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V7815-500-SMT-TR
NON ISOLATED POL DC TO DC CONVERTERS
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: BEL / PARTNER STOCK
- Product type: DC / DC Non Isolated Board Mount Converters - Fixed Output
- SVHC: To Be Advised
- Product Range: V78-500-SMT Series
| Delivery and price | |
|---|---|
| Units per pack | 90 |
| Price | 6.64 € |
| Current stock | 100+ |
| Lead time | 30 days |
Datasheet
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|---|---|---|---|---|---|---|---|---|---|---|
|Additional Resources: Product Page|
|date|10/05/2023|
|page|1 of 8|
|SERIES:|V78-500-SMT|DESCRIPTION:|NON-ISOLATED SWITCHING REGULATOR|
|FEATURES|
|• 500 mA current output|
|• high efficiency up to 96%|
|• no heat sink required|
|• SMT package|
|• remote on/off control|
|• low ripple and noise|
|• short circuit protection, thermal shutdown|
|• wide temperature (-40°C~+85°C)|
|ane]|
|RoHS|
|MODEL|input|output|output|output|ripple and|
|voltage|voltage|current|power|noise|[1]|
|range|max|max|Vin min|Vin max|
|(Vdc)|(Vdc)|(Vdc)|(mA)|(W)|(mVp-p)|(%)|(%)|
|V7803-500-SMT*|12|4.5 ~ 28|3.3|500|1.65|25|90|75|
|V7805-500-SMT|12|6 ~ 28|5|500|2.5|25|94|81|
|V7812-500-SMT|[2]|24|14 ~ 28|12|500|6|25|95|90|
|V7815-500-SMT|[2,]|*|24|17 ~ 28|15|500|7.5|25|96|92|
|Notes: 1. ripple & noise are measured at 20 MHz BW with 1 µF ceramic cap and 10 µF electrolytic capacitors on the output|
|ii 2. must operate with a minimum of 5% loading|
|ii 3. * Discontinued model|
|ii 4. Tape and reel option discontinued.|
|PART NUMBER KEY|
|-|
|V78 XX|XXX -SMT-|X|
|YT\\|
|Base Number|Output Voltage|Output Current|Package Options|
|TR = Tape & Reel|
|cui|.com|
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Additional Resources: Product Page
**date** 10/05/2023 **page** 2 of 8
**CUI Inc SERIES:** V78-500-SMT **DESCRIPTION:** NON-ISOLATED SWITCHING REGULATOR
|**INPUT**<br>**parameter**<br>input voltage<br>threshold voltage<br>shutdown input current<br>**OUTPUT**|**conditions/description**<br>3.3 Vdc output<br>5 Vdc output<br>12 Vdc output<br>15Vdc output<br>on:<br>GND or 0V<Vc<1V||**min**<br>4.5<br>6<br>14<br>17<br>1.1|**max**<br>**units**<br>12<br>12<br>24<br>24<br>28<br>28<br>28<br>28<br>Vdc<br>Vdc<br>Vdc<br>Vdc<br>1.25<br>1.4<br>Vdc<br>2<br>µA<br>15<br>30<br>µA<br>ED|**max**<br>**units**<br>12<br>12<br>24<br>24<br>28<br>28<br>28<br>28<br>Vdc<br>Vdc<br>Vdc<br>Vdc<br>1.25<br>1.4<br>Vdc<br>2<br>µA<br>15<br>30<br>µA<br>ED|**max**<br>**units**<br>12<br>12<br>24<br>24<br>28<br>28<br>28<br>28<br>Vdc<br>Vdc<br>Vdc<br>Vdc<br>1.25<br>1.4<br>Vdc<br>2<br>µA<br>15<br>30<br>µA<br>ED|
|---|---|---|---|---|---|---|
|**parameter**|**conditions/description**||**min**||**max**|**units**|
|max capacitive load|||||1000|µF|
|line regulation|measured from low line to high line at 100% load|||±0.2|±0.5|%|
