LM2937-3.3V(T0-263) [UTC]
Regulator, 1 Output, BIPolar,;
| 型号： | LM2937-3.3V(T0-263) |
| 厂家： | 
Unisonic Technologies |
| 描述： | Regulator, 1 Output, BIPolar, |
| 文件： | 总7页 (文件大小：193K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UTC LM2937-XX LINEAR INTEGRATED CIRCUIT
500mA LOW DROPOUT VOLTAGE
REGULATOR
DESCRIPTION
The UTC LM2937-XX is a positive voltage regulator
1
capable of supplying up to 500mA of load current. The use of
a PNP power transistor provides a low dropout voltage
characteristic. With a load current of 500mA the minimum
input to output voltage differential required for the output to
remain in regulation is typically 0.5V(1V guaranteed maximum
over the full operating temperature range). Special circuitry
has been incorporated to minimize the quiescent current to
typically only 10mA with a full 500mA load current when the
input to output voltage differential is greater than 3V.
T0-220
1
The UTC LM2937-XX requires an output bypass
capacitor for stability. As with most low dropout regulators, the
ESR of this capacitor remains a critical design parameter, but
the LM2937 includes special compensation circuitry that
relaxes ESR requirements. The UTC LM2937-XX is stable for
all ESR below 3Ω.This allows the use of low ESR chip
T0-263
1:Input 2:GND 3:Output
capacitors.
Ideally suited for automotive applications, the UTC
LM2937-XX will protect itself and any load circuitry from
reverse battery connections, two-battery jumps and up to
+60V/-50V load dump transients. Familiar regulator features
such as short circuit and thermal shutdown protection are also
built in.
FEATURES
*Fully specified for operation over -40°C to +125°C
*Output current in excess of 500mA
*Output trimmed for 5% tolerance under all operating
conditions
*Typical dropout voltage of 0.5V at full rated load current
*Wide output capacitor ESR range, up to 3Ω
*Reverse battery protection
*Internal short circuit and thermal overload protection
*60V input transient protection
*Mirror image insertion protection
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R102-012,A
UTC LM2937-XX LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION
V IN
V O U T
LM 2937-XX
IQ
U N R E G U LA T E D
IN P U T
R E G U LA T E D
O U T P U T
C in*
C O U T **
μ
0.1
F
μ
10
F
* Required if the regulator is located more than 3 inches from the power supply filter capacitors.
**Required for stability. COUT must be at least 10µF(over the full expected operating temperature range) and located
as close as possible to the regulator. The equivalent series resistance, ESR ,of this capacitor may be as high as
3ꢀ.
ABSOLUTE MAXIMUM RATINGS(Note 1)
PARAMETER
Internal Power Dissipation(Note 2)
Input Voltage
SYMBOL
RATING
Internally limited
26
-65 ~ +150
150
UNIT
VIN
Tstg
Tj
V
°C
°C
Storage temperature Range
Maximum Junction Temperature
LM2937-3.3V ELECTRICAL CHARACTERISTICS
( VIN=VNOM+5V,IO=500mA,Cout =10µF, Tj=TA=25°C ,unless otherwise specified )
PARAMETER
Output Voltage
Line Regulation
Load Regulation
SYMBOL
Vo
TEST CONDITIONS
5mA≤IO≤500mA
Vo+2V≤VIN≤26V, IO=5mA
5mA≤IO≤500mA
MIN.
3.21
TYP.
3.30
9
MAX.
3.39
30
UNIT.
