LM2940L-XX-TN3-R [UTC]
1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR; 1A低压差正电压稳压
| 型号： | LM2940L-XX-TN3-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | 1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR |
| 文件： | 总11页 (文件大小：154K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LM2940
LINEAR INTEGRATED CIRCUIT
1A LOW-DROPOUT POSITIVE
VOLTAGE REGULATOR
1
1
TO-263
1
TO-263-3
ꢀ
DESCRIPTION
The UTC LM2940 is a low dropout regulator designed to provide
output current up to 1A with a typically 500mV dropout Voltage and
a maximum of 1V. It is capable of reducing the ground current when
the differential between the input voltage and the output voltage
outrun 3V.
TO-220
UTC LM2940 offers low quiescent current (typically 30mA at 1A
and an input-output differential of 5V). Higher quiescent currents
only exist when the regulator is in the dropout mode (VIN-VOUT≤3V).
1
1
TO-252
SOT-223
ꢀ
FEATURES
*Pb-free plating product number: LM2940L
* 500mV typically dropout at 1A
* Output current in excess of 1A
* Low quiescent current
* Reversed-battery protection
* Current limit and thermal shutdown.
* Mirror image insertion protection
ꢀ ORDERING INFORMATION
Order Number
Pin Assignment
Packing
Package
Normal
Lead Free Plating
1
I
2
3
LM2940-xx-AA3- R
LM2940-xx-TA3-T
LM2940-xx-TN3-R
LM2940-xx-TN3-T
LM2940-xx-TQ2-R
LM2940-xx-TQ2-T
LM2940-xx-TQ3-R
LM2940-xx-TQ3-T
LM2940L-xx-AA3-R
LM2940L-xx-TA3-T
LM2940L-xx-TN3-R
LM2940L-xx-TN3-T
LM2940L-xx-TQ2-R
LM2940L-xx-TQ2-T
LM2940L-xx-TQ3-R
LM2940L-xx-TQ3-T
SOT-223
TO-220
TO-252
TO-252
TO-263
TO-263
TO-263-3
TO-263-3
G
G
G
G
G
G
G
G
O
O
O
O
O
O
O
O
Tape Reel
Tube
I
I
Tape Reel
Tube
I
I
Tape Reel
Tube
I
I
Tape Reel
Tube
I
Note: 1.xx: output voltage, refer to Marking Information.
2.Pin Assignment: I: VIN G: GND O:VOUT
LM2940L-xx-AA3-R
(1)Packing Type
(1) R: Tape Reel, T: Tube
(2) AA3: SOT-223, TA3: TO-220, TN3: TO-252,
TQ 2: TO-263, TQ3: TO-263-3
(2)Package Type
(3)Output Voltage Code
(4)Lead Plating
(3) xx: refer to Marking Information
(4) L: Lead Free Plating, Blank: Pb/Sn
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Copyright © 2005 Unisonic Technologies Co., Ltd
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
LM2940
LEAD PLATING
SOT-223
VOLTAGE
CODE
DATE CODE
10 :10V
12 :12V
15 :15V
50 : 5V
80 : 8V
90 : 9V
1
2
3
UTC
LM2940
TO-220
TO-252
TO-263
TO-263-3
LEAD PLATING
DATE CODE
VOLTAGECODE
1
2
3
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
26
UNIT
V
Input Voltage
VIN
PD
TJ
Power Dissipation
Junction Temperature
Internally limited
+150
°
°
°
°
C
C
C
C
TO-220/TO-263-3/TO-263
SOT-223
-40 ~ +125
-40 ~ +85
-65 ~ +150
Operating Temperature
TOPR
Storage temperature
TSTG
Note Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ꢀ
ELECTRICAL CHARACTERISTICS
(Ta=TJ =25
°
C, VIN=VOUT+5V, IOUT=1A and COUT=22
µ
F, unless otherwise specified.)
TEST CONDITIONS
For LM2940-5.0V
PARAMETER
SYMBOL
VOUT
MIN
4.85
TYP MAX UNIT
Output Voltage
6.25V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
5.00
20
5.15
50
V
mV
Line Regulation
△
△
VOUT VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA
VOUT 50mA ≤ IOUT ≤ 1A
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
35
50
mV
Ro
100 mA DC and 20mArms, fo=120Hz
VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA
10Hz-100kHz, IOUT=5mA
35
mΩ
IQ
10
15
mA
eN
RR
150
72
µVrms
dB
fo=120Hz, 1Vrms, IOUT=100mA
60
mV/
1000Hr
Long Term Stability
Dropout Voltage
20
IOUT=1A
0.5
0.11
1.9
75
0.8
VD
V
IOUT=100mA
(Note)
0.15
Short Circuit Current
ISC
TIN
1.6
60
A
V
V
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
Ro=100Ω, T ≤ 100ms
Ro=100Ω
VRIN
-15
-30
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
V
For LM2940-8.0V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
7.76
TYP MAX UNIT
Output Voltage
9.4V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
8.00
20
8.24
80
V
mV
Line regulation
△
△
VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT=5mA
VOUT 50mA ≤ IOUT ≤1A
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
55
80
mV
Ro
100 mA DC and 20mArms, fo=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
55
mΩ
IQ
10
15
mA
eN
RR
240
66
µVrms
dB
fo=120Hz, 1Vrms, IOUT =100mA
54
mV/
1000Hr
Long Term Stability
Dropout Voltage
32
IOUT =1A
0.5
0.11
1.9
75
0.8
VD
V
IOUT =100mA
(Note)
0.15
Short Circuit Current
ISC
TIN
1.6
60
A
V
V
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
Ro=100Ω, T ≤ 100ms
Ro=100Ω
VRIN
-15
-30
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
V
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
ELECTRICAL CHARACTERISTICS(Cont.)
