STMICROELECTRONICS LD1085V12

LD1085 series
3A Low drop positive voltage regulator adjustable and fixed
Features
■
Typical dropout 1.3V (at 3A)
■
Three terminal adjustable or fixed output
voltage 1.5V, 1.8V, 2.5V, 3.3V, 5V, 12V.
■
Guaranteed output current up to 3A
■
Output tolerance ±1% at 25°C and ±2% in full
temperature range
■
Internal power and thermal limit
■
Wide operating temperature range -40°C to
125°C
■
Package available: TO-220, TO-220FP,
DPAK, D2PAK, D2PAK/A
■
Pinout compatibility with standard adjustable
VREG
TO-220
DPAK
TO-220FP
D2PAK
D2PAK/A
better performances in term of drop and output
tolerance.
Description
The LD1085 is a LOW DROP Voltage Regulator
able to provide up to 3A of Output Current.
Dropout is guaranteed at a maximum of 1.2V at
the maximum output current, decreasing at lower
loads. The LD1085 is pin to pin compatible with
the older 3-terminal adjustable regulators, but has
A 2.85V output version is suitable for SCSI-2
active termination. Unlike PNP regulators, where
a part of the output current is wasted as quiescent
current, the LD1085 quiescent current flows into
the load, so increase efficiency. Only a 10µF
minimum capacitor is need for stability.
The device is supplied in TO-220, TO-220FP,
DPAK, D2PAK and D2PAK/A. On chip trimming
allows the regulator to reach a very tight output
voltage tolerance, within ±1% at 25°C.
Schematic diagram
June 2007
Rev. 18
1/27
www.st.com
27
LD1085 series
Contents
1
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7
Order codes
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2/27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
LD1085 series
Pin configuration
1
Pin configuration
Figure 1.
Pin connections (top view)
TO-220
TO-220FP
D2PAK
D2PAK/A
DPAK
3/27
Maximum ratings
LD1085 series
2
Maximum ratings
Table 1.
Absolute maximum ratings
Symbol
Parameter
Value
Unit
30
V
VI
DC Input voltage
IO
Output current
Internally Limited
mA
PD
Power dissipation
Internally Limited
mW
TSTG
Storage temperature range
-55 to +150
°C
TOP
Operating junction temperature range
-40 to +125
°C
Note:
Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these condition is not implied
Table 2.
Thermal Data
Symbol
Parameter
TO-220
DPAK
D2PAK
D2PAK/A
Unit
RthJC
Thermal resistance junction-case
3
8
3
°C/W
RthJA
Thermal resistance junction-ambient
50
100
62.5
°C/W
4/27
LD1085 series
3
Schematic application
Figure 2.
Application circuit
Schematic application
R
V O = V REF ⋅ ⎛ 1 + ------2-⎞
⎝
R ⎠
1
5/27
Electrical characteristics
LD1085 series
4
Electrical characteristics
Table 3.
Electrical characteristics of LD1085#15
(VI=4.5V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Symbol
Parameter
Test
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25°C
1.485
1.5
1.515
V
IO = 0 to 3A, VI = 3.1 to 30V
1.47
1.5
1.53
V
IO = 0 mA, VI = 3.1 to 18V, TJ = 25°C
0.2
4
mV
IO = 0 mA, VI = 3.1 to 15V
0.4
4
mV
IO = 0 to 3A, TJ = 25°C
2
10
mV
IO = 0 to 3A
4
20
mV
VO
Output voltage (1)
ΔVO
Line Regulation
ΔVO
Load Regulation
Vd
Dropout Voltage
IO =3 A
1.3
1.5
V
Iq
Quiescent Current
VI ≤30V
5
10
mA
Isc
Short Circuit Current
SVR
eN
VI - VO = 5V
3.2
4.5
A
VI - VO = 25V
0.2
0.5
A
Thermal Regulation
TA = 25°C, 30ms pulse
Supply Voltage Rejection
f = 120 Hz, CO = 25µF, IO = 3A
VI = 7.5 ± 3V
RMS Output Noise Voltage (%
of VO)
TA = 25°C, f =10Hz to 10KHz
S
Temperature Stability
S
Long Term Stability
TA = 125°C, 1000Hrs
1. See short-circuit current curve for available output current at fixed dropout.
6/27
0.008
60
0.04
%/W
72
dB
0.003
%
0.5
%
0.5
%
LD1085 series
Table 4.
