LM2937L-15-TQ5-T [UTC]
500mA LOW DROPOUT VOLTAGE REGULATOR;
| 型号： | LM2937L-15-TQ5-T |
| 厂家： | 
Unisonic Technologies |
| 描述： | 500mA LOW DROPOUT VOLTAGE REGULATOR |
| 文件： | 总10页 (文件大小：249K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LM2937
LINEAR INTEGRATED CIRCUIT
500mA LOW DROPOUT
VOLTAGE REGULATOR
DESCRIPTION
The UTC LM2937 is a positive voltage regulator 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.
The UTC LM2937 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 is stable for all ESR below 3Ω.This allows the use of low ESR
chip capacitors.
Ideally suited for automotive applications, the UTC LM2937 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 -40C~ +125C
* 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 3ꢀ
* Reverse battery protection
* Internal short circuit and thermal overload protection
* 60V input transient protection
* Mirror image insertion protection
* Built-in ON/OFF control function
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LM2937
LINEAR INTEGRATED CIRCUIT
ORDERING INFORMATION
Order Number
Package
Packing
Lead Free
Halogen Free
LM2937L-xx-AA3-R
LM2937L-xx-TA3-T
LM2937L-xx-TQ2-R
LM2937L-xx-TQ2-T
LM2937L-xx-TQ3-R
LM2937L-xx-TQ3-T
LM2937L-xx-TQ5-R
LM2937L-xx-TQ5-T
LM2937G-xx-AA3-R
LM2937G-xx-TA3-T
LM2937G-xx-TQ2-R
LM2937G-xx-TQ2-T
LM2937G-xx-TQ3-R
LM2937G-xx-TQ3-T
LM2937G-xx-TQ5-R
LM2937G-xx-TQ5-T
SOT-223
TO-220
Tape Reel
Tube
TO-263
Tape Reel
Tube
TO-263
TO-263-3
TO-263-3
TO-263-5
TO-263-5
Tape Reel
Tube
Tape Reel
Tube
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
SOT-223
33 :3.3V
50 :5.0V
80 :8.0V
10 :10V
12 :12V
15 :15V
L: Lead Free
G: Halogen Free
UTC
LM2937
TO-220
TO-263
TO-263-3
Lot Code
Voltage Code
Date Code
1
2
3
TO-263-5
PIN CONFIGURATION
PIN NO.
PIN NAME
SOT-223/TO-220
TO-263-5
TO-263/TO-263-3
1
2
3
-
4
3
5
1
2
Input
GND
Output
N/C
-
ON/OFF
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LM2937
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Note 1)
PARAMETER
SYMBOL
VIN
RATINGS
26
UNIT
V
Input Voltage
Power Dissipation(Note 2)
Maximum Junction Temperature
Storage Temperature
PD
Internally limited
+150
TJ
C
C
TSTG
-40 ~ +150
Notes: 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.
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
125C and the electrical specifications do not apply. If the die temperature rises above 150C, the
LM2937 will go into thermal shutdown.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
SOT-223
174
65
73
15
3
Junction to Ambient
Junction to Case
θJA
TO-220
TO-263/ TO-263-5
SOT-223
C/W
θJC
TO-220
TO-263/ TO-263-5
4
ELECTRICAL CHARACTERISTICS
(VIN=VNOM+5V, IOUT=500mA, COUT=10μF, TJ=Ta=25C, unless otherwise specified.)
