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rev. page page date date 1 of 3
02/2008
PART NUMBER: VAT0.25-SMT Series
DESCRIPTION: dc-dc converter
description
Designed to convert fixed voltages into isolated voltages, the VAT0.25-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...
features
*SMT package *internal SMD construction *I/O isolation: 1000 V dc *no heatsink required *no external component required *industry standard pinout *temperature range: -40C~+85C
MODEL
VAT0.25-S5-D3.3-SMT VAT0.25-S5-D5-SMT VAT0.25-S5-D9-SMT VAT0.25-S5-D12-SMT VAT0.25-S5-D15-SMT VAT0.25-S12-D5-SMT VAT0.25-S12-D9-SMT VAT0.25-S12-D12-SMT VAT0.25-S12-D15-SMT VAT0.25-S24-D5-SMT VAT0.25-S24-D9-SMT VAT0.25-S24-D12-SMT VAT0.25-S24-D15-SMT
notes: 1. 2.
input voltage nominal range. (V dc) (V dc)
output voltage (V dc)
output current max. min. (mA) (mA)
efficiency typ. (%)
5 5 5 5 5 12 12 12 12 24 24 24 24
4.5~5.5 4.5~5.5 4.5~5.5 4.5~5.5 4.5~5.5 10.8~13.2 10.8~13.2 10.8~13.2 10.8~13.2 21.6~26.4 21.6~26.4 21.6~26.4 21.6~26.4
3.3 5 9 12 15 5 9 12 15 5 9 12 15
38 25 14 11 9 25 14 11 9 25 14 11 9
4 3 2 2 1 3 2 2 1 3 2 2 1
62 64 65 67 66 65 64 63 64 61 62 63 65
All specifications measured at TA=25C, 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 conditions/description 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.
min
nom
max 0.25 75 150 1.5 1.2 20 15 15 15 15 0.03
units W mVpp mVpp % % % % % % % %/C KHz KHz
50 75
15 10 6.5 6.0 6.0 700 150
temperature coefficient switching frequency
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-todate 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 112th 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. 15C typ., 25C max. free air convection -40C ~ +85C -55C ~ +125C 260C (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 M
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
76
(Top View)
2.54
0.1
0.6 0.05
(0.02 0.00 2)
(0.1 0.004)
12
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 112th 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 260C for 10 Sec. Max 220C 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 capacitance is too large, a startup problem might arise. It is not recommended to connect any external capacitor in the application field . Temperature (C) be staggered with the dc-dc frequency to avoid
90 Sec. max (>220C)
150
100
50 0 Time (Seconds)
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382

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