers to rohs compliant parts table 7. device codes package identifier family input voltage range output current output voltage on/off logic options rohs compliance m v t 040a0 x 4 -sr -p -h z p=pico u=micro m=mega g=giga d=dlynx digital v=dlynx analog. t=with ez_sequence x=without sequencing 40a x = programmable output 4 = positive no entry = negative s = surface mount r = tape & reel paralleling 2 extra ground pins z = rohs6 world wide headquarters lineage power corporation 601 shiloh road, plano, tx 75074, usa +1-888-lineage(546-3243) (outside u.s.a.: +1-972-244-watt(9288) ) www.lineagepower.com e-mail: techsupport1@lineagepower.com asia-pacific headquarters tel: +86.021.54279977*808 europe, middle-east and africa headquarters tel: +49.89.878067-280 india headquarters tel: +91.80.28411633 lineage power reserves the right to make changes to the product(s) or information contained herein without notice. no liability is assumed as a result of their use or a pplication. no rights under any patent accompany the sale of any such product(s) or information. lineage power dc-dc products are protected under various patents. information on these patents is available at www.lineagepower.com/patents . ? 2011 lineage power corporation, (plano, texas) all international rights reserved.

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