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general description the max5058 evaluation kit (ev kit) is a fully assembled and tested circuit board that contains a high-efficiency, 50w, isolated, synchronously rectified forward convert- er in the industry-standard 1/8th brick pinout. the cir- cuit is configured for a +3.3v output voltage and pro- vides up to 15a of output current. the circuit can be powered from either a +36v to +72v or -36v to -72v dc source in applications such as telecom/datacom (48v modules), industrial environments, or in automotive 42v power systems. using a clamped two-transistor power topology on the primary side and synchronous rectifiers on the secondary side achieves high efficiency up to 91% and is achieved at 9a. the efficiency improvement on the secondary side is achieved through synchronous rectification using the max5058 secondary-side synchronous rectifier driver and feedback generator controller ic, which drives two n-channel mosfets. additionally, the recovery of stored leakage and magnetizing inductance energy at the pri- mary side contributes to the overall efficiency improve- ment. the primary side uses a max5051 parallelable, clamped, two-switch power-supply controller ic. galvanic isolation up to 500v is achieved with an optocoupler, pulse-signal transformer, and planar surface-mount power transformer. operation at 250khz allows the use of small magnetics and output capacitors. the ev kit provides cycle-by- cycle current-limit protection. additional steady-state fault protection is provided by an integrating fault pro- tection that reduces average dissipated power during continuous short-circuit conditions. the max5051 also has a programmable undervoltage lockout (uvlo). multiple max5058 ev kits can be paralleled for increased power capability when high output current is required. margin-up/down capability enables an increase or decrease in the output voltage. the ev kit demonstrates the max5058 look-ahead signal capabili- ty, on-board error amplifier, and reference voltage source. remote-load voltage sensing allows accurate voltage regulation at the load. warning: the max5058 ev kit is designed to operate with high voltages. dangerous voltages are present on this ev kit and on equipment connected to it. users who power up this ev kit or power the sources connected to it must be careful to follow safety procedures appropriate to working with high- voltage electrical equipment. under severe fault or failure conditions, this ev kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. operate this kit with care to avoid possible personal injury. the user must supply an additional 100? bulk stor- age capacitor between the ev kit? +vin and -vin input terminals before powering up or the max5058 ev kit may be damaged. features ? 50w high-efficiency, isolated forward converter ? synchronously rectified ? differential load-share bus for paralleling ? ?6v to ?2v input range ? +3.3v output at 15a ? v out regulation better than ?.5% over line and load ? 89% efficiency at 48v and 9a ? cycle-by-cycle current-limit protection ? programmable integrating fault protection ? 1/8th brick module pinout ? 250khz switching frequency ? soft-start ? margin-up/down capability ? remote-load voltage sensing ? on-board error amplifier and reference voltage source ? fully assembled and tested evaluates: max5051/max5058 max5058 evaluation kit ________________________________________________________________ maxim integrated products 1 19-3323; rev 0; 6/04 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information part temp range ic package MAX5058EVKIT 0? to +50?* 28 tssop-ep * with 100lfm airflow.
