ETL LM2940L-TF3-T 1a low-dropout positive voltage regulator Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LM2940
LINEAR INTEGRATED CIRCUIT
1A LOW-DROPOUT POSITIVE
VOLTAGE REGULATOR

1
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.
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).

FEATURES
* 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
Ordering Number
Lead Free
Halogen Free
LM2940L-xx-AA3-R
LM2940G-xx-AA3-R
LM2940L-xx-TA3-T
LM2940G-xx-TA3-T
LM2940L-xx-TF3-T
LM2940G-xx-TF3-T
LM2940L-xx-TN3-R
LM2940G-xx-TN3-R
LM2940L-xx-TN3-T
LM2940G-xx-TN3-T
LM2940L-xx-TQ2-R
LM2940G-xx-TQ2-R
LM2940L-xx-TQ2-T
LM2940G-xx-TQ2-T
LM2940L-xx-TQ3-R
LM2940G-xx-TQ3-R
LM2940L-xx-TQ3-T
LM2940G-xx-TQ3-T
Note: 1. xx: Output Voltage, refer to Marking Information.
2. Pin Assignment: I: VIN G: GND O:VOUT
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
Package
SOT-223
TO-220
TO-220F
TO-252
TO-252
TO-263
TO-263
TO-263-3
TO-263-3
Pin Assignment
1
2
3
I
G
O
I
G
O
I
G
O
I
G
O
I
G
O
I
G
O
I
G
O
I
G
O
I
G
O
Packing
Tape Reel
Tube
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Tube
1 of 12
QW-R102-016.M
LM2940

LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
SOT-223
TO-220
TO-252
TO-263
TO-263-3
VOLTAGE CODE
MARKING
50 : 5V
60 : 6V
80 : 8V
90 : 9V
10 :10V
12 :12V
15 :15V
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2 of 12
QW-R102-016.M
LM2940

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
26
V
Power Dissipation
PD
Internally limited
Junction Temperature
TJ
+150
C
TO-220/TO-220F
-40 ~ +125
Ambient Operating
TO-263-3/TO-263
TOPR
C
Temperature
SOT-223/ TO-252
-40 ~ +85
Storage Temperature
TSTG
-65 ~ +150
C
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.

THERMAL DATA
PARAMETER
SOT-223
TO-220/TO-220F
Junction to Ambient
TO-263/TO-263-3
TO-252
TO-220/TO-263
TO-263-3
TO-220F
Junction to Case
TO-252
SOT-223

SYMBOL
θJA
RATING
174
60
80
125
UNIT
C/W
4
θJC
C/W
6
12
15
ELECTRICAL CHARACTERISTICS
(TA=TJ =25C, VIN=VOUT+5V, IOUT=1A and COUT=22μF, unless otherwise specified.)
For LM2940-5.0V
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT
6.25V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
Line Regulation
△VOUT VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA
Load Regulation
△VOUT 50mA ≤ IOUT ≤ 1A
Output Impedance
ROUT
100 mA DC and 20mARMS, fO=120Hz
Quiescent Current
IQ
VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA
Output Noise Voltage
eN
10Hz-100kHz, IOUT=5mA
Ripple Rejection
RR
fO=120Hz, 1VRMS, IOUT=100mA
Long Term Stability
IOUT=1A
Dropout Voltage
VD
IOUT=100mA
Short Circuit Current
ISC
(Note)
Maximum Line Transient
TIN
ROUT=100Ω, T ≤ 100ms
Reverse Polarity DC Input Voltage
VRIN
ROUT=100Ω
Reverse Polarity Transient
VTRRI
ROUT=100Ω, T ≤ 100ms
Input Voltage
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
4.85
60
-15
TYP
5.00
20
35
35
10
150
72
20
0.5
0.13
2.5
75
-30
-50
-75
54
MAX
5.15
50
50
15
UNIT
V
mV
mV
mΩ
mA
μVRMS
dB
mV/1000Hr
0.8
0.15
V
A
V
V
V
3 of 12
QW-R102-016.M
LM2940

