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V78E09-500-SMT-TR
Non Isolated POL DC/DC Converter, Surface Mount DIP, 1 Output, 4.5 W, 9 V, 500 mA
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: CUI
- Product type: DC / DC Non Isolated Board Mount Converters - Fixed Output
- Available until stocks are exhausted
- SVHC: To Be Advised
- Depth: 15.24mm
- Width: 8.5mm
- Height: 8.25mm
- Product Range: V78-500-SMT Series
- No. of Outputs: 1 Output
- Output Power Max: 4.5W
- Output Current Max: 500mA
- Output Voltage Nom: 9V
- Input Voltage DC Max: 36V
- Input Voltage DC Min: 12V
- DC / DC Converter Type: Surface Mount DIP
- Power Supply Applications: -
- DC / DC Converter Mounting: Surface Mount Device
- DC / DC Converter Output Type: Fixed, Adjustable
| Delivery and price | |
|---|---|
| Units per pack | 100 |
| Price | 2.58 € |
| Current stock | 200+ |
| Lead time | 30 days |
Datasheet
Additional Resources: Product Page | 3D Model | PCB Footprint **date** 09/12/2018 **page** 1 of 10 ## **SERIES:** V78E-500-SMT **DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **│** ## **FEATURES** - 500 mA of output current - efficiency up to 95% - SMT package - industrial operating temp -40~+85°C - designed to meet IEC/EN 62368-1 - industry standard footprint - no load input current of 0.2 mA - output short circuit protection on output |@ce|||||||| |---|---|---|---|---|---|---|---| |**MODEL**|**voltage**|**input**<br>**voltage1**|**output**<br>**voltage**|**output**<br>**current**|**output**<br>**power**|**ripple**<br>**& noise2**|**efficiency3**| ||**typ**|**range**||**max**|**max**|**max**|**typ**| ||(Vdc)<br>(Vdc)||(Vdc)|(mA)|(W)|(mVp-p)|(%)| |V78E01-500-SMT|12|4.75~28|1.5|500|0.75|50|76| |V78E02-500-SMT|12|4.75~32|2.5|500|1.25|50|81| |V78E03-500-SMT|24|4.75~36|3.3|500|1.65|50|86| |V78E05-500-SMT|24|6.5~36|5|500|2.5|50|90| |V78E06-500-SMT|24|8~36|6.5|500|3.25|50|92| |V78E09-500-SMT|24|12~36|9|500|4.5|50|93| |V78E12-500-SMT|24|15~36|12|500|6|50|94| |V78E15-500-SMT|24|19~36|15|500|7.5|50|95| ## **MODEL** Notes: 1. For input voltages higher than 30 Vdc, a 22 µF / 50 V input capacitor is required. 2. Tested at nominal input, 20 MHz bandwidth, with 10 µF electrolytic and 1 µF ceramic capacitor on the output. For 1.5~3.3 Vdc output models, tested at 20~100% load. For all other models, tested at 10~100% load. At loads below 20% for 1.5~3.3 Vdc output models, the max ripple and noise will be 100 mVp-p. At loads below 10% for all other models, the max ripple and noise will be 150 mVp-p. 3. Measured at min Vin, full load. 4. All specifications are measured at Ta=25°C, humidity < 75%, nominal input voltage, and rated output load unless otherwise specified. ## **PART NUMBER KEY** **==> picture [287 x 61] intentionally omitted <==** **----- Start of picture text -----**<br> -<br>V78E XX 500-SMT-TR<br>Base Number a<br>Output Voltage Output Current<br>**----- End of picture text -----**<br> **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 2 of 10 |**INPUT**|||||| |---|---|---|---|---|---| |**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**| |operating input voltage5||4.75||36|Vdc| |flter|capacitor flter||||| |input reverse polartiy protection|no||||| |no-load input current|||0.2|1.5|mA| |remote on/of6|turn on (3.2~8 Vdc or open circuit)<br>turn of (<0.8 Vdc)<br>input current when switched of||0.03|0.1|mA| |Note:<br>5. See Model section on page 1 for specifc input voltage ranges.|||||| |6. The voltage of remote ON/OFF pin is relative to GND pin.