For LM2937-3.3V
PARAMETER
Output Voltage
SYMBOL
VOUT
TEST CONDITIONS
5mA≤IOUT≤500mA
MIN
3.21
TYP
MAX
3.39
30
UNIT
3.30
9
V
mV
mV
mA
mA
μVrms
mV
V
Line Regulation
Load Regulation
△VOUT
△VOUT
VOUT+2V≤VIN≤26V, IOUT=5mA
5mA≤IOUT≤500mA
3
30
(VO+2V)≤VIN ≤26V, IOUT=5mA
VIN= VOUT+5V, IOUT=500mA
10Hz-100kHz, IOUT=5mA
1000Hrs
2
10
Quiescent Current
IQ
10
20
Output Noise Voltage
Long Term Stability
eN
100
12
IOUT=500mA
0.5
110
1.0
75
1.0
Dropout Voltage
VD
I
OUT=50mA
250
mV
A
Short Circuit Current
ISC
TIN
0.6
60
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input Voltage
tF≤100ms, RL=100ꢀ
VOUT ≥-0.6V, RL=100ꢀ
tF<1ms, RL=100ꢀ
V
VRIN
VTRRI
-15
-50
-30
-75
V
V
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LM2937
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (Cont.)
For LM2937-5.0V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
5mA≤IOUT≤500mA
MIN
4.85
TYP
5.00
15
MAX
5.15
50
UNIT
V
Output Voltage
Line Regulation
Load Regulation
△VOUT
△VOUT
VOUT+2V≤VIN≤26V, IOUT=5mA
5mA≤IOUT≤500mA
mV
mV
mA
mA
μVrms
mV
V
5
50
(VOUT+2V)≤VIN ≤26V, IOUT=5mA
VIN= VOUT+5V, IOUT=500mA
10Hz-100kHz, IOUT=5mA
1000Hrs
2
10
Quiescent Current
IQ
10
20
Output Noise Voltage
Long Term Stability
eN
150
20
IOUT=500mA
0.5
110
1.0
75
1.0
Dropout Voltage
VD
IOUT=50mA
250
mV
A
Short Circuit Current
ISC
TIN
0.6
60
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input Voltage
tF≤100ms, RL=100ꢀ
VOUT ≥-0.6V, RL=100ꢀ
tF<1ms, RL=100ꢀ
V
VRIN
VTRRI
-15
-50
-30
-75
V
V
For LM2937-8.0V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
5mA≤IOUT≤500mA
MIN
7.76
TYP
8.00
24
MAX
8.24
80
UNIT
V
Output Voltage
Line Regulation
Load Regulation
△VOUT
△VOUT
VOUT+2V≤VIN≤26V, IOUT=5mA
5mA≤IOUT≤500mA
mV
mV
mA
mA
μVrms
mV
V
8
80
(VOUT+2V)≤VIN ≤26V,IOUT=5mA
VIN= Vo+5V, IOUT=500mA
10Hz-100kHz, IOUT=5mA
1000Hrs
2
10
Quiescent Current
IQ
10
20
Output Noise Voltage
Long Term Stability
eN
240
32
IOUT=500mA
0.5
110
1.0
75
1.0
Dropout Voltage
VD
IOUT=50mA
250
mV
A
Short Circuit Current
ISC
TIN
0.6
60
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input Voltage
tF≤100ms, RL=100ꢀ
VOUT ≥-0.6V, RL=100ꢀ
tF<1ms, RL=100ꢀ
V
VRIN
VTRRI
-15
-50
-30
-75
V
V
For LM2937-10.0V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
5mA≤IOUT≤500mA
MIN
9.70
TYP
MAX
UNIT
V
Output Voltage
Line Regulation
Load Regulation
10.00 10.30
△VOUT
△VOUT
VOUT+2V≤VIN≤26V, IOUT=5mA
5mA≤IOUT≤500mA
30
10
100
100
10
mV
mV
mA
mA
μVrms
mV
V
(VOUT+2V)≤VIN ≤26V,IOUT=5mA
VIN= VOUT+5V, IOUT=500mA
10Hz-100kHz, IOUT=5mA
1000Hrs
2
Quiescent Current
IQ
10
20
Output Noise Voltage
Long Term Stability
eN
300
40
IOUT=500mA
0.5
110
1.0
75
1.0
Dropout Voltage
VD
IOUT=50mA
250
mV
A
Short Circuit Current
ISC
TIN
0.6
60
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input Voltage
tF≤100ms ,RL=100ꢀ
VOUT≥-0.6V ,RL=100ꢀ
tF<1ms ,RL=100ꢀ
V
VRIN
VTRRI
-15
-50
-30
-75
V
V
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LM2937
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (Cont.)