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For LM2940-6.0V
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
Long Term Stability
SYMBOL
VOUT
△VOUT
△VOUT
ROUT
IQ
eN
RR
Dropout Voltage
VD
TEST CONDITIONS
7.5V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA
50mA ≤ IOUT ≤ 1A
100 mA DC and 20mARMS, fO=120Hz
VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA
10Hz-100kHz, IOUT=5mA
fO=120Hz, 1VRMS, IOUT=100mA
IOUT=1A
IOUT=100mA
(Note)
ROUT=100Ω, T ≤ 100ms
ROUT=100Ω
Short Circuit Current
ISC
Maximum Line Transient
TIN
Reverse Polarity DC Input Voltage
VRIN
Reverse Polarity Transient Input
VTRRI
ROUT=100Ω, T ≤ 100ms
Voltage
For LM2940-8.0V
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT
9.4V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
Line regulation
△VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT=5mA
Load Regulation
△VOUT 50mA ≤ IOUT ≤1A
Output Impedance
ROUT
100 mA DC and 20mARMS, fO=120Hz
Quiescent Current
IQ
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Output Noise Voltage
eN
10Hz-100kHz, IOUT =5mA
Ripple Rejection
RR
fO=120Hz, 1VRMS, IOUT =100mA
Long Term Stability
IOUT =1A
Dropout Voltage
VD
IOUT =100mA
Short Circuit Current
ISC
(Note)
Maximum Line Transient
TIN
ROUT=100Ω, T ≤ 100ms
Reverse Polarity DC Input Voltage
VRIN
ROUT=100Ω
Reverse Polarity Transient Input
VTRRI
ROUT=100Ω, T ≤ 100ms
Voltage
For LM2940-9.0V
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT
10.5V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
Line regulation
△VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Load Regulation
△VOUT 50mA ≤ IOUT ≤ 1A
Output Impedance
ROUT
100 mA DC and 20mARMS, fO=120Hz
Quiescent Current
IQ
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Output Noise Voltage
eN
10Hz-100kHz, IOUT =5mA
Ripple Rejection
RR
fO=120Hz, 1VRMS, IOUT =100mA
Long Term Stability
IOUT =1A
Dropout Voltage
VD
IOUT =100mA
Short Circuit Current
ISC
(Note)
Maximum Line Transient
TIN
ROUT=100Ω, T ≤ 100ms
Reverse Polarity DC Input Voltage
VRIN
ROUT=100Ω
Reverse Polarity Transient Input
VTRRI
ROUT=100Ω, T ≤ 100ms
Voltage
UNISONIC TECHNOLOGIES CO., LTD
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MIN
5.82
60
-15
TYP
6.00
20
40
40
10
180
72
20
0.5
0.13
2.5
75
-30
-50
-75
MIN
7.76
60
-15
TYP
8.00
20
55
55
10
240
66
32
0.5
0.13
2.5
75
-30
-50
-75
MIN
8.73
60
-15
TYP
9.00
20
60
60
10
270
64
34
0.5
0.13
2.5
75
-30
-50
-75
60
54
52
MAX
6.18
60
60
15
UNIT
V
mV
mV
mΩ
mA
μVRMS
dB
mV/1000Hr
0.8
0.15
V
A
V
V
V
MAX
8.24
80
80
15
UNIT
V
mV
mV
mΩ
mA
μVRMS
dB
mV/1000Hr
0.8
0.15
V
A
V
V
V
MAX
9.27
90
90
15
UNIT
V
mV
mV
mΩ
mA
μVRMS
dB
mV/1000Hr
0.8
0.15
V
A
V
V
V
4 of 12
QW-R102-016.M
LM2940

