L4940D2M12 [STMICROELECTRONICS]
12V FIXED POSITIVE LDO REGULATOR, 0.9V DROPOUT, PSSO3, D2PAK/A-3;
| 型号： | L4940D2M12 |
| 厂家： | 
ST |
| 描述： | 12V FIXED POSITIVE LDO REGULATOR, 0.9V DROPOUT, PSSO3, D2PAK/A-3 输出元件 调节器 |
| 文件： | 总18页 (文件大小：1451K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
L4940
SERIES
VERY LOW DROP 1.5A REGULATORS
I
I
PRECISE 5, 8.5, 10, 12V OUTPUTS
LOW DROPOUT VOLTAGE
(500mV Typ. at 1.5A)
I
I
I
I
VERY LOW QUIESCENT CURRENT
THERMAL SHUTDOWN
SHORT CIRCUIT PROTECTION
REVERSE POLARITY PROTECTION
TO-220
TO-220FP
DESCRIPTION
The L4940 series of three terminal positive
regulators is available in TO-220, TO-220FP and
2
D PAK packages and with several fixed output
voltages, making it useful in a wide range of
industrial and consumer applications. Thanks to
its very low input/output voltage drop, these
devices are particularly suitable for batteries
powered equipment, reducing consumption and
prolonging battery life. Each type employs internal
current limiting, antisaturation circuit, thermal
shut-down and safe area protection.
2
2
D PAK
D PAK/A
Figure 1: Block Diagram
Rev. 6
February 2005
1/18
L4940 SERIES
Table 1: Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
V
Forward Input Voltage
Reverse Input Voltage
30
-15
V
V
I
V =5V
R =100Ω
O
O
V =8.5V R =180Ω
-15
V
O
O
V
I
IR
V =10V R =200Ω
-15
V
O
O
V =12V R =240Ω
-15
V
O
O
Output Current
Internally Limited
Internally Limited
-40 to +150
-40 to +150
mA
mW
°C
°C
O
P
Power Dissipation
D
T
Storage Temperature Range
Operating Junction Temperature Range
stg
T
op
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
2
Symbol
Parameter
TO-220
TO-220FP
Unit
D PAK
R
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
3
5
3
°C/W
°C/W
thj-case
R
50
60
62.5
thj-amb
Figure 2: Connection Diagram (top view)
TO-220
TO-220FP
2
2
D PAK
D PAK/A
Table 3: Order Codes
2
2
TO-220
TO-220FP
OUTPUT VOLTAGE
D PAK (*)
D PAK/A (**)
L4940V5
L4940V85
L4940V10
L4940V12
L4940P5
L4940P85
L4940P10
L4940P12
L4940D2T5
L4940D2T85
L4940D2T10
L4940D2T12
L4940D2M5
L4940D2M85
L4940D2M10
L4940D2M12
5 V
8.5 V
10 V
12 V
(*) Available in Tape & Reel with the suffix "-TR".
(**) Available on Request.
2/18
L4940 SERIES
TEST CIRCUITS
Figure 3: DC Parameter
Figure 4: Load Rejection
Figure 5: Ripple Rejection
3/18
L4940 SERIES
Table 4: Electrical Characteristics Of L4940V5 (Refer to test circuit, V =7V, C = 0.1µF, C = 22µF,
I
I
O
T = 25°C, unless otherwise specified.)
J
Symbol
Parameter
Output Voltage
Test Conditions
Min.
4.9
Typ.
Max.