|||||| |**OUTPUT**|||||| |**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**| |maximum capacitive load7||||680|μF| ||at full load, input voltage range||||| |voltage accuracy|1.5, 2.5, 3.3 Vdc output models||±2|±4|%| ||all other models||±2|±3|%| |line regulation|at full load, input voltage range||±0.2|±0.4|%| ||at 10~100 % load, input voltage range||||| |load regulation|1.5, 2.5 Vdc output models|||±1|%| ||all other models|||±0.6|%| |voltage adjustment|input voltage range||±10||%Vo| ||at full load, input voltage range||||| |switching frequency|1.5 Vdc output model||370||kHz| ||all other models||700||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|200|mV| |temperature coefcient|operating temperature -40 °C to +85 °C|||±0.03|%/°C| |Note:<br>7. The maximum capacitive load|was tested at nominal input voltage, full load.||||| ## **PROTECTIONS** |**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|CE||||| |conducted emissions|CISPR32/EN55032, class B (external circuit required, see Figure 3-b)||||| |radiated emissions|CISPR32/EN55032, class B (external circuit required, see Figure 3-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 3-a)||||| |surge|IEC/EN61000-4-5, line-line ± 1kV, class B (external circuit required, see Figure|||3-a)|| |conducted immunity|IEC/EN61000-4-6, 3 Vr.m.s, class A||||| |MTBF|as per MIL-HDBK-217F, 25°C|2,000,000|||hours| |RoHS|yes||||| **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 3 of 10 ## **ENVIRONMENTAL** |**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|||||||95|%| |**SOLDERABILITY**|||||||||| |**parameter**|**conditions/description**|||||**min**|**typ**|**max**|**units**| |reflow soldering|see reflow profile, refer to IPC/JEDEC J-STD-020D.1|||||||245|°C| ||Temperature (°C)<br>250<br>245<br>217<br>200<br>150<br>100<br>50||60 Sec Max<br>(>217°C)||Peak Temp 245°C (Max)|Peak Temp 245°C (Max)|||| ||0||||||||| |||Time (sec)|||||||| |**MECHANICAL**|||||||||| |**parameter**|**conditions/description**|||||**min**|**typ**|**max**|**units**| |dimensions|15.24 x 8.50 x 8.25 [0.60 x 0.335 x 0.325 inch]||15.24 x 8.50 x 8.25 [0.60 x 0.335 x 0.325 inch]||15.24 x 8.50 x 8.25 [0.60 x 0.335 x 0.325 inch]||||mm| |case material|black flame-retardant and heat resistant plastic (UL94V-0)||||||||| |weight|||||||1.5||g| ## **MECHANICAL DRAWING** units: mm [inch] tolerance: ±0.50[±0.020] pin section tolerance: ±0.10[±0.004] |PIN CONNECTIONS|PIN CONNECTIONS| |---|---| |PIN|FUNCTION| |1|+VIN| |2|+VIN| |3|GND| |4|+VOUT| |5|+VOUT| |6|V adj| |7|GND| |10|remote on/off| Recommended PCB Layout Note:* GridGri 2.54*2.54mm* Top View **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 4 of 10 ## **DERATING CURVE** **==> picture [504 x 624] intentionally omitted <==** **----- Start of picture text -----**<br> Temperature Derating Curve<br>(Natural Convection)<br>120<br>100<br>80<br>60<br>40<br>20<br> 0<br>-40 0 40 71 85 120<br>Ambient Temperature (°C)<br>EFFICIENCY CURVES<br>V78E01-500-SMT Efficiency Curve V78E01-500-SMT Efficiency Curve<br>Efficiency vs. Input Voltage Efficiency vs. Load Current<br>(at full load) (at Vin nominal)<br>90 100<br>85 90<br>80 80<br>75 70<br>70 60<br>65 50<br>60 40<br>55 30<br>50 20<br>45 10<br>40 fo 0<br>4.75 7 10 12 15 18 20 22 25 28 5 10 20 30 40 50 60 70 80 90 100<br>Input Voltage (Vdc) Output Current (%)<br>V78E02-500-SMT Efficiency Curve V78E02-500-SMT Efficiency Curve<br>Efficiency vs. Input Voltage Efficiency vs. Load Current<br>(at