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date 08/27/2014
page 1 of 7
SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 08/27/2014
page 1 of 7
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
PART NUMBER KEY
MODEL input
voltage
output
voltage1
output
current
ripple
and noise2
efciency
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 Conguration section.
V78 XX - 1000 X
Output Voltage Output Current
Base Number "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
OUTPUT
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 280 330 450 kHz
temperature coefcient ±0.02 %/°C
load capacitance 1,000 μF
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection continuous, automatic recovery
thermal shutdown 150 °C
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
MTBF as per MIL-HDBK-217F, 25°C 2,000,000 hours
RoHS compliant 2011/65/EU
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curve -40 85 °C
storage temperature -55 125 °C
case temperature 100 °C
storage humidity non-condensing 95 %
lead temperature 1.5 mm from case for 10 seconds 300 °C
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CUI Inc │ SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 08/27/2014 │ page 3 of 7
MECHANICAL
parameter conditions/description min typ max units
dimensions 11.50 x 9.00 x 17.50 (0.689 x 0.354 x 0.453 inch) mm
case material plastic (UL94-V0)
weight 3.7 g
V78XX-1000 V78XX-1000R
(BottomView)
0.30
[0.012]
0.50 [0.020]
4.10 [0.161]
17.50[0.689]
0.50 [0.020]
2.15
[0.085]
5.08 [0.200]
12 3
9.00 [0.354]
2.15
[0.085]
4.10[0.161]
9.00 [0.354]11.50[0.453]
17.50 [0.689]
0.50 [0.020]
5.08 [0.200]
11.50[0.453]
1.50
[0.059]
123
(BottomView)
2.54 [0.100]
1.00 [0.039]
12 3
2.54[0.100]
2.15 [0.085]
5.08 [0.200]
1.00 [0.039]
5.08 [0.200]
1.35 [0.053]
MECHANICAL DRAWING
PIN CONNECTIONS
PIN FUNCTION
1 +Vin
2 GND
3+Vo
units: mm [inches]
tolerance: ±0.25 [0.010]
pin section tolerance: ±0.10 [0.004]
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 02040607185 100 120
DERATING CURVES
1. output power vs. ambient temperature
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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
V78XX-1000(R)
1
2
3
Vin
GND
+Vout
C2
C1
OUTPUT RIPPLE REDUCTION
3
Vin
GND
+Vout
1DC/DC
Converter
C1
22 F
2
C2
Load
L
To reduce output ripple, it is recommended to add a LC filter in output port.
L: Recommended parameter 10 H~47 H.
TYPICAL APPLICATION CIRCUIT
Notes: 1. C1 and C2 are required and should be tted 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.
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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
V7803-1000
V7805-1000
V7812-1000
V7806-1000
V7809-1000
V7815-1000
V7803-1000
V7805-1000
V7812-1000
V7806-1000
V7809-1000
V7815-1000
V7803-1000
V7805-1000
V7812-1000
V7806-1000
V7809-1000
V7815-1000
V7803-1000
V7805-1000
V7812-1000
V7806-1000
V7809-1000
V7815-1000
V7803-1000
V7805-1000
V7812-1000
V7806-1000
V7809-1000
V7815-1000
V7803-1000
V7805-1000
V7812-1000
V7806-1000
V7809-1000
V7815-1000
Efficiency Ripple
Efficiency VS Vin(Full Load)
60
70
80
90
100
4.75 8121620242832Vin(V)
Efficiency(%)
V7803-1000
V7805-1000
V7812-1000
V7806-1000
V7809-1000
V7815-1000
Ripple VS Vin( Full Load)
5
10
15
20
25
30
35
40
4.75 8121620242832Vin(V)
Ripple (mV)
Efficiency VS Load(Vin=Vin_min)
65
70
75
80
85
90
95
100
40 80 200400 600800 1000 Load(mA)
Efficiency(%)
Ripple VS Load(Vin=Vin_min)
0
5
10
15
20
40 80 200400 600800 1000 Load(mA)
Ripple(mV)
Efficiency VS Load(Vin=Vin_max)
50
60
70
80
90
100
40 80 200400 600 8001000Load(mA)
Ef
ficiency(%)
Ripple VS Load(Vin=24V)
0
5
10
15
20
25
30
35
40 80 200400 600800 1000 Load(mA)
Ripple(mV)
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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
Scope
Ceramic
3
Vin
GND
+Vout
C2
C1
25.4mm
1
2.54 mm
DC/DC
Converter
2
25.4mm
12.7mm
1F 10 F
Ta ntalum
Copper strip
Copper strip
Load
St
art-up and Load Transient Response Test
3
Vin
GND
+Vout
C2
C1
50.8 mm
1
2.54 mm
DC/DC
Converter
2Scope
Copper strip
Load
Copper strip
Note: All specications measured at 25°C, humidity <75%, nominal input voltage, and full load unless otherwise noted.
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CUI Inc │ SERIES: V78-1000 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 08/27/2014 │ page 7 of 7
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.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 07/13/2010
1.01 V-Innity branding removed 09/04/2012
1.02 updated typical application circuits 09/25/2012
1.03 corrected switching frequency values 04/22/2013
1.04 not recommended for use as an inverter 08/27/2014
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
CUI Inc.:
V7812-1000R V7806-1000R V7805-1000 V7805-1000R V7803-1000 V7803-1000R V7812-1000 V7806-1000
V7809-1000R V7809-1000 V7815-1000 V7815-1000R