V
△VO
mV
mV
mA
mA
µVrms
mV
V
mV
A
V
V
△VO
3
30
(Vo+2V)≤VIN ≤26V,IO=5mA
VIN= Vo+5V, IO=500mA
10Hz-100kHz, IO=5mA
1000Hrs
2
10
100
12
10
20
Quiescent Current
IQ
Output Noise Voltage
Long Term Stability
VNOISE
IO=500mA
0.5
110
1.0
75
1.0
250
Dropout Voltage
VD
IO=50mA
Short Circuit Current
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input
Voltage
IS
Tin
VRin
0.6
60
-15
tf≤100ms ,RL=100ꢀ
VO ≥-0.6V ,RL=100ꢀ
-30
VTRRI
tf<1ms ,RL=100ꢀ
-50
-75
V
UTC UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R102-012,A
UTC LM2937-XX LINEAR INTEGRATED CIRCUIT
LM2937-5.0V ELECTRICAL CHARACTERISTICS
(VIN=VNOM+5V,IO=500mA,Cout =10µF, Tj=TA=25°C,,unless otherwise specified )
PARAMETER
Output Voltage
Line Regulation
Load Regulation
SYMBOL
Vo
TEST CONDITIONS
5mA≤IO≤500mA
Vo+2V≤VIN≤26V, IO=5mA
5mA≤IO≤500mA
MIN.
4.85
TYP.
5.00
15
MAX.
5.15
50
UNIT.
V
△VO
mV
mV
mA
mA
µVrms
mV
V
mV
A
V
V
△VO
5
50
(Vo+2V)≤VIN ≤26V,IO=5mA
VIN= Vo+5V, IO=500mA
10Hz-100kHz, IO=5mA
1000Hrs
2
10
150
20
10
20
Quiescent Current
IQ
Output Noise Voltage
Long Term Stability
VNOISE
IO=500mA
0.5
110
1.0
75
1.0
250
Dropout Voltage
VD
IO=50mA
Short Circuit Current
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input
Voltage
IS
Tin
VRin
0.6
60
-15
tf≤100ms ,RL=100ꢀ
VO ≥-0.6V ,RL=100ꢀ
-30
VTRRI
tf<1ms ,RL=100ꢀ
-50
-75
V
LM2937-8.0V ELECTRICAL CHARACTERISTICS
(VIN=VNOM+5V,IO=500mA,Cout =10µF, Tj=TA=25°C,,unless otherwise specified )
PARAMETER
Output Voltage
Line Regulation
Load Regulation
SYMBOL
Vo
TEST CONDITIONS
5mA≤IO≤500mA
Vo+2V≤VIN≤26V, IO=5mA
5mA≤IO≤500mA
MIN.
7.76
TYP.
8.00
24
MAX.
8.24
80
UNIT.
V
△VO
mV
mV
mA
mA
µVrms
mV
V
mV
A
V
V
△VO
8
80
(Vo+2V)≤VIN ≤26V,IO=5mA
VIN= Vo+5V, IO=500mA
10Hz-100kHz, IO=5mA
1000Hrs
2
10
240
32
10
20
Quiescent Current
IQ
Output Noise Voltage
Long Term Stability
VNOISE
IO=500mA
0.5
110
1.0
75
1.0
250
Dropout Voltage
VD
IO=50mA
Short Circuit Current
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input
Voltage
IS
Tin
VRin
0.6
60
-15
tf≤100ms ,RL=100ꢀ
VO ≥-0.6V ,RL=100ꢀ
-30
VTRRI
tf<1ms ,RL=100ꢀ
-50
-75
V
LM2937-10.0V ELECTRICAL CHARACTERISTICS
(VIN=VNOM+5V,IO=500mA,Cout =10µF, Tj=TA=25°C,,unless otherwise specified )
PARAMETER
Output Voltage
Line Regulation
Load Regulation
SYMBOL
Vo
TEST CONDITIONS
5mA≤IO≤500mA
Vo+2V≤VIN≤26V, IO=5mA
5mA≤IO≤500mA
MIN.
9.70
TYP.
10.00
30
MAX.
10.30
100
100
10
UNIT.
