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date
08/27/2014
page
1 of 7
SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
FEATURES
•
•
•
•
•
•
•
•
1 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)
RoHS
MODEL
input
voltage
output
voltage1
output
current
ripple
and noise2
efficiency
typ
(Vdc)
range
(Vdc)
(Vdc)
max
(mA)
max
(mVp-p)
Vin min
(%)
Vin max
(%)
V7803-1000
24
4.75~28
3.3
1,000
35
90
83
V7805-1000
24
6.5~32
5
1,000
35
93
88
V7806-1000
24
9~32
6.5
1,000
35
94
90
V7809-1000
24
12~32
9
1,000
35
95
92
V7812-1000
24
16~32
12
1,000
35
96
94
V7815-1000
24
20~32
15
1,000
35
97
94
Notes:
1. Not recommended for use in a negative output mode.
2. Ripple and noise are measured at 20 MHz BW, see Test Configuration section.
PART NUMBER KEY
V78 XX - 1000 X
Base Number
Output Voltage
Output Current
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"blank" = straight pins
R = 90° pins
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CUI Inc │ SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 08/27/2014 │ page 2 of 7
INPUT
parameter
conditions/description
min
typ
max
units
operating input voltage
3.3 Vdc model
5 Vdc model
6.5 Vdc model
9 Vdc model
12 Vdc model
15 Vdc model
4.75
6.5
9.0
12
16
20
24
24
24
24
24
24
28
32
32
32
32
32
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
parameter
conditions/description
min
typ
max
units
line regulation
Vin = min ~ max, at full load
±0.2
±0.4
%
load regulation
measured from 10% load to full load
±0.4
±0.6
%
voltage accuracy
100% load
±2
±3
%
switching frequency
100% load, input voltage range
330
450
OUTPUT
280
temperature coefficient
±0.02
load capacitance
kHz
%/°C
1,000
μF
max
units
PROTECTIONS
parameter
conditions/description
min
short circuit protection
continuous, automatic recovery
thermal shutdown
typ
150
°C
SAFETY AND COMPLIANCE
parameter
conditions/description
MTBF
as per MIL-HDBK-217F, 25°C
RoHS compliant
2011/65/EU
min
typ
max
2,000,000
units
hours
ENVIRONMENTAL
parameter
conditions/description
min
operating temperature
see derating curve
storage temperature
case temperature
storage humidity
non-condensing
lead temperature
1.5 mm from case for 10 seconds
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typ
max
units
-40
85
°C
-55
125
°C
100
°C
95
%
300
°C
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CUI Inc │ SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 08/27/2014 │ page 3 of 7
DERATING CURVES
1. output power vs. ambient temperature
Load (%)
100
80
60
40
20
-40
-20
0
20
40
60
71
85
100
120
Ambient Temperature (°C)
MECHANICAL
parameter
conditions/description
dimensions
11.50 x 9.00 x 17.50 (0.689 x 0.354 x 0.453 inch)
min
case material
plastic (UL94-V0)
typ
max
units
mm
weight
3.7
g
MECHANICAL DRAWING
units: mm [inches]
tolerance: ±0.25 [0.010]
pin section tolerance: ±0.10 [0.004]
V78XX-1000
V78XX-1000R
11.50[0.453]
17.50 [0.689]
0.50 [0.020]
17.50 [0.689]
1.50
[0.059]
4.10 [0.161]
(Bottom View)
1.00 [0.039]
2
3
0.30
[0.012]
0.50 [0.020]
1 2
3
1
2.54 [0.100]
1
2.15 [0.085]
(Bottom View)
2.15
[0.085]
4.10[0.161]
2.15
[0.085]
5.08 [0.200]
5.08 [0.200]
5.08 [0.200]
9.00 [0.354]
2
5.08 [0.200]
9.00 [0.354]
0.50 [0.020]
11.50[0.453]
3
2.54 [0.100]
1.00 [0.039]
PIN CONNECTIONS
PIN
FUNCTION
1
+Vin
2
GND
3
+Vo
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1.35 [0.053]
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CUI Inc │ SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 08/27/2014 │ page 4 of 7
EXTERNAL CAPACITOR TABLE
Part Number
C12 (Ceramic capacitor)
C2 (Ceramic capacitor)
V7803-1000(R)
10μF/50V
22μF/6.3V
V7805-1000(R)
10μF/50V
22μF/16V
V7806-1000(R)
10μF/50V
10μF/16V
V7809-1000(R)
10μF/50V
10μF/16V
V7812-1000(R)
10μF/50V
10μF/25V
V7815-1000(R)
10μF/50V
10μF/25V
TYPICAL APPLICATION CIRCUIT
1
Vin
V78XX-1000(R)
3
+Vout
2
C1
C2
GND
Notes:
