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03/21/2014
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SERIES:
V78-1500
│
DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
FEATURES
• 1.5 A current output
• extremely high efficiency up to 97%
• no heat sink required
• pin compatible to LM78XX linear regulators
• available in straight and right angle SIP packages
• low ripple and noise
• short circuit protection, thermal shutdown
• wide temperature (-40~85°C)
MODEL
typ
(Vdc)
input
voltage
range
(Vdc)
output
voltage
(Vdc)
output
current
max
(mA)
ripple
and noise
1
max
(mVp-p)
efficiency
Vin max
(%)
V7802-1500*
V7803-1500
V7805-1500
V7806-1500
Notes:
12
12
12
12
4.75~18
4.75~18
6.5~18
8~18
2.5
3.3
5
6.5
1,500
1,500
1,500
1,500
45
45
45
45
85
88
91
93
1. ripple and noise are measured at 20 MHz BW
*. Discontinued
PART NUMBER KEY
V78
XX
- 1500
X
Base Number
Output Voltage
Output Current
"blank" = straight pins
R = 90° pins
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CUI Inc
│
SERIES:
V78-1500
│
DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
date
03/21/2014
│
page
2 of 6
INPUT
parameter
operating input voltage
conditions/description
2.5 and 3.3 V outputs
5 V output
6.5 V output
min
4.75
6.5
8
typ
12
12
12
max
18
18
18
units
Vdc
Vdc
Vdc
OUTPUT
parameter
line regulation
load regulation
voltage accuracy
switching frequency
temperature coefficient
conditions/description
Vin = min ~ max, at full load
measured from 10% load to full load
100% load
100% load, input voltage range
300
min
typ
±0.5
±0.5
±2
340
±0.02
max
±0.75
±1.0
±3
380
units
%
%
%
kHz
%/°C
PROTECTIONS
parameter
short circuit protection
thermal shutdown
conditions/description
continuous, automatic recovery
150
°C
min
typ
max
units
SAFETY AND COMPLIANCE
parameter
EMI/EMC
MTBF
RoHS
2011/65/EU
conditions/description
EN 55022 class B, EN 61000-4-2 class A
2,000,000
hours
min
typ
max
units
ENVIRONMENTAL
parameter
operating temperature
storage temperature
case temperature
storage humidity
temperature rise
lead temperature
non-condensing
at full load
1.5 mm from case for 10 seconds
25
300
conditions/description
min
-40
-55
typ
max
85
125
100
95
units
°C
°C
°C
%
°C
°C
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SERIES:
V78-1500
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DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
date
03/21/2014
│
page
3 of 6
DERATING CURVES
1. output power vs. ambient temperature
100
Load (%)
80
60
40
20
-40
-20
0
20
40
60 71
85
100
120
Ambient Temperature (°C)
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
0.689 x 0.354 x 0.453 (11.50 x 9.00 x 17.50 mm)
plastic (UL94-V0)
4.0
g
min
typ
max
units
inch
MECHANICAL DRAWING
units: mm [inches]
tolerance: ±0.25 [±0.010]
pin section tolerance: ±0.10 mm [±0.004]
V78XX-1500
11.50[0.453]
9.00 [0.354]
V78XX-1500R
11.50[0.453]
9.00 [0.354]
17.50 [0.689]
0.50 [0.020]
17.50 [0.689]
0.50 [0.020]
4.10[0.161]
4.10 [0.161]
1.50
[0.059]
5.08 [0.200]
5.08[0.200]
2.15
[0.085]
5.08 [0.200]
5.08 [0.200]
(Bottom View)
1.00 [0.039]
1.35 [0.053]
(Bottom View)
2.15 [0.085]
2.15
[0.085]
1 2
3
0.30 [0.012]
2.54 [0.100]
1 2
3
1
2
3
1
2
3
0.50 [0.020]
2.54 [0.100]
1.00 [0.039]
PIN CONNECTIONS
PIN
1
2
3
FUNCTION
+Vin
GND
+Vo
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SERIES:
V78-1500
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DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
date
03/21/2014
│
page
4 of 6
EXTERNAL CAPACITOR TABLE
Part Number
V7802-1500
V7803-1500
V7805-1500
V7806-1500
C1 (Ceramic capacitor)
10μF/25V
10μF/25V
10μF/25V
10μF/25V
C2 (Ceramic capacitor)
22μF/6.3V
22μF/6.3V
22μF/16V
22μF/16V
TYPICAL APPLICATION CIRCUIT
Positive Output
APPLICATION EXAMPLE
+Vin
1
V78XX-1500(R)
3
C3
GND
2
C4
GND
C1
1
V78XX-1500(R)
+Vout
Vin
1
V78XX-1500(R)
2
3
+Vout
C1
C2
3
GND
GND
2
C2
-Vout
Negative Output
GND
C1
GND
Note:
+Vin
1
V78XX-1500(R)
2
3
C2
-Vout
1. C1 and C2 are required and should be fitted close to the converter
pins.
2. The capacitance of C1and C2 sees external capacitor table, it can
be increased properly if required, and tantalum or low ESR
electrolytic capacitors may also suffice.
3. No parallel connection or plug and play.
INPUT FILTER CIRCUIT
1 0 u H-4 7 u H
Vin
10uF
10uF
Vin
Vo
Vout
GND
GND
GND
OUTPUT FILTER CIRCUIT
1 0 u H-4 7 u H
Vin
10uF
Vin
Vo
10uF
22uF
R
L
GND
GND
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SERIES:
V78-1500
│
DESCRIPTION:
NON-ISOLATED SWITCHING REGULATOR
date
03/21/2014
│
page
5 of 6
EMC RECOMMENDED CIRCUIT
Vin
330 uF
1 mH
Vin
2.2 uF
1u F
Vo
Vout
GND
GND
1mH
GND
TEST CONFIGURATION
Efficiency and Output Voltage Ripple Test
Vin
25. 4mm
25.4mm
12.7mm
1
C1
D C /D C
C onverter
2
3
C2
Copper strip
1 F
10 F
+Vout
2.54 mm
2.54 mm
Ceramic Tantalum
Scope
GND
Copper stri p
Start-up and Load Transient Response Test
Vin
50.8 m m
1
C1
D C /D C
C onverter
2
3
C2
Copper strip
+Vou t
Scope
GND
Copper strip
EFFICIENCY AND RIPPLE CURVES
Efficiency
Efficiency VS. Input voltage
37
32
Ripple
Ripple VS. Load(Vin=nominal)
E ffic ie n c y ( % )
R ipple(m V )
Load
V7802-1500
V7803-1500
V7805-1500
V7806-1500
V7802-1500
V7803-1500
V7805-1500
V7806-1500
V7802-1500
V7803-1500
V7805-1500
V7806-1500
27
22
17
12
7
2
150 300 450 600 750 900 1050 1200 1350 1500
Input voltage(V)
Load(mA)
Efficiency VS.Load(Vin=nominal)
100
90
80
70
60
50
150 300 450 600 750 900 1050 1200 1350 1500
V7803-1500
V7805-1500
V7806-1500
Ripple VS.Input voltage(full load)
45
40
35
30
25
20
15
10
5
0
4.75 5
6
6.5 7.2
8
9
10 12 15 18 20
Input voltage(V)
E ffic ie n c y ( % )
Load(mA)
cui.com
R ip p le ( m V )
V7802-1500
Load