Symbol
Electrical characteristics
Electrical characteristics of LD1085#18
(VI=4.8V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Parameter
Test
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25°C
1.782
1.8
1.818
V
IO = 0 to 3A, VI = 3.4 to 30V
1.764
1.8
1.836
V
IO = 0 mA, VI = 3.4 to 18V TJ = 25°C
0.2
4
mV
IO = 0 mA, VI = 3.4 to 15V
0.4
4
mV
IO = 0 to 3A, TJ = 25°C
2
10
mV
IO = 0 to 3A
4
20
mV
VO
Output voltage (1)
ΔVO
Line Regulation
ΔVO
Load Regulation
Vd
Dropout Voltage
IO = 3 A
1.3
1.5
V
Iq
Quiescent Current
VI ≤30V
5
10
mA
Isc
Short Circuit Current
SVR
eN
VI - VO = 5V
3.2
4.5
A
VI - VO = 25V
0.2
0.5
A
Thermal Regulation
TA = 25°C, 30ms pulse
Supply Voltage Rejection
f = 120 Hz, CO = 25µF, IO = 3A
VI = 7.5 ± 3V
RMS Output Noise Voltage (%
of VO)
TA = 25°C, f =10Hz to 10KHz
S
Temperature Stability
S
Long Term Stability
TA = 125°C, 1000Hrs
0.008
60
0.04
%/W
72
dB
0.003
%
0.5
%
0.5
%
1. See short-circuit current curve for available output current at fixed dropout.
7/27
Electrical characteristics
Table 5.
Symbol
LD1085 series
Electrical characteristics of LD1085#25
(VI=5.5V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Parameter
Test
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25°C
2.475
2.5
2.525
V
IO = 0 to 3A, VI = 4.1 to 30V
2.45
2.5
2.55
V
IO = 0 mA, VI = 4.1 to 18V, TJ = 25°C
0.2
4
mV
IO = 0 mA, VI = 4.1 to 18V
0.4
4
mV
IO = 0 to 3A, TJ = 25°C
2
10
mV
IO = 0 to 3A
4
20
mV
VO
Output voltage (1)
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Dropout voltage
IO = 3A
1.3
1.5
V
Iq
Quiescent current
VI ≤30V
5
10
mA
Isc
Short circuit current
SVR
eN
VI - VO = 5V
3.2
4.5
A
VI - VO = 25V
0.2
0.5
A
Thermal regulation
TA = 25°C, 30ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25µF, IO = 3A
VI = 7.5 ± 3V
RMS Output noise voltage (% of
TA = 25°C, f =10Hz to 10KHz
VO)
S
Temperature stability
S
Long term stability
TA = 125°C, 1000Hrs
1. See short-circuit current curve for available output current at fixed dropout.
8/27
0.008
60
0.04
%/W
72
dB
0.003
%
0.5
%
0.5
%
LD1085 series
Table 6.
Symbol
Electrical characteristics
Electrical characteristics of LD1085#33
(VI=6.3V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Parameter
Test
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25°C
3.267
3.3
3.333
V
IO = 0 to 3A, VI = 4.9 to 30V
3.234
3.35
3.366
V
0.5
6
mV
IO = 0 mA, VI = 4.9 to 18V
1
6
mV
IO = 0 to 3A, TJ = 25°C
3
15
mV
IO = 0 to 3A
7
20
mV
VO
Output voltage (1)
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Dropout voltage
IO = 3A
1.3
1.5
V
Iq
Quiescent current
VI ≤30V
5
10
mA
Isc
Short circuit current
SVR
eN
IO = 0 mA, VI = 4.9 to 18V, TJ = 25°C
VI - VO = 5V
3.2
4.5
A
VI - VO = 25V
0.2
0.5
A
Thermal regulation
TA = 25°C, 30ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25µF, IO = 3A
VI = 8.3 ± 3V
RMS Output noise voltage (% of
TA = 25°C, f =10Hz to 10KHz
VO)
S
Temperature stability
S
Long term stability
TA = 125°C, 1000Hrs
0.008
60
0.04
%/W
72
dB
0.003
%
0.5
%
0.5
%
1. See short-circuit current curve for available output current at fixed dropout.
9/27
Electrical characteristics
Table 7.
