_______________________________________________________________ maxim integrated products 1 for pricing, delivery, and ordering information, pl ease contact maxim direct at 1-888-629-4642, or visit maxim?s website at www.maxim-ic.com. max15034b evaluation kit evaluates: max15034b/max5066 19-4885; rev 0; 8/09 general description the max15034b evaluation kit (ev kit) is a two-phase, dual-output buck converter with a 5v to 16v input volt- age range. the max15034b ev kit provides dual 1.2v output voltages (v out1 and v out2 ). it delivers up to 20a output current for each output with 86.7% efficiency. the max15034b ev kit uses average current-mode control and operates at 300khz switching frequency per phase where each phase is 180 n out-of-phase with respect to the other. the max15034b ev kit is a fully assembled and tested circuit board. both outputs are adjustable between 0.61v and 5.5v by changing feedback resistors r4? r7. additional features include thermal-shutdown and ?hiccup-mode? short-circuit protection. features s 5v to 16v input-voltage range (design optimized for 12v input) s output voltages 1.2v at 20a (adjustable from 0.61v to 5.5v) 1.2v at 20a (adjustable from 0.61v to 5.5v) s 300khz switching frequency s both outputs can be paralleled for higher current capability (using mode function) s average current-mode control provides accurate current limit s current-sharing accuracy within q 5% between parallel channels s 180 interleaved operation reduces size of input filter capacitors s overtemperature shutdown s excellent line- and load-transient response s hiccup-mode overcurrent protection s can be synchronized to an external clock s provision for output dc accuracy s low-profile components s fully assembled and tested ordering information + denotes lead(pb)-free and rohs compliant. component list part type MAX15034BEVKIT+ ev kit designation qty description agnd (x2), clkin, vreg 4 20g tinned copper bus wire formed into u-shaped loops (0.25in off the pcb) c1 1 470 f f, 35v electrolytic capacitor sanyo 35ce470kx panasonic eevfk1v471q c2, c25, c26, c27 4 22 f f q 10%, 25v x5r ceramic capacitors (1210) murata grm32er61e226k c3 1 4.7 f f q 10%, 10v x5r ceramic capacitor (0805) murata grm21br61a475k tdk c2012x5r1a475k c4, c5, c24 3 0.1 f f q 10%, 25v x7r ceramic capacitors (0603) murata grm188r71e104k tdk c1608x7r1e104k downloaded from: http:///
max15034b evaluation kit evaluates: max15034b/max5066 2 ______________________________________________________________________________________ component list (continued) designation qty description c6, c7 2 0.47 f f q 10%, 25v x5r ceramic capacitors (0603) murata grm188r61e474k tdk c1068x5r1e474k c8, c13, c14 3 1 f f q 10%, 16v x5r ceramic capacitors (0603) murata grm188r61c105k tdk c1608x7r1c105k c9, c20 2 560 f f, 4v, 9m i electrolytic capaci- tors (e12) sanyo 4svpc560mx nichicon pcj0g561mcl9gs c10, c11, c21, c22 4 100 f f q 20%, 6.3v x5r ceramic capacitors (1206) murata grm31cr60j107me39l c16, c18 2 470pf q 10%, 50v x7r ceramic capacitors (0603) murata grm188r71h471k c17, c19 2 0.033 f f q 10%, 25v x7r ceramic capacitors (0603) murata grm188r71e333k c28, c30 0 not installed, ceramic capacitors (0603) c29, c31 2 1200pf q 5%, 50v c0g ceramic capacitors (0603) murata grm1885c1h122j tdk c1608c0g1h122j c32, c35 2 1 f f q 10%,16v x5r ceramic capac- itors (0603) murata grm188r61c105k c33, c36 0 not installed, ceramic capacitors (0603) c34, c37 2 100pf q 5%, 50v c0g ceramic capacitors (0402) murata grm1555c1h101j tdk c1005c0g1h101j designation qty description c38, c39 0 not installed, ceramic capacitors (0805) c40, c43 2 10 f f q 20%, 6.3v x5r ceramic capacitors (0603) murata grm188r60j106m c41, c42 2 1 