LM2940-12(TO-263-3) [UTC]
Regulator, 1 Output, BIPolar,;
| 型号： | LM2940-12(TO-263-3) |
| 厂家： | 
Unisonic Technologies |
| 描述： | Regulator, 1 Output, BIPolar, |
| 文件： | 总10页 (文件大小：166K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UTC LM2940 LINEAR INTEGRATED CIRCUIT
1A LOW-DROPOUT VOLTAGE
REGULATOR
1
1
DESCRIPTION
TO-263-3
TO-220
The UTC LM2940 is a positive voltage regulator features
the ability to source 1A of output current with a dropout
voltage of typically 0.5V and a maximum of 1V over the entire
temperature range. Furthermore,
a
quiescent current
reduction circuit has been included which reduces the ground
current when the differential between the input voltage and the
output voltage exceeds approximately 3V.The quiescent
current with 1A of output current and an input-output
differential of 5V is therefore only 30mA.Higher quiescent
currents only exist when the regulator is in the dropout mode
(VIN-VOUT≤3V).
1
SOT-223
Designed also for vehicular applications, the UTC LM2940
is protected from reverse battery installations or 2-battery
jumps. During line transients, such as load dump when the
input voltage can momentarily exceed the specified maximum
operating voltage, the regulator will automatically shut down to
protect both the internal circuits and the load. The UTC
LM2940 cannot be harmed by temporary mirror-image
insertion. Familiar regulator features such as short circuit and
thermal overload protection are also provided.
SOP-16
DIP-16
1: VIN
2: GND
3: VOUT
FEATURES
*Dropout voltage typically 0.5V @Io=1A
*Output current in excess of 1A
*Output voltage trimmed before assembly
*Reverse battery protection
*Internal short circuit current limit
*Mirror image insertion protection
*P+ Product Enhancement tested.
PIN CONFIGURATIONS (16 PIN)
VIN
16
NC
15
GND GND GND GND
NC
10
NC
9
14
13
12
11
1
2
3
4
5
6
7
8
NC
NC
VOUT
NC
GND
NC
NC
NC
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION
LM2940-XX
IQ
VIN
VOUT
+
COUT**
22μF
C1*
0.47μF
*Required if regulator is located far from power supply filter.
**COUT must be at least 22µF to maintain stability. May be increased without bound to maintain regulation during
transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating
temperature range as the regulator and the ESR is critical.
ABSOLUTE MAXIMUM RATINGS (Note 1)
PARAMETER
SYMBOL
VALUE
26
UNIT
V
Input Voltage
VIN
Internal Power Dissipation (note 2)
Operating temperature
TO-220/TO-263-3
Internally limited
Topr
-40 ~ +125
-40 ~ +85
-55 ~ +125
-65 ~ +150
150
°C
SOT-223
DIP/SOP
Storage temperature
Maximum Junction Temperature
ESD Susceptibility (note 3)
Tstg
Tj
°C
°C
kV
2
UTC LM2940-5.0V ELECTRICAL CHARACTERISTICS
(TA=Tj =25°C,VIN=Vo+5V,IO=1A and CO=22µF, unless otherwise specified )
PARAMETER
SYMBOL
TEST CONDITIONS
6.25V≤VIN≤26V, 5mA≤Io≤1A
MIN TYP MAX
UNIT
V
Output Voltage
Vo
4.85
5.00
5.15
△Vo
△Vo
Ro
Line regulation
Vo+2V≤VIN≤26V, IO=5mA
50mA≤IO≤1A
100 mADC and 20mArms, fo=120Hz
Vo+2V≤VIN≤26V, IO=5mA
VIN= Vo+5V, IO=1A
