the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. k78xxt-500 b/0-2012 page 1 of 5 k78xxt-500 series wide input, non-isolated & regulated smd package single output rohs product program input voltage (vdc) output voltage (vdc) efficiency (%)(typ.) part number nominal range normal adjust range current (ma) vin (min.) vin (max.) k7803t-500 12 4.5-28 3.3 1.8-5.5 500 90 75 k7805t-500 12 6.0-28 5.0 2.5-8.0 500 94 81 K7809T-500 24 11-28 9.0 3.0-11.5 500 95 87 k7812t-500 24 14-28 12 4.5-13.5 500 95 90 k7815t-500 24 17-28 15 4.5-15.5 500 96 92 note: 1. answer for vin-vo>2v if needed to adjust the output voltage; 2. if input voltage above specified may cause permanent damage to the device. 3. k7812t-500, k7815t-500 is not allowed to operate under no load. specifications characteristics conditions min. typ. max. units input voltage range see selection guide 4.5 12/24 28 v output voltage adjust range see selection guide 1.8 15.5 v output voltage accuracy input voltage range at full load 2 3 line regulation input voltage range at full load 0.2 0.5 load regulation nominal input ,10% to 100% load 0.3 0.75 % ripple and noise 20mhz bandwidth 10 25 mvp-p short circuit protection mode hiccup mode short circuit protection continuous, automatic recovery output current limit 1.8 a dynamic load stability 100%<->10% load 30 75 mv quiescent current normal input (3.3v, 5v output) 15 ma thermal shutdown internal ic junction 160 c temperature coefficient -4 0 c to +85 c ambient 0.02 %/ c max capacitance load 1000 f on/off control current on: open or 1.5220 c) sec 220 c 10 max sec peak.temp 240 c remark: the curve applies only to the hot air reflow soldering mornsun science & technology co.,ltd. address: no. 5, kehui st. 1, kehui development center, science ave., guangzhou science city, luogang district, guangzhou,p.r.china. tel: 86-20-38601850 fax:86-20-38601272 http://www.mornsun-power.com
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. k78xxt-500 b/0-2012 page 2 of 5 typical temperature curve external capacitor table operating temp.( ) c temperature derating graph part number c1 (ceramic capacitor) c2 (ceramic capacitor) k7803t-500 10uf/50v 22uf/16v k7805t-500 10uf/50v 22uf/16v K7809T-500 10uf/50v 22uf/16v k7812t-500 10uf/50v 10uf/25v k7815t-500 10uf/50v 10uf/25v standard application circuit k7805t-500 1 7,9 5 vin gnd vout c2 c1 6 10 on/off r1 r2 gnd 470pf c3 100f c5 1. c1,c2: choose a ceramic type capacitors; c3 is require ,for best performance , use a 100 f or more capacitor please. 2. c1,c2 are require and should be placed close to the pins of the converter, with shortest possible traces. 3. no parallel connection or plug and play. adjustment resistor values model k7803t-500 k7805t-500 K7809T-500 k7812t-500 k7815t-500 vo (nominal) 3.3v 5.0v 9v 12v 15v adjusted range 1.8v-5.5v 2.5v-8v 3v-11.5v 4.5v-13.5v 4.5v-15.5v regulated voltage r1(k ) r2(k ) r1(k ) r2(k ) r1(k ) r2(k ) r1(k ) r2(k ) r1(k ) r2(k ) 1.8v 24.31 2.5v 98.9 25.28 3.0v 364 47.6 3.1 3.3v 67.3 5.79 3.6v 129.1 95.8 8.47 3.9v 59.1 140.9 11.8 4.5v 24.3 411 19.14 4.55 2.69 4.9v 15.25 2060 25.77 8.05 5.55 5.0v 14.05 27.3 9.16 6.17 5.1v 12.8 208.5 29.22 10.41 6.98 5.5v 8.65 58.5 37.8 15 10 6.5v 15.57 70.8 29.8 18.5 7.2v 7.8 115.3 43.5 26.2 8.0v 3.15 243.1 64.8 36.7 9.0v 105 52.9 10.0v 18.84 180.6 76.3 11.0v 4.47 370 111 11.5v 1.61 635 134.1 12.0v 167.7 13.0v 40.6 277.8 13.5v 15 385 14.0v 586 14.5v 1128 15.0v 15.5v 88.2 note: the above dates only are as reference, you could make corresponding adjustme nt with actual output when they are at practical application.
