_______________________________________________________________ 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. max17019n evaluation kit evaluates: max17019 19-5936; rev 0; 6/11 general description the max17019n evaluation kit (ev kit) demonstrates the max17019?s standard application circuit. this quad- output converter steps down high-voltage batteries and/ or ac adapters, generating main supplies for ultra- mobile pcs (umpcs). the ev kit provides a 5v main stage output voltage (vouta), a 1.8v vddq output voltage (voutb), a 1.05v chipset supply output voltage (voutc), and a 0.9v vtt output voltage (voutd) from a 6v to 38v battery input range. it delivers up to 4a output current for the 5v out- put, 2.5a for the 1.8v output, 4a for the 1.05v output, and 2a for the 0.9v output. the 1.8v vddq and 0.9v vtt are for ddr2 memory applications. all outputs are adjust- able by changing feedback resistors r5?r10. the ic also has an internal fixed 5v linear regulator capable of supplying 50ma. the ev kit operates at 0.5mhz (vouta and voutc) and at 1mhz switching frequency (voutb). the ev kit has superior line- and load-transient response. this ev kit is a fully assembled and tested circuit board. it also allows the evaluation of other fixed output voltages by changing r5?r10 resistors. features s 6v to 38v input range s internal 5v linear regulator with 50ma load capability s output voltages vouta: 5v up to 4a (adjustable from 1v to 5.3v) voutb: 1.8v up to 2.5a (adjustable from 0.75v to 4v) voutc: 1.05v up to 4a (adjustable from 0.75v to 4v) voutd: 0.9v up to 2a (adjustable from 0.5v to 2v) s 0.5mhz switching frequency (5v and 1.05v outputs) s 1mhz switching frequency (1.8v output) s independent enable inputs and power-good outputs s overvoltage and undervoltage fault protection s thermal fault protection s proven pcb layout s fully assembled and tested ordering information + denotes lead(pb)-free and rohs compliant. component list part type MAX17019NEVKIT+ ev kit designation qty description c1, c2 2 4.7 f f q 10%, 50v x7r ceramic capacitors (1210) murata grm32er71h475k avx 12105c475kat2a c3 1 22 f f, 50v aluminum electrolytic capacitor (6.3mm x 6.0mm dxl) sanyo 50ce22kx c4, c11, c20, c24 4 4.7 f f q 10% 6.3v x5r ceramic capacitors (0603) murata grm188r60j475k tdk c1608x5r0j475k designation qty description c5, c25, c33 3 1 f f q 10%, 6.3v x5r ceramic capacitors (0402) murata grm155r60j105k tdk c1005x5r0j105k c6 1 1 f f q 10%, 50v x7r ceramic capacitor (0805) murata grm21br71h105k c7, c17, c21, c29 4 0.1 f f q 10%, 10v x5r ceramic capacitors (0402) murata grm155r60j104k tdk c1005x5r1a104k downloaded from: http:///
max17019n evaluation kit evaluates: max17019 2 ______________________________________________________________________________________ component list (continued) designation qty description c9 1 150 f f, 6.3v low-esr capacitor (b case) sanyo 6tpe150mazb nec tokin pslb0j157m(35) c10, c32, c35 0 not installed, capacitors (b case) c14 1 680pf q 10%, 50v x7r ceramic capacitor (0402) murata grm155r71h681k tdk c1005x7r1h681k c15, c36, c37 0 not installed, capacitors (0805) c16, c26, c34 3 10 f f q 20%, 6.3v x5r ceramic capacitors (0805) murata grm21br60j106m tdk c2012x5r0j106m c18, c30 2 1000pf q 10%, 50v x7r ceramic capacitors (0402) murata grm155r71h102k tdk c1005x7r1h102k c19, c22 2 330 f f, 2.5v low-esr capacitors (b case) sanyo 2tpe330mafgb nec tokin pslb20e337m(18) c23 1 2200pf q 10%, 50v x7r ceramic capacitor (0402) murata grm155r71h222k tdk c1005x7r1h222k c27, c28 2 22 f f, 6.3v x5r ceramic capacitors (0805) tdk c2012x5r0j226mt taiyo yuden jmk212bj226mg c31 1 0.22 f f q 10%, 10v x5r ceramic capacitor (0402) murata grm155r60j224k tdk c1005x5r0j224k designation qty description d1 1 250ma, 50v schottky diode (sot323) central