Symbol
LD1085 series
Electrical characteristics of LD1085#50
(VI=8V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Parameter
Test
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25°C
4.95
5
5.05
V
IO = 0 to 3A, VI = 6.6 to 30V
4.9
5
5.1
V
0.5
10
mV
IO = 0 mA, VI = 6.6 to 20V
1
10
mV
IO = 0 to 3A, TJ = 25°C
5
10
mV
IO = 0 to 3A
10
35
mV
VO
Output voltage (1)
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Dropout voltage
IO = 3A
1.3
1.5
V
Iq
Quiescent current
VI ≤30V
5
10
mA
Isc
Short circuit current
SVR
eN
IO = 0 mA, VI = 6.6 to 20V, TJ = 25°C
VI - VO = 5V
3.2
4.5
A
VI - VO = 25V
0.2
0.5
A
Thermal regulation
TA = 25°C, 30ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25µF, IO = 3A
VI = 10 ± 3V
RMS Output noise voltage (% of
TA = 25°C, f =10Hz to 10KHz
VO)
S
Temperature stability
S
Long term stability
TA = 125°C, 1000Hrs
1. See short-circuit current curve for available output current at fixed dropout.
10/27
0.008
60
0.04
%/W
72
dB
0.003
%
0.5
%
0.5
%
LD1085 series
Table 8.
Symbol
Electrical characteristics
Electrical characteristics of LD1085#12
(VI=15V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Parameter
VO
Output voltage (1)
ΔVO
Line regulation
Test
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25°C
11.88
12
12.12
V
IO = 0 to 3A, VI = 13.8 to 30V
11.76
12
12.24
V
IO = 0 mA, VI = 13.8 to 25V,
TJ = 25°C
1
25
mV
IO = 0 mA, VI = 13.8 to 25V
2
25
mV
IO = 0 to 3A, TJ = 25°C
12
36
mV
IO = 0 to 3A
24
72
mV
ΔVO
Load regulation
Vd
Dropout voltage
IO = 3A
1.3
1.5
V
Iq
Quiescent current
VI ≤30V
5
10
mA
Isc
Short circuit current
SVR
eN
VI - VO = 5V
3.2
4.5
A
VI - VO = 25V
0.2
0.5
A
Thermal regulation
TA = 25°C, 30ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25µF, IO = 3A
VI = 17 ± 3V
RMS Output noise voltage (% of
TA = 25°C, f =10Hz to 10KHz
VO)
S
Temperature stability
S
Long term stability
TA = 125°C, 1000Hrs
0.008
54
0.04
%/W
66
dB
0.003
%
0.5
%
0.5
%
1. See short-circuit current curve for available output current at fixed dropout.
11/27
Electrical characteristics
Table 9.
Symbol
LD1085 series
Electrical characteristics of LD1085#
(VI=4.25V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Parameter
VO
Output voltage (1)
ΔVO
Line Regulation
Test
Min.
Typ.
Max.
Unit
IO = 10mA TJ = 25°C
1.237
1.25
1.263
V
IO = 10mA to 3A, VI = 2.85 to 30V
1.225
1.25
1.275
V
IO = 10mA, VI = 2.85 to 16.5V,
TJ = 25°C
0.015
0.2
%
IO = 10mA, VI = 2.85 to 16.5V
0.035
0.2
%
IO = 10mA to 3A, TJ = 25°C
0.1
0.3
%
IO = 0 to 3A
0.2
0.4
%
ΔVO
Load Regulation
Vd
Dropout Voltage
IO = 3A
1.3
1.5
V
Minimum Load Current
VI = 30V
3
10
mA
IO(min)
Isc
Short Circuit Current
VI - VO = 5V
5.5
6.5
A
VI - VO = 25V
0.5
0.7
A
Thermal Regulation
TA = 25°C, 30ms pulse
SVR
Supply Voltage Rejection
f = 120 Hz, CO = 25µF,CADJ = 25 µF,
IO = 3A, VI = 6.25 ± 3V
IADJ
Adjust Pin Current
ΔIADJ
eN
Adjust Pin Current Change
(1)
RMS Output Noise Voltage (%
of VO)
S
Temperature Stability
S
Long Term Stability
60
72
%/W
dB
VI = 4.25V, IO = 10 mA
55
120
μA
IO = 10mA to 3A, VI = 2.85 to 16.5V
0.2
5
μA
TA = 25°C, f =10Hz to 10KHz
TA = 125°C, 1000Hrs
1. See short-circuit current curve for available output current at fixed dropout.
12/27
0.003 0.015
0.003
%
0.5
%
0.5
%
LD1085 series
Typical application
5
Typical application
Figure 3.