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. k78xxt-500 b/0-2012 page 3 of 5 test configurations (ta=25 c) 1 efficiency and output voltage ripple test scope ceramic 7 9 5 vin gnd +vout c2 c1 25.4mm 1 2 . 5 4 m m dc/dc converter 470pf 6 c5 c3 25.4mm 12.7mm 1f 10f copper strip copper strip tantalum ceramic l o a d 2 start-up and load transient response test scope ceramic 7 9 5 vin gnd +vout c2 c1 50.8 mm 1 2 . 5 4 m m dc/dc converter 470pf 6 c5 c3 copper strip copper strip l o a d application example 1. to reduce output ripple, it is recommended to add a lc filter to output port. l: recommended parameter 10 h ~ 47 h. 7,9 5 vin gnd +vout 100f 1 dc/dc converter c1 22f 6 c5 470pf l o a d l shutdown control the on/off pin provides several features for adjusting and sequencing the power supply, a user has the flexibility of using the on/off pin as: 1) a digital on/off control by pulling down the on/off pin with an open-drain transistor. on/off 2) line uvlo. if desired to achieve a uvlo voltage, an resistor divider from vin to on/off to gnd can be used to disable the converter until a higher input voltage is achieved. for example, it is not useful for a converter with 12v output to start up with a 12v input voltage, as the output cannot teach regulation. to enable the converter when the input voltage reaches 14v, a 51k /5k resistor divider from vin to gnd can be connected to the on/off pin. both the precision 1.25v threshold and 150mv hysteresis are multiplied by the resistor ratio, providing a proportional 12% hysteresis for any startup threshold. so, the turn off threshold would be between 12.3v to 15.7v.
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. k78xxt-500 b/0-2012 page 4 of 5 7,9 5 vin gnd +vout 100f 1 dc/dc converter c1 6 470pf 10 51k 5k l o a d 3) power supply sequencing. by connecting a small capacitor from on/off to gnd, the 2 a current source and 1.25v threshold can provide a stable and predictable delay between startup of multiple power supplies. for example, a startup delay of roughly 64ms is provided using 100nf, and roughly 136ms by using 200nf. 7,9 5 vin gnd +vout 100f 1 dc/dc converter c1 6 470pf 10 100nf c5 l o a d ch1: von/off ch2: vo delay time: 64ms 7,9 5 vin gnd +vout 100f 1 dc/dc converter c1 6 470pf 10 200nf c5 l o a d ch1: von/off ch2: vo delay time: 136ms characteristic curve (ta=25 c) efficiency and output voltage ripple efficiency vs load (vin=rating) 0 10 20 30 40 50 60 70 80 90 100 20 50 80 120 160 200 240 280 320 360 400 440 480 500 550 load (ma) efficiency (%) k7803t-500 k7805t-500 K7809T-500 k7812t-500 k7815t-500 ripple vs load (vin=normal) 0 5 10 15 20 25 30 35 40 45 20 50 80 120160200240280320360400440480500550 load (ma) ripple (mv) k7803t-500 k7805t-500 K7809T-500 k7812t-500 k7815t-500 efficiency vs output load (vin=norm) output voltage ripple vs output load (vin=norm)