For LM2940-9.0V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
8.73
TYP MAX UNIT
Output Voltage
10.5V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
9.00
20
9.27
90
V
mV
Line regulation
△
△
VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
VOUT 50mA ≤ IOUT ≤ 1A
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
60
90
mV
Ro
100 mA DC and 20mArms, fo=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
60
mΩ
IQ
10
15
mA
eN
RR
270
64
µVrms
dB
fo=120Hz, 1Vrms, IOUT =100mA
52
mV/
1000Hr
Long Term Stability
Dropout Voltage
34
IOUT =1A
0.5
0.11
1.9
75
0.8
VD
V
IOUT =100mA
(Note)
0.15
Short Circuit Current
ISC
TIN
1.6
60
A
V
V
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
Ro=100Ω, T ≤ 100ms
Ro=100Ω
VRIN
-15
-30
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
V
For LM2940-10V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
TYP MAX UNIT
Output Voltage
11.5V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
9.70 10.00 10.30
V
mV
Line regulation
△
△
VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
VOUT 50mA ≤ IOUT ≤ 1A
20
65
100
100
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
mV
Ro
100 mA DC and 20mArms, fo=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
65
mΩ
IQ
10
15
mA
eN
RR
300
63
µVrms
dB
fo=120Hz, 1Vrms, IOUT =100mA
51
mV/
1000Hr
Long Term Stability
Dropout Voltage
36
IOUT =1A
0.5
0.11
1.9
75
0.8
VD
V
IOUT =100mA
(Note)
0.15
Short Circuit Current
ISC
TIN
1.6
60
A
V
V
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
Ro=100Ω, T ≤ 100ms
Ro=100Ω
VRIN
-15
-30
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
V
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
ELECTRICAL CHARACTERISTICS(Cont.)
UTC LM2940-12V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
TYP MAX UNIT
Output Voltage
13.6V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
11.64 12.00 12.36
V
mV
Line regulation
△
△
VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
VOUT 50mA ≤ IOUT ≤ 1A
20
55
120
120
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
mV
Ro
100 mADC and 20mArms, fo=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
80
mΩ
IQ
10
15
mA
eN
RR
360
66
µVrms
dB
fo=120Hz, 1Vrms, IOUT =100mA
54
mV/
1000Hr
Long Term Stability
Dropout Voltage
48
IOUT =1A
0.5
0.11
1.9
75
0.8
VD
V
IOUT =100mA
(Note)
0.15
Short Circuit Current
ISC
TIN
1.6
60
A
V
V
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
Ro=100Ω, T ≤ 100ms
Ro=100Ω
VRIN
-15
-30
VTRRI
Ro=100Ω, T≤100ms
-50
-75
V
UTC LM2940-15V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
TYP MAX UNIT
Output Voltage
16.75V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A 14.55 15.00 15.45
V
mV
Line regulation
△
△
VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
VOUT 50mA ≤ IOUT ≤ 1A
20
70
150
150
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
mV
Ro
IQ
100 mADC and 20mArms, fo=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
100
10
mΩ
15
mA
eN
RR
450
64
µVrms
dB
fo=120Hz, 1Vrms, IOUT =100mA
52
mV/
1000Hr
Long Term Stability
Dropout Voltage
60
IOUT =1A
0.5
0.11
1.9
75
0.8
VD
V
IOUT =100mA
(Note)
0.15
Short Circuit Current
ISC
TIN
1.6
60
A
V
V
V
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
Ro=100Ω, T ≤ 100ms
Ro=100Ω
VRIN
-15
-30
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
Note: Output current will decrease with temperature increase but will not drop below 1A at the maximum specified
temperature.
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL APPLICATION
V
IN
V
OUT
LM2940-XX
+
COUT
C1
0.47μF
IQ
22μF
Note: 1.C1 is required if regulator is located far from power supply filter.
2.COUT must be higher than 22µF for stability, and locate as close as possible to the regulator.
