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product page.
date
page
05/25/2014
1 of 5
SERIES:
VBT1-SMT
│
DESCRIPTION:
DC-DC CONVERTER
• 1 W isolated output
• industry standard 8 pin SMT package
• single unregulated outputs
• 1,000 V isolation
• short circuit protection
• UL safety approvals (some models)
• wide temperature (-40~85°C)
• efficiency up to 79%
RoHS
MODEL
VBT1-S3.3-S3.3-SMT
VBT1-S3.3-S5-SMT
VBT1-S5-S3.3-SMT
VBT1-S5-S5-SMT
VBT1-S5-S9-SMT
VBT1-S5-S12-SMT
VBT1-S5-S15-SMT
VBT1-S5-S24-SMT
VBT1-S12-S3.3-SMT
VBT1-S12-S5-SMT
VBT1-S12-S9-SMT
VBT1-S12-S12-SMT
VBT1-S12-S15-SMT
VBT1-S12-S24-SMT
VBT1-S15-S5-SMT
VBT1-S15-S15-SMT
VBT1-S24-S5-SMT
3.3
3.3
5
5
5
5
5
5
input
voltage
typ
(Vdc)
range
(Vdc)
output
voltage
(Vdc)
N
U
output
current
output
power
max
(W)
min
(mA)
max
(mA)
3.0~3.63
3.0~3.63
4.5~5.5
4.5~5.5
4.5~5.5
4.5~5.5
4.5~5.5
4.5~5.5
3.3
5
5
9
3.3
30
303
TI
30
20
12
9
7
4
30
20
12
9
7
4
20
7
30
20
11
8
7
4
303
200
111
84
67
42
303
200
111
84
67
42
200
67
300
200
110
83
67
42
12
15
24
5
9
3.3
12
15
24
5
15
3.3
5
9
12
15
24
Output Voltage
cui.com
Packaging Style
20
200
O
N
12
10.8~13.2
12
12
12
10.8~13.2
10.8~13.2
10.8~13.2
12
12
15
15
24
10.8~13.2
10.8~13.2
13.5~16.5
13.5~16.5
21.6~26.4
21.6~26.4
21.6~26.4
21.6~26.4
21.6~26.4
21.6~26.4
24
24
24
24
24
Input Voltage
IS
C
VBT1-S24-S3.3-SMT
VBT1-S24-S9-SMT
VBT1-S24-S12-SMT
VBT1-S24-S15-SMT
VBT1-S24-S24-SMT
Notes:
1. ripple and noise are measured at 20 MHz BW
D
PART NUMBER KEY
VBT1 - SXX - SXX -SMT -
X
Base Number
Package Options
"blank" = standard
TR = Tape & Reel
ED
ripple
and noise
1
max
(mVp-p)
FEATURES
efficiency
typ
(%)
1
75
73
74
72
77
76
79
78
78
75
69
73
73
74
79
74
79
69
70
72
75
76
77
1
1
1
1
1
1
1
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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CUI Inc
│
SERIES:
VBT1-SMT
│
DESCRIPTION:
DC-DC CONVERTER
date
05/25/2014
│
page
2 of 5
INPUT
parameter
conditions/description
3.3 V model
5 V model
12 V model
15 V model
24 V model
min
3.0
4.5
10.8
13.5
21.6
typ
3.3
5
12
15
24
max
3.63
5.5
13.2
16.5
26.4
units
Vdc
Vdc
Vdc
Vdc
Vdc
OUTPUT
parameter
line regulation
conditions/description
for Vin change of 1%, 3.3 V model
for Vin change of 1%, all other models
measured from 10% load to full load
3.3 V model
5 V model
9 V model
12 V model
15 V model
24 V model
see derating curves
100% load, 5 and 12 V input
100% load, 24 V input
100% load, all other models
min
load regulation
voltage accuracy
switching frequency
temperature coefficient
N
U
100
500
100
±0.03
min
typ
min
1,000
1,000
3,500,000
typ
min
-40
-55
25
typ
TI
cui.com
PROTECTIONS
parameter
short circuit protection
conditions/description
parameter
isolation voltage
isolation resistance
safety approvals
1
MTBF
RoHS compliant
Notes:
O
N
conditions/description
for 1 minute at 1 mA max.
at 500 Vdc
UL 60950-1 (E222736)
yes
conditions/description
non-condensing
at full load
see reflow soldering profile
SAFETY AND COMPLIANCE
IS
C
1. VBT1-S3.3-S9/12/15/24, VBT1-S5-S3.3 and 24, VBT1-S12-S3.3 and S24, VBT1-S15 (all), and VBT1-S24 (all) models UL 60950-1 pending
ENVIRONMENTAL
parameter
operating temperature
storage temperature
storage humidity
temperature rise
reflow soldering
D
ED
typ
max
1.5
1.2
20
15
10
10
10
10
units
%
%
15
12.8
8.3
6.8
6.3
6.0
%
%
%
%
%
%
500
kHz
kHz
kHz
%/°C
max
1
units
s
max
units
Vdc
MΩ
hours
max
85
125
95
245
units
°C
°C
%
°C
°C
operating input voltage
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│
SERIES:
VBT1-SMT
│
DESCRIPTION:
DC-DC CONVERTER
date
05/25/2014
│
page
3 of 5
SOLDERING
25 0
24 5
21 7
20 0
Peak .Temp 245
˚C
( Max.)