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For LM2940-10V
PARAMETER
Output Voltage
Line regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
Long Term Stability
SYMBOL
VOUT
△VOUT
△VOUT
ROUT
IQ
eN
RR
Dropout Voltage
VD
TEST CONDITIONS
11.5V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
50mA ≤ IOUT ≤ 1A
100mA DC and 20mARMS, fO=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
fO=120Hz, 1VRMS, IOUT =100mA
IOUT =1A
IOUT =100mA
(Note)
ROUT=100Ω, T ≤ 100ms
ROUT=100Ω
Short Circuit Current
ISC
Maximum Line Transient
TIN
Reverse Polarity DC Input Voltage
VRIN
Reverse Polarity Transient Input
VTRRI
ROUT=100Ω, T ≤ 100ms
Voltage
UTC LM2940-12V
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT
13.6V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
Line regulation
△VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Load Regulation
△VOUT 50mA ≤ IOUT ≤ 1A
Output Impedance
ROUT
100mA DC and 20mARMS, fO=120Hz
Quiescent Current
IQ
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Output Noise Voltage
eN
10Hz-100kHz, IOUT =5mA
Ripple Rejection
RR
fO=120Hz, 1VRMs, IOUT =100mA
Long Term Stability
IOUT =1A
Dropout Voltage
VD
IOUT =100mA
Short Circuit Current
ISC
(Note)
Maximum Line Transient
TIN
ROUT=100Ω, T ≤ 100ms
Reverse Polarity DC Input Voltage
VRIN
ROUT=100Ω
Reverse Polarity Transient Input
VTRRI
ROUT=100Ω, T ≤ 100ms
Voltage
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
9.70
60
-15
TYP
10.00
20
65
65
10
300
63
36
0.5
0.13
2.5
75
-30
-50
-75
MIN
11.64
60
-15
TYP
12.00
20
55
80
10
360
66
48
0.5
0.11
2.5
75
-30
-50
-75
51
54
MAX
10.30
100
100
15
UNIT
V
mV
mV
mΩ
mA
μVRMS
dB
mV/1000Hr
0.8
0.15
V
A
V
V
V
MAX
12.36
120
120
15
UNIT
V
mV
mV
mΩ
mA
μVRMS
dB
mV/1000Hr
0.8
0.15
V
A
V
V
V
5 of 12
QW-R102-016.M
LM2940

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
UTC LM2940-15V
PARAMETER
Output Voltage
Line regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
Long Term Stability
SYMBOL
VOUT
△VOUT
△VOUT
ROUT
IQ
eN
RR
Dropout Voltage
VD
TEST CONDITIONS
16.75V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
50mA ≤ IOUT ≤ 1A
100mA DC and 20mARMS, fO=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
fO=120Hz, 1VRMS, IOUT =100mA
IOUT =1A
IOUT =100mA
(Note)
ROUT=100Ω, T ≤ 100ms
ROUT=100Ω
Short Circuit Current
ISC
Maximum Line Transient
TIN
Reverse Polarity DC Input Voltage
VRIN
Reverse Polarity Transient Input
VTRRI
ROUT=100Ω, T ≤ 100ms
Voltage
Note: Output current will decrease with temperature increase but will not drop below
temperature.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
14.55
60
-15
TYP
15.00
20
70
100
10
450
64
60
0.5
0.11
2.5
75
-30
-50
-75
52
MAX
15.45
150
150
15
UNIT
V
mV
mV
mΩ
mA
μVRMS
dB
mV/1000Hr
0.8
0.15
V
A
V
V
V
1A at the maximum specified
6 of 12
QW-R102-016.M
LM2940

LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION
Note: 1. C1 is required if regulator is located far from power supply filter.
2. CO must be higher than 22μF for stability, and locate as close as possible to the regulator.
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7 of 12
QW-R102-016.M
LM2940
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Input-Output Differential (V)
0.9
Dropout Voltage vs. Output Current
TJ=25°С
0.8
0.9
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
200
0.8
0.7
1A
0.6
0.5
0.4
500mA
0.3
0.2
0.1
0
-40
400 600
800 1000
Output Current (mA)
Output Voltage vs. Temperature
5.10
Dropout Voltage vs.Temperature
1.0
Dropout Voltage (V)