|load regulation<br>measured from 10% to full load at nominal input<br>voltage accuracy<br>measured from low line to high line at 100% load<br>adjustability1<br>see application notes<br>Notes:<br>1. output voltage adjustment must meet Vin-Vo > 2V requirement<br>**PROTECTIONS**<br>**parameter**<br>**conditions/description**<br>**min**<br>short circuit protection<br>hiccup, continuous, automatic recovery<br>thermal shutdown<br>internal IC junction<br>current limit<br>**SAFETY AND COMPLIANCE**<br>**parameter**<br>**conditions/description**<br>**min**<br>RoHS<br>2011/65/EU<br>MTBF<br>as per MIL-HDBK-217F, 25°C<br>2,000,000<br>**ENVIRONMENTAL**<br>**parameter**<br>**conditions/description**<br>**min**<br>case operating temperature<br>operating temperature<br>see derating curve<br>-40<br>storage temperature<br>-55<br>storage humidity<br>SCONTI||||±0.3<br>±2<br>160<br>1.8|±0.75<br>±3<br>±0.02<br>**max**<br>**max**<br>**max**<br>100<br>85<br>125<br>95|%<br>%<br>%/°C<br>**units**<br>°C<br>A<br>**units**<br>hours<br>**units**<br>°C<br>°C<br>°C<br>%|
|hand soldering|for 10 seconds||||300|°C|
||||||240|°C|
||refer to IPC/JEDEC J-STD-020D.1||||||
**cui** .com
Additional Resources: Product Page
**date** 10/05/2023 **page** 3 of 8
**CUI Inc SERIES:** V78-500-SMT **DESCRIPTION:** NON-ISOLATED SWITCHING REGULATOR
## **DERATING CURVES**
##
## **MECHANICAL**
|**MECHANICAL DRAWING**<br>**parameter**<br>**conditions/description**<br>dimensions<br>15.24 x 8.30 x 7.25 (0.600 x 0.327 x 0.285 inch)<br>case material<br>plastic (UL94-V0)<br>weight<br>units: mm [in]<br>pin tolerance: ±0.10 mm [±0.004 in]<br>general tolerance: ±0.25 mm [±0.010 in]<br>**PIN CONNECTIONS**<br>1<br>Vin<br>5<br>Vout<br>6<br>Vadj<br>7<br>GND<br>9<br>GND<br>10<br>CONTI<br>=—15.2440.50[0.600+0.020) =<br>10.16 [0.400]<br>—x<br>1s--2.54 [0.100]<br>\<br>1<br>-<br>ff<br>Nf<br>|<br>A<br>cs<br>10<br>9<br>7<br>6<br>i<br>3<br>B3<br>FA<br>=<br>ee<br>ee<br>Ba<br>1<br>5<br>18<br>I<br>I<br>a|**min**|2.3<br>4 <br>“10 <br>go<br>|<br>Ss<br>\<br>**a**<br>|<br>|<br>+ 1<br>: a <br>=<br>1.00 [0.039}--|<br>+|**max**<br>**units**<br>mm<br>g<br> E oF [ Eia<br> 9<br>6.)<br>4<br>|<br>2<br>i<br>Ss<br>Top View<br>|<br>=<br>ls<br> ee ee<br>zs |<br>re<br>10,16 (0.400)<br>——|
|---|---|---|---|
|D<br>Sh<br>a<br>Fy<br>a8<br>ss<br>”ke<br>4<br>ae!<br>— 0.88 (0.035)<br>0.10}|A|Note:|Grid 2.54*2.54mm|
**cui** .com
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Additional Resources: Product Page<br>CUI Inc SERIES: | V78-500-SMT | DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 10/05/2023 | page 4 of 8<br>PACKAGING DIMENSIONS<br>Taping dimension:<br>1.75 [0.069]<br>∅1.50 [0.059] 2.00 [0.079] 11.50 [0.453] tT 0.50 [0.020]<br>14.70 [0.579] p—o—o-0-6 vee ¢ 6646-0 4<br>10.20[0.402]<br>12.40 [0.488] ne 16.00 [0.630] ∅1.50 [0.059] | 7.65 [0.301]<br>Taping reel dimension:<br>29.40 [1.157]<br>5.60 [0.220] —— 4ka|<br>∅100.00[3.937]<br>Note:<br>Unit :mm[inch]<br>General tolerances: + 0.50mm[ + 0.020inch]<br>\\<br>L=530mm[20.866inch] Tube Quantity: 33pcs<br>∅13.00 [0.512]<br>L=220mm[8.661inch] Tube Quantity: 13pcs Note: ∅21.50 [0.846]<br>Unit :mm[inch]<br>General tolerances: + 0.50mm[ + 0.020inch]<br>Devices per reel quantity:500pcs<br>TYPICAL APPLICATION CIRCUIT<br>V78XX-500-SMT<br>1 5<br>Vin Vo<br>GND R1<br>vin & 7,9 I : Vo<br>— C2 = =«+|c3<br>100pF<br>=, ||r2<br>470pF<br>2. C1, C2, & C3 are required and should be placed close to the pins of the converter, with shortest possible leads.