evaluates: max5051/max5058 max5058 evaluation kit 2 _______________________________________________________________________________________ component list designation qty description c1 1 100pf ?%, 50v c0g ceramic capacitor (0603) murata grm1885c1h101g c2 1 390pf ?%, 50v c0g ceramic capacitor (0603) murata grm1885c1h391j c3 1 4.7? ?0%, 10v x5r ceramic capacitor (0805) tdk c2012x5r1a475k c4 1 4.7? ?0%, 6.3v x5r ceramic capacitor (0805) tdk c2012x5r0j475k c5, c40 2 4700pf ?0%, 50v x7r ceramic capacitors (0603) murata grm188r71h472k c6 1 0.1? ?0%, 250v x7r ceramic capacitor (1206) tdk c3216x7r2e104k c7 1 0.22? ?0%, 10v x7r ceramic capacitor (0603) tdk c1608x7r1c224k c8 1 4.7? ?0%, 16v x7r ceramic capacitor (1206) tdk c3216x7r1c475k c9, c29 2 1? ?0%, 16v x7r ceramic capacitors (0805) taiyo yuden emk212bj105kg c10, c11 2 0.47? ?0%, 100v x7r ceramic capacitors (1206) tdk c3216x7r2a474k c12 1 1? ?0%, 100v x7r ceramic capacitor (1210) tdk c3225x7r2a105m c13, c14, c15 3 270?, 4v aluminum organic capacitors (x) kemet a700x277m004ate015 c16 1 3.3? ?0%, 6.3v x5r ceramic capacitor (0805) taiyo yuden jmk212bj335kg designation qty description c17 1 0.33? ?0%, 10v x5r ceramic capacitor (0603) tdk c1608x5r1a334k c18, c24 2 1000pf ?%, 50v c0g ceramic capacitors (0603) tdk c1608c0g1h102j c19, c30, c33 3 1? ?0%, 10v x5r ceramic capacitors (0603) tdk c1608x5r1a105k c20, c37 2 220pf ?0%, 50v c0g ceramic capacitors (0603) tdk c1608c0g1h221k c21 1 4.7?, 80v electrolytic capacitor (6.3mm x 5.8mm) cornell-dubilier afk475m80d16b c22 1 2200pf ?0%, 2kv x7r ceramic capacitor (1812) tdk c4532x7r3d222k c23 1 1000p f, 250v x 7r cer am i c cap aci tor (0603) murata grm188r72e102k c25 1 0.047? ?0%, 100v x7r ceramic capacitor (0805) tdk c2012x7r2a473k c26, c31 2 0.1? ?0%, 16v x7r ceramic capacitors (0603) tdk c1608x7r1c104k c27 1 0.15? ?0%, 16v x7r ceramic capacitor (0603) taiyo yuden emk107bj154ka c28 1 0.047? ?0%, 25v x7r ceramic capacitor (0603) tdk c1608x7r1e473k c32 1 1? ?0%, 25v x7r ceramic capacitor (0805) tdk c2012x7r1e105k
evaluates: max5051/max5058 max5058 evaluation kit _______________________________________________________________________________________ 3 component list (continued) designation qty description c34 1 330pf ?%, 250v c0g ceramic capacitor (0603) tdk c1608c0g2e331j c35, c36 2 1? ?0%, 50v x7r ceramic capacitors (1206) tdk c3216x7r1h105k c38 1 0.068? ?0%, 50v x7r ceramic capacitor (0603) tdk c1608x7r1h683k c39 0 not installed, ceramic capacitor (0603) d1 1 150ma, 100v schottky diode (sod-123) vishay bat46w d2, d3 2 1a, 100v schottky diodes (sma) diodes incorporated b1100 d4 1 3a, 20v schottky diode (sma) diodes incorporated b320a d5, d6, d8, d10, d11 5 250ma, 100v fast-switching diodes (sod-323) diodes incorporated 1n4448hws d7, d9 2 100ma, 30v schottky diodes (sod-523) central semiconductor cmosh-3 l1 1 2.4?, 20a inductor payton 50661 or coilcraft a9860-b* or pulse engineering pa1494-242* n1, n2 2 100v, 7.3a n-channel mosfets (so-8) international rectifier irf7495 n3, n4 2 30v, 20a n-channel mosfets (so-8) international rectifier irf7832 n5 1 170ma, 100v n-channel mosfet (sot23) fairchild bss123 r1, r2 2 19.1k ? ?.1%, 25ppm resistors (0603) panasonic era3eeb1912v r3 1 2.2k ? ?% resistor (0603) designation qty description r4 1 1m ? ?% resistor (0603) r5 1 38.3k ? ?% resistor (0603) r6 1 1m ? ?% resistor (0805) r7, r35 2 0 ? ?% resistors (0603) r8, r9 2 8.2 ? ?% resistors (0603) r10 1 20 ? ?% resistor (1206) r11 1 360 ? ?% resistor (0603) r12 1 34.8k ? ?.5%, 100ppm resistor (0603) panasonic era3ekd3482v r13 1 47 ? ?% resistor (1206) r14 1 270 ? ?% resistor (0603) r15 1 31.6k ? ?% resistor (0603) r16 1 10.5k ? ?% resistor (0603) r17 1 0.027 ? ?% 0.5w resistor (1206) irc lrf-1206-01-r027-f r18 1 4.7 ? ?% resistor (1206) r19 1 475 ? ?% resistor (0805) r20, r36 2 0.004 ? ?% resistors (1206) irc lrf-1206-01-r004-f r21 1 24.9k ? ?% resistor (0805) r22 1 15k ? ?% resistor (1206) r23, r24 2 10 ? ?% resistors (0805) r25 1 47.5k ? ?% resistor (0603) r26 1 0.002 ? ?% resistor (2512) irc lrf-2512-01-r002-j r27 1 10 ? ?% resistor (0603) r28 1 301 ? ?% resistor (0805) r29 1 1 ? ?% resistor (0603) r30 1 2k ? ?% resistor (0603) r31 1 220 ? ?% resistor (0603) r32 1 698k ? ?% resistor (0805) panasonic erja6enf6983v r33 1 604k ? ?% resistor (0805) panasonic erj6enf6043v r34 1 220k ? ?% resistor (0603) r37, r38 2 10 ? ?% resistors (0603) r39 1 2k ? ?% resistor (1206) r40 1 32.4k ? ?% resistor (0603)