(Unless otherwise specified TJ = 25°C, CI = CO = 10µF)
Output voltage vs temperature
Figure 4.
Output voltage vs temperature
Figure 5.
Output voltage vs temperature
Figure 6.
Short circuit current vs dropout
voltage
Figure 7.
Line regulation vs temperature
Figure 8.
Load regulation vs temperature
13/27
Typical application
Figure 9.
Dropout voltage vs temperature
LD1085 series
Figure 10. Dropout voltage vs output current
Figure 11. Adjust pin current vs temperature
Figure 12. Quiescent current vs temperature
Figure 13. Line regulation vs temperature
Figure 14. Supply voltage rejection vs output
current
14/27
LD1085 series
Typical application
Figure 15. Supply voltage rejection vs
frequency
Figure 16. Supply voltage rejection vs
temperature
Figure 17. Minimum load current vs
temperature
Figure 18. Stability
Figure 19. Stability
Figure 20. Line transient
VI=12 to 13V, IO=200mA, CI = 1µF(tant), CO=10µF(tant),
CADJ=1µF
15/27
Typical application
LD1085 series
Figure 21. Line transient
Figure 22. Load transient
VI=12 to 13V, IO=200mA, CI = 1µF(tant), CO=10µF(tant),
CADJ=1µF
VI=12V, IO=0.12 to 3A, CI = 1µF(tant), CO=10µF(tant),
CADJ=1µF
Figure 23. Load transient
VI=12V, IO=0.12 to 3A, CI = 1µF(tant), CO=10µF(tant),
CADJ=1µF
16/27
LD1085 series
6
Package mechanical data
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
17/27
Package mechanical data
LD1085 series
TO-220 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
inch
MAX.
MIN.
TYP.
MAX.
A
4.40
4.60
0.173
0.181
C
1.23
1.32
0.048
0.051
D
2.40
2.72
0.094
D1
1.27
0.107
0.050
E
0.49
0.70
0.019
0.027
F
0.61
0.88
0.024
0.034
F1
1.14
1.70
0.044
0.067
F2
1.14
1.70
0.044
0.067
G
4.95
5.15
0.194
0.203
G1
2.4
2.7
0.094
0.106
H2
10.0
10.40
0.393
0.409
14.0
0.511
L2
L4
16.4
13.0
0.645
0.551
L5
2.65
2.95
0.104
0.116
L6
15.25
15.75
0.600
0.620
L7
6.2
6.6
0.244
0.260
L9
3.5
3.93
0.137
0.154
DIA.
3.75
3.85
0.147
0.151
P011C
18/27
LD1085 series
Package mechanical data
TO-220FP MECHANICAL DATA
mm.
DIM.
MIN.
TYP
inch
MAX.
MIN.
TYP.
MAX.
A
4.40
4.60
0.173
0.181
B
2.5
2.7
0.098
0.106
D
2.5
2.75
0.098
0.108
E
0.45
0.70
0.017
0.027
F
0.75
1
0.030
0.039
F1
1.15
1.50
0.045
0.059
F2
1.15
1.50
0.045
0.059
G
4.95
5.2
0.194
0.204
G1
2.4
2.7
0.094
0.106
H
10.0
10.40
0.393
L2
16
0.409
0.630
L3
28.6
30.6
1.126
1.204
L4
9.8
10.6
0.385
0.417
L5
2.9
3.6
0.114
0.142
L6
15.9
16.4
0.626
0.645
L7
9
9.3
0.354
0.366
DIA.