<br>3. R1 is used when trimming down. R2 is used when trimming up.<br>4. No parallel connection or plug and play.<br>SCONTINUED<br>15.65 [0.616]<br>[0.323]<br>[0.402]<br>[0.256] 8.20<br>10.20<br>6.50<br>330.00 [12.992]<br>∅<br>**----- End of picture text -----**<br>
Note: Unit :mm[inch] General tolerances: ~~+~~ 0.50mm[ ~~+~~ 0.020inch]
|3. R1 is used when trimming down. R2 is used when trimming up.<br>4. No parallel connection or plug and play.|3. R1 is used when trimming down. R2 is used when trimming up.|3. R1 is used when trimming down. R2 is used when trimming up.|
|---|---|---|
|Part Number|C1<br>(ceramic capacitor)|C2<br>(ceramic capacitor)|
|V7803-500-SMT|10uF/50V|22uF/16V|
|V7805-500-SMT|10uF/50V|22uF/16V|
|V7812-500-SMT|10uF/50V|10uF/25V|
|V7815-500-SMT|10uF/50V|10uF/25V|
**cui** .com
Additional Resources: Product Page
**date** 10/05/2023 **page** 5 of 8
**CUI Inc SERIES:** V78-500-SMT **DESCRIPTION:** NON-ISOLATED SWITCHING REGULATOR
|**OUTPUT TRIMMING**<br>V7815-500-SMT<br>V7812-500-SMT<br>V7805-500-SMT<br>V7803-500-SMT<br>Part Name<br>Vo nom<br>3.3V<br>5.0V<br>12V<br>15V<br>Trim Down<br>Trim Up<br>R2(K<br>)<br>Ω<br>R1(KΩ)<br>75.10-10*Vo<br>Vo-3.3<br>61*Vo-75.10<br>3.3-Vo<br>269.37-15*Vo<br>Vo-15<br>66*Vo-269.37<br>15-Vo<br>=<br>91.52-10*Vo<br>Vo-5.0<br>=<br>287.02-20*Vo<br>Vo-12<br>=<br>~~=~~<br>=<br>61*Vo-91.52<br>5.0-Vo<br>=<br>71*Vo-287.02<br>12-Vo<br>=<br>=<br>To trim the output of the device input the desired output voltage (Vo) into the proper equation.<br>R1 trims the output voltage down and R2 trims the voltage up. If not using the trim feature<br>R1 and R2 are left open. Make sure that the desired output voltage is within the trim range.<br>**TEST CIRCUIT**<br>NUED<br>ee~~ee~~<br>~~ee~~<br>|-—25.4mm—>|+——_25.4 mm——|**OUTPUT TRIMMING**<br>V7815-500-SMT<br>V7812-500-SMT<br>V7805-500-SMT<br>V7803-500-SMT<br>Part Name<br>Vo nom<br>3.3V<br>5.0V<br>12V<br>15V<br>Trim Down<br>Trim Up<br>R2(K<br>)<br>Ω<br>R1(KΩ)<br>75.10-10*Vo<br>Vo-3.3<br>61*Vo-75.10<br>3.3-Vo<br>269.37-15*Vo<br>Vo-15<br>66*Vo-269.37<br>15-Vo<br>=<br>91.52-10*Vo<br>Vo-5.0<br>=<br>287.02-20*Vo<br>Vo-12<br>=<br>~~=~~<br>=<br>61*Vo-91.52<br>5.0-Vo<br>=<br>71*Vo-287.02<br>12-Vo<br>=<br>=<br>To trim the output of the device input the desired output voltage (Vo) into the proper equation.<br>R1 trims the output voltage down and R2 trims the voltage up. If not using the trim feature<br>R1 and R2 are left open. Make sure that the desired output voltage is within the trim range.