Datasheet

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date
01/26/2016
page
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
input
voltage
output
voltage
output
current
output
power
ripple and
noise1
efficiency
typ
(Vdc)
range
(Vdc)
(Vdc)
(mA)
max
(W)
max
(mVp-p)
Vin min
(%)
Vin max
(%)
V7803-500-SMT
12
4.5 ~ 28
3.3
500
1.65
25
90
75
V7805-500-SMT
12
6 ~ 28
5
500
2.5
25
94
81
V7812-500-SMT2
24
14 ~ 28
12
500
6
25
95
90
V7815-500-SMT
24
17 ~ 28
15
500
7.5
25
96
92
2
Notes:
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
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Package Options
"blank" = standard
TR = Tape & Reel
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CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 01/26/2016 │ page 2 of 8
INPUT
parameter
conditions/description
min
typ
max
units
input voltage
3.3 Vdc output
5 Vdc output
12 Vdc output
15Vdc output
4.5
6
14
17
12
12
24
24
28
28
28
28
Vdc
Vdc
Vdc
Vdc
1.1
1.25
1.4
Vdc
remote on/off shutdown
threshold voltage
on/off control current
on:
off:
open or 1.5<Vc≤6V
GND or 0V<Vc<1V
2
shutdown input current
µA
15
30
µA
typ
max
units
OUTPUT
parameter
conditions/description
min
max capacitive load
1000
µF
line regulation
measured from low line to high line at 100% load
±0.2
±0.5
%
load regulation
measured from 10% to full load at nominal input
±0.3
±0.75
%
voltage accuracy
measured from low line to high line at 100% load
±2
±3
%
adjustability
see application notes
±0.02
%/°C
max
units
1
temperature coefficient
Notes:
1. output voltage adjustment must meet Vin-Vo > 2V requirement
PROTECTIONS
parameter
conditions/description
short circuit protection
hiccup, continuous, automatic recovery
min
thermal shutdown
internal IC junction
current limit
typ
160
°C
1.8
A
SAFETY AND COMPLIANCE
parameter
conditions/description
RoHS
2011/65/EU
MTBF
as per MIL-HDBK-217F, 25°C
min
typ
max
2,000,000
units
hours
ENVIRONMENTAL
parameter
conditions/description
min
see derating curve
-40
-55
case operating temperature
operating temperature
storage temperature
storage humidity
typ
max
units
100
°C
85
°C
125
°C
95
%
hand soldering
for 10 seconds
300
°C
reflow soldering
refer to IPC/JEDEC J-STD-020D.1
240
°C
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CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 01/26/2016 │ page 3 of 8
DERATING CURVES
Load (%)
100
80
60
40
20
-40
-20
0
20
40
60
71
85
100
120
Ambient Temperature (°C)
MECHANICAL
parameter
conditions/description
min
dimensions
15.24 x 8.30 x 7.25 (0.600 x 0.327 x 0.285 inch)
case material
plastic (UL94-V0)
weight
typ
units: mm [in]
pin tolerance: ±0.10 mm [±0.004 in]
general tolerance: ±0.25 mm [±0.010 in]
PIN CONNECTIONS
1
Vin
5
Vout
6
Vadj
7
GND
9
GND
10
On/Off
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units
mm
2.3
MECHANICAL DRAWING
max
g
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CUI Inc │ 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]
8.20 [0.323]
10.20 [0.402]
10.20[0.402]
6.50 [0.256]
0.50 [0.020]
15.65 [0.616]
14.70 [0.579]
1.75 [0.069]
11.50 [0.453]
2.00 [0.079]
12.40 [0.488]
16.00 [0.630]
Taping reel dimension:
∅1.50 [0.059]
7.65 [0.301]
29.40 [1.157]
∅330.00 [12.992]
5.60 [0.220]
∅100.00[3.937]
Note:
Unit :mm[inch]
General tolerances:
0.50mm[ 0.020inch]
L=530mm[20.866inch] Tube Quantity: 33pcs
L=220mm[8.661inch] Tube Quantity: 13pcs
∅13.00 [0.512]
∅21.50 [0.846]
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
C1
(ceramic capacitor)
C2
(ceramic capacitor)
V7803-500-SMT
10uF/50V
22uF/16V
V7805-500-SMT
10uF/50V
22uF/16V
V7812-500-SMT
10uF/50V
10uF/25V
V7815-500-SMT
10uF/50V
10uF/25V
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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
Vo nom
V7803-500-SMT
3.3 V
V7805-500-SMT
5.0 V
V7812-500-SMT
12V
V7815-500-SMT
15V
Trim Down
Trim Up
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
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