f f q 10%, 6.3v x5r ceramic capacitors (0603) murata grm188r60j105k c44, c45 0 not installed, ceramic capacitors (0603) d1, d2 2 100ma, 30v schottky diodes (sot23) central semi cmpsh-3 (top mark: d95) ju1, ju2, ju3 3 3-pin headers, 0.1in centers sullins pec36saan l1, l2 2 0.56 f h, 1m i , 30a power inductors cooper bussmann (coiltronics) hcf1305-r56-r n1, n2 2 20v, 20a, 11.5m i n-channel mosfets (powerpak 8 so) vishay siliconix sir484dp n3, n4 2 20v, 50a, 4m i n-channel mosfets (powerpak 8 so) vishay siliconix sir890dp pgnd (x3), vin, vout1, vout2 6 binding posts johnson 111-2223-001 r1, r2 0 not installed, sense resistors?short (pc trace) (2512) r3 1 1 i q 5% resistor (1206) r4, r6 2 2.05k i q 1% resistors (0603) r5, r7 2 2k i q 1% resistors (0603) r8, r9 2 10k i q 1% resistors (0603) downloaded from: http:///
max15034b evaluation kit evaluates: max15034b/max5066 _______________________________________________________________________________________ 3 note: indicate that you are using the max15034b when contacting these component suppliers. * ep = exposed pad. component suppliers component list (continued) supplier phone website central semiconductor corp. 631-435-1110 www.centralsemi.com cooper bussmann 916-941-1117 www.cooperet.com murata electronics north america, inc. 770-436-1300 www.murata-northamerica.com nichicon usa 858-824-1515 www.nichicon-us.com panasonic corp. 800-344-2112 www.panasonic.com sanyo electric co., ltd. 619-661-6835 www.sanyodevice.com tdk corp. 847-803-6100 www.component.tdk.com vishay 402-563-6866 www.vishay.com designation qty description r10, r11 2 4.7 i resistors (0603) r12 1 41.2k i q 1% resistor (0603) r13, r14 2 5.1k i q 5% resistors (0603) r15, r16 2 1k i q 1% resistors (0603) r17, r19 0 not installed, resistors (1206) r18, r20 2 2.2 i q 5% resistors (1206) r21 1 33.2k i q 1% resistor (0603) r22 1 10k i q 1% resistor (0603) r23?r26 4 806 i q 1% resistors (0603) r27, r28 2 49.9 i q 1% resistors (0402) r29, r30 0 not installed, resistors (0603) designation qty description u1 1 single-/dual-output synchronous buck controller (28 tssop-ep*) maxim max15034baui+ tp1?tp8, tp1a? tp4a 12 miniature test points keystone 5000 ? 3 shunts (see tables 1, 2, 3) sullins stc02syan ? 1 pcb: max15034b evaluation kit+ downloaded from: http:///
max15034b evaluation kit evaluates: max15034b/max5066 4 ______________________________________________________________________________________ table 3. jumper ju3 functions (mode function) * default position. quick start recommended equipment ? 5v to 16v power supply ? digital multimeters (dmms) ? 100mhz dual-trace oscilloscope procedure the max15034b ev kit is fully assembled and test- ed. follow the steps below to verify board operation. caution: do not turn on the power supply until all connections are completed. 1) verify that the shunts are across: ju1 pins 1-2 (out1 enabled) ju2 pins 1-2 (out2 enabled) ju3 pins 2-3 (dual-output, out-of-phase operation) 2) turn on the power supply and adjust the input volt- age to 12v. 3) verify that the output voltages are v out1 = 1.2v and v out2 = 1.2v. detailed description of hardware jumper settings dual-output/dual-phase select (mode function) the max15034b can operate as a dual-output, inde- pendently regulated buck converter, or as a dual-phase, single-output buck converter. the mode input selects between the two operating modes. when mode is grounded (logic-low), the max15034b operates as a dual-output dc-dc converter. when mode is con- nected to reg (logic-high), the max15034b works as a dual-phase, single-output buck regulator with each phase 180 n out-of-phase with respect to each other. operating the max15034b as a single-output, dual- phase