Additional Resources:
Product Page
|
3D Model
|
PCB Footprint
date
04/06/2023
page
1 of 6
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
input
voltage1
output
voltage
output
current
output
power
ripple
& noise2
efficiency3
typ
(Vdc)
range
(Vdc)
(Vdc)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
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
VXO78012-500-M
24
15~36
12
500
6
50
94
VXO78015-500-M
24
19~36
15
500
7.5
50
95
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 XXX - 500 - M - TR
Base Number
Output Voltage
Output Current
cui.com
Packaging:
TR = Tape and reel
Additional Resources:
Product Page
|
3D Model
|
PCB Footprint
CUI Inc │ SERIES: VXO78-500-M │ DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
date 04/06/2023 │ page 2 of 6
INPUT
parameter
conditions/description
operating input voltage1
for positive output applications
filter
capacitor filter
min
typ
max
units
24
36
Vdc
0.2
1.5
mA
input reverse polarity protection no
no-load input current
positive outputs
Ctrl*2
module on
Ctrl pin open or pulled high (TTL 3.2-8VDC)
module off
Ctrl pin pulled low to GND (0-0.8VDC)
input current when off
Note:
30
100
µA
typ
max
units
680
μF
1. See Model section on page 1 for specific input voltage ranges.
2. The Ctrl pin voltage is referenced to input GND.
OUTPUT
parameter
conditions/description
min
maximum capacitive load
for positive output applications
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
3.3 Vdc output model
all other models
±0.6
±0.3
switching frequency
at nominal input voltage, full load
700
transient recovery time
at nominal input voltage, 25% load step change
0.2
transient response deviation
at nominal input voltage, 25% load step change
50
temperature coefficient
at full load
3
Note:
%
%
kHz
1
ms
200
mV
±0.03
%/°C
3. The maximum capacitive load was tested at nominal input voltage, full load.
PROTECTIONS
parameter
conditions/description
short circuit protection
continuous, auto recovery
min
typ
max
units
min
typ
max
units
SAFETY AND COMPLIANCE
parameter
conditions/description
safety approvals
designed to meet 62368-1: EN, BS EN
conducted emissions
CISPR32/EN55032
Class B (see Fig. 4-2 for recommended circuit)
radiated emissions
CISPR32/EN55032
Class B (see Fig. 4-2 for 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. 4-1 for recommended circuit), perf. Criteria B
surge
IEC/EN61000-4-5, line-line ± 1kV (see Fig. 4-1 for 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
RoHS
2011/65/EU
2,000
cui.com
K hours
Additional Resources:
Product Page
|
3D Model
|
PCB Footprint
CUI Inc │ SERIES: VXO78-500-M │ DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
date 04/06/2023 │ page 3 of 6
ENVIRONMENTAL
parameter
conditions/description
min
max
units
operating temperature
see derating curve
-40
85
°C
-55
125
°C
5
95
%
max
units
260
°C
max
units
storage temperature
storage humidity
non-condensing
typ
SOLDERABILITY
parameter
conditions/description
min
reflow soldering
Peak temp. ≤245°C, maximum duration time ≤60s
over 217°C. Please refer to IPC/JEDEC J-STD-020D.1
typ
MECHANICAL
parameter
conditions/description
dimensions
12.50 x 13.50 x 3.50 [0.492 x 0.531 x 0.138 inch]
min
weight
typ
mm
0.9
MECHANICAL DRAWING
units: mm [inch]
tolerance: ±0.25[±0.010]
pin diameter tolerance: ±0.10[±0.004]
PIN-OUT
PIN
FUNCTION
1
+Vin
2
GND
3
+Vo
4
Remote on/off
cui.com
g
Additional Resources:
Product Page
|
3D Model
CUI Inc │ SERIES: VXO78-500-M │ DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
DERATING CURVE
Figure 1
EFFICIENCY CURVES
cui.com
|
PCB Footprint
date 04/06/2023 │ page 4 of 6
Additional Resources:
Product Page
|
3D Model
|
PCB Footprint
CUI Inc │ SERIES: VXO78-500-M │ DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
date 04/06/2023 │ page 5 of 6
TYPICAL APPLICATION CIRCUIT
Figure 2
Table 1
External Capacitor Table
Model Number
C1, C3
C2, C4
(ceramic capacitor) (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
VXO78012-500-M
10 μF/50 V
22 μF/25 V
VXO78015-500-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
Recommended external circuit components
Note:
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
For EMC tests we use Part ① in Fig. 4 for immunity and part ➁ for emissions test. Selecting based on needs.
cui.com
Additional Resources:
Product Page
|
3D Model
|
PCB Footprint
CUI Inc │ SERIES: VXO78-500-M │ DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
date 04/06/2023 │ page 6 of 6
REVISION HISTORY
rev.
description
date
1.0
initial release
01/22/2020
1.01
Ctrl added
04/13/2020
1.02
derating curve, efficiency curves and circuit figures updated
09/17/2021
1.03
PN for 12V & 15V model updated
09/04/2022
1.04
PN key updated
01/26/2023
1.05
safeties updated
04/06/2023
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.