3
3.2
0.118
0.126
7012510A-H
19/27
Package mechanical data
LD1085 series
DPAK MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
A1
A2
B
b4
2.2
0.9
0.03
0.64
5.2
2.4
1.1
0.23
0.9
5.4
0.086
0.035
0.001
0.025
0.204
0.094
0.043
0.009
0.035
0.212
C
C2
D
D1
E
E1
0.45
0.48
6
0.6
0.6
6.2
0.017
0.019
0.236
0.023
0.023
0.244
6.6
0.252
e
e1
H
L
(L1)
L2
L4
R
V2
5.1
6.4
0.200
4.7
2.28
4.4
9.35
1
0.090
4.6
10.1
0.173
0.368
0.039
2.8
0.8
0.6
0.181
0.397
0.110
0.031
1
0.023
0.2
0°
0.260
0.185
0.039
0.008
8°
0°
8°
0068772-F
20/27
LD1085 series
Package mechanical data
D2PAK MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
4.4
4.6
0.173
0.181
A1
2.49
2.69
0.098
0.106
A2
0.03
0.23
0.001
0.009
B
0.7
0.93
0.027
0.036
B2
1.14
1.7
0.044
0.067
C
0.45
0.6
0.017
0.023
C2
1.23
1.36
0.048
0.053
D
8.95
9.35
0.352
D1
E
8
10
E1
0.368
0.315
10.4
0.393
8.5
0.409
0.335
G
4.88
5.28
0.192
0.208
L
15
15.85
0.590
0.624
L2
1.27
1.4
0.050
0.055
L3
1.4
1.75
0.055
0.068
M
2.4
3.2
0.094
R
V2
0.4
0˚
0.126
0.016
8˚
0˚
8˚
P011P6G
21/27
Package mechanical data
LD1085 series
D2PAK/A MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
4.40
4.60
0.173
0.181
A1
2.49
2.69
0.098
0.106
A2
0.03
0.23
0.001
0.009
B
0.7
0.93
0.028
0.037
B1
0.8
1.3
0.031
0.051
B2
1.14
1.7
0.045
0.067
C
0.45
0.60
0.018
0.024
C2
1.23
1.36
0.048
0.054
D
8.95
9.35
0.352
0.368
D1
E
8
10
E1
0.315
10.4
0.394
8.5
0.409
0.335
G
4.88
5.28
0.192
L
15
15.85
0.591
0.624
L2
1.27
1.4
0.050
0.055
M
2.4
3.2
0.094
R
V2
0.4
0°
0.208
0.126
0.016
8°
0°
8°
7106164/D
22/27
LD1085 series
Package mechanical data
Tape & Reel DPAK-PPAK MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MAX.
MIN.
TYP.
330
13.0
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
MAX.
0.504
0.512
22.4
0.519
0.882
Ao
6.80
6.90
7.00
0.268
0.272
0.2.76
Bo
10.40
10.50
10.60
0.409
0.413
0.417
Ko
2.55
2.65
2.75
0.100
0.104
0.105
Po
3.9
4.0
4.1
0.153
0.157
0.161
P
7.9
8.0
8.1
0.311
0.315
0.319
23/27
Package mechanical data
LD1085 series
Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/A MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MIN.
TYP.
180
13.0
13.2
MAX.
7.086
C
12.8
D
20.2
0.795
N
60
2.362
T
24/27
MAX.
0.504
0.512
14.4
0.519
0.567
Ao
10.50
10.6
10.70
0.413
0.417
0.421
Bo
15.70
15.80
15.90
0.618
0.622
0.626
Ko
4.80
4.90
5.00
0.189
0.193
0.197
Po
3.9
4.0
4.1
0.153
0.157
0.161
P
11.9
12.0
12.1
0.468
0.472
0.476
LD1085 series
Order codes
7
Order codes
Table 10.
Order codes
Part numbers
Packages
TO-220
TO-220FP
D2
PAK
DPAK (T&R)
2
D PAK/A
2
D PAK/A (T&R)
LD1085DT15R
Output
voltage
1.5 V
LD1085V18
LD1085DT18R
LD1085D2M18R
1.8 V
LD1085V25
LD1085DT25R
LD1085D2M25R
2.5 V
LD1085DT33R
LD1085D2M33R
3.3 V
LD1085V33
LD1085D2T33
LD1085V50
LD1085D2M50
5.0 V
LD1085V12
LD1085D2M12 LD1085D2M12R
12.0 V
LD1085V
LD1085P
LD1085D2T
LD1085DT-R
LD1085CDT-R
LD1085D2M
LD1085D2M-R
ADJ
ADJ
25/27
Revision history
LD1085 series
8
Revision history
Table 11.
Revision history
Date
Revision
07-Oct-2004
12
Mistake Order Codes - Table 1.
08-Feb-2005
13
Mistake U.M. Load Regulation - V ==> mV.
01-Mar-2005
14
Version 1.2V removed.
22-May-2006
15
Order Codes has been updated and new template.
10-Nov-2006
16
Add package DPAK, typo on VO test value in tables 3, 4 and 11.
04-Apr-2007
17
Order codes has been updated.
07-Jun-2007
18
Order codes has been updated.
26/27
Changes
LD1085 series
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