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date
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01/26/2016
1 of 8
SERIES:
V78-500-SMT
│
DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
FEATURES
• 500 mA current output
• high efficiency up to 96%
• no heat sink required
•
•
•
•
•
SMT package
remote on/off control
low ripple and noise
short circuit protection, thermal shutdown
wide temperature (-40°C~+85°C)
RoHS
MODEL
typ
(Vdc)
input
voltage
range
(Vdc)
output
voltage
(Vdc)
output
current
(mA)
output
power
max
(W)
ripple and
noise
1
max
(mVp-p)
efficiency
Vin min
(%)
Vin max
(%)
V7803-500-SMT
V7805-500-SMT
V7812-500-SMT
Notes:
2
12
12
24
24
4.5 ~ 28
6 ~ 28
14 ~ 28
17 ~ 28
3.3
5
12
15
500
500
500
500
1.65
2.5
6
7.5
25
25
25
25
90
94
95
96
75
81
90
92
V7815-500-SMT
2
1. ripple & noise are measured at 20 MHz BW with 1 µF ceramic cap and 10 µF electrolytic capacitors on the output
2. must operate with a minimum of 5% loading
PART NUMBER KEY
V78
XX
-
XXX
-SMT-
X
Base Number
Output Voltage
Output Current
Package Options
"blank" = standard
TR = Tape & Reel
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For more information, please visit the
product page.
CUI Inc
│
SERIES:
V78-500-SMT
│
DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
date
01/26/2016
│
page
2 of 8
INPUT
parameter
input voltage
remote on/off shutdown
threshold voltage
on/off control current
shutdown input current
on:
off:
open or 1.5<Vc≤6V
GND or 0V<Vc<1V
conditions/description
3.3 Vdc output
5 Vdc output
12 Vdc output
15Vdc output
min
4.5
6
14
17
1.1
typ
12
12
24
24
1.25
2
15
30
max
28
28
28
28
1.4
units
Vdc
Vdc
Vdc
Vdc
Vdc
µA
µA
OUTPUT
parameter
max capacitive load
line regulation
load regulation
voltage accuracy
adjustability
1
temperature coefficient
Notes:
1. output voltage adjustment must meet Vin-Vo > 2V requirement
conditions/description
measured from low line to high line at 100% load
measured from 10% to full load at nominal input
measured from low line to high line at 100% load
see application notes
min
typ
±0.2
±0.3
±2
max
1000
±0.5
±0.75
±3
±0.02
units
µF
%
%
%
%/°C
PROTECTIONS
parameter
short circuit protection
thermal shutdown
current limit
conditions/description
hiccup, continuous, automatic recovery
internal IC junction
160
1.8
°C
A
min
typ
max
units
SAFETY AND COMPLIANCE
parameter
RoHS
MTBF
conditions/description
2011/65/EU
as per MIL-HDBK-217F, 25°C
2,000,000
hours
min
typ
max
units
ENVIRONMENTAL
parameter
case operating temperature
operating temperature
storage temperature
storage humidity
hand soldering
reflow soldering
for 10 seconds
refer to IPC/JEDEC J-STD-020D.1
see derating curve
-40
-55
conditions/description
min
typ
max
100
85
125
95
300
240
units
°C
°C
°C
%
°C
°C
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product page.
CUI Inc
│
SERIES:
V78-500-SMT
│
DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
date
01/26/2016
│
page
3 of 8
DERATING CURVES
100
80
60
40
20
Load (%)
-40
-20
0
20
40
60 71
85
100
120
Ambient Temperature (°C)
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
15.24 x 8.30 x 7.25 (0.600 x 0.327 x 0.285 inch)
plastic (UL94-V0)
2.3
g
min
typ
max
units
mm
MECHANICAL DRAWING
units: mm [in]
pin tolerance: ±0.10 mm [±0.004 in]
general tolerance: ±0.25 mm [±0.010 in]
PIN CONNECTIONS
1
5
6
7
9
10
Vin
Vout
Vadj
GND
GND
On/Off
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CUI Inc
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SERIES:
V78-500-SMT
│
DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
date
01/26/2016
│
page
4 of 8
PACKAGING DIMENSIONS
Taping dimension:
∅1.50
[0.059]
15.65 [0.616]
14.70 [0.579]
10.20[0.402]
8.20 [0.323]
10.20 [0.402]
2.00 [0.079]
1.75 [0.069]
11.50 [0.453]
0.50 [0.020]
6.50 [0.256]
12.40 [0.488]
Taping reel dimension:
16.00 [0.630]
∅1.50
[0.059]
7.65 [0.301]
29.40 [1.157]
∅100.00[3.937]
∅330.00
[12.992]
5.60 [0.220]
Note:
Unit :mm[inch]
General tolerances:
0.50mm[ 0.020inch]
∅
13.00 [0.512]
∅
21.50 [0.846]
L=530mm[20.866inch] Tube Quantity: 33pcs
L=220mm[8.661inch] Tube Quantity: 13pcs
Note:
Unit :mm[inch]
General tolerances: 0.50mm[ 0.020inch]
Devices per reel quantity:500pcs
TYPICAL APPLICATION CIRCUIT
V78XX-500-SMT
1.
2.
3.
4.
C1, C2: Use ceramic capacitors (see table below); C3: For best performance, use a 100 μF or more capacitor.
C1, C2, & C3 are required and should be placed close to the pins of the converter, with shortest possible leads.
R1 is used when trimming down. R2 is used when trimming up.
No parallel connection or plug and play.
Part Number
V7803-500-SMT
V7805-500-SMT
V7812-500-SMT
V7815-500-SMT
C1
(ceramic capacitor)
10uF/50V
10uF/50V
10uF/50V
10uF/50V
C2
(ceramic capacitor)
22uF/16V
22uF/16V
10uF/25V
10uF/25V
cui.com
For more information, please visit the
product page.
CUI Inc
│
SERIES:
V78-500-SMT
│
DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
date
01/26/2016
│
page
5 of 8
OUTPUT TRIMMING
Pa rt Na me
V7803-500-SMT
V7805-500-SMT
V7812-500-SMT
V7815-500-SMT
Vo nom
3.3 V
5.0 V
12V
15V
Trim Down
R 1(KΩ )
61 *Vo- 75.1 0
=
3.3-Vo
61*Vo-9 1.52
=
5.0 -Vo
71 *Vo- 287 .02
=
12-Vo
=
6 6*Vo -26 9.37
15-Vo
Trim Up
R 2(K
Ω
)
75.1 0-10 *Vo
=
Vo -3.3
91.5 2-10 *Vo
Vo -5.0
28 7.02- 20*Vo
=
Vo-1 2
=
=
26 9.37- 15*Vo
Vo-1 5
To trim the output of the device input the desired output voltage (Vo) into the proper equation.
R1 trims the output voltage down and R2 trims the voltage up. If not using the trim feature
R1 and R2 are left open. Make sure that the desired output voltage is within the trim range.
TEST CIRCUIT
1) Efficiency and Output Voltage Ripple Test
25.4m m
25.4m m
12.7m m
Vin
1
C1
DC /DC
Co nvert er
7 9
C5
5
C2 C3
Copp er strip
1 F
10 F
+Vout
GND
Cerami c
470pF
Cer amic Ta ntalum
Scope
Copper strip
2) Start-up and Load Transient Response Test
5 0.8 m m
Vin
1
C1
GND
C5
47 0p F
C er am ic
C2 C3
Scope
Cop pe r strip
cui.com
L oa d
7 9
6
2 .54 m m
D C /DC
C onverter
5
Co ppe r strip
+Vout
Load
6
2.54mm
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