for more information, please visit the product page. ????????? ?????????????????? cui .com 05/18/2017 1 of 8 series : vx78-500 description: non-isolated dc switching regulator features ? wide input ? pin-out compatible with linear regulators ? encapsulated ? ul & csa approved ? high efficiency up to 95% ? no-load input current as low as 0.2 ma ? wide operating temp: -40c to +85c ? supports negative output ? short circuit protection on the output model input voltage 1 output voltage output current output power ripple & noise 2 effciency 3 typ (vdc) range (vdc) (vdc) max (ma) max (w) max (mvp-p) typ (%) VX7803-500 24 4.75~36 3.3 500 1.65 75 86 vx7805-500 24 12 6.5~36 7~31 5 -5 500 -300 2.5 1.5 75 75 90 80 vx78039-500 24 12~36 9 500 4.5 75 93 vx78012-500 24 12 15~36 8~24 12 -12 500 -150 6 1.8 75 75 94 84 vx7815-500 24 12 19~36 8~21 15 -15 500 -150 7.5 2.25 75 75 95 85 notes: 1. for input voltages higher than 30 vdc, a 22 f / 50 v input capacitor is required. 2. tested at nominal input, 10~100% load, 20 mhz bandwidth, with 10 f electrolytic and 1 f ceramic capacitor on the output. at loads below 10%, the max ripple and noise of the 3.3 & 5 vdc outputs will be 150 mvp-p, and the other outputs will be 2% vo. 3. measured at min vin, full load. 4. all specifcations are measured at ta=25c, humidity < 75%, nominal input voltage, and rated output load unless otherwise specifed. part number key base number vx78 xx - 500 output voltage output current date page
for more information, please visit the product page. ?????????????????? cui .com date 05/18/2017 page 2 of 8 cui inc series : vx78-500 description: non-isolated dc switching regulator input parameter conditions/description min typ max units operating input voltage 1 for positive output applications for negative output applications 4.75 7 24 12 36 31 vdc vdc flter capacitor flter input reverse polartiy protection no no-load input current positive outputs 0.2 1.5 ma note: 1. see model section on page 1 for specifc input voltage ranges. output parameter conditions/description min typ max units maximum capacitive load 2 for positive output applications for negative output applications 680 330 f f voltage accuracy at full load, input voltage range 3.3 vdc output model all other models 2 2 4 3 % % line regulation at full load, input voltage range 0.2 0.4 % load regulation at nominal input, 10~100% load 0.4 0.6 % switching frequency at nominal input voltage, full load 550 850 khz transient recovery time at nominal input voltage, 25% load step change 0.2 1 ms transient response deviation at nominal input voltage, 25% load step change 50 250 mv temperature coeffcient at full load 0.03 %/c note: 2. the maximum capacitive load was tested at nominal input voltage, full load. protections parameter conditions/description min typ max units short circuit protection continuous, auto recovery safety and compliance parameter conditions/description min typ max units safety approvals ul 60950-1 emi/emc en 55032, en 55024 conducted emissions cispr22/en55022, class b (external circuit required, see figure 6-b) radiated emissions cispr22/en55022, class b (external circuit required, see figure 6-b) esd iec/en61000-4-2, contact 4kv, class b radiated immunity iec/en61000-4-3, 10v/m, class a eft/burst iec/en61000-4-4, 1kv, class b (external circuit required, see figure 6-a) surge iec/en61000-4-5, line-line 1kv, class b (external circuit required, see figure 6-a) conducted immunity iec/en61000-4-6, 3 vr.m.s, class a mtbf as per mil-hdbk-217f, 25c 2,000,000 hours rohs 2011/65/eu
for more information, please visit the product page. ?????????????????? cui .com date 05/18/2017 page 3 of 8 cui inc series : vx78-500 description: non-isolated dc switching regulator 10 sec. max. wa ve soldering time 4 sec. max. pe ak t emp. 260c max. time (sec.) t emper ature (c) 250 200 150 100 50 0 environmental parameter conditions/description min typ max units operating temperature see derating curve -40 85 c storage temperature -55 125 c storage humidity non-condensing 5 95 % solderability parameter conditions/description min typ max units wave soldering see wave soldering profle 260 c mechanical parameter conditions/description min typ max units dimensions 11.60 x 7.55 x 10.16 [0.457 x 0.297 x 0.400 inch] mm case material black fame-retardant heat-proof plastic (ul94v-0) weight 1.8 g mechanical drawing units: mm [inch] tolerance: 0.25[0.010] pin diameter tolerance: 0.10[0.004] pin connections pin +output -output 1 +vin +vin 2 gnd -vout 3 +vout gnd