V
△VO
mV
mV
mA
mA
µVrms
mV
V
mV
A
V
△VO
10
(Vo+2V)≤VIN ≤26V,IO=5mA
VIN= Vo+5V, IO=500mA
10Hz-100kHz, IO=5mA
1000Hrs
2
10
Quiescent Current
IQ
20
Output Noise Voltage
Long Term Stability
VNOISE
300
40
0.5
110
1.0
75
IO=500mA
1.0
250
Dropout Voltage
VD
IO=50mA
Short Circuit Current
Peak Line Transient Voltage
IS
Tin
0.6
60
tf≤100ms ,RL=100ꢀ
UTC UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R102-012,A
UTC LM2937-XX LINEAR INTEGRATED CIRCUIT
PARAMETER
Reverse DC Input Voltage
Reverse Transient Input
Voltage
SYMBOL
VRin
TEST CONDITIONS
MIN.
-15
TYP.
-30
MAX.
UNIT.
V
VO ≥-0.6V ,RL=100ꢀ
VTRRI
tf<1ms ,RL=100ꢀ
-50
-75
V
LM2937-12.0V ELECTRICAL CHARACTERISTICS
(VIN=VNOM+5V,IO=500mA,Cout =10µF, Tj=TA=25°C,,unless otherwise specified )
PARAMETER
Output Voltage
Line Regulation
Load Regulation
SYMBOL
Vo
TEST CONDITIONS
5mA≤IO≤500mA
Vo+2V≤VIN≤26V, IO=5mA
5mA≤IO≤500mA
MIN.
TYP.
12.00
36
MAX.
12.36
120
120
10
UNIT.
V
11.64
△VO
mV
mV
mA
mA
µVrms
mV
V
mV
A
V
V
△VO
12
(Vo+2V)≤VIN ≤26V,IO=5mA
VIN= Vo+5V, IO=500mA
10Hz-100kHz, IO=5mA
1000Hrs
2
10
360
44
Quiescent Current
IQ
20
Output Noise Voltage
Long Term Stability
VNOISE
IO=500mA
0.5
110
1.0
75
1.0
250
Dropout Voltage
VD
IO=50mA
Short Circuit Current
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input
Voltage
IS
Tin
VRin
0.6
60
-15
tf≤100ms ,RL=100ꢀ
VO ≥-0.6V ,RL=100ꢀ
-30
VTRRI
tf<1ms ,RL=100ꢀ
-50
-75
V
LM2937-15.0V ELECTRICAL CHARACTERISTICS
(VIN=VNOM+5V,IO=500mA,Cout =10µF, Tj=TA=25°C,,unless otherwise specified )
PARAMETER
Output Voltage
Line Regulation
Load Regulation
SYMBOL
Vo
TEST CONDITIONS
5mA≤IO≤500mA
Vo+2V≤VIN≤26V, IO=5mA
5mA≤IO≤500mA
MIN.
TYP.
15.00
45
MAX.
15.45
150
150
10
UNIT.
V
14.55
△VO
mV
mV
mA
mA
µVrms
mV
V
mV
A
V
V
△VO
15
(Vo+2V)≤VIN ≤26V,IO=5mA
VIN= Vo+5V, IO=500mA
10Hz-100kHz, IO=5mA
1000Hrs
2
10
450
56
Quiescent Current
IQ
20
Output Noise Voltage
Long Term Stability
VNOISE
IO=500mA
0.5
110
1.0
75
1.0
250
Dropout Voltage
VD
IO=50mA
Short Circuit Current
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input
Voltage
IS
Tin
VRin
0.6
60
-15
tf≤100ms ,RL=100ꢀ
VO ≥-0.6V ,RL=100ꢀ
-30
VTRRI
tf<1ms ,RL=100ꢀ
-50
-75
V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical
Specifications do not apply when operating the device outside of its rated Operating Conditions.
Note 2: The maximum allowable power dissipation at any ambient temperature is PMAX=(125-TA)/ ΘJA, where 125 is
the maximum junction temperature for operation, TA is the ambient temperature, and ΘJA is the junction to
ambient thermal resistance. If this dissipation is exceeded, the die temperature will rise above 125°C and
the electrical specifications do not apply. If the die temperature rises above 150°C, the LM2937 will go into
thermal shutdown. For the LM2937, the junction to ambient thermal resistance ΘJA is 65°C/W, for the
TO-220 package and 73°C/W for the TO-263 package. When used with a heat sink, ΘJA is the sum of the
LM2937 junction to case thermal resistance ΘJC of 3°C/W and the heat sink case to ambient thermal
UTC UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R102-012,A
UTC LM2937-XX LINEAR INTEGRATED CIRCUIT
resistance. If the TO-263packag is used, the thermal resistance can be reduced by increasing P.C. board
copper area thermally connected to the package.