<br>**TEST CIRCUIT**<br>NUED<br>ee~~ee~~<br>~~ee~~<br>|-—25.4mm—>|+——_25.4 mm——|**OUTPUT TRIMMING**<br>V7815-500-SMT<br>V7812-500-SMT<br>V7805-500-SMT<br>V7803-500-SMT<br>Part Name<br>Vo nom<br>3.3V<br>5.0V<br>12V<br>15V<br>Trim Down<br>Trim Up<br>R2(K<br>)<br>Ω<br>R1(KΩ)<br>75.10-10*Vo<br>Vo-3.3<br>61*Vo-75.10<br>3.3-Vo<br>269.37-15*Vo<br>Vo-15<br>66*Vo-269.37<br>15-Vo<br>=<br>91.52-10*Vo<br>Vo-5.0<br>=<br>287.02-20*Vo<br>Vo-12<br>=<br>~~=~~<br>=<br>61*Vo-91.52<br>5.0-Vo<br>=<br>71*Vo-287.02<br>12-Vo<br>=<br>=<br>To trim the output of the device input the desired output voltage (Vo) into the proper equation.<br>R1 trims the output voltage down and R2 trims the voltage up. If not using the trim feature<br>R1 and R2 are left open. Make sure that the desired output voltage is within the trim range.<br>**TEST CIRCUIT**<br>NUED<br>ee~~ee~~<br>~~ee~~<br>|-—25.4mm—>|+——_25.4 mm——|
|---|---|---|
|N<br><-12.7 mm-><br>Vin<br>|<br>pDc-pc_<br>*vo<br>CopperSheet<br>C2<br>|C3<br>|1pF<br>10uF<br>cope:<br>470pF<br>Ceramic<br>{Tantalum<br>C5| ceramic<br>Copper Sheet é|:<br>||Load|
|DIS<br>ko 50.8mm———_><br>Vin<br>pc-pc_<br>*v°<br>CopperSheet<br>=<br>C2<br>1c3<br>Scope <br>470pF<br>C5 | ceramic<br>CopperSheet 4|3<br>7<br>||Load|
**cui** .com
Additional Resources: Product Page **CUI Inc SERIES:** V78-500-SMT **DESCRIPTION:** NON-ISOLATED SWITCHING REGULATOR **date** 10/05/2023 **page** 6 of 8 **EFFICIENCY AND RIPPLE** EFFICIENCY VS OUTPUT LOAD RIPPLE VS OUTPUT LOAD (Vin = Norm) (Vin = Norm) ‘2 |_|ety eLLLLITITTTttttdtd]Sfony45 = 20| ja oo sit tt tt tt tt tt tt |) po s 7 ipY v7803-500-SMT S 30 Pt tT tT tT TT V7803-500-SMT > of | | [| | ft tt ft tt tty -™7T+TPTrrprLtte~e__tLtFtt| —_ owta a oe | | 7).12805S00 sr t tt | tt Pt PP & 20 i eAmu vrt-so0 sr eit | | ttt tT tT tt Tt Td petesco snr 30 a 2 15 ee ee eee 20Po peters sie >= ————————_ wo _ ttt tt tt tt tt tt Ss eS = —=—=—=== a V7815-500-SMT >_tLtt20 50 80 120 160tT 200| 240tt280 320i 360tt400 440i 480tt500 |550 op20LITT???50 80 120 160 200 240 280 320 360tt400 440tt480 ot500 |550 Output Current (mA) Output Current (mA) EFFICIENCY VS INPUT VOLTAGE RIPPLE VS INPUT VOLTAGE (full load) (full load) 10090 pf ff ff nt | Key 45 YP {| [ | [ | JT 7 | Tf 7 Ty K g | Qs & 880 | | | em”!SSS) V7803-500-SMTreson co BO75 V7803-500-SMTrrr a 2 t/t], 1 | | | tT | | te tT | 6 Cee etwre s00-ster Ss ot | | vpe05 500-50 2& 6ot | | | i | | ft | yt ft} wet2so0-smr ery= 20 yy yyEt Cs wrstz.s00-smtr sof +sr 8ts-S00-sar 910 |} 7815-500-SMT eg A | get | | | | t— t [ [T tT Tf 0 TL tT | | tT | | [ [| | [ ff 45 6 8 10 12 14 16 17 20 22 24 26 28 45 6 8 10 12 14 16 17 20 22 24 26 28 Input Voltage (V) Input Voltage (V) **cui** .com
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Additional Resources: Product Page<br>CUI Inc SERIES: V78-500-SMT DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 10/05/2023 page 7 of 8<br>SHUTDOWN CONTROL<br>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:<br>1) A digital on/off control by pulling down the ON/OFF pin with an open-drain transistor.