UTC LM2940L-XX-TQ2-R 1a low-dropout positive voltage regulator Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LM2940
LINEAR INTEGRATED CIRCUIT
1A LOW-DROPOUT POSITIVE
VOLTAGE REGULATOR
1
1
TO-263
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.
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
1
TO-220
1
1
TO-252
SOT-223
*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
Normal
Lead Free Plating
LM2940-xx-AA3- R
LM2940L-xx-AA3-R
LM2940-xx-TA3-T
LM2940L-xx-TA3-T
LM2940-xx-TN3-R
LM2940L-xx-TN3-R
LM2940-xx-TN3-T
LM2940L-xx-TN3-T
LM2940-xx-TQ2-R
LM2940L-xx-TQ2-R
LM2940-xx-TQ2-T
LM2940L-xx-TQ2-T
LM2940-xx-TQ3-R
LM2940L-xx-TQ3-R
LM2940-xx-TQ3-T
LM2940L-xx-TQ3-T
Note: 1.xx: output voltage, refer to Marking Information.
2.Pin Assignment: I: VIN G: GND O:VOUT
LM2940L-xx-AA3-R
Package
SOT-223
TO-220
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
Packing
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Tube
(1)Packing Type
(1) R: Tape Reel, T: Tube
(2)Package Type
(2) AA3: SOT-223, TA3: TO-220, TN3: TO-252,
TQ 2: TO-263, TQ3: TO-263-3
(3) xx: refer to Marking Information
(4) L: Lead Free Plating, Blank: Pb/Sn
(3)Output Voltage Code
(4)Lead Plating
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Copyright © 2005 Unisonic Technologies Co., Ltd
1 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
LM2940
SOT-223
TO-220
TO-252
TO-263
TO-263-3
10
12
15
50
80
90
VOLTAGE
CODE
:10V
:12V
:15V
: 5V
: 8V
: 9V
DATE CODE
1
2
3
UTC
LM2940
LEAD PLATING
VOLTAGECODE
DATE CODE
1
UNISONIC TECHNOLOGIES CO., LTD
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LEAD PLATING
2
3
2 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VIN
PD
TJ
RATINGS
UNIT
26
V
Internally limited
+150
°C
TO-220/TO-263-3/TO-263
-40 ~ +125
°C
Operating Temperature
TOPR
°C
SOT-223
-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.
Input Voltage
Power Dissipation
Junction Temperature
ELECTRICAL CHARACTERISTICS
(Ta=TJ =25°C, VIN=VOUT+5V, IOUT=1A and COUT=22µF, unless otherwise specified.)
For LM2940-5.0V
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
SYMBOL
VOUT
△VOUT
△VOUT
Ro
IQ
eN
RR
TEST CONDITIONS
6.25V ≤ 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
MIN
4.85
60
Long Term Stability
Dropout Voltage
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
TYP
5.00
20
35
35
10
150
72
MAX
5.15
50
50
15
20
ISC
TIN
VRIN
IOUT=1A
IOUT=100mA
(Note)
Ro=100Ω, T ≤ 100ms
Ro=100Ω
1.6
60
-15
0.5
0.11
1.9
75
-30
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
TEST CONDITIONS
9.4V ≤ 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
MIN
7.76
TYP
8.00
20
55
55
10
240
66
VD
0.8
0.15
UNIT
V
mV
mV
mΩ
mA
µVrms
dB
mV/
1000Hr
V
A
V
V
V
For LM2940-8.0V
PARAMETER
Output Voltage
Line regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
SYMBOL
VOUT
△VOUT
△VOUT
Ro
IQ
eN
RR
54
Long Term Stability
Dropout Voltage
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
15
32
ISC
TIN
VRIN
IOUT =1A
IOUT =100mA
(Note)
Ro=100Ω, T ≤ 100ms
Ro=100Ω
1.6
60
-15
0.5
0.11
1.9
75
-30
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
VD
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MAX
8.24
80
80
0.8
0.15
UNIT
V
mV
mV
mΩ
mA
µVrms
dB
mV/
1000Hr
V
A
V
V
V
3 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For LM2940-9.0V
PARAMETER
Output Voltage
Line regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
SYMBOL
VOUT
△VOUT
△VOUT
Ro
IQ
eN
RR
TEST CONDITIONS
10.5V ≤ 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
MIN
8.73
52
Long Term Stability
Dropout Voltage
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
TYP
9.00
20
60
60
10
270
64
MAX
9.27
90
90
15
34
ISC
TIN
VRIN
IOUT =1A
IOUT =100mA
(Note)
Ro=100Ω, T ≤ 100ms
Ro=100Ω
1.6
60
-15
0.5
0.11
1.9
75
-30
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
TEST CONDITIONS