10Hz-100kHz, IO=5mA
fo=120Hz, 1Vrms, IO=100mA
20
35
35
10
30
150
72
20
50
50
mV
mV
mΩ
Load Regulation
Output Impedance
Quiescent Current
15
45
IQ
mA
Output Noise Voltage
Ripple Rejection
Long Term Stability
VNOISE
RR
µVrms
dB
mV/
1000Hr
60
Dropout Voltage
IO=1A
IO=100mA
(note 4)
Ro=100Ω, T≤100ms
Ro=100Ω
0.5
0.11
1.9
75
0.8
0.15
Vd
V
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input
Voltage
IS
TIN
VRIN
1.6
60
-15
A
V
V
-30
Reverse Polarity Transient
Input Voltage
VTRRI
Ro=100Ω, T≤100ms
-50
-75
V
UTC UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
UTC LM2940-8.0V ELECTRICAL CHARACTERISTICS
(TA=Tj =25°C,VIN=Vo+5V,IO=1A and CO=22µF, unless otherwise specified )
PARAMETER
SYMBOL
TEST CONDITIONS
9.4V≤VIN≤26V, 5mA≤Io≤1A
MIN TYP MAX
UNIT
V
Output Voltage
Vo
7.76
8.00
8.24
△Vo
△Vo
Ro
Line regulation
Vo+2V≤VIN≤26V, IO=5mA
50mA≤IO≤1A
100 mADC and 20mArms, fo=120Hz
Vo+2V≤VIN≤26V, IO=5mA
VIN= Vo+5V, IO=1A
10Hz-100kHz, IO=5mA
fo=120Hz, 1Vrms, IO=100mA
20
55
55
10
30
240
66
32
80
80
mV
mV
mΩ
Load Regulation
Output Impedance
Quiescent Current
15
45
IQ
mA
Output Noise Voltage
Ripple Rejection
Long Term Stability
VNOISE
RR
µVrms
dB
mV/
1000Hr
54
Dropout Voltage
IO=1A
IO=100mA
(note 4)
Ro=100Ω, T≤100ms
Ro=100Ω
0.5
0.11
1.9
75
0.8
0.15
Vd
V
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input
Voltage
IS
TIN
VRIN
1.6
60
-15
A
V
V
-30
Reverse Polarity Transient
Input Voltage
VTRRI
Ro=100Ω, T≤100ms
-50
-75
V
UTC LM2940-9.0V ELECTRICAL CHARACTERISTICS
(TA=Tj =25°C,VIN=Vo+5V,IO=1A and CO=22µF, unless otherwise specified )
PARAMETER
Output Voltage
SYMBOL
Vo
TEST CONDITIONS
10.5V≤VIN≤26V, 5mA≤Io≤1A
MIN TYP MAX
UNIT
V
8.73
9.00
9.27
△Vo
△Vo
Ro
Line regulation
Vo+2V≤VIN≤26V, IO=5mA
50mA≤IO≤1A
100 mADC and 20mArms, fo=120Hz
Vo+2V≤VIN≤26V, IO=5mA
VIN= Vo+5V, IO=1A
10Hz-100kHz, IO=5mA
fo=120Hz, 1Vrms, IO=100mA
20
60
60
10
30
270
64
34
90
90
mV
mV
mΩ
Load Regulation
Output Impedance
Quiescent Current
15
45
IQ
mA
Output Noise Voltage
Ripple Rejection
Long Term Stability
VNOISE
RR
µVrms
dB
mV/
1000Hr
52
Dropout Voltage
IO=1A
IO=100mA
(note 4)
Ro=100Ω, T≤100ms
Ro=100Ω
0.5
0.11
1.9
75
0.8
0.15
Vd
V
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input
Voltage
IS
TIN
VRIN
1.6
60
-15
A
V
V
-30
Reverse Polarity Transient
Input Voltage
VTRRI
Ro=100Ω, T≤100ms
-50
-75
V
UTC UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
UTC LM2940-10V ELECTRICAL CHARACTERISTICS
(TA=Tj =25°C,VIN=Vo+5V,IO=1A and CO=22µF, unless otherwise specified )
PARAMETER
SYMBOL
TEST CONDITIONS
11.5V≤VIN≤26V, 5mA≤Io≤1A
MIN TYP MAX
9.70 10.00 10.30
UNIT
V
Output Voltage
Vo
△Vo
△Vo
Ro
Line regulation
Vo+2V≤VIN≤26V, IO=5mA
50mA≤IO≤1A
100 mADC and 20mArms, fo=120Hz
Vo+2V≤VIN≤26V, IO=5mA
VIN= Vo+5V, IO=1A
10Hz-100kHz, IO=5mA
fo=120Hz, 1Vrms, IO=100mA
20
65
65
10
30
300
63
36
100
100
mV
mV
mΩ
Load Regulation
Output Impedance
Quiescent Current
15
45
IQ
mA
Output Noise Voltage
Ripple Rejection
Long Term Stability
VNOISE
RR
µVrms
dB
mV/
1000Hr
51
Dropout Voltage
IO=1A
IO=100mA
(note 4)