for more information, please visit the product page. ?????????????????? cui .com date 05/18/2017 page 4 of 8 cui inc series : vx78-500 description: non-isolated dc switching regulator derating curve ambient t emper ature (c) load (% ) -40 60 80 100 40 20 04 08 5 te mperature derating curve (natural convention) 120 120 71 0 efficiency curves 4.75 8 12 16 20 24 28 32 36 88 86 84 82 efficiency (% ) 80 78 input v oltage (vdc) 76 load current (%) 10 20 30 40 50 60 70 80 90 100 82 80 78 76 74 efficiency (% ) 72 70 84 VX7803-500 effciency curve positive output, effciency vs. input voltage (at full load) VX7803-500 effciency curve positive output, effciency vs. load current (at vin nominal) 15 18 21 24 27 30 33 36 96 94 92 90 88 efficiency (% ) 86 84 input v oltage (vdc) 82 80 load current (%) 10 20 30 40 50 60 70 80 90 100 96 94 92 88 86 efficiency (% ) 84 82 98 90 vx78012-500 effciency curve positive output, effciency vs. input voltage (at full load) vx78012-500 effciency curve positive output, effciency vs. load current (at vin nominal)
for more information, please visit the product page. ?????????????????? cui .com date 05/18/2017 page 5 of 8 cui inc series : vx78-500 description: non-isolated dc switching regulator efficiency curves ( continued ) 8 12 16 20 24 88 86 84 82 efficiency (% ) 80 78 input v oltage (vdc) 76 74 load current (% ) 10 20 30 40 50 60 70 80 90 100 82 80 78 76 74 efficiency (% ) 72 70 84 86 88 vx78012-500 effciency curve negative output, effciency vs. input voltage (at full load) vx78012-500 effciency curve negative output , effciency vs. load current (at vin nominal) 19 20 22 24 26 28 30 32 34 36 98 96 94 92 efficiency (% ) 90 88 input v oltage (vdc) 86 84 load current (% ) 10 20 30 40 50 60 70 80 90 100 96 94 92 88 86 efficiency (% ) 84 82 90 vx7815-500 effciency curve positive output, effciency vs. input voltage (at full load) vx7815-500 effciency curve positive output, effciency vs. load current (at vin nominal) 8 12 15 18 21 90 88 86 efficiency (% ) 84 82 input v oltage (vdc) 80 78 load current (%) 10 20 30 40 50 60 70 80 90 100 86 84 82 80 78 efficiency (% ) 76 74 88 90 vx7815-500 effciency curve negative output, effciency vs. input voltage (at full load) vx7815-500 effciency curve negative output, effciency vs. load current (at vin nominal)
for more information, please visit the product page. ?????????????????? cui .com date 05/18/2017 page 6 of 8 cui inc series : vx78-500 description: non-isolated dc switching regulator table 1 1 3 2 +v in gn d -v ou t c2 gn d dc /d c 1 2 3 +v ou t c1 c3 c4 ld m dc /d c model number c1, c3 (ceramic capacitor) c2, c4 (ceramic capacitor) VX7803-500 10 f/50 v 22 f/10 v vx7805-500 10 f/50 v 22 f/10 v vx78039-500 10 f/50 v 22 f/16 v vx78012-500 10 f/50 v 22 f/25 v vx7815-500 10 f/50 v 22 f/25 v external capacitor table typical application circuit positive output application circuit negative output application circuit positive and negative output paralleling application circuit +v in gn d gn d dc /d c 1 2 3 +v ou t c1 c2 +v in gn d gn d dc /d c 1 2 3 -v ou t c1 c2 figure 1 figure 3 figure 2 emc recommended circuit dc /d c vi n ld m2 e c0 ld m1 mo v fu se d c5 v in gn d + +v o gn d lo ad c2 c1 table 2 figure 6 recommended external circuit components fuse choose according to actual input current mov s20k30 ldm1 82 h c0 680 f/50 v c1, c2 see table 1 c5 4.7 f/50 v ldm2 12 h note: 1. c1 & c2 (c3 & c4) are required and should be connected as close to the module pins as possible. 2. to reduce the output ripple further, it is recommended to connect an lc flter at the output terminal with a recommended value of 10~47 h for the l component. (see figures 4 & 5). 3. when using application circuit in figure 3, a 10 h ldm component is recommended to reduce the interference. positive output ripple reduction circuit negative output ripple reduction circuit 3 +v in gn d vo ut 1 dc /d c c1 22 f 2 c2 l 2 +v in gn d vo ut 1 dc /d c c1 22 f 3 c2 l figure 4 figure 5
for more information, please visit the product page. ?????????????????? cui .com date 05/18/2017 page 7 of 8 cui inc series : vx78-500 description: non-isolated dc switching regulator packaging units: mm tube size: 9.6 x 16.9 x 530 mm qty: 43 pcs
for more information, please visit the product page. ????????? date 05/18/2017 page 8 of 8 cui inc series : vx78-500 description: non-isolated dc switching regulator cui offers a two (2) year limited warranty. complete warranty information is listed on our website. cui reserves the right to make changes to the product at any time without notice. information provided by cui is believed to be accurate and reliable. however, no responsibility is assumed by cui for its use, nor for any infringements of patents or other rights of third parties which may result from its use. cui products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safet y or effectiveness. headquarters 20050 sw 112th ave. tualatin, or 97062 800.275.4899 fax 503.612.2383 cui .com techsupport@cui.com rev. description date 1.0 initial release 05/18/2017 the revision history provided is for informational purposes only and is believed to be accurate. revision history
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