11.5V ≤ 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
MIN
9.70
VD
0.8
0.15
UNIT
V
mV
mV
mΩ
mA
µVrms
dB
mV/
1000Hr
V
A
V
V
V
For LM2940-10V
PARAMETER
Output Voltage
Line regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
SYMBOL
VOUT
△VOUT
△VOUT
Ro
IQ
eN
RR
51
Long Term Stability
Dropout Voltage
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
ISC
TIN
VRIN
IOUT =1A
IOUT =100mA
(Note)
Ro=100Ω, T ≤ 100ms
Ro=100Ω
1.6
60
-15
VTRRI
Ro=100Ω, T ≤ 100ms
-50
VD
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TYP MAX UNIT
10.00 10.30
V
20
100
mV
65
100
mV
65
mΩ
10
15
mA
300
µVrms
63
dB
mV/
36
1000Hr
0.5
0.8
V
0.11
0.15
1.9
A
75
V
-30
V
-75
V
4 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
UTC LM2940-12V
PARAMETER
Output Voltage
Line regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
SYMBOL
VOUT
△VOUT
△VOUT
Ro
IQ
eN
RR
TEST CONDITIONS
13.6V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
50mA ≤ IOUT ≤ 1A
100 mADC and 20mArms, fo=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
fo=120Hz, 1Vrms, IOUT =100mA
Long Term Stability
Dropout Voltage
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input Voltage
Reverse Polarity Transient Input
Voltage
ISC
TIN
VRIN
IOUT =1A
IOUT =100mA
(Note)
Ro=100Ω, T ≤ 100ms
Ro=100Ω
VTRRI
Ro=100Ω, T≤100ms
VD
MIN
TYP MAX UNIT
11.64 12.00 12.36
V
20
120
mV
55
120
mV
80
mΩ
10
15
mA
360
µVrms
54
66
dB
mV/
48
1000Hr
0.5
0.8
V
0.11
0.15
1.6
1.9
A
60
75
V
-15
-30
V
-50
-75
V
UTC LM2940-15V
PARAMETER
Output Voltage
Line regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Ripple Rejection
SYMBOL
VOUT
△VOUT
△VOUT
Ro
IQ
eN
RR
TEST CONDITIONS
16.75V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
50mA ≤ IOUT ≤ 1A
100 mADC and 20mArms, fo=120Hz
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10Hz-100kHz, IOUT =5mA
fo=120Hz, 1Vrms, IOUT =100mA
Long Term Stability
Dropout Voltage
VD
IOUT =1A
IOUT =100mA
(Note)
Ro=100Ω, T ≤ 100ms
Ro=100Ω
MIN
TYP MAX UNIT
14.55 15.00 15.45
V
20
150
mV
70
150
mV
100
mΩ
10
15
mA
450
µVrms
52
64
dB
mV/
60
1000Hr
0.5
0.8
V
0.11
0.15
1.6
1.9
A
60
75
V
-15
-30
V
V
-50
-75
Short Circuit Current
ISC
Maximum Line Transient
TIN
Reverse Polarity DC Input Voltage
VRIN
Reverse Polarity Transient Input
Ro=100Ω, T ≤ 100ms
VTRRI
Voltage
Note: Output current will decrease with temperature increase but will not drop below 1A at the maximum specified
temperature.
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5 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION
VIN
LM2940-XX
C1
0.47μF
VOUT
+
IQ
COUT
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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6 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Dropout Voltage vs. Output Current
0.9
TJ=25℃
0.9
0.8
0.7
Dropout Voltage (V)
Input-Output Differential (V)
0.8
0.6
0.5
0.4
0.3
0.7
0.5
0.4
0.1
0.1
200
400
600
800
Output Current (mA)
500mA
0.3
0.2
0
1A
0.6
0.2
0
Dropout Voltage vs.Temperature
1.0
100mA
0
-40
1000
50
160
VIN=VOUT+5V
5.08
Quiescent Current (mA)
5.06
5.04
5.02
5.00
4.98
4.96
4.94
40
30
1A
20
500mA
10
10mA
4.92
4.90
-40
0
80
120
40
Temperature (℃)
0
-40
160
Quiescent Current vs. Input Voltage
200
Quiescent Current (mA)
140
120
100
80
100mA
60
40
1A
500mA
40
120
80
Temperature (℃)
160
VIN=14V
VOUT=5V
TJ=25℃
40
160
0
Quiescent Current vs. Load Current
50
180
Quiescent Current (mA)
40
120
80
Temperature (℃)
Quiescent Current vs. Temperature
Output Voltage vs. Temperature
5.10
Output Voltage (V)
0
30
20
10
20
0
0
5
25
10 15 20
Input Voltage (V)
30
35
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0
0
0.2
0.4
0.6
Load Current (A)
0.8
1.0
7 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
Line Transient Response
Output Voltage
Deviation (V)
30
20
10
0
-10
-20
-30
Load
Current (A)
Input Voltage
Change(V)
Output Voltage
Deviation(mV)
TYPICAL CHARACTERISTICS (Cont.)