evaluates: max5051/max5058 max5058 evaluation kit 4 _______________________________________________________________________________________ quick start required equipment 36v to 72v power supply capable of providing up to 3a voltmeter ? fan to provide at least 100lfm airflow for extended operation at 15a 100?, 100v bulk storage capacitor to be connected to the input terminals of the ev kit the max5058 ev kit is fully assembled and tested. follow these steps to verify board operation. do not turn on the power supply until all connections are completed. component list (continued) component suppliers designation qty description t1 1 planar transformer pulse engineering pa0370 t2 1 drive transformer pulse engineering pe-68386 u1 1 parallelable, clamped, two-switch power-supply controller maxim max5051aui (28 tssop-ep) u2 1 high-voltage optocoupler (ultra-small flat-lead) cel/nec ps2913-1-m designation qty description u3 1 s econd ar y- si d e synchr onous r ecti fi er d r i ver and feed b ack g ener ator contr ol l er maxim max5058e ui (28-pi n t ssop-e p) +vin, -vin, on/off 3 0.040in pc pins vout, sgnd 2 0.062in pc pins none 1 max5058 pc board * modifications to the pc board traces are required to evaluate this component. note: indicate that you are using the max5058 when contacting these component suppliers. supplier phone fax website cel/nec; california eastern laboratories 800-997-5227 408-588-2213 www.cel.com coilcraft 847-639-6400 847-639-1469 www.coilcraft.com cornell dubilier 508-996-8564 508-336-3830 www.cornell-dubilier.com diodes inc 805-446-4800 805-446-4850 www.diodes.com fairchild 888-522-5372 www.fairchildsemi.com international rectifier 310-322-3331 310-726-8721 www.irf.com irc 361-992-7900 361-992-3377 www.irctt.com kemet 864-963-6300 864-963-6322 www.kemet.com murata 770-436-1300 770-436-3030 www.murata.com panasonic 714-373-7366 714-737-7323 www.panasonic.com payton planar magnetics ltd. 561-969-9585 561-989-9587 www.paytongroup.com pulse engineering 858-674-8100 858-674-8262 www.pulseeng.com taiyo yuden 800-348-2496 847-925-0899 www.t-yuden.com tdk 847-803-6100 847-390-4405 www.component.tdk.com vishay www.vishay.com
evaluates: max5051/max5058 max5058 evaluation kit _______________________________________________________________________________________ 5 no load output 1) connect a voltmeter to the vout and sgnd pins to measure the output voltage. 2) connect the positive terminal of a 36v to 72v power supply to the +vin terminal. connect the power supply? ground to the -vin terminal. 3) turn on the power supply above 36v and verify that the voltmeter reads +3.3v. note: for improved voltage regulation at the load, con- nect a 22-gauge twisted-pair cable from the vs+ and vs- terminals of the max5058 ev kit, to the load posi- tive and ground terminals, respectively. connect the vout and sgnd terminals to the load with power cables sized to carry the full load current, up to 15a. detailed description the max5058 ev kit is a 50w, isolated, synchronously rectified forward converter that provides +3.3v at up to 15a output. the circuit can be powered from a 36v to 72v dc source. the user must supply an additional 100? bulk storage capacitor between the +vin and -vin input terminals before powering up or the max5058 ev kit may be damaged. this capacitor should be rated for 100v and be able to carry 1.5a of ripple current. lower ripple-current-rated capacitors should be acceptable for short-term operation. the 50w forward converter achieves high efficiency by using a clamped two-transistor power topology at the primary input and synchronous rectifiers on the sec- ondary output side. a max5051 parallelable, clamped, two-switch, power-supply controller ic switches the two primary-side, 100v-rated transistors, n1 and n2. a max5058 secondary-side synchronous