dc-dc controller requires changes to the ev kit. each dc-dc controller should have identical external components and the output of both dc-dc controllers should be connected to form a single output. refer to the max15034 ic data sheet for selecting the appropri- ate components. evaluating other output voltages the max15034b provides programmed, dual 1.2v out- puts (v out1 and v out2 ). both outputs can also be adjusted from 0.61v to 5.5v by using resistive voltage- dividers formed by r4/r5 and r6/r7. the adjusted output voltages are: v out1 = 0.61v (1 + r4/r5) v out2 = 0.61v (1 + r6/r7) note: refer to the max15034 ic data sheet for selection of output capacitors, inductor, and network compensa- tion values for different output voltages. rt/clkin input the max15034b ev kit is configured for a clock frequen- cy of 300khz. the ev kit can be evaluated at different clock frequencies by adjusting r12 or directly applying a clock signal (200khz to 2mhz) to the clkin pad. refer to the max15034 ic data sheet for proper selection of the clock-setting resistor, r12. table 1. jumper ju1 functions (output 1 enable control) table 2. jumper ju2 functions (output 2 enable control) * default position. * default position. shunt position mode pin out1 1-2 connected to vreg max15034b operates as a single-output, dual- phase buck regulator 2-3* connected to gnd max15034b operates as a dual-output, out-of- phase buck regulator shunt position en1 pin out1 1-2* connected to vreg out1 is enabled, v out1 = 1.2v 2-3 connected to gnd out1 is disabled, v out1 = 0v shunt position en2 pin out1 1-2* connected to vreg out2 is enabled, v out2 = 1.2v 2-3 connected to gnd out2 is disabled, v out2 = 0v downloaded from: http:///
max15034b evaluation kit evaluates: max15034b/max5066 _______________________________________________________________________________________ 5 high dc output accuracy max15034 ev kit can be configured for either adaptive voltage positioning or for high dc output accuracy. for adaptive voltage positioning at the output, keep c44, c45, r29, and r30 open, and use resistors r8, r9, as suggested in the component list . for high dc output accuracy at the output, see table 4 for the necessary modifications (use capacitors at r8, r9). with the above modifications for high dc output accu- racy, the observed crossover frequency is 30.2khz and phase margin is 54.5 n . sense resistor as configured, the max15034b ev kit utilizes lossless inductor sensing to limit the maximum inductor current. the ev kit can also be evaluated with a current-sense resistor. to evaluate resistive sensing, reconfigure the ev kit as listed in table 5. once the ev kit is reconfigured, make the following con- nections: 1) connect tp1 to tp1a 2) connect tp2 to tp2a 3) connect tp3 to tp3a 4) connect tp4 to tp4a alternate components as configured, the max15034b ev kit is fully functional and operational. however, the ev kit can be recon- figured with alternate components. table 6 provides alternate mosfets (n1?n4) and inductors (l1, l2) for evaluation of the max15034b ev kit. evaluating the max5066 the max15034b ev kit can also be used to evaluate the max5066. to evaluate the ev kit with a max5066, order a max5066eui+ with the max15034b ev kit. additional ev kit modifications are needed, as listed in table 7. table 4. suggested components for high dc output accuracy table 5. sense resistor configuration table 7. max5066 evaluation configuration table 6. alternate components list * default position. * refer to the current limit section in the max15034 ic data sheet. designation qty description c44, c45 2 4700pf q 10%, 50v x7r ceramic capacitors (0603) murata grm188r71h472ka01d r8, r9 2 100pf