CUI VAT2-SMT

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VAT2-SMT Series DC-DC Converter
Rev. 12-2006
Description
Features
Designed to convert fixed voltages into an isolated voltage, the
VAT2-SMT series is well suited for
providing board-mount local supplies in a wide range of applications, including mixed analog/digital circuits, test & measurement
equip., process/machine controls,
datacom/telecom fields, etc...
·Isolated 2 W output
·Temperature range: -40°C~+85°C
·Unregulated
·High efficiency to 85%
·Dual voltage output
·Small footprint
·SMT package style
·Industry standard pinout
·UL94-V0 package
·No heatsink required
·1K VDC isolation
·High power density
·No external component required
The semi-regulated output can be
followed by 3-terminal regulators
to provide output protection, in
addition to output regulation.
Model
Number
VAT2-S5-D5-SMT
VAT2-S5-D9-SMT
VAT2-S5-D12-SMT
VAT2-S12-D5-SMT
VAT2-S12-D9-SMT
VAT2-S12-D12-SMT
VAT2-S12-D15-SMT
Input Voltage
Nominal
Range
5 Vdc
4.5~5.5 Vdc
5 Vdc
4.5~5.5 Vdc
5 Vdc
4.5~5.5 Vdc
12 Vdc
10.8~13.2 Vdc
12 Vdc
10.8~13.2 Vdc
12 Vdc
10.8~13.2 Vdc
12 Vdc
10.8~13.2 Vdc
Output
Voltage
±5 Vdc
±9 Vdc
±12 Vdc
±5 Vdc
±9 Vdc
±12 Vdc
±15 Vdc
Output Current
Max.
Min.
±200 mA
±10 mA
±111 mA
±11 mA
±83 mA
±8 mA
±200 mA
±10 mA
±111 mA
±11 mA
±83 mA
±8 mA
±67 mA
±6 mA
Efficiency
82%
83%
84%
83%
84%
84%
85%
Package
Style
SMT
SMT
SMT
SMT
SMT
SMT
SMT
Output Specifications
Item
Output power
Line Regulation
Load Regulation
Output voltage accuracy
Temperature drift
Output ripple
Switching frequency
Test conditions
For Vin change of 1%
10% to 100% full load (5V output)
10% to 100% full load (9V output)
10% to 100% full load (12V output)
10% to 100% full load (15V output)
See tolerance envelope graph
100% load
20 MHz Bandwidth
Full load, nominal input
Min.
0.2
Typ.
10
6.5
6.0
6.0
100
100
Max.
2
1.2
15
15
15
15
Units
W
%
%
%
%
%
0.03
200
%/°C
mVp-p
KHz
Note:
1. All specifications measured at TA=25°C, humidity <75%, nominal input voltage and rated output load unless
otherwise specified.
V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062
www.v-infinity.com
1-866-372-1258
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VAT2-SMT Series DC-DC Converter
Rev. 12-2006
General Specifications
Short circuit protection
Temperature rise at full load
1 second
25°C Max, 15°C Typ.
Cooling
Free air convection
Operating temperature range
-40°C to +85°C
Storage temperature range
-55°C to +125°C
Soldering temperature
300°C (1.5mm from case for 10 sec.)
Storage humidity range
<95%
Case material
Plastic (UL94-V0)
MTBF
>3,500,000 hrs.
Isolation Specifications
Item
Isolation Voltage
Insulation Resistance
Test Conditions
Tested for 1 min.
Test at 500 Vdc
Min.
1000
1000
Typ.
Max.
Units
Vdc
MΩ
Typical Characteristics
Ambient Temperature (
)
Outline Dimensions &
Recommended Layout Pattern
2.54
14 13 12
10 9 8
PIN
PIN
18.03 12.7
1
2
3
5
6
7
RoHS
5 6 7
1 2 3
1 5.2 4
1 7.7 8
G ND
Vin
NA
NA
0V
+Vo
14 13 12
10 9 8
1 2 3
5 6 7
8
9
10
12
13
14
NA
NA
-Vo
NA
NA
NA
Top View
A
2 .75
6.00 5.75
2 .74
2 .54
0 .2-0 .3
0 .25
Side View
Front View
Note: All Pins on a 2.54mm pitch; all pin diameters are 0.50mm; all dimensions in mm.
V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062
www.v-infinity.com
1-866-372-1258
3/3
VAT2-SMT Series DC-DC Converter
Rev. 12-2006
- Minimum loading
Application Notes:
The converter needs a minimum of 10% loading to
maintain output regulation. Operation under no-load
- Input filtering
To reduce the reflected ripple current and minimize
conditions will not cause immediate damages but
EMI, especially when the converter input is more
may reduce reliability, and cause performance not to
than 2” away from the DC source, it is recommended
meet specifications.
to connect a low ESR electrolytic capacitor between
Vin and Gnd. The values suggested are as shown in
- Regulation
Table 1. If additional filtering is required, the
With a semi-regulated design, the converter’s output
capacitance may be increased, or expanded to an LC
voltage varies with load current and will change
network as shown in Figure 1.
proportionally to the input voltage. If regulated
output is needed, an external regulator can be used
Table 1
as shown in Figure 2.
- Protection
Input Voltage
External Input Capacitance
5V
4.7 µF
over-voltage or output over-load, and may be
12 V
2.2 µF
permanently damaged if exposed to these conditions.
24 V
1.0 µF
The converter has minimal protection against input
An input clamping device can be used for input
voltage limiting. An input fuse or an output fuse
can also be used to protect against over-loading.
- Output filtering
- Dual outputs used as a single output
An output capacitor is needed to meet output ripple
The +Vout and -Vout can be used to obtain a single
requirements as shown in Table 2.
output that is the sum of the two outputs. In this
Output capacitance may be increased for additional
case, the COM pin shouldn’t be used.
filtering, but should not exeed 10µF or expanded to
an LC network as in Figure 1.
- External Regulator
An external 3-terminal regulator can be connected
Table 2
to the output of the converter to achieve full
regulation. Make sure the converter’s output voltage
Vout
External Ouput Capacitance
5V
4.7 µF
9V
2.2 µF
12 V
1.0 µF
15 V
0.47 µF
provides sufficient head room for the regulator. An
additional benefit is that the built-in protection
features in the regulator, such as OCP, OTP, etc, will
protect the converter also. In a complimentory
supply, a negative output regulator must be used to
achieve the negative regulated output.
Vin
+Vout
REG
REG
DC
DC DC
DC
0V
G ND
L
L
Vin
C
DC DC
GND
C
L
-Vout
+Vo
C
0V
-Vo
<Figure 1>
V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062
Vin
REG
REG
DC
DC DC
DC
GND
+Vout
0V
REG
REG
-Vout
<Figure 2>
www.v-infinity.com
1-866-372-1258