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date
04/21/2015
page
1 of 5
SERIES: V78W-500 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
FEATURES
•
•
•
•
•
•
•
•
•
up to 500 mA current output
extremly high efficiency up to 95%
no heatsink required
pin comparable to LM78 linear regulators
available in straight and right angle SIP packages
up to 8:1 ultra wide input
low ripple and noise
short circuit protections
wide temperature (-40°C ~ 85°C)
RoHS
MODEL
input
voltage
output
voltage
range
(Vdc)
(Vdc)
min
(mA)
V7803W-500
9 ~ 72
3.3
V7805W-500
9 ~ 72
V7806W-500
9 ~ 72
V7809W-500
14 ~ 72
V7812W-500
17 ~ 72
V7815W-500
20 ~ 72
V7824W-500
36 ~ 72
3
Notes:
output
current
output
power
ripple and
noise1
efficiency
level2
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
10
500
1.65
60
82
5
10
500
2.5
60
87
6.5
10
500
3.25
60
91
9
10
500
4.5
60
92
12
10
500
6
60
93
15
10
500
7.5
60
94
24
6
300
7.2
60
95
1. 20MHz bandwidth, from 10% to 100% load
2. Measured at Vin min and 100% load
3. V7824W-500 output current is 300 mA (max)
PART NUMBER KEY
V78 XX W - XXX X
Base Number
Output Voltage
Output Current
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blank = standard
R = Right Angle
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CUI Inc │ SERIES: V78W-500 │ DESCRIPTION: DC-DC CONVERTER
date 04/21/2015 │ page 2 of 5
INPUT
parameter
operating input voltage
conditions/description
3, 5, 6.5 V models
9 V model
12 V model
15 V model
24 V model
min
typ
max
units
9
14
17
20
36
48
48
48
48
48
72
72
72
72
72
Vdc
Vdc
Vdc
Vdc
Vdc
min
typ
max
units
OUTPUT
parameter
conditions/description
line regulation
measured from low line to high line
±0.4
±1.0
%
load regulation
measured from 10% to full load
±0.3
±0.6
%
voltage accuracy
at 100% load
switching frequency
100% load
temperature coefficient
-40°C ~ +85°C ambient
quiescent current
Vin = nominal, min. load
tendencies load
at 10% to 100% load
±2
120
±3
%
800
kHz
±0.015
%/°C
1
5
mA
1.0
±100
1.5
mV
ms
100
µF
typ
max
units
0.72
1.2
W
700
1200
mA
typ
max
units
60
°C/W
max capacitance load
PROTECTIONS
parameter
conditions/description
min
short circuit protection
continuous, automatic recovery
short circuit input power
Vin = nominal
thermal shutdown
current limit
160
Vin = nominal
°C
SAFETY AND COMPLIANCE
parameter
conditions/description
min
thermal resistance
EMI/EMC
EN55022, class B (refer to page 4), IEC/EN 61000-4-2 level 4
RoHS compliant
yes
MTBF
25°C (MIL-HDBK-217K)
71°C (MIL-HDBK-217K)
3,500,000
1,500,000
hours
hours
ENVIRONMENTAL
parameter
conditions/description
min
typ
max
units
65
100
°C
-40
85
°C
-55
125
°C
95
%
case operating temperature
operating temperature
power derating above 71°C
storage temperature
storage humidity
non-condensing
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CUI Inc │ SERIES: V78W-500 │ DESCRIPTION: DC-DC CONVERTER
date 04/21/2015 │ page 3 of 5
MECHANICAL
parameter
conditions/description
dimensions
11.5 x 9.0 x 17.5 mm (0.45 x 0.35 x 0.69 inch)
min
case material
Plastic (UL94-V0)
typ
weight
max
units
4
g
MECHANICAL DRAWING
Units: mm [in]
All pins on a 2.54mm pitch
pin tolerance: ±0.10mm[±0.004in]
general tolerance: ±0.25mm[±0.010in]
general tolerance (right angle): ±0.50mm[±0.020in]
V78W-500
11.50 0.453
V78W-500R
9.00 0.354
11.50 0.453
9.00 0.354
17.50 0.689
17.50 0.689
0.50 0.020
0.50 0.020
4.10 0.161
1.50 0.059
5.08 0.200
2.15 0.085
5.08 0.200
2.15 0.085
1
2
0.50 0.020
3
1
2
3
4.10 0.161
0.55 0.022
RECOMMENDED FOOTPRINT
V78W-500
V78W-500R
1.10 0.043
(3 PLCS)
5.08 0.200
1.10 0.043
(3 PLCS)
5.08 0.200
3
2.15 0.085
1
2
3
2.54 0.100
2.54 0.100
2.54 0.100
2
1
1.35 0.053
PIN CONNECTIONS
2.54 0.100
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1
+Vin
2
GND
3
+Vout
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CUI Inc │ SERIES: V78W-500 │ DESCRIPTION: DC-DC CONVERTER
date 04/21/2015 │ page 4 of 5
TYPICAL APPLICATION CIRCUIT
APPLICATION EXAMPLE
High voltage input, multiple outputs, with greater load
1
+Vin
V78W-500(R)
3
+Vout
Reverse protection
1
+Vin
V7812W-500(R)
3
+12V/100mA
2
C1
2
C1
V7805W-500(R)
C2
F
GND
GND
GND
1. The regulator proposed to establish the input voltage by
soft-start, no plug and play, if the input voltage changes from
low voltage to high voltage abruptly, the regulator might be
damaged.
GND
1. The input current amount of the back-grade regulator and
the pre-class load should be less than or equal the max load
current of the pre-class regulator.
2. If the applications is high-voltage input, the regulator
must add an external capacitor C1(≤47μF/100V) to prevent
voltage spikes caused by damage to the module.
2. If further filtering is required, please add components
as per the above circuit (We recommend not to add
components), if request, please make sure the capacitors C1
≤47μF, C2≤10μF more close to the back-grade regulator.
3. No parallel connection.
MODULES PROTECT RECOMMENDED CIRCUIT
+5V/850mA
DERATING CURVE
Temperature Derating Graph
1
+Vin
V78W-500(R) 3
+Vout
2
GND
GND
1
+Vin
V78W-500(R)
2
3
Schottky Diode
Vout=
+Vout0.3V
Operating Temp.( C )
GND
GND
EMC RECOMMENDED CIRCUIT
0.5mH-2mH
+Vin
1
+Vo ut
Vin
3
GND
270 F-470 F
2
1.0 F-3.3 F
0.68 F-2.2 F
ND
0.5mH-2mH
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RL
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CUI Inc │ SERIES: V78W-500 │ DESCRIPTION: DC-DC CONVERTER
date 04/21/2015 │ page 5 of 5
REVISION HISTORY
rev.
description
date
1.0
initial release
09/28/2011
1.01
V-Infinity branding removed
09/06/2012
1.02
updated datasheet
04/21/2015
The revision history provided is for informational purposes only and is believed to be accurate.
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