3V
0V
-10
0
10
30 40
20
Time (μS)
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
V IN=10V
VoUT=5 V
COUT=22μF
TJ=25℃
1.0
0.5
0
-10
60
Ripple Rejection vs. Frequency
VIN=10V
VoUT=5 V
COUT=22μF
IoUT=10mA
Ripple Rejection (dB)
85
75
65
55
30
40
4.0
5.0
3.0
Input Voltage (V)
6.0
Low Voltage Behavior
5.0
Output Voltage (V)
95
10
20
Time (μS)
0
IoUT=1A
VoUT=5 V
TJ=25℃
4.0
3.0
2.0
45
35
1
2.0
Low Voltage Behavior
18
IoUT=1A
VoUT=9 V
15 TJ=25℃
IoUT=1A
VoUT=8 V
TJ=25℃
12
Output Voltage (V)
10
8
6
4
12
9
6
3
2
0
1.0
1.0
1K 10K 100K 1M
100
Frequency (Hz)
Low Voltage Behavior
14
Output Voltage (V)
10
0
0
2
4
6
8
10
Input Voltage (V)
12
14
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0
3
6
9
12
Input Voltage (V)
15
18
8 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
Low Voltage Behavior
18
Output Voltage (V)
Output Voltage (V)
IOUT=1A
V
OUT=10 V
15
TJ=25℃
12
9
6
3
0
0
3
6
9
12
Input Voltage (V)
15
Low Voltage Behavior
4
10
Output Voltage (V)
Output Voltage (V)
6
12
12
9
6
3
0
2
4
8
6
10
Input Voltage (V)
12
14
Output at Voltage Extremes
RO=100Ω
VOUT=5V
8
6
4
2
0
3
0
9
6
12
Input Voltage (V)
15
-2
-30
18
Output at Voltage Extremes
20
RO=100Ω
VoUT=8V
16
16
Output Voltage (V)
Output Voltage (V)
8
0
18
IOUT=1A
V
15 OUT=15 V
TJ=25℃
20
IOUT=1A
12 VOUT=12 V
TJ=25℃
10
2
18
0
Low Voltage Behavior
14
12
8
4
0
-4
-30
10
-20 -10
0
20
Input Voltage (V)
30
40
Output at Voltage Extremes
RO =100Ω
VoUT=9V
12
8
4
0
-20 -10
0
10
20
Input Voltage (V)
30
40
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-4
-30
-20 -10
10
20
0
Input Voltage (V)
30
40
9 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
Output at Voltage Extremes
Output Voltage (V)
20
Output at Voltage Extremes
20
RO=100Ω
VOUT=10V
15
10
5
12
8
4
0
0
-5
-30
Output Voltage (V)
20
10 20
-20 -10
0
Input Voltage (V)
30
-4
-30
40
100
RO=100Ω
VOUT=15V
15
10
5
30
40
COUT=22μF
VOUT=5V
10
1
STABLE
REGION
0.1
0
0.01
-5
10
0
-30 -20 -10
20
Input Voltage (V)
30
40
0
200
600
400
800
Output Current (mA)
Peak Output Current
3.0
1000
Output Impedance
10.00
Output Impedance (Ω)
VIN=14V
Output Current (A)
-20 -10
0
10
20
Input Voltage (V)
Output Capacitor ESR
Output at Voltage Extremes
Equivalent Series Resistance
( Ω)
25
RO=100Ω
VOUT=12V
16
Output Voltage (V)
25
2.0
1.0
VIN=10V
5.00 VOUT=5 V
COUT=22μF
2.00 IoUT=50mA
1.00
0.50
0.20
0.10
0.05
0.02
0
-40
0
40
80
120
160
Temperature ( ℃)
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0.01
1
10
100
1K
10K 100K
1M
Frequency (Hz)
10 of 11
QW-R102-016.E
LM2940
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
Maximum Power Dissipation (TO-220)
20
Power Dissipation (W)
18
16
14
12
10
8
6
4
Infinite Heatsink
Infinite Heatsink
10℃/W Heatsink
NO Heatsink
Power Dissipation (W)
22
Maximum Power Dissipation (TO-263-3)
4
3
2
1
θJA =32℃/W
θJA =37℃/W
θJA =50℃/W
θJA =73℃/W
NO Heatsink
2
0
0 10 20 30 40 50 60 70 80 90 100
0
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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