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTICS
Dropout Voltage vs. Output Current
Dropout Voltage vs.Temperature
1.0
0.9
0.8
TJ
=25℃
0.9
0.8
0.7
0.6
0.5
0.7
0.6
1A
0.5
0.4
0.4
0.3
0.2
0.1
0
500mA
0.3
0.2
100mA
0.1
0
-40
0
200
400
600
800
0
40
Temperature(℃)
120
160
1000
80
Output Current(mA)
Output Voltage vs. Temperature
Quiescent Current vs. Temperature
5.10
5.08
5.06
5.04
5.02
50
40
V
IN=VOUT+5V
30
20
1A
5.00
4.98
4.96
500mA
10
0
4.94
4.92
4.90
10mA
40
-40
0
40
80
120
160
-40
0
80
120
160
Temperature(℃)
Temperature(℃)
Quiescent Current vs. Input Voltage
Quiescent Current vs. Load Current
50
40
30
20
10
0
200
VIN=14V
180
160
140
V
TJ
OUT=5V
=25℃
120
100
80
100mA
60
500mA
1A
40
20
0
0
5
10 15 20
25 30 35
0
0.2
0.4
Load Current(A)
0.6
0.8
1.0
Input Voltage (V)
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTICS (Cont.)
Line Transient Response
Load Transient Response
30
20
10
0
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
V
IN=10V
VoUT=5 V
OUT=22μF
C
T
J
=25℃
-10
-20
-30
1.0
3V
0V
0.5
0
-10
0
10
20
30 40 50 60
10
-10
0
20
30
40
Time (μS)
Time (μS)
Ripple Rejection vs. Frequency
Low Voltage Behavior
95
85
5.0
VIN=10V
IoUT=1A
VoUT=5 V
OUT=22μF
VoUT=5 V
T
J
=25℃
C
IoUT=10mA
4.0
3.0
75
65
55
2.0
1.0
45
35
10 100
1K 10K 100K 1M
1
1.0
2.0
3.0
4.0
5.0
6.0
Frequency (Hz)
Input Voltage (V)
Low Voltage Behavior
IoUT=1A
Low Voltage Behavior
18
15
14
12
10
8
IoUT=1A
VoUT=8 V
=25℃
VoUT=9 V
TJ
=25℃
T
J
12
9
6
6
3
0
4
2
0
0
2
4
6
8
10 12 14
0
3
6
9
12
15
18
Input Voltage (V)
Input Voltage (V)
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTICS (Cont.)
Low Voltage Behavior
Low Voltage Behavior
18
15
14
12
10
I
V
OUT=1A
OUT=10 V
TJ=25℃
I
V
T
OUT=1A
OUT=12 V
J=25℃
12
9
8
6
4
2
6
3
0
0
0
3
6
9
15
8
12
18
0
2
4
6
10 12 14
Input Voltage (V)
Input Voltage (V)
Low Voltage Behavior
Output at Voltage Extremes
O=100Ω
18
15
12
I
V
T
OUT=1A
R
V
OUT=5V
OUT=15 V
10
8
J=25℃
12
9
6
4
6
3
2
0
0
-2
3
9
0
6
12
15
18
10
-30 -20 -10
0
20 30 40
Input Voltage (V)
Input Voltage (V)
Output at Voltage Extremes
O=100Ω
Output at Voltage Extremes
20
16
12
20
16
12
R
RO
=100Ω
VoUT=9V
VoUT=8V
8
4
8
4
0
0
-4
-30
-4
-30
-20
0
10
20
-20
10
20 30
-10
30 40
-10
0
40
Input Voltage (V)
Input Voltage (V)
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTICS (Cont.)
Output at Voltage Extremes
RO=100Ω
Output at Voltage Extremes
25
20
15
20
RO=100Ω
VOUT=12V
VOUT=10V
16
12
8
4
10
5
0
0
-4
-30
-5
10
Input Voltage (V)
-20
0
10
-30 -20 -10
0
20 30 40
-10
20 30 40
Input Voltage (V)
Output Capacitor ESR
Output at Voltage Extremes
RO=100Ω
25
20
100
10
1
COUT=22μF
VOUT=5V
VOUT=15V
15
10
STABLE
REGION
5
0
0.1
0.01
-5
0
10
200
400
600
-30 -20 -10
20 30 40
0
800 1000
Input Voltage (V)
Output Current(mA)
Peak Output Current
Output Impedance
3.0
2.0
10.00
5.00
VIN=10V
VOUT=5 V
VIN=14V
COUT=22μF
IoUT=50mA
2.00
1.00
0.50
0.20
0.10
0.05
0.02
1.0
0
0.01
0
1
100
-40
40
80
120
160
10
1K 10K 100K 1M
Temperature( ℃)
Frequency (Hz)
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LM2940
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTICS (Cont.)
Maximum Power Dissipation (TO-220)
Infinite Heatsink
Maximum Power Dissipation(TO-263-3)
Infinite Heatsink
22
20
18
16
14
12
10
θJA=32℃/W
4
3
2
θJA=37℃/W
θJA=50℃/W
θJA=73℃/W
10℃/W Heatsink
8
6
1
0
4
NO Heatsink
NO Heatsink
2
0
0
10 20 30 40 50 60 70 80 90 100
0
10 20 30 40 50 60 70 80 90 100
Ambient Temperatire (℃)
Ambient Temperatire (℃)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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