50
Quiescent Current (mA)
Output Voltage (V)
5.04
5.02
5.00
4.98
4.96
4.94
0
40
120
80
Temperature (°С)
VIN=VOUT+5V
40
30
1A
20
500mA
10
10mA
4.92
4.90
40
80
120
Temperature (°С)
Quiescent Current vs. Input Voltage
180
160
140
120
100
80
100mA
60
40
20
0
0
-40
160
1A
0
5
500mA
10 15 20 25
Input Voltage (V)
30
35
UNISONIC TECHNOLOGIES CO., LTD
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50
Quiescent Current (mA)
Quiescent Current (mA)
0
-40
200
160
Quiescent Current vs. Temperature
5.08
5.06
100mA
0
40
80
120
Temperature (°С)
160
Quiescent Current vs. Load Current
VIN=14V
VOUT=5V
TJ=25°С
40
30
20
10
0
0
0.2
0.4
0.8
0.6
Load Current (A)
1.0
8 of 12
QW-R102-016.M
LM2940
Line Transient Response
30
20
Output Voltage
Deviation (V)
Output Voltage
Deviation(mV)
TYPICAL CHARACTERISTICS (Cont.)
10
0
-10
-20
Load
Current (A)
Input Voltage
Change(V)
-30
3V
0V
-10
0
10
30
20
Time (μS)
40
50
Load Transient Response
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
VIN=10V
VoUT=5 V
COUT=22μF
TJ=25°С
1.0
0.5
0
-10
60
75
Output Voltage (V)
Ripple Rejection (dB)
85
65
55
30
40
4.0
3.0
5.0
Input Voltage (V)
6.0
Low Voltage Behavior
5.0
VIN=10V
VoUT=5 V
COUT=22μF
IoUT=10mA
10
20
Time (μS)
0
Ripple Rejection vs. Frequency
95
IoUT=1A
VoUT=5 V
TJ=25°С
4.0
3.0
2.0
45
35
1
10
100
1K
10K 100K
1.0
1.0
1M
2.0
Frequency (Hz)
Low Voltage Behavior
14
Low Voltage Behavior
18
IoUT=1A
VoUT=8 V
TJ=25°С
12
IoUT=1A
VoUT=9 V
TJ=25°С
15
10
Output Voltage (V)
Output Voltage (V)

LINEAR INTEGRATED CIRCUIT
8
6
4
12
9
6
3
2
0
0
0
2
4
8
6
10
Input Voltage (V)
12
14
UNISONIC TECHNOLOGIES CO., LTD
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0
3
6
9
12
Input Voltage (V)
15
18
9 of 12
QW-R102-016.M
LM2940
Output Voltage (V)
Output Voltage (V)
Output Voltage (V)
Output Voltage (V)
TYPICAL CHARACTERISTICS (Cont.)
Output Voltage (V)
Output Voltage (V)

LINEAR INTEGRATED CIRCUIT
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10 of 12
QW-R102-016.M
LM2940

LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
Output at Voltage Extremes
Output at Voltage Extremes
25
20
20
ROUT=100Ω
VOUT=10V
16
15
12
10
8
5
4
0
0
-5
-30
10
0
20
-10
Input Voltage (V)
-20
30
40
20
-4
-30
-20
0
10
-10
20
Input Voltage (V)
30
40
Output Capacitor ESR
Output at Voltage Extremes
25
ROUT=100Ω
VOUT=12V
100
ROUT=100Ω
VOUT=15V
COUT=22μF
VOUT=5V
10
15
1
10
STABLE
REGION
5
0.1
0
-5
-30
0.01
0
10
-10
20
Input Voltage (V)
-20
30
40
0
400
200
600
800
Output Current (mA)
1000
Output Impedance
Peak Output Current
3.0
10.00
VIN=10V
5.00 VOUT=5 V
COUT=22μF
2.00 IoUT=50mA
VIN=14V
2.0
1.00
0.50
0.20
0.10
1.0
0.05
0.02
0
-40
0
40
80
120
160
Temperature (°С)
UNISONIC TECHNOLOGIES CO., LTD
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0.01
1
10
100
1K
10K
100K
1M
Frequency (Hz)
11 of 12
QW-R102-016.M
LM2940

LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
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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12 of 12
QW-R102-016.M
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