Ro=100Ω, T≤100ms
Ro=100Ω
0.5
0.11
1.9
75
0.8
0.15
Vd
V
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input
Voltage
IS
TIN
VRIN
1.6
60
-15
A
V
V
-30
Reverse Polarity Transient
Input Voltage
VTRRI
Ro=100Ω, T≤100ms
-50
-75
V
UTC LM2940-12V ELECTRICAL CHARACTERISTICS
(TA=Tj =25°C,VIN=Vo+5V,IO=1A and CO=22µF, unless otherwise specified )
PARAMETER
Output Voltage
SYMBOL
Vo
TEST CONDITIONS
13.6V≤VIN≤26V, 5mA≤Io≤1A
MIN TYP MAX
11.64 12.00 12.36
UNIT
V
△Vo
△Vo
Ro
Line regulation
Vo+2V≤VIN≤26V, IO=5mA
50mA≤IO≤1A
100 mADC and 20mArms, fo=120Hz
Vo+2V≤VIN≤26V, IO=5mA
VIN= Vo+5V, IO=1A
10Hz-100kHz, IO=5mA
fo=120Hz, 1Vrms, IO=100mA
20
55
80
10
30
360
66
48
120
120
mV
mV
mΩ
Load Regulation
Output Impedance
Quiescent Current
15
45
IQ
mA
Output Noise Voltage
Ripple Rejection
Long Term Stability
VNOISE
RR
µVrms
dB
mV/
1000Hr
54
Dropout Voltage
IO=1A
IO=100mA
(note 4)
Ro=100Ω, T≤100ms
Ro=100Ω
0.5
0.11
1.9
75
0.8
0.15
Vd
V
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input
Voltage
IS
TIN
VRIN
1.6
60
-15
A
V
V
-30
Reverse Polarity Transient
Input Voltage
VTRRI
Ro=100Ω, T≤100ms
-50
-75
V
UTC UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
UTC LM2940-15V ELECTRICAL CHARACTERISTICS
(TA=Tj =25°C,VIN=Vo+5V,IO=1A and CO=22µF, unless otherwise specified )
PARAMETER
SYMBOL
TEST CONDITIONS
16.75V≤VIN≤26V, 5mA≤Io≤1A
MIN TYP MAX
14.55 15.00 15.45
UNIT
V
Output Voltage
Vo
△Vo
△Vo
Ro
Line regulation
Vo+2V≤VIN≤26V, IO=5mA
50mA≤IO≤1A
100 mADC and 20mArms, fo=120Hz
Vo+2V≤VIN≤26V, IO=5mA
VIN= Vo+5V, IO=1A
20
70
100
10
150
150
mV
mV
mΩ
Load Regulation
Output Impedance
Quiescent Current
15
45
IQ
mA
30
Output Noise Voltage
Ripple Rejection
Long Term Stability
VNOISE
RR
10Hz-100kHz, IO=5mA
fo=120Hz, 1Vrms, IO=100mA
450
64
60
µVrms
dB
mV/
1000Hr
52
Dropout Voltage
IO=1A
IO=100mA
(note 4)
Ro=100Ω, T≤100ms
Ro=100Ω
0.5
0.11
1.9
75
0.8
0.15
Vd
V
Short Circuit Current
Maximum Line Transient
Reverse Polarity DC Input
Voltage
IS
TIN
VRIN
1.6
60
-15
A
V
V
-30
Reverse Polarity Transient
Input Voltage
VTRRI
Ro=100Ω, T≤100ms
-50
-75
V
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions
are conditions under which the device functions but the specifications might not be guaranteed. For
guaranteed specifications and test conditions see the Electrical Characteristics.
Note 2: The maximum allowable power dissipation is a function of the maximum junction temperature, Tj, the
junction to ambient thermal resistance, θJ-A, and the ambient temperature, TA .Exceeding the maximum
allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal
shutdown. The value of θJ-A(for devices in still air with no heatsink) is 60°C/W for the TO-220
package ,80°C/W for the TO-263-3 package, and 174°C/W for SOT-223 package. The effective value of
θJ-A can be reduced by using a heatsink.
Note 3: ESD rating is based on the human body model,100pF discharged through 1.5kΩ.
Note 4: Output current will decrease with increasing temperature but will not drop below 1A at the maximum
specified temperature.