full load) (at Vin nominal)<br>90 100<br>85 90<br>80 80<br>75 70<br>70 60<br>65 50<br>60 40<br>55 30<br>50 20<br>45 10<br>40 a 0<br>4.75 8 11 14 17 20 23 26 29 32 5 10 20 30 40 50 60 70 80 90 100<br>Input Voltage (Vdc) Output Current (%)<br>Load (%)<br>Efficiency (%) Efficiency (%)<br>Efficiency (%) Efficiency (%)<br>**----- End of picture text -----**<br> ## **EFFICIENCY CURVES** **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 5 of 10 ## **EFFICIENCY CURVES (CONTINUED)** **==> picture [502 x 199] intentionally omitted <==** **----- Start of picture text -----**<br> V78E03-500-SMT Efficiency Curve V78E03-500-SMT Efficiency Curve<br>Efficiency vs. Input Voltage Efficiency vs. Load Current<br>(at full load) (at Vin nominal)<br>100 100<br>95 90<br>90 80<br>85 70<br>80 60<br>75 50<br>70 40<br>65 30<br>60 20<br>55 10<br>50 ame 0<br>4.75 8 12 16 20 24 28 31 34 36 5 10 20 30 40 50 60 70 80 90 100<br>Input Voltage (Vdc) Output Current (%)<br>Efficiency (%) Efficiency (%)<br>**----- End of picture text -----**<br> **==> picture [506 x 422] intentionally omitted <==** **----- Start of picture text -----**<br> V78E05-500-SMT Efficiency Curve V78E05-500-SMT Efficiency Curve<br>Efficiency vs. Input Voltage Efficiency vs. Load Current<br>(at full load) (at Vin nominal)<br>100 100<br>95 90<br>90 80<br>85 70<br>80 60<br>75 50<br>70 40<br>65 30<br>60 20<br>55 10<br>50 HE 0<br> 6.5 10 13 16 20 24 27 30 33 36 5 10 20 30 40 50 60 70 80 90<br>Input Voltage (Vdc) Output Current (%)<br>V78E06-500-SMT Efficiency Curve V78E06-500-SMT Efficiency Curve<br>Efficiency vs. Input Voltage Efficiency vs. Load Current<br>(at full load) (at Vin nominal)<br>100 100<br>95 90<br>90 80<br>85 70<br>80 60<br>75 50<br>70 40<br>65 30<br>60 20<br>55 10<br>50 oe 0<br> 8 11 14 17 20 24 27 30 33 36 5 10 20 30 40 50 60 70 80 90 100<br>Input Voltage (Vdc) Output Current (%)<br>Efficiency (%) Efficiency (%)<br>Efficiency (%) Efficiency (%)<br>**----- End of picture text -----**<br> **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 6 of 10 ## **EFFICIENCY CURVES (CONTINUED)** **==> picture [233 x 199] intentionally omitted <==** **----- Start of picture text -----**<br> V78E09-500-SMT Efficiency Curve<br>Efficiency vs. Input Voltage<br>(at full load)<br>100<br>95<br>90<br>85<br>80<br>75<br>70<br>65<br>60<br>55<br>50<br> 12 15 18 21 24 27 30 33 36<br>Input Voltage (Vdc)<br>Efficiency (%)<br>**----- End of picture text -----**<br> V78E09-500-SMT Efficiency Curve Efficiency vs. Load Current (at Vin nominal) **==> picture [505 x 602] intentionally omitted <==** **----- Start of picture text -----**<br> 100 100<br>95 90<br>90 80<br>85 70<br>80 60<br>75 50<br>70 40<br>65 30<br>60 20<br>55 10<br>50 0<br> 12 15 18 21 24 27 30 33 36 5 10 20 30 40 50 60 70 80 90 100<br>Input Voltage (Vdc) Output Current (%)<br>V78E12-500-SMT Efficiency Curve V78E12-500-SMT Efficiency Curve<br>Efficiency vs. Input Voltage Efficiency vs. Load Current<br>(at full load) (at Vin nominal)<br>100 100<br>95 90<br>90 80<br>85 70<br>80 60<br>75 50<br>70 40<br>65 30<br>60 20<br>55 10<br>50 0<br> 15 18 20 22 24 27 30 33 36 5 10 20 30 40 50 60 70 80 90 100<br>Input Voltage (Vdc) Output Current (%)<br>V78E15-500-SMT Efficiency Curve V78E15-500-SMT Efficiency Curve<br>Efficiency vs. Input Voltage Efficiency vs. Load Current<br>(at full load) (at Vin nominal)<br>100 100<br>95 90<br>90 80<br>85 70<br>80 60<br>75 50<br>70 Poe 40 ee<br>65 30<br>60 20<br>55 10<br>50 0<br>19 21 23 25 27 29 31 33 35 36 5 10 