rectifier driver and feedback generator controller ic drives two sur- face-mount so-8 n-channel 30v-rated mosfets con- figured as synchronous rectifiers on the secondary side. mosfet n3 provides secondary-side rectification and mosfet n4 synchronously rectifies the current flowing through freewheeling diode d4. the pc board footprint is minimized by using surface- mount so-8 n-channel mosfets on the primary side. cycle-by-cycle current limiting protects the converter against short circuits at the output. for a continuous short circuit at the output, the max5051? fault integra- tion feature provides hiccup fault protection, thus greatly minimizing excessive temperature rise. current-sense resistor r17 senses the current through the primary of transformer t1 and both primary-side transistors n1 and n2 are turned off when the trip level of 154mv (typ) is reached. the programmable integrating fault protection allows transient overload conditions to be ignored and is configured by resistor r4 and capacitor c7. the planar surface-mount transformer features a bias winding that, along with diode d5, current-limiting resis- tor r18, and reservoir capacitor c21, powers the max5051 once the input voltage is stable. upon initial input voltage application, bootstrap resistor r22 and capacitor c21 enable the max5051 to startup within approximately 70ms. no reset windings are required on the transformer with a clamped two-transistor power topology, simplifying transformer design and maximizing the available copper window in the transformer. when both external primary-side transistors turn off, schottky diodes d2 and d3 recover the magnetic energy stored in the core and feed it back to the input supply. the trans- former provides galvanic isolation up to 500v. on the transformer? secondary side, the max5058 built-in error amplifier, reference voltage source, and feedback resistors r1 and r2 provide voltage feed- back to the primary side through optocoupler u2. resistor r12 sets the reference voltage for the max5058 to 1.657v. margin-up/down capability enables an increase or decrease in the output voltage by 5% and is configurable by replacing resistors r32 and r33. on the primary side, the max5051 receives the voltage-feedback signal from biasing resistor r3 and compensation resistor/capacitor networks r11/c17 and c24 connected to optocoupler u2. pulse transformer t2 provides a galvanically isolated signal to the max5058 secondary-side synchronous rectifier driver circuit from the max5051 pwm primary- side signal. this look-ahead signal avoids large current spikes resulting from a shorted transformer secondary when the freewheeling synchronous rectifier (n4) and primary-side mosfets concurrently conduct. the max5051 controller switches at a 250khz frequency se t by resistor r21 and capacitor c1. the duty cycle is varied to control energy transfer to the output. the maximum duty cycle is 50% for the ev kit? synchro- nously rectified forward converter design and is limited by the max5051. the max5058 ev kit features output-voltage soft-start, thus eliminating any output-voltage overshoots. soft- start allows the output voltage to slowly ramp up in a controlled manner within approximately 3ms. capacitor c5 sets the soft-start time. the brownout uvlo thresh- old voltage is set by resistors r5 and r6. this prevents the power supply from operating below the minimum input supply voltage. multiple max5058 ev kits can be easily paralleled for increased power capabilities when high output current is required. parallel-connected resistors r20 and r36 facilitate current sharing when multiple max5058 ev