<br>2) Line UVLO. If desired to achieve a UVLO voltage, a resistor divider from Vin to ON/OFF to GND can be used to disable the converter until<br>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 , as the<br>output cannot each regulation. To enable the converter when the input voltage reaches 14V, a 51kΩ/5kΩ voltage divider from Vin to GND<br>can be connected to the ON/OFF pin. Both the precision 1.25V threshold and 150mV hysteresis are multiplied by the resistor ratio,<br>providing a proportional 12% hysteresis for any startup threshold. So, the turn off threshold would be between 12.3V to 15.7V.<br>V78XX-500-SMT<br>Vin +Vout<br>1 V78XX-500-SMT 5<br>51KΩ 10 8 7,9 6<br>e + C1 100 F<br>Vin 5KΩ be] Vin +Vo 470pF 100pF Load<br>GND = C1<br>i 470pF<br>3) Power supply sequencing. By connecting a small capacitor from ON/OFF to GND, the 2 UW A current source and 1.25V threshold can provide<br>a stable and predictable delay between startup of multiple power supplies. For example, a startup delay of roughly 64mS is provided using<br>100nF, and roughly 136mS by using 200nF. : — : —_ — —<br>i3 u¥ :: A:@: 64.0ms1.32V<br>j r @: 2.40ms<br>V78XX-500-SMT Hl t<br>Vi n +Vout<br>1 V78XX-500-SMT Vin +Vo 5 i i<br>GND t t<br>C1 10 7,9 6<br>Vin C5 toour 100 < F Loa 2 |<br>470pF<br>GND 100nF 470pF I|<br>CH1: Von/off<br>CH2: Vo<br>Delay time: 64mS<br>V78XX-500-SMTVin +Vo F:U xf¢i: <BS@: -134msjH e at)ns<br>Vin +Vout<br>1 V78XX-500-SMT GND 5 i i<br>Vin C1 10 7,9 6 tone < Load<br>C5 470pF 100 F i<br>470pF<br>GND 200nF<br>CH1: Von/off<br>CH2: Vo<br>Delay time: 136mS<br>DISCONTINUED<br>oad<br>L<br>oad<br>L<br>oad<br>L<br>**----- End of picture text -----**<br>
**cui** .com
Additional Resources: Product Page
**date** 10/05/2023 **page** 8 of 8
**CUI Inc SERIES:** V78-500-SMT **DESCRIPTION:** NON-ISOLATED SWITCHING REGULATOR
|**rev.**<br>**description**<br>1.0<br>initial release<br>1.01<br>new template applied<br>1.02<br>1.03<br>added TRpackage option<br>1.04<br>added minimum loadingrequirement note<br>1.05<br>updated spec<br>1.06<br>housingwidth changed, updated datasheet<br>**REVISION HISTORY**|**date**<br>01/04/2008<br>04/28/2009<br>09/06/2012<br>10/31/2012<br>01/30/2013<br>03/08/2013<br>01/26/2016<br>ED|**date**<br>01/04/2008<br>04/28/2009<br>09/06/2012<br>10/31/2012<br>01/30/2013<br>03/08/2013<br>01/26/2016<br>ED|
|---|---|---|
|1.07<br>discontinued V7815-500-SMT model|06/24/2019||
|1.08|09/14/2020||
|1.09|08/17/2021||
|1.10<br>standardpackagingdiscontinued, PN keyupdated|05/30/2022||
|**Headquarters**<br>20050 SW 112th Ave.<br>Tualatin, OR 97062<br>Fax 503.612.2383<br>**cui**.com<br>1.11<br>discontinued model V7803-500-SMT, V7803-500-SMT-TR,<br>V7815-500-SMT-TR<br>10/05/2023<br>The revision history provided is for informational purposes only and is believed to be accurate.<br>DISCONT<br><F CUIINC|||
|**800.275.4899**<br>techsupport@cui.com<br>a bel group|||
|CUI offers a two (2) year limited warranty.<br>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
Updated at April 23, 2026
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