semi cmssh-3e l1 1 4.7 f h, 7a, 20m i inductor (7mm x 7mm x 4mm) wrth 744311470 l2, l3 2 1 f h, 6.8a, 14.2m i inductors (5.8mm x 6.2mm x 3.0mm) nec tokin mplc0525l1r0 toko fdv0530-1r0m n1-a, n1-b 1 dual n-channel mosfets (8 so) fairchild fds6982as poka?pokd, refind, sync, vttr 7 test points r1 1 10 i q 5% resistor (0402) r2, r21 2 0 i q 5% resistors (0402) r3, r4, r20, r24, r29 0 not installed, resistors (0402) r5 1 40.2k i q 1% resistor (0402) r6, r8, r10, r22, r23 5 10k i q 1% resistors (0402) r7 1 14k i q 1% resistor (0402) r9 1 4.02k i q 1% resistor (0402) r11?r19 9 100k i q 5% resistors (0402) r25 1 51 i q 5% resistor (0402) r26 1 0.004 i q 1%, 1/4w resistor (1206) vishay (dale) wsl12064l000fea r27, r28 0 not installed, resistors?short (pc trace) (0612) sw1 1 5-position, low-profile dip switch itt sd05h0sb or equivalent u1 1 quad output controller (48 tqfn-ep) maxim max17019atm+ ? 1 pcb: max17019n evaluation kit+ downloaded from: http:///
max17019n evaluation kit evaluates: max17019 _______________________________________________________________________________________ 3 quick start required equipment ? max17019n ev kit ? 6v to 38v, 100w dc power supply ? four dummy loads capable of sinking 4a each ? four digital multimeters ? 100mhz dual-trace oscilloscope procedure the ev kit is a fully assembled and tested surface-mount board. follow the steps below to verify board operation. caution: do not turn on the power supply until all connections are completed. 1) ensure that the circuit is connected correctly to the power supply and dummy loads prior to applying any power. 2) set sw1 (1, 10) to the on position ( shdn = vbatt, ic enabled). set sw1 (2, 9) to the on position (ona = vdd, vouta enabled). set sw1 (3, 8) to the on position (onb = vdd, voutb enabled). set sw1 (4, 7) to the on position (onc = vdd, voutc enabled). set sw1 (5, 6) to the on position (ond = vdd, voutd enabled). 3) connect the first dmm across the vouta and gnd pcb pads. connect the second dmm across the voutb and gnd pcb pads. connect the third dmm across the voutc and gnd pcb pads. connect the fourth dmm across the voutd and gnd pcb pads. 4) turn on the power supply and adjust the input volt- age to 12v. 5) verify that the output voltages are vouta = 5v, voutb = 1.8v, voutc = 1.05v, and voutd = 0.9v. detailed description of hardware 5v output-voltage setting (vouta) the max17019n ev kit is shipped with fba connected to resistors r5 and r6, which sets the vouta voltage to 5v. to change the output voltage to a value between 1v and 5.3v, remove r5. calculate r5 using the following equation: r5 = r6 [(vouta/vfba) - 1] where vfba = 1v and r6 =10k i q 1%. for an output voltage of 1v, place a short across r5 and leave r6 open. note: indicate that you are using the max17019 when contacting these component suppliers. component suppliers supplier phone website avx corporation 843-946-0238 www.avx.com central semiconductor corp. 631-435-1110 www.centralsemi.com fairchild semiconductor 888-522-5372 www.fairchildsemi.com murata manufacturing co., ltd. 770-436-1300 www.murata.com nec tokin america, inc. 408-324-1790 www.nec-tokinamerica.com sanyo electric company, ltd. 619-661-6835 www.sanyodevice.com taiyo yuden 800-348-2496 www.t-yuden.com tdk corp. 847-803-6100 www.component.tdk.com toko america, inc. 847-297-0070 www.tokoam.com vishay 402-564-3131 www.vishay.com wrth electronik gmbh & co. kg 201-785-8800 www.we-online.com downloaded from: http:///