5.1
5.2
17
10
25
15
8
Unit
V
V
V
I
I
I
= 500 mA
5
5
O
O
O
O
O
Output Voltage
Input Voltage
= 5mA to 1.5A
= 5 mA
V = 6.5 to 15V
4.8
V
I
V
V
I
∆V
∆V
Line Regulation
Load Regulation
V = 6 to 17V
I = 5 mA
O
4
8
mV
mV
mV
mA
mA
mA
mA
mv/°C
dB
O
O
I
I
I
I
I
I
I
= 5mA to 1.5A
= 0.5A to 1A
= 5 mA
O
O
O
O
O
O
5
I
Quiescent Current
5
q
= 1.5A
V = 6.5V
30
50
3
I
∆I
Quiescent Current Change
= 5 mA
q
= 1.5A
V = 6.5 to 16V
15
I
∆V /∆T Output Voltage Drift
0.5
68
O
SVR Supply Voltage Rejection
f = 120Hz
I
= 1A
58
O
V
Dropout Voltage
I
I
= 0.5A
= 1.5A
200
500
2
400
900
2.7
mV
mV
A
d
O
O
I
Short Circuit Current
V = 14V
I
sc
V = 6.5V
2.2
2.9
I
Table 5: Electrical Characteristics Of L4940V85 (Refer to test circuit, V =10.5V, C = 0.1µF,
I
I
C = 22µF,T = 25°C, unless otherwise specified.)
O
J
Symbol
Parameter
Test Conditions
Min.
8.3
Typ.
8.5
Max.
8.7
8.85
17
Unit
V
V
V
Output Voltage
Output Voltage
Input Voltage
I
I
I
= 500 mA
O
O
O
O
O
= 5mA to 1.5A
= 5 mA
V = 10.2 to 16V
8.15
8.5
V
I
V
V
I
∆V
∆V
Line Regulation
Load Regulation
V = 9.5 to 17V
I = 5 mA
O
4
12
8
9
mV
mV
mV
mA
mA
mA
mA
mv/°C
dB
O
O
I
I
I
I
I
I
I
= 5mA to 1.5A
= 0.5A to 1A
= 5 mA
30
O
O
O
O
O
O
16
I
Quiescent Current
4
8
q
= 1.5A
V = 10.2V
30
50
I
∆I
Quiescent Current Change
= 5 mA
2.5
15
q
= 1.5A
V = 10.2 to 16V
I
∆V /∆T Output Voltage Drift
0.8
66
O
SVR Supply Voltage Rejection
f = 120Hz
I
= 1A
58
O
V
Dropout Voltage
I
I
= 0.5A
= 1.5A
200
500
2
400
900
2.7
mV
mV
A
d
O
O
I
Short Circuit Current
V = 14V
I
sc
V = 10.2V
2.2
2.9
I
4/18
L4940 SERIES
Table 6: Electrical Characteristics Of L4940V10 (Refer to test circuit, V =12V, C = 0.1µF,
I
I
C = 22µF, T = 25°C, unless otherwise specified.)
O
J
Symbol
Parameter
Test Conditions
Min.
9.8
Typ.
10
Max.
10.2
10.4
17
8
Unit
V
V
V
Output Voltage
Output Voltage
Input Voltage
I
I
I
= 500 mA
O
O
O
O
O
= 5mA to 1.5A
= 5 mA
V = 11.7 to 15V
9.6
10
V
I
V
V
I
∆V
∆V
Line Regulation
Load Regulation
V = 11 to 17V
I = 5 mA
O
3
mV
mV
mV
mA
mA
mA
mA
mv/°C
dB
O
O
I
I
I
I
I
I
I
= 5mA to 1.5A
= 0.5A to 1A
= 5 mA
15
10
5
35
20
8
O
O
O
O
O
O
I
Quiescent Current
q
= 1.5A
V = 11.7V
30
50
2
I
∆I
Quiescent Current Change
= 5 mA
q
= 1.5A
V = 11.7 to 16V
13
I
∆V /∆T Output Voltage Drift
1
O
SVR Supply Voltage Rejection
f = 120Hz
I
= 1A
56
62
O
V
Dropout Voltage
I
I
= 0.5A
= 1.5A
200
500
2
400
900
2.7
mV
mV
A
d
O
O
I
Short Circuit Current
V = 14V
I
sc
V = 11.7V
2.2
2.9
I
Table 7: Electrical Characteristics Of L4940V12 (Refer to test circuit, V =14V, C = 0.1µF,
I
I
C = 22µF, T = 25°C, unless otherwise specified.)
O
J
Symbol
Parameter
Test Conditions
Min.
11.75
11.5
Typ.
12
Max.
