All specifications measured at TA=25°C, humidity <75%, nominal input voltage and rated output load unless otherwise specified.
Unbalanced load: ±5%
OUTPUT
parameter
output power
voltage accuracy
output ripple
output noise
line regulation
load regulation
see tolerance envelope graph
@ 20MHz Bandwidth
@ 20MHz Bandwidth
for Vin change of 1%(3.3V output)
for Vin change of 1%
10% to 100% full load
3.3V output
5V output
9V output
12V output
15V output
100% full load
100% load, nominal input(24V input)
100% load, nominal input(5V, 12V)
1.
Test ripple and noise by “parallel cable” method.
conditions/description
min
nom
max
0.25
units
W
mVpp
mVpp
%
%
%
%
%
%
%
%/°C
KHz
KHz
50
75
75
150
±1.5
±1.2
15
10
6.5
6.0
6.0
700
150
temperature coefficient
switching frequency
20
15
15
15
15
0.03
notes:
*V-Infinity reserves the right to make changes to its products or to discontinue any product or service without notice, and to advise customers to verify the most up-to-
date product information before placing orders. V-Infinity assumes no liability or responsibility for customer’s applications using V-Infinity products other than repair
or replacing (at V-I’s option) V-Infinity products not meeting V-I’s published specifications. Nothing will be covered outside of standard product warranty.
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2382
page
date
2 of 3
02/2008
PART NUMBER:
VAT0.25-SMT Series
DESCRIPTION:
dc-dc converter
GENERAL SPECIFICATIONS
parameter
output short circuit protection
temperature rise at full load
cooling
operating temp. range
storage temp. range
reflow soldering temp.
storage humidity range
case material
MTBF
conditions/description
1 second max.
15°C typ., 25°C max.
free air convection
-40°C ~ +85°C
-55°C ~ +125°C
260°C (1.5mm from case for 10 seconds)
≤95%
plastic (UL94-V0)
>3,500,000 hours
ISOLATION SPECIFICATIONS
parameter
isolation voltage
isolation resistance
conditions/description
flash tested for 1 minute
test at 500 V dc
min
1000
1000
nom
max
units
V dc
MΩ
OUTLINE DIMENSIONS & RECOMMENDED LAYOUT PATTERN
6.76
(0.2 7)
(0.17)
0.50
4.25
A
(0.0 2)
(0.26)
(0.25 )
6.50
6.25
(Side View)
1.35MAX
(0.06)
5.00
"
0.25
(0.0 1)
1.85MAX
(0.07)
7.15
(0.2 8)
(0.01)
0.3
Pin
15.24
(0.6 )
10.16
(0.4)
Function
-Vin
+Vin
NC
Com
-Vout
NC
+Vout
NC
NC
NC
10 9 8
7 6
(Top View)
2.54
0.1
0.6 0.05
(0.02
0.00 2)
(0.1 0.004)
1 2
3
4
5
1
2
3
4
5
6
7
8
9
10
11.2 MAX
(0.44)
Note: All Pins on a 2.54mm(0.1) pitch; All Pin Widths are 0.60 mm(0.02);
Tolerances:±0.15mm(0.006); Unit: mm(inch)
TYPICAL CHARACTERISTICS
Tolerance Envelope Graph
Output Power (%)
+10%
+5%
Nominal
Voltage
Output Voltage
120
(0.30)
7.50
Temperature Derating Graph
100
80
60
40
20
0
-40
0
40
80
120
Typica
l
Load L
ine
+2.5%
-2.5%
-7.5%
Safe Operating Area
10%
50%
100%
Output Current (%)
Ambient Temperature(°C)
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2382
page
date
3 of 3
02/2008
PART NUMBER:
VAT0.25-SMT Series
DESCRIPTION:
dc-dc converter
Application Notes:
- To ensure this module can operate efficiently and
reliably during operation, the minimum output load
should not be less than 10% of the full load. This
product should never be operated under no load
conditions. If the actual output power is very low you
should increase the load by connecting a resistor
with the proper resistance at the output end in
parallel.
No parallel connection or plug and play.
- Overload Protection
Under normal operating conditions, the output circuit
of these products has no protection against overload.
The simplest method is to connect a self-recovery
fuse in series at the input end or add a circuit
breaker to the circuit.
- 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).
Figure 2
+Vin
-Vin
REG
+Vout
DC DC
Com
-Vout
- Recommended Circuit
If you want to further decrease the input/output
ripple, an “LC” filtering network may be connected to
the input and output ends of the dc-dc converter, see
(Figure 1).
+Vin
REG
+Vout
Com
DC DC
-Vin
REG
-Vout
Figure 1
L
L
+Vin
C
+Vout
C
DC DC
-Vin
L
Com
C
Reflow Profile
Peak Temperature
260°C for 10 Sec. Max
220°C
200
-Vout
250
It should also be noted that the inductance and
the frequency of the “LC” filtering network should
mutual interference. However, the capacitance of
the output filter capacitor must be proper. If the
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