evaluates: max5051/max5058 max5058 evaluation kit 6 _______________________________________________________________________________________ kits are connected in parallel. test points tp7 (sfp) and tp8 (sfn) provide access to the max5058 ic? simple 2-wire, differential current-share bus (contact factory for more details). remote-load voltage sensing is provided by interfacing points vs+ and vs-, which use the max5058 built-in remote-sense amplifier. a 22-gauge twisted-pair cable should be used for connecting the remote-load voltage- sensing terminals. this will provide accurate voltage regulation at the load when long leads are used to pro- vide power from the ev kit to the load. if the load is located next to the max5058 ev kit, connect vs- to sgnd and connect vs+ to the vout pin. the output voltage can be margined up or down (increased or decreased) 5% by applying a logic-high signal at the tpmu (mrgu) test point and tpmd (mrgd) test point, respectively. resistors r32 and r33 set the margin up and down at 5%, respectively. a secondary-side thermal overtemperature warning is provided by the max5058 through an open-drain thermal flag signal available at test point tp2. use test point tp3 (sgnd) as a secondary-side ground path for tp2. the 4-layer pc board layout and component placement has been designed to have an industry-standard 1/8th brick pinout. the actual pc board dimensions of the power-supply board are somewhat larger than that of 1/8th brick power supplies (58.42mm x 41.65mm). both outer layers of the pc board are 2oz copper for increased current-carrying capability. evaluating other output voltages, current limits, soft-starts, uvlos, and output- voltage margining up/down v out output voltage the max5058 ev kit? output (vout) is configured to +3.3v by feedback resistors r1, r2, and the max5058 reference voltage set by resistors r12 and r32 (1.657v as configured). to generate output voltages other than +3.3v (from +2.5v to +3.5v, limited by the output capacitor voltage rating), select different voltage- divider resistors (r1, r2) and consult the max5058 data sheet? calculation procedure for output-voltage- setting resistors and margining section. resistor r1 is typically chosen to be less than 25k ? . using the desired output voltage, resistor r2 is then found by the following equation: resistors r1 and r2 preferably should have 0.1% toler- ance. additionally, u2 and resistor r19 limit the mini- mum output voltage (v out ) to +2.5v. the maximum out- put current should be limited to less than 15a. refer to the max5058 data sheet? calculation procedure for output-voltage-setting resistors and margining section for additional information. for improved point-of-load voltage regulation, connect the vs+ and vs- terminals to the load? positive and neg- ative input power terminals, respectively. a 22-gauge twisted-pair wire should be used for this dedicated con- nection. connect the appropriately sized main power cables from the ev kit? vout and sgnd pins. current limiting the max5058 ev kit features cycle-by-cycle current limiting of the transformer primary current. the max5051 controller turns off both external primary-side switching transistors (n1, n2) when the voltage at the cs pin of the max5051 reaches 154mv (typ). current- sense resistor r17 (r17 = 27m ? ) limits the peak prima- ry current to approximately 5.7a (154mv/0.027 ? 5.7a). this limits short-circuit current on the secondary output (vout) to 20a with a 50m ? short at the termi- nals (see figure 7). to evaluate lower current limits, current-sense resistor r17 must be replaced with a dif- ferent value surface-mount resistor (1206 size) as determined by the following equation: where v sense = 0.154v, n s = 2, n p = 8, and i outmax = maximum dc output current (15a or less). note that some fine tuning may be required when selecting the current-limit resistor. there are errors introduced as a result of the presence of the transformer, output inductor ripple current, and propagation delays. soft-start the max5051 controller limits the output voltage rate of rise with a soft-start feature. capacitor c5 sets the ramp time to 91?. to evaluate other soft-start ramp times replace capacitor c5 with another surface-mount capaci- tor (0603 size) as determined by the following equation: where softstart_time is the desired soft-start time in sec- onds. consult the max5051 data sheet for additional information on the soft-start feature. c ax softstart time v 5 64 124 = ( _) . r v nn x xi sense sp outmax 17 12 = (( / ) ( . )) r v vv r where v v as configured iref out iref iref 21 1 675 = ? = . ( ).