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage vsTemperature
Dropout Voltage vs Output Current
1.0
0.9
0.8
Tj=25℃
0.9
0.8
0.7
0.6
0.7
0.6
0.5
0.5A
0.5
0.4
0.25A
0.4
0.3
0.3
0.2
0.2
0.05A
0.1
0
0.1
0
0
80
Temperature (℃)
120
-40
40
100
300
Output Current (mA)
400
500
0
200
Output Voltage vs Temperature
Quiescent Current vs Temperature
20
5.10
5.08
5.06
5.04
5.02
5.00
RL=100Ω
15
10
500mA
250mA
5mA
4.98
4.96
5
0
4.94
4.92
4.90
0
80
Temperature (℃)
120
-40
40
0
80
Temperature (℃)
120
-40
40
Quiescent Current vs Input Voltage
Quiescent Current vs Input Voltage
100
90
10
9
VIN=14V
VO=5V
Tj=25℃
VO=5V
TA=25℃
80
8
7
70
60
6
0.5A
50
40
30
5
4
3
0.25A
0.05A
20
2
10
0
1
0
5
10
15
25
30
35
20
0
100
300
Output Current (mA)
400
500
0
200
Input Voltage (V)
UTC UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R102-012,A
UTC LM2937-XX LINEAR INTEGRATED CIRCUIT
Load Transient Response
Line Transient Response
40
IOUT=50mA
Vo=5 V
20
TA=25℃
50
0
0
-50
-20
400
0
3V
0V
5
6
0
2
3
4
50
60
-1
1
0
20
30
40
-10
10
Time (μs)
Time (μs)
Low Voltage Behavior
Ripple Rejection
5.0
VIN=10V
Vo=5 V
Io=500mA
Vo=5 V
Tj=25℃
70
4.0
3.0
μ
COUT=10
Io=50mA
F
60
50
2.0
40
1.0
0
0
2.0
4.0
5.0 6.0
1.0
3.0
10
1K
10K
100K
1M
100
Input Voltage (V)
Frequency (Hz)
Low Voltage Behavior
Io=500mA
Low Voltage Behavior
18
15
14
12
10
Vo=15 V
Io=500mA
Tj=25℃
Tj=25℃
Vo=10V
12
8
6
4
Vo=12 V
9
6
Vo=8 V
3
0
2
0
3
6
12
15
18
9
0
2
4
6
10
12
14
8
0
Input Voltage (V)
Input Voltage (V)
UTC UNISONIC TECHNOLOGIES CO., LTD.
6
QW-R102-012,A
UTC LM2937-XX LINEAR INTEGRATED CIRCUIT
Output at Voltage Extremes
Output at Voltage Extremes
12
20
RL=100Ω
RL=100Ω
Vo=10V
10
16
Vo=15V
8
6
12
8
Vo=8V
Vo=12V
4
2
Vo=5V
4
0
0
-2
-4
-20 -10
0
20 30 40
-20 -10
0
20 30 40
10
10
-30
-30
Input Voltage (V)
Input Voltage (V)
Output Impedance
Output Capacitor ESR
Vo=5V
COUT=10μ F
100
10
1
VIN=14V
Vo=5 V
COUT=10μ F
Io=25mA
10
1.0
0.1
STABLE REGION
0.1
0.01
0.01
10
1K
10K
100K
1M
100
400
Output Current (mA)
100
200
500
300
0
Frequency (Hz)
Peak Output Current
VIN=14V
1.5
1.0
0.5
0
0
40
80
120
-40
Temperature (℃)
UTC UNISONIC TECHNOLOGIES CO., LTD.
7
QW-R102-012,A
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