VXO7803-500-M-TR

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## g|ye UTIN 

## **SERIES:** VXO78-500-M **DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR **│** 

## **FEATURES** 

- ultra-thin SMD Package, thickness ≤3.5 mm 

- open frame 

- high efficiency up to 95% 

- no-load input current as low as 0.2 mA 

- wide temperature range: -40°C ~ +85°C 

- output short-circuit protection 

|**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)|(%)|
|VXO7803-500-M|24|4.75~36|3.3|500|1.65|50|86|
|VXO7805-500-M|24|6.5~36|5|500|2.5|50|90|
|VXO7809-500-M|24|12~36|9|500|4.5|50|93|
|VXO7812-500-M|24|15~36|12|500|6|50|94|
|VXO7815-500-M|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, 20~100% load for 3.3 Vdc model, 20 MHz bandwidth, with 10 µF electrolytic and 1 µF 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 specifications are measured at Ta=25°C, humidity < 75%, nominal input voltage, and rated output load unless otherwise specified. 

## **PART NUMBER KEY** 

## **- VXO78 XX 500 - M** 

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Base Number<br>**----- End of picture text -----**<br>


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Output Voltage Output Current<br>**----- End of picture text -----**<br>


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**date** 04/13/2020 **│ page** 2 of 6 

## **INPUT** 

|**INPUT**||
|---|---|
|**parameter**|**conditions/description**<br>**min**<br>**typ**<br>**max**<br>**units**|
|operating input voltage1|for positive output applications<br>24<br>36<br>Vdc|
|flter|capacitor flter|
|input reverse polarity protection|no|
|no-load input current|positive outputs<br>0.2<br>1.5<br>mA|
|Ctrl*2|module on<br>Ctrl pin open or pulled high (TTL 3.2-8VDC)|
||module off<br>Ctrl pin pulled low to GND (0-0.8VDC)|
||input current when off<br>30<br>100<br>µA|



Note: 1. See Model section on page 1 for specific input voltage ranges. 2. The Ctrl pin voltage is referenced to input GND. 

## **OUTPUT** 

|**OUTPUT**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|maximum capacitive load3|for positive output applications|||680|μF|
||at full load, input voltage range|||||
|voltage accuracy|3.3 Vdc output model||±2|±4|%|
||all other models||±2|±3|%|
|line regulation|at full load, input voltage range||±0.2|±0.4|%|
||at nominal input, 10~100% load|||||
|load regulation|3.3 Vdc output model||±0.6||%|
||all other models||±0.3||%|
|switching frequency|at nominal input voltage, full load||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 coeffcient|at full load|||±0.03|%/°C|



Note: 3. 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|EN62368-1|||||
|conducted emissions|CISPR32/EN55032   Class B (see Fig. 4-➁for recommended circuit)|||||
|radiated emissions|CISPR32/EN55032   Class B (see Fig. 4-➁for recommended circuit)|||||
|ESD|IEC/EN61000-4-2, contact ± 4kV, perf. Criteria B|||||
|radiated immunity|IEC/EN61000-4-3, 10V/m, perf. Criteria A|||||
|EFT/burst|IEC/EN61000-4-4, ± 1kV (see Fig. 4-➀for recommended circuit), perf. Criteria B|||||
|surge|IEC/EN61000-4-5, line-line ± 1kV (see Fig. 4-➀for|recommended circuit), perf. Criteria B||||
|conducted immunity|IEC/EN61000-4-6, 3 Vr.m.s, perf. Criteria A|||||
|MTBF|as per MIL-HDBK-217F, 25°C|2,000|||K hours|
|RoHS|2011/65/EU|||||



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**date** 04/13/2020 **│ page** 3 of 6 

## **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|5||95|%|
|**SOLDERABILITY**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|reflow soldering|Peak temp. ≤245°C, maximum duration time ≤60s|||260|°C|
||over 217°C. Please refer to IPC/JEDEC J-STD-020D.1|||||
|**MECHANICAL**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|dimensions|12.50 x 13.50 x 3.50 [0.492 x 0.531 x 0.138 inch]||||mm|
|weight|||0.9||g|