12.25
12.5
17
Unit
V
V
V
Output Voltage
Output Voltage
Input Voltage
I
I
I
= 500 mA
O
O
O
O
O
= 5mA to 1.5A
= 5 mA
V = 13.8 to 15V
12
V
I
V
V
I
∆V
∆V
Line Regulation
Load Regulation
V = 13 to 17V
I = 5 mA
O
3
7
mV
mV
mV
mA
mA
mA
mA
mv/°C
dB
O
O
I
I
I
I
I
I
I
= 5mA to 1.5A
= 0.5A to 1A
= 5 mA
15
10
4
35
O
O
O
O
O
O
25
I
Quiescent Current
8
q
= 1.5A
V = 13.8V
30
50
I
∆I
Quiescent Current Change
= 5 mA
1.5
10
q
= 1.5A
V = 13.8 to 16V
I
∆V /∆T Output Voltage Drift
1.2
61
O
SVR Supply Voltage Rejection
f = 120Hz
I
= 1A
55
O
O
V
Dropout Voltage
I
I
= 0.5A
= 1.5A
200
500
2
400
900
2.7
mV
mV
A
d
O
O
I
Short Circuit Current
Output Impedance
V = 14V
sc
I
Z
f = 120Hz
I
= 0.5A
40
mΩ
O
5/18
L4940 SERIES
TYPICAL CHARACTERISTICS
Figure 6: Dropout Voltage vs Output Current
Figure 9: Output Voltage vs Temperature
(L4940V85)
Figure 7: Dropout Voltage vs Temperature
Figure 10: Output Voltage vs Temperature
(L4940V10)
Figure 8: Output Voltage vs Temperature
Figure 11: Output Voltage vs Temperature
(L4940V5)
(L4940V12)
6/18
L4940 SERIES
Figure 12: Quiescent Current vs Temperature
Figure 15: Short Circuit Current vs Temperature
(L4940V5)
(L4940V5)
Figure 13: Quiescent Current vs Input Voltage
Figure 16: Peak Output Current vs Input/Output
(L4940V5)
Differential Voltage (L4940V5)
Figure 14: Quiescent Current vs Output Current
Figure 17: Low Voltage Behavior (L4940V5)
(L4940V5)
7/18
L4940 SERIES
Figure 18: Low Voltage Behavior (L4940V85)
Figure 21: Supply Voltage Rejection vs
Frequency (L4940V5)
Figure 19: Low Voltage Behavior (L4940V10)
Figure 22: Supply Voltage Rejection vs Output
Current (L4940V5)
Figure 20: Low Voltage Behavior (L4940V12)
Figure 23: Lad Dump Characteristics (L4940V5)
8/18
L4940 SERIES
Figure 24: Line Transient Response (L4940V5)
Figure 26: Load Transient Response
Figure 25: Total Power Dissipation
9/18
L4940 SERIES
Figure 27: Distributed Supply with On-card L4940 and L4941 low drop regulator
Figure 28: Distributed Supply with On-card L4940 and L4941 low drop regulator
ADVANTAGES OTF THESE APPLICATION ARE:
On card regulation with short-circuit and thermal protection on each output.
Vary high total system efficiency due to the switching preregulation and very low-drop postregulation
10/18
L4940 SERIES
Figure 29: Distributed Supply with On-card L4940 and L4941 low drop regulator
ADVANTAGES OF THIS CONFIGURATION ARE:
Very high regulation (line and load on both the output voltage
12V output short circuit and thermally protected
Very high efficiency on the 12 V output due to the low drop regulator
11/18
L4940 SERIES
TO-220 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
4.40
1.23
2.40
TYP
MAX.
4.60
1.32
2.72
MIN.
0.173
0.048
0.094
MAX.
0.181
0.051
0.107
A
C
D
D1
E
1.27
0.050
0.49
0.61
1.14
1.14
4.95
2.4
0.70
0.88
1.70
1.70
5.15
2.7
0.019
0.024
0.044
0.044
0.194
0.094
0.393
0.027
0.034
0.067
0.067
0.203
0.106
0.409
F
F1
F2
G
G1
H2
L2
L4
L5
L6
L7
L9
DIA.