=
6 6*Vo -26 9.37
15-Vo
=
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
DC /DC
Co nvert er
7 9
C1
Copp er strip
1 F
6
470pF
C5
GND
5
C2 C3
+Vout
10 F
Cer amic Ta ntalum Scope
Load
1
2.54mm
Vin
Cerami c
Copper strip
2) Start-up and Load Transient Response Test
5 0.8 m m
C1
GND
D C / DC
C onverter
7 9
5
6
C5
47 0p F
C er am ic
Co ppe r s trip
Scope
C2 C3
Cop pe r s trip
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+Vout
L oa d
1
2 .54 m m
Vin
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CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 01/26/2016 │ page 6 of 8
EFFICIENCY AND RIPPLE
Efficiency (%)
Ripple (m V)
100
45
90
40
80
35
70
V7803-500-SMT
60
V7805-500-SMT
50
V7812-500-SMT
V7815-500-SMT
40
V7803-500-SMT
30
V7805-500-SMT
25
V7812-500-SMT
V7815-500-SMT
20
15
30
20
10
10
5
0
20
50
80 120 160 200 240 280 320 360 400 440 480 500 550 Load (m A)
0
20
Efficiency VS Output Load (Vin=Norm)
50
80 120 160 200 240 280 320 360 400 440 480 500 550 Load (m A)
Output Voltage Ripple VS Output Load (Vin=Norm)
Ripple (mV)
Efficiency (%)
100
45
95
40
90
35
85
V7803-500-SMT
80
V7805-500-SMT
75
70
65
V7812-500-SMT
25
V7815-500-SMT
20
60
V7803-500-SMT
30
V7805-500-SMT
V7812-500-SMT
V7815-500-SMT
15
55
10
50
5
45
0
40
4.5
6
8
10 12 14 16 17 20 22 24 26 28 Vin(V)
Efficiency VS Input Voltage (Full Load)
4.5
6
8
10 12 14 16 17 20 22 24 26 28 Vin (V)
Output Voltage Ripple VS Input Voltage (Full Load)
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
[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.
For more information, please visit the product page.
CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 01/26/2016 │ page 7 of 8
SHUTDOWN CONTROL
The ON/OFF pin provides several features for adjusting and sequencing the power supply, a user has the flexibility of using the ON/OFF pin as:
1) A digital on/off control by pulling down the ON/OFF pin with an open-drain transistor.
ON/OFF
2) Line UVLO. If desired to achieve a UVLO voltage, a resistor divider from Vin to ON/OFF to GND can be used to disable the converter until
a higher input voltage is achieved. For example, it is not useful for a converter with 12V output to start up with a 12V input , as the
output cannot each regulation. To enable the converter when the input voltage reaches 14V, a 51kΩ/5kΩ voltage divider from Vin to GND
can be connected to the ON/OFF pin. Both the precision 1.25V threshold and 150mV hysteresis are multiplied by the resistor ratio,
providing a proportional 12% hysteresis for any startup threshold. So, the turn off threshold would be between 12.3V to 15.7V.
1
10
51 KΩ
C1
V78XX-500-SMT
7,9
+Vout
6
470pF
5 KΩ
GND
5
100 F
Lo ad
Vin
3) Power supply sequencing. By connecting a small capacitor from ON/OFF to GND, the 2 A current source and 1.25V threshold can provide
a stable and predictable delay between startup of multiple power supplies. For example, a startup delay of roughly 64mS is provided using
100nF, and roughly 136mS by using 200nF.
+Vout
1 V78XX- 500- SM T 5
C1
10
7,9
6
C5
GND
470pF
100nF
Loa d
Vin
100 F
CH1: Von/off
CH2: Vo
Delay time: 64mS
1
C1
V78XX- 500- SM T
10
C5
GND
2 00 nF
7,9
5
+Vout
6
4 70pF
100 F
Load
Vin
CH1: Von/off
CH2: Vo
Delay time: 136mS
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CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 01/26/2016 │ page 8 of 8
REVISION HISTORY
rev.
description
date
1.0
initial release
01/04/2008
1.01
new template applied
04/28/2009
1.02
V-Infinity branding removed
09/06/2012
1.03
added TR package option
10/31/2012
1.04
added minimum loading requirement note
01/30/2013
1.05
updated spec
03/08/2013
1.06
housing width changed, updated datasheet
01/26/2016
The revision history provided is for informational purposes only and is believed to be accurate.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
[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.