## **MECHANICAL DRAWING** 

units: mm [inch] tolerance: ±0.25[±0.010] pin diameter tolerance: ±0.10[±0.004] 

|PIN-OUT|PIN-OUT|
|---|---|
|PIN|FUNCTION|
|1|+Vin|
|2|GND|
|3|+Vo|
|4|Remote on/off|



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## **DERATING CURVE** 

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Temperature Derating Curve<br>120<br>100<br>80<br>60<br>Safe Operating Area<br>40<br>20<br>0<br>-40 0 40 71 85 120<br>Operating Temperature (°C)<br>Output Power (%)<br>**----- End of picture text -----**<br>


**Figure 1** 

## **EFFICIENCY CURVES** 

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VXO7805-500-M Efficiency Curve VXO7805-500-M Efficiency Curve<br>Efficiency vs. Input Voltage  Efficiency vs. Load Current<br>(at full load) (Vin = 24 V)<br>**----- End of picture text -----**<br>


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VXO78015-500-M Efficiency Curve<br>Efficiency vs. Input Voltage<br>(at full load)<br>**----- End of picture text -----**<br>


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VXO78015-500-M Efficiency Curve<br>Efficiency vs. Load Current<br>(Vin = 24 V)<br>**----- End of picture text -----**<br>


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**CUI Inc │ SERIES:** VXO78-500-M **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR 

**date** 04/13/2020 **│ page** 5 of 6 

## **TYPICAL APPLICATION CIRCUIT** 

## **Figure 2** 

## **Table 1** 

|**Table 1**|**Table 1**|**Table 1**|
|---|---|---|
|External Capacitor Table|||
|Model Number|C1, C3<br>(ceramic capacitor)|C2, C4<br>(ceramic capacitor)|
|VXO7803-500-M|10 μF/50 V|22 μF/10 V|
|VXO7805-500-M|10 μF/50 V|22 μF/16 V|
|VXO7809-500-M|10 μF/50 V|22 μF/25 V|
|VXO7812-500-M|10 μF/50 V|22 μF/25 V|
|VXO7815-500-M|10 μF/50 V|22 μF/25 V|



Note: 1.C1 and C2 (C3 and C4) are required and should be connected close to the pin terminal of the module. 

2.The capacitance of C1 and C2 (C3 and C4) refer to Sheet 1, it can be increased properly if required, and tantalum or low ESR electrolytic capacitors may also suffice. 

3.When the products used as the circuit like figure 3, an inductor named as LDM up to 10μH is recommended in the circuit to reduce the mutual interference. 4.Cannot be used in parallel for output and hot swap. 

To reduce the output ripple furtherly, it is suggested to connect a “LC” filter at the output terminal, and recommended value of L is 10µH-47µH. 

## **Figure 3** 

External “LC” output filter circuit diagram 

## **EMC RECOMMENDED CIRCUIT** 

## **Figure 4** 

## **Table 2** 

|**Table 2**|**Table 2**|
|---|---|
|Recommended external circuit components||
|FUSE|choose according to actual input current|
|LDM1|82 µH|
|C0, C3|330 µF/50 V|
|C4|see Table 1|
|C1, C2|10 µF/50 V|
|LDM2|22 µH|



Note: For EMC tests we use Part ① in Fig. 4 for immunity and part ➁ for emissions test. Selecting based on needs. 

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**CUI Inc │ SERIES:** VXO78-500-M **│ DESCRIPTION:** NON-ISOLATED DC SWITCHING REGULATOR 

**date** 04/13/2020 **│ page** 6 of 6 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|01/22/2020|
|1.01|Ctrl added|04/13/2020|



The revision history provided is for informational purposes only and is believed to be accurate. 

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