10.0
10.40
16.4
0.645
13.0
2.65
15.25
6.2
14.0
2.95
15.75
6.6
0.511
0.104
0.600
0.244
0.137
0.147
0.551
0.116
0.620
0.260
0.154
0.151
3.5
3.93
3.85
3.75
P011C
12/18
L4940 SERIES
TO-220FP MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
4.40
2.5
TYP
MAX.
4.60
2.7
MIN.
0.173
0.098
0.098
0.017
0.030
0.045
0.045
0.194
0.094
0.393
MAX.
0.181
0.106
0.108
0.027
0.039
0.059
0.059
0.204
0.106
0.409
A
B
D
2.5
2.75
0.70
1
E
0.45
0.75
1.15
1.15
4.95
2.4
F
F1
F2
G
1.50
1.50
5.2
G1
H
2.7
10.0
10.40
L2
L3
L4
L5
L6
L7
DIA.
16
0.630
28.6
9.8
2.9
15.9
9
30.6
10.6
3.6
1.126
0.385
0.114
0.626
0.354
0.118
1.204
0.417
0.142
0.645
0.366
0.126
16.4
9.3
3
3.2
7012510A-H
13/18
L4940 SERIES
D2PAK MEC
HANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
MIN.
MAX.
A
A1
A2
B
4.4
2.49
0.03
0.7
4.6
2.69
0.23
0.93
1.7
0.173
0.098
0.001
0.027
0.044
0.017
0.048
0.352
0.181
0.106
0.009
0.036
0.067
0.023
0.053
0.368
B2
C
1.14
0.45
1.23
8.95
0.6
C2
D
1.36
9.35
D1
E
8
0.315
0.335
10
10.4
0.393
0.409
E1
G
8.5
4.88
15
5.28
15.85
1.4
0.192
0.590
0.050
0.055
0.094
0.208
0.624
0.055
0.068
0.126
L
L2
L3
M
1.27
1.4
1.75
3.2
2.4
R
0.4
0.016
V2
0˚
8˚
0˚
8˚
011P6G
14/18
L4940 SERIES
D2PAK/A MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
MIN.
MAX.
A
A1
A2
B
4.40
2.49
0.03
0.7
4.60
2.69
0.23
0.93
1.3
0.173
0.098
0.001
0.028
0.031
0.045
0.018
0.048
0.352
0.181
0.106
0.009
0.037
0.051
0.067
0.024
0.054
0.368
B1
B2
C
0.8
1.14
0.45
1.23
8.95
1.7
0.60
1.36
9.35
C2
D
D1
E
8
0.315
0.335
10
10.4
0.394
0.409
E1
G
8.5
4.88
15
5.28
15.85
1.4
0.192
0.591
0.050
0.094
0.208
0.624
0.055
0.126
L
L2
M
1.27
2.4
3.2
R
0.4
0.016
V2
0°
8°
0°
8°
7106164/D
15/18
L4940 SERIES
Tape & Reel D2PAK-P2PAK-D2PAK/A-P2PAK/A MECHANICAL DATA
mm.
TYP
inch
TYP.
DIM.
MIN.
MAX.
180
MIN.
MAX.
7.086
0.519
A
C
12.8
20.2
60
13.0
13.2
0.504
0.795
2.362
0.512
D
N
T
14.4
10.70
15.90
5.00
4.1
0.567
0.421
0.626
0.197
0.161
0.476
Ao
Bo
Ko
Po
P
10.50
15.70
4.80
3.9
10.6
15.80
4.90
4.0
0.413
0.618
0.189
0.153
0.468
0.417
0.622
0.193
0.157
0.472
11.9
12.0
12.1
16/18
L4940 SERIES
Table 8: Revision History
Date
Revision
Description of Changes
Add new package D PAK/A.
2
04-Feb-2005
6
17/18
L4940 SERIES
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
All other names are the property of their respective owners
© 2005 STMicroelectronics - All Rights Reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
18/18
相关型号：
©2020 ICPDF网 联系我们和版权申明