q 10%, 50v c0g ceramic capacitors (0603) murata grm188r71h472ka01d r29, r30 2 12.1k i q 1% resistors (0603) component description v out1 v out2 c32, c33, c34 c35, c36, c37 not installed r1 r2 install current-sense resistor* r23, r24 r25, r26 not installed, resistors tp3, tp3a, tp4, tp4a tp1, tp1a, tp2, tp2a miniature test points designation description r21, r22 not installed, resistors c15 (installed in the r22 location) 0.22 f f q 20%, 10v x7r ceramic capacitor (0603) designation description n1, n2 (high side) fairchild semiconductor fdd8780 fairchild semiconductor fdd8782 infineon ipd075n03lg on semiconductor ntd60n20r international rectifier irlr7821 n3, n4 (low side) infineon ipd031n03mg international rectifier irlr8743 fairchild semiconductor fdd8870 l1, l2 (3 lead) sumida cep125np-0r6n-d nec tokin c-pi-1250-0r6s reisetech l510-r68mf reisetech l816-r68mf l1, l2 (2 lead) panasonic etqp5lr50xfa vishay (dale) ihlp-5050ez-er-1r0-m-01 downloaded from: http:///
max15034b evaluation kit evaluates: max15034b/max5066 6 ______________________________________________________________________________________ figure 1. max15034b ev kit schematic in 22 1d1 3 2016 17 18 19 13 14 vdd reg bst2 dh2 lx2 dl2 2127 26 25 24 pgnd csp2 csn2 ean2 eaout2 mode 232 1 4 3 9 bst1dh1 lx1 dl1 csp1 csn1 ean1 eaout1 en1 en2 rt/clkin avglimit 6 ep ep c26 22f 25v c25 22f 25v c34 100pf c131f 12 3 ju1 c44open r29 open r8 10k i 1% tp4a c6 0.47f c28open r17open l1 tp3 tp4 0.56h r1 short (pc trace) c33open r24 806 i 1% c32 1f r23 806 i 1% r18 2.2 i c8 1f 16v r3 1 i vreg pgnd agnd pgnd pgnd n1 9 8 7 6 5 pgnd pgnd tp3a c5 0.1f pgnd pgnd pgnd pgnd vin vin c1 470f 35v c24 0.1f 25v c3 4.7f 10v pgnd c9 560f 4v pgnd pgnd clkin agnd vout1 vout1 vout1 vreg pgnd pgnd pgnd 3 2 1 4 4 1d2 3 vin r10 4.7 i r11 4.7 i r12 41.2k i 1% n3 9 8 7 6 5 3 2 1 1 2 3 4 4 c30open r19 open r202.2 i c37100pf c311200pf c36 open r26806 i 1% r28 49.9 i 1% r6 2.05k i 1% r7 2k i agnd vin c2 22f 25v c27 22f 25v pgnd n2 pgnd 5 6 7 8 9 c29 1200pf pgnd r22 10k i 1% r21 33.2k i 1% pgnd c10 100f 6.3v pgnd c11 100f 6.3v pgnd c40 10f c41 1f r2749.9 i 1%r4 2.05k i 1% c38 open agnd agnd r52k i tp5 tp6 pgnd 1112 l2 0.56h r2 short (pc trace) pgnd tp1atp2a r25 c35 806 i 1% 1f c20 560f 4v c70.47f c39open tp8 pgnd tp7 1 2 3 n4 5 6 7 8 9 15 r13 5.1k i c141f 12 3 ju2 12 3 ju3 vreg agnd agnd r9 10k i 1% r30 open r16 1k i 1% c45 open agndagnd vreg vreg vreg vdd vin agnd agnd agnd agnd 8 agnd agnd 28 7 r14 5.1k i agnd c4 0.1f tp1 c21 100f 6.3v pgnd c22 100f 6.3v pgnd c42 1f vout2 pgnd c43 10f pgnd tp2 clp1 10 c18 470pf c19 0.033 f r15 1k i 1% clp2 us2 5 c16 470pf c17 0.033 f max15034b u1 vout2 vout2 pgnd pgnd pgnd downloaded from: http:///
max15034b evaluation kit evaluates: max15034b/max5066 _______________________________________________________________________________________ 7 figure 3. max15034b ev kit pcb layout?component side figure 2. max15034b ev kit component placement guide?component side downloaded from: http:///
max15034b evaluation kit evaluates: max15034b/max5066 8 ______________________________________________________________________________________ figure 5. max15034b ev kit pcb layout?internal layer 3?agnd layer figure 4. max15034b ev kit pcb layout?internal layer 2?pgnd plane downloaded from: http:///
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit 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 9 ? 2009 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. max15034b evaluation kit evaluates: max15034b/max5066 figure 7. max15034b ev kit component placement guide?solder side figure 6. max15034b ev kit pcb layout?solder side downloaded from: http:///
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