UTC UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage
Dropout Voltage vsTemperature
1.0
0.9
0.8
Tj=25℃
0.9
0.8
0.7
0.7
0.6
1A
0.6
0.5
0.4
0.3
0.2
0.1
0
0.5
0.4
500mA
0.3
0.2
100mA
0.1
0
-40
0
200
400
600
800
40
Temperature(℃)
0
120
160
160
1.0
1000
160
35
80
Output Current (mA)
Output Voltage vs Temperature
Quiescent Current vs Temperature
VIN=VO+5V
5.10
5.08
5.06
5.04
5.02
50
40
30
20
1A
5.00
4.98
4.96
500mA
10
0
4.94
4.92
4.90
10mA
0
-40
40
80
120
-40
0
40
80
120
Temperature(℃)
Temperature(℃)
Quiescent Current
Quiescent Current
50
40
30
200
VIN=14V
VO=5V
Tj=25℃
180
160
140
120
100
80
20
10
0
100mA
60
500mA
30
40
1A
20
0
15
20
0
5
10
25
0
0.2
0.4
Load Current (A)
0.6
0.8
Input Voltage (V)
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
Line Transient Response
Load Transient Response
0.5
0.4
0.3
0.2
30
20
10
0
-10
-20
-30
VIN=10V
Vo=5 V
COUT=22μF
0.1
0
Tj=25℃
-0.1
-0.2
-0.3
-0.4
-0.5
1.0
3V
0V
0.5
0
50 60
10
0
20
30 40
-10
0
10
20
30
40
-10
Time (μS)
Time (μS)
Ripple Rejection
Low Voltage Behavior
95
85
75
5.0
VIN=10V
Vo=5 V
Io=1A
Vo=5 V
Tj=25℃
COUT=22μF
Io=10mA
4.0
3.0
65
55
2.0
1.0
45
35
10
1K 10K 100K 1M
Frequency (Hz)
100
1
6.0
1.0
2.0
3.0
4.0
5.0
Input Voltage (V)
Low Voltage Behavior
Low Voltage Behavior
18
15
14
12
10
8
Io=1A
Io=1A
Vo=8 V
Tj=25℃
Vo=9 V
Tj=25℃
12
9
6
6
3
4
2
0
0
8
0
3
6
15
0
2
4
6
10 12
14
9
12
18
Input Voltage (V)
Input Voltage (V)
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
Low Voltage Behavior
Low Voltage Behavior
18
14
12
10
8
Io=1A
Io=1A
15
Vo=12V
Tj=25℃
Vo=10 V
Tj=25℃
12
9
6
6
3
4
2
0
0
3
6
9
0
15
8
12
18
0
2
4
6
10 12 14
Input Voltage (V)
Input Voltage (V)
Low Voltage Behavior
Output at Voltage Extremes
12
18
15
RL=100Ω
Io=1A
10
8
Vo=5V
Vo=15 V
Tj=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
Output at Voltage Extremes
20
16
12
20
RL=100Ω
Vo=8V
RL=100Ω
Vo=9V
16
12
8
4
8
4
0
0
-4
-4
-20
0
20
-20
20 30
Input Voltage (V)
10
10
-30
-10
30 40
-30
-10
0
40
Input Voltage (V)
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
Output at Voltage Extremes
Output at Voltage Extremes
25
20
16
12
8
RL=100Ω
Vo=10V
RL=100Ω
Vo=12V
20
15
10
4
5
0
0
-4
-5
-20
0
10
Input Voltage (V)
10
-30
-30
-20 -10
0
20 30 40
-10
20 30 40
Input Voltage (V)
Output Capacitor ESR
COUT=22μF
Output at Voltage Extremes
100
10
1
25
20
RL=100Ω
Vo=15V
Vo=5V
15
10
STABLE
REGION
5
0
0.1
0.01
-5
0
200
400
10
600
-30 -20 -10
20 30 40
0
800 1000
Input Voltage (V)
Output Current (mA)
Output Impedance
Peak Output Current
3.0
2.0
10.00
5.00
VIN=10V
Vo=5 V
VIN=14V
COUT=22μF
2.00
Io=50mA
1.00
0.50
0.20
0.10
0.05
0.02
1.0
0
0.01
0
-40
1
10
100
1K 10K 100K 1M
40
80
120
160
Temperature (℃)
Frequency (Hz)
UTC UNISONIC TECHNOLOGIES CO., LTD.
9
QW-R102-016,A
UTC LM2940 LINEAR INTEGRATED CIRCUIT
Maximum Power Dissipation (TO-220)
Maximum Power Dissipation (TO-263-3)
22
20
18
16
14
12
10
Infinite Heatsink
Infinite Heatsink
θJA=32℃/W
4
3
θJA=37℃/W
θJA=50℃/W
θJA=73℃/W
10℃/W Heatsink
2
1
0
8
6
4
NO Heatsink
NO Heatsink
2
0
0
30
40
50
60
70
80 90 100
10 20
0
30
50
70
80 90 100
10 20
40
60
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.
UTC UNISONIC TECHNOLOGIES CO., LTD.
10
QW-R102-016,A
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