15 0
10 0
50
0
1. output power vs. ambient temperature
100
80
60
40
20
N
U
+10%
+5%
DERATING CURVES
Tim e (se c.)
2. output voltage vs. output current
Output Voltate (%)
Nominal
Voltage
Load (%)
Ambient Temperature (°C)
TI
min
6.00 [0.236]
-40
-20
0
20
40
60
85
105 120
10%
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
plastic (UL94-V0)
12.70 x 11.20 x 6.25 (0.500 x 0.441 x 0.246 inch)
O
N
6.25 [0.246]
(Side View)
0.25 [0.010]
0.60 [0.024]
12.70 [0.500]
2.54 [0.100]
10.10 [0.398]
MECHANICAL DRAWING
units: mm [inches]
tolerance: ±0.15 [±0.006]
pin section tolerance: ±0.10 mm [±0.004]
IS
C
8
7
6
5
1
6
3
5
11.20 [0.441]
4
2.54 [0.100]
2
3
4
8
7
7.50 [0.295]
(Top View)
2
1
1.00 [0.039]
PIN CONNECTIONS
A
D
PIN
1
2
4
0.25 [0.010]
8.50 [0.335]
A
0.25 [0.010]
5
3,6,7
8
1.35 [0.053]
5
°
max
cui.com
ED
+2.5%
-2.5%
-7.5%
50%
100%
Tem peratur e (
˚C
)
60 Sec Max
( >217
˚C
)
Output Current (%)
typ
max
units
mm
1.41
g
2.54 [0.100]
2.10 [0.083]
FUNCTION
GND
+Vin
0V
+Vo
NC
NC
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VBT1-SMT
│
DESCRIPTION:
DC-DC CONVERTER
date
05/25/2014
│
page
4 of 5
APPLICATION NOTES
1.
Requirement on Output Load
In order to ensure the product operates efficiently and reliably, make sure the specified range of input voltage is not exceeded and the
minimum output load is not less than 10% load. If the actual load is less than the specified minimum load, the output ripple may
increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please add an
appropriate resistor as extra loading.
Overload Protection
Under normal operating conditions, the output circuit of these products has no protection against over-current and short-circuits. The
simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit.
Filtering
In some circuits which are sensitive to noise and ripple, a filtering capacitor may be added to the DC/DC output end and input end to
reduce the noise and ripple. However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a
startup problem might arise. For every channel of output, provided the safe and reliable operation is ensured, the greatest
capacitance of its filter capacitor sees the external capacitor table. To get an extremely low ripple, an “LC” filtering network may be
connected to the input and output ends of the DC/DC converter, which may produce a more significant filtering effect. It should also
be noted that the inductance and the frequency of the “LC” filtering network should be staggered with the DC/DC frequency to avoid
mutual interference (Figure 1).
Figure 1
Vin
GND
Cin
2.
3.
DC DC
4.
Output Voltage Regulation and Over-voltage Protection Circuit
The simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat
protection that is connected to the input or output end in series (Figure 2).
REG
O
N
Figure 2
GND
Vin
(Vdc)
3.3/5
12
15
24
--
Vin
5.
External Capacitor Table
It is not recommended to connect any external capacitor in the application field with less than 0.5 W output.
Cin
(µF)
4.7
2.2
2.2
0.47
--
Vout
(Vdc)
3.3/5
9
12
15
24
Cout
(µF)
10
4.7
2.2
1
0.47
D
IS
C
Note:
Table 1
1. All specifications are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
TI
REG
DC DC
0V
cui.com
N
U
+Vo
Cout
0V
+Vo
ED
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VBT1-SMT
│
DESCRIPTION:
DC-DC CONVERTER
date
05/25/2014
│
page
5 of 5
REVISION HISTORY
rev.
1.0
1.01
1.02
1.03
1.04
1.05
description
initial release
new template applied
V-Infinity branding removed
added TR package option
discontinued alternate pin configuration, "X", option
reflow solder profile changed
date
The revision history provided is for informational purposes only and is believed to be accurate.
D
IS
C
O
N
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.
TI
N
U
ED
04/11/2012
09/05/2012
11/01/2012
07/09/2013
05/25/2014
01/14/2011
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