max17019n evaluation kit evaluates: max17019 4 ______________________________________________________________________________________ 1.8v output-voltage setting (voutb) the ev kit is shipped with fbb connected to resistors r7 and r8, which sets the voutb voltage to 1.8v. to change the output voltage to a value between 0.75v and 4v, remove r7. calculate r7 using the following equation: r7 = r8 [(voutb/vfbb) - 1] where vfbb = 0.75v and r8 =10k i q 1%. for an output voltage of 0.75v, place a short across r7 and leave r8 open. 1.05v output-voltage setting (voutc) the ev kit is shipped with fbc connected to resistors r9 and r10, which sets the voutc voltage to 1.05v. to change the output voltage to a value between 0.75v and 4v, remove r9. calculate r9 using the following equation: r9 = r10 [(voutc/vfbc) - 1] where vfbc = 0.75v and r10 =10k i q 1%. for an output voltage of 0.75v, place a short across r9 and leave r10 open. 0.9v output-voltage setting (voutd) the ev kit is shipped with fbd connected directly to output voltage voutd. the voltage at fbd tracks the refind voltage. the refind voltage is set to 0.9v (half the output voltage at voutb) by resistor-divider r22 and r23. to change the voutd output voltage to a value between 0.5v and 2v, remove r22. calculate r22 using the fol- lowing equation: r22 = r23 [(voutb/voutd) - 1] where r23 =10k i q 1%. frequency selection (freq) the switching frequency of the ev kit can be adjusted by removing resistor r24 and installing a short across resistors r20 or r21. as configured, the ev kit operates at 0.5mhz (vouta and voutc) and at 1mhz switch- ing frequency (voutb). when changing the switching frequency, refer to the max17019 ic data sheet for the proper component selections and calculations for the inductors and output capacitors. table 1. switch sw1 settings table 2. switching-frequency selection note: as configured, the max17019n ev kit is shipped with all sw1 settings in the off position. * default position. sw1 pin control ic output sw1-a off shdn pin is connected to gnd shutdown mode (all outputs disabled) on shdn pin is connected to vbatt ic enabled (all outputs depend on sw1 position settings) sw1-b off ona pin is connected to gnd disables vouta, vouta = 0v on ona pin is connected to vdd enables vouta, vouta = 5v sw1-c off onb pin is connected to gnd disables voutb, voutb = 0v on onb pin is connected to vdd enables voutb, voutb = 1.8v sw1 - d off onc pin is connected to gnd disables voutc, voutc = 0v on onc pin is connected to vdd enables voutc, voutc = 1.05v sw1-e off ond pin is connected to gnd disables voutd, voutd = 0v on ond pin is connected to vdd enables voutd, voutd = 0.9v freq pin switching frequency vouta voutb voutc connected to vdd through open resistor r24 250khz 500khz 250khz connected to ref through open resistor r20 375khz 750khz 375khz connected to gnd through 0 i resistor r21* 500khz 1mhz 500khz downloaded from: http:///
max17019n evaluation kit evaluates: max17019 _______________________________________________________________________________________ 5 figure 1. max17019n ev kit schematic downloaded from: http:///
max17019n evaluation kit evaluates: max17019 6 ______________________________________________________________________________________ figure 4. max17019n ev kit pcb layout?layer 2 figure 5. max17019n ev kit pcb layout?layer 3 figure 3. max17019n ev kit pcb layout?component side figure 2. max17019n ev kit component placement guide? component side 1.0? 1.0? 1.0? 1.0? downloaded from: http:///
max17019n evaluation kit evaluates: max17019 _______________________________________________________________________________________ 7 figure 6. max17019n ev kit pcb layout?solder side figure 7. max17019n ev kit component placement guide? solder side 1.0? 1.0? 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. 8 maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. max17019n evaluation kit evaluates: max17019 revision history revision number revision date description pages changed 0 6/11 initial release ? downloaded from: http:///
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