evaluates: max5051/max5058 max5058 evaluation kit _______________________________________________________________________________________ 7 undervoltage lockout (uvlo) the max5058 ev kit features a uvlo circuit that prevents operation below the programmed input-supply startup voltage. resistors r5 and r6 set the ev kit? input voltage brownout uvlo. to evaluate other input uvlo voltages, replace resistor r6 with another surface-mount resistor (0805 size). using the desired startup voltage, resistor r6 is then found by the following equation: where vin startup is the desired startup voltage at which the ev kit starts and resistor r5 is typically 38.3k ? . consult the max5051 data sheet for additional information on the uvlo feature. v out margining up and down the max5058 ev kit features a margin-up/down capability to increase or decrease the output voltage by 5%. the percentage of margining is configurable by replacing resistors r32 and r33 on the secondary side. to increase the output voltage, apply a logic-high signal (2.4v up to 4v) at the tpmu (mrgu) test point to increase the output voltage or apply a logic-high signal (2.4v up to 4v) at the tpmd (mrgd) test point to decrease the output voltage. refer to the max5058 data sheet for more information on the voltage-margining feature. r v v xr in startup 6 124 124 5 = ? ( .) . 60 65 75 70 85 90 80 95 046 2810 12 14 output current (a) efficiency (%) r20 = r26 = r36 = 0 ? figure 1. efficiency vs. output current for nominal (48v) input voltage at t a = +25? figure 3. turn-on transient at full load (resistive load) (4ms/div) figure 4. turn-on transient at zero load (4ms/div) figure 2. power dissipation vs. load current for nominal (48v) input voltage at t a = +25? synchronously rectified forward dc-dc converter waveforms 1 0 2 4 3 6 7 5 8 046 2810 12 14 load current (a) power dissipation (w) r20 = r26 = r36 = 0 ? 4ms/div r20 = r26 = r36 = 0 ? r l = 0.22 ? v out 1v/div i load 5a/div v out 1v/div 1ms/div
evaluates: max5051/max5058 max5058 evaluation kit 8 _______________________________________________________________________________________ 1ms/div v out 100mv/div i load 5a/div r20 = r26 = r36 = 0 ? figure 5. output-voltage response to step change in load current (50%-75%-50% of i out(max) : di/dt = 5a/ms) (7.5a- 11.25a-7.5a) 2 s/div v out 50mv/div r20 = r26 = r36 = 0 ? figure 6. output-voltage ripple at the nominal input voltage and rated load current (50mv/div) figure 7. load current (15a/div) as a function of time when the converter attempts to turn on into a 0.050 ? (also acting as the current-sense resistor) short circuit figure 8. mosfet n1 source to primary ground (-vin) waveform i load 10a/div 20ms/div i load 10a/div 1ms/div r20 = r26 = r36 = 0 ? 1 s/div 10v/div