1. C1 and C2 are required and should be fitted close to the converter pins.
2. If the input voltage is greater than 26 Vdc (3.3 Vdc output model) or greater than 28 Vdc (all other models), it is required to have C1 be ≥ 22 µF electrolytic capacitor to
protect the part from voltage spikes.
OUTPUT RIPPLE REDUCTION
1
C1
DC/DC
3
Converter
2
L
+Vout
C2
22 F
GND
To reduce output ripple, it is recommended to add a LC filter in output port.
L: Recommended parameter 10 H ~ 47 H.
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Load
Vin
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CUI Inc │ SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 08/27/2014 │ page 5 of 7
EFFICIENCY AND RIPPLE CURVES
Efficiency
Ripple
Ripple (mV)
Efficiency(%)
40
100
35
90
80
V7803-1000
30
V7805-1000
25
V7812-1000
V7806-1000
12
16
20
24
28
32
V7809-1000
V7815-1000
10
60
8
V7812-1000
V7806-1000
15
V7815-1000
4.75
V7805-1000
20
V7809-1000
70
V7803-1000
5
Vin(V)
4.75
Efficiency VS Vin(Full Load)
8
12
16
20
24
28
32 Vin (V)
Ripple VS Vin ( Full Load)
Efficiency(%)
Ripple(mV)
20
100
95
15
90
V7803-1000
V7803-1000
85
V7805-1000
80
V7812-1000
V7806-1000
75
V7809-1000
10
V7805-1000
5
V7809-1000
V7812-1000
V7806-1000
V7815-1000
V7815-1000
70
0
65
40
80
200
400
600
800 1000 Load(mA)
Efficiency VS Load(Vin=Vin_min)
40
Efficiency(%)
80
200
400
600
800
1000 Load(mA)
Ripple VS Load(Vin=Vin_min)
Ripple(mV)
35
100
30
90
25
80
V7803-1000
70
V7812-1000
V7806-1000
60
V7809-1000
80
15
V7812-1000
V7806-1000
10
V7809-1000
V7815-1000
5
V7815-1000
40
V7805-1000
20
V7805-1000
50
V7803-1000
0
200
400
600
800 1000 Load(mA)
Efficiency VS Load(Vin=Vin_max)
40
80
200
400
600
800
Ripple VS Load(Vin=24V)
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1000 Load(mA)
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CUI Inc │ SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 08/27/2014 │ page 6 of 7
TEST CONFIGURATION
Efficiency and Output Voltage Ripple Test
25.4mm
25.4mm
12.7mm
2
C1
Copper strip
C2
1 F
+Vout
10 F
Ceramic Tantalum
Scope
GND
Load
3
Load
DC/DC
Converter
2.54 mm
1
2.54 mm
Vin
Copper strip
Start-up and Load Transient Response Test
Vin
1
C1
DC/DC
Converter
50.8 mm
3
2
Copper strip
Scope
C2
GND
Copper strip
Note:
All specifications measured at 25°C, humidity <75%, nominal input voltage, and full load unless otherwise noted.
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+Vout
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CUI Inc │ SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 08/27/2014 │ page 7 of 7
REVISION HISTORY
rev.
description
date
1.0
initial release
07/13/2010
1.01
V-Infinity branding removed
09/04/2012
1.02
updated typical application circuits
09/25/2012
1.03
corrected switching frequency values
04/22/2013
not recommended for use as an inverter
08/27/2014
1.04
The revision history provided is for informational purposes only and is believed to be accurate.
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20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
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[email protected]
CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is
assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical
component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to
affect its safety or effectiveness.
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