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. k78xxt-500 b/0-2012 page 5 of 5 efficiency vs vin (full load) 40 45 50 55 60 65 70 75 80 85 90 95 100 4.5 6 8 10 12 14 16 17 20 22 24 26 28 vin(v) efficiency (%) k7803t-500 k7805t-500 K7809T-500 k7812t-500 k7815t-500 ripple vs vin ( full load) 0 5 10 15 20 25 30 35 40 45 4.5 6 8 10 12 14 16 17 20 22 24 26 28 vin (v) ripple (mv) k7803t-500 k7805t-500 K7809T-500 k7812t-500 k7815t-500 efficiency vs input voltage (full load) output voltage ripple vs input voltage (full load) package style and pinning note: unit:mm[inch] pin section tolerances: 0.10mm[ 0.004inch] general tolerances: 0.25mm[ 0.010inch] note: unit :mm[inch] general tolerances: 0.50mm[ 0.020inch] l=530mm[20.866inch] devices per tube quantity: 33pcs l=220mm[8.661inch] devices per tube quantity: 13pcs (front view) (top view) shorttubeinnerpackagingdimensions: l*w*h=255*170*80mm; shorttubeouterpackaging dimensions (withsixinnerpackagingboxes): l*w*h=375*280*270mm; long tubeinnerpackagingdimensions: l*w*h=580*200*100mm; long tubeouterpackagingdimensions(withtwoinnerpackagingboxes) l*w*h=600*215*220mm; long tubeouterpackagingdimensions(with threeinnerpackagingboxes) l*w*h=600*215*325mm. 7 . 2 5 [ 0 . 2 8 5 ] 7 . 0 0 [ 0 . 2 7 6 ] 6 . 7 0 [ 0 . 2 6 4 ] 0.10[0.004] 1 9 10 10.16[0.400] 5.08[0.200] 0.60 0.10 [0.024 0.004] 15.24 0.50 [0.60 0.020] mechanical dimensions tube outline dimensions pin footprint details note: unit :mm[inch] general tolerances: 0.50mm[ 0.020inch] devices per reel quantity:500pcs devices per tube quantity: 2000pcs devices per tube quantity: 4000pcs inner packagingdimensions: l*w*h=365*350*105mm outer packagingdimensions: l*w*h=390*360*245mm. ; function taping dimension: taping reel dimension: 1 5 7,9 6 10 vadj vin gnd on/off vout (side view) ? 1.50 [0.059] ? 1.50 [0.059] ? 13.00 [0.512] ? 21.50 [0.846] 15.10[0.594] 10.70[0.421] 4.72 [0.186] 9 . 5 0 [ 0 . 3 7 4 ] 1 0 . 5 0 [ 0 . 4 1 3 ] 2.00 [0.079] 1.75 [0.069] 11.50 [0.453] 0.50 [0.020] 7.65 [0.301] 16.00 [0.630] 12.40 [0.488] 1 5 . 6 5 [ 0 . 6 1 6 ] 29.40 [1.157] ? 100.00[3.937] ? 3 3 0 . 0 0 [ 1 2 . 9 9 2 ] 2 4 . 0 0 [ 0 . 9 4 5 ] 1 1 . 0 2 [ 0 . 4 3 4 ] 1 . 8 0 [ 0 . 0 7 0 ] 1.00 [0.039] 2 . 7 0 [ 0 . 1 0 6 ] 12.10 0.30 [0.476 0.012] 10.05 0.20 [0.396 0.008] 1.15 0.20 [0.045 0.008] 1.87 0.20 [0.074 0.008] 5.08[0.200] 10.16 [0.400] a 0 . 2 5 0 . 1 0 [ 0 . 0 1 0 0 . 0 0 4 ] 0 ~ 5 5 6 7 8 . 5 0 0 . 2 0 [ 0 . 3 3 5 0 . 0 0 8 ] 2.54 0.20 [0.10 0.008] a 1 5 6 7 9 10 recommended footprint tapingreel dimensions note: grid:2.54*2.54mm note: 1. all specifications measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 2. in this datasheet, all the test methods of indications are based on corporate standards.
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