evaluates: max5051/max5058 max5058 evaluation kit _______________________________________________________________________________________ 9 zcp qsync vso 28 15 zcn qrec vsn cso csn csp vp v+ v reg vdr inv l1 2.4 h compv i ref rmgu rmgd mrgd mrgu tsf comps 1 2 26 16 18 19 20 21 22 23 25 14 13 12 11 10 9 8 7 6 max5058 u3 tp2 tp1 vs+ vs- tpmu tpmd tp3 r12 34.8k ? 0.5% c37 220pf r33 604k ? 1% r32 698k ? 1% c28 0.047 f r2 19.1k ? 0.1% r1 19.1k ? 0.1% opto_cat (csp) c39 open r26 0.002 ? r34 220k ? r38 10 ? vout (csn) c30 1 f c16 3.3 f c35 1 f r24 10 ? vreg v+ 4 3 1 6 r28 301 ? 1% lxh d10 d9 d7 lxvdd t2 c26 0.1 f reg9 reg5 r11 360 ? r3 2.2k ? c17 0.33 f c24 1000pf 3 4 2 1 u2 opto_cat c27 0.15 f r19 475 ? vout c22 2200pf 2kv n4 4 2 3 1 6 7 5 8 c32 1 f v+ c23 1000pf d4 c15 270 f 4v c14 270 f 4v c13 270 f 4v c33 1 f 10v sgnd r20 0.004 ? 1% r36 0.004 ? 1% vout vout (csn) (csp) -vin r29 1 ? n5 drvb xfrmrh 3 2 1 d6 n1 +vin c25 0.047 f 100v +vin c12 1 f 100v c11 0.47 f 100v c10 0.47 f 100v d2 d2 xfrmrh 4 5 6 7 8 3 2 1 n3 r10 20 ? 4 1 2 3 7 8 5 6 t1 1 6 4t 2t 10 8 pvin +vin r22 15k ? r18 4.7 ? c21 4.7 f 80v d5 r17 0.027 ? 1% d3 +vin c34 330pf xfrmrh vreg n2 8 3 4 6 7 2 1 5 r13 47 ? 2 5 8t r9 8.2 ? r14 270 ? rcosc syncout rcff con css comp fb reg5 reg9 pvin stt lxh lxl syncin fltint startup uvlo gnd avin bst drvh xfrmrh drvb drvdd pgnd drvl cs ic_paddle 1 2 3 4 5 6 7 8 9 10 11 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 29 max5051 u1 reg5 c1 100pf r21 24.9k ? 1% c2 390pf tp5 c5 4700pf r15 31.6k ? 1% d8 r16 10.5k ? 1% reg5 c4 4.7 f reg9 c3 4.7 f pvin c6 0.1 f c18 1000pf lxh lxl lxvdd 12 reg5 c19 1 f r27 10 ? lxvdd on/off xfrmrh drvb +vin c9 1 f reg9 c20 220pf r8 8.2 ? c8 4.7 f r7 0 ? reg9 d1 +vin r6 1m ? 1% r5 38.3k ? 1% c7 0.22 f r4 1m ? 1% r35 0 ? tp6 vsp v out 17 r37 10 ? sfp sfn tp8 gnd pgnd ic_paddle 5 4 3 27 29 r23 10 ? c36 1 f tp7 c38 0.068 f buf_in 24 r30 2k ? 1% lxl c31 0.1 f c29 1 f rcff r31 220 ? 1% c40 4700pf r40 32.4k ? 1% d11 r39 2k ? r25 47.5k ? 1% rcff figure 9. max5058 ev kit schematic
evaluates: max5051/max5058 max5058 evaluation kit 10 ______________________________________________________________________________________ figure 11. max5058 ev kit pc board layout?omponent side figure 12. max5058 ev kit pc board layout?nner layer, gnd plane figure 13. max5058 ev kit pc board layout?nner layer, v cc plane figure 10. max5058 ev kit component placement guide component side
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 11 2004 maxim integrated products printed usa is a registered trademark of maxim integrated products. evaluates: max5051/max5058 max5058 evaluation kit figure 15. max5058 ev kit component placement guide solder side figure 14. max5058 ev kit pc board layout?older side

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