20 30 40 50 60 70 80 90<br>Input Voltage (Vdc) Output Current (%)<br>Efficiency (%) Efficiency (%)<br>Efficiency (%) Efficiency (%)<br>Efficiency (%) Efficiency (%)<br>**----- End of picture text -----**<br> **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 7 of 10 ## **TYPICAL APPLICATION CIRCUIT** **Figure 1** Application Circuit ## **Figure 2** LC Filter Application Circuit **Table 1** |Model Number|C1<br>(ceramic capacitor)|C2<br>(ceramic capacitor)|Ra1/Ra2<br>(Vadj resistance)| |---|---|---|---| |V78E01-500-SMT|10 μF/50 V|22 μF/10 V|refer to Vadj<br>resistance<br>calculation| |V78E02-500-SMT|10 μF/50 V|22 μF/10 V|| |V78E03-500-SMT|10 μF/50 V|22 μF/10 V|| |V78E05-500-SMT|10 μF/50 V|22 μF/16 V|| |V78E06-500-SMT|10 μF/50 V|22 μF/16 V|| |V78E09-500-SMT|10 μF/50 V|22 μF/25 V|| |V78E12-500-SMT|10 μF/50 V|22 μF/25 V|| |V78E15-500-SMT|10 μF/50 V|22 μF/25 V|| ## **EMC RECOMMENDED CIRCUIT** **Figure 3** **Table 2** |**Table 2**|**Table 2**| |---|---| |Recommended external circuit components|| |FUSE|choose according to actual input current| |MOV|S20K30| |LDM1|82 µH| |C0|680 µF/50 V| |C1, C2|refer to table 1| |C5|4.7 µF/50 V| |LDM2|12 µH| 8. C1 & C2 are required and should be connected as close to the module pins as possible. 9. C1 & C2 can be increased as needed and the use of tantalum or low ESR electrolytic capacitors would be recommended. 10. To reduce the output ripple further, it is recommended to add an “LC” filter at the output (see figure 2) with a 10~47 µH L component. Note: **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 8 of 10 ## **APPLICATION NOTES** 1. **Output voltage trimming** Leave open if not used. ## **Figure 4** Application Circuit for Trim pin (part in broken line is the interior of models) **==> picture [183 x 117] intentionally omitted <==** **----- Start of picture text -----**<br> Vo’ Vo’<br>R1<br>R3 R1 Ra1<br>Vref Vadj R3<br>Vref Vadj<br>R2 Ra2<br>R2<br>0V 0V<br>**----- End of picture text -----**<br> Formula for Trim Resistor **a R2 Vref up: Ra2= -R3 a = R1 R2-a Vo’-Vre f a R1 Vo’-Vre f down: Ra1= -R3 a = R2 R1-a Vref** Note: Value for R1, R2, R3, and Vref refer to Table 3 Ra1/Ra2: Trim Resistor - a: User-defined parameter, no actual meanings Vo': The trim up/down voltage ## **Table 3** |Vout<br>(Vdc)|R1<br>(kΩ)|R2<br>(kΩ)|R3<br>(kΩ)|Vref<br>(V)| |---|---|---|---|---| |1.511|7.5|7.5|15|0.75| |2.5|27|11.858|51|0.765| |3.3|33|9.9|47|0.765| |5|75|13.5|75|0.765| |6.5|75|10|51|0.765| |9|51|4.7|27|0.765| |12|75|5.1|27|0.765| |15|82|4.423|27|0.765| Note: 11. The 1.5 Vdc output model can only be adjusted up. **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 9 of 10 ## **PACKAGING** units: mm Reel Size: Ø330 mm Reel QTY: 300 pcs per tray Carton Box Size: 400 x 365 x 255 mm Carton Box QTY: 1,800 pcs per carton box **cui** .com Additional Resources: Product Page | 3D Model | PCB Footprint **CUI Inc │ SERIES:** V78E-500-SMT **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **date** 09/12/2018 **│ page** 10 of 10 ## **REVISION HISTORY** |**rev.**|**description**|**date**| |---|---|---| |1.0|initial release|09/12/2018| The revision history provided is for informational purposes only and is believed to be accurate. **Headquarters** 20050 SW 112th Ave. Tualatin, OR 97062 **800.275.4899** Fax 503.612.2383 **cui** .com techsupport@cui.com 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 safety or effectiveness.
Updated at April 23, 2026
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