For LM2937-12.0V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
5mA≤IOUT≤500mA
MIN
TYP
MAX
UNIT
V
Output Voltage
Line Regulation
Load Regulation
11.64 12.00 12.36
△VOUT
△VOUT
VOUT+2V≤VIN≤26V, IOUT=5mA
5mA≤IOUT≤500mA
36
12
120
120
10
mV
mV
mA
mA
μVrms
mV
V
(VOUT+2V)≤VIN ≤26V,IOUT=5mA
VIN= VOUT+5V, IOUT=500mA
10Hz-100kHz, IOUT=5mA
1000Hrs
2
Quiescent Current
IQ
10
20
Output Noise Voltage
Long Term Stability
eN
360
44
IOUT=500mA
0.5
110
1.0
75
1.0
Dropout Voltage
VD
IOUT=50mA
250
mV
A
Short Circuit Current
ISC
TIN
0.6
60
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input Voltage
tF≤100ms, RL=100ꢀ
VOUT≥-0.6V, RL=100ꢀ
tF<1ms, RL=100ꢀ
V
VRIN
VTRRI
-15
-50
-30
-75
V
V
For LM2937-15.0V
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
5mA≤IOUT≤500mA
MIN
TYP
MAX
UNIT
V
Output Voltage
Line Regulation
Load Regulation
14.55 15.00 15.45
△VOUT
△VOUT
VOUT+2V≤VIN≤26V, IOUT=5mA
5mA≤IOUT≤500mA
45
15
150
150
10
mV
mV
mA
mA
μVrms
mV
V
(VOUT+2V)≤VIN ≤26V,IOUT=5mA
VIN= VOUT+5V, IOUT=500mA
10Hz-100kHz, IOUT=5mA
1000Hrs
2
Quiescent Current
IQ
10
20
Output Noise Voltage
Long Term Stability
eN
450
56
IOUT=500mA
0.5
110
1.0
75
1.0
Dropout Voltage
VD
IOUT=50mA
250
mV
A
Short Circuit Current
ISC
TIN
0.6
60
Peak Line Transient Voltage
Reverse DC Input Voltage
Reverse Transient Input Voltage
tF≤100ms, RL=100ꢀ
VOUT≥-0.6V, RL=100ꢀ
tF<1ms, RL=100ꢀ
V
VRIN
VTRRI
-15
-50
-30
-75
V
V
ON/OFF CONTROL (For 5 pins only)
PARAMETER
SYMBOL
VON
TEST CONDITIONS
IOUT≦0.5A
MIN
2.0
TYP
50
MAX
0.8
UNIT
V
ON/OFF Threshold Voltage ON
ON/OFF Threshold Voltage OFF
ON/OFF Threshold Current
IOUT≦0.5A
VOFF
V
μA
ION/OFF
VON/OFF=2.0V, IOUT=0.5A
100
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LM2937
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION
ON/OFF CONTROL APPLICATION
* 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.
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LM2937
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Dropout Voltage vs Temperature
Dropout Voltage vs Output Current
TJ=25℃
1.0
0.9
0.8
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
-40
0.1
0
0
80
Temperature (℃)
120
40
100
300
400
500
0
200
Output Current (mA)
Output Voltage vs Temperature
Quiescent Current vs Temperature
20
5.10
RL=100Ω
5.08
5.06
5.04
5.02
5.00
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
VOUT=5V
Ta=25℃
100
90
10
9
VIN=14V
VOUT=5V
TJ=25℃
80
8
7
70
60
6
0.5A
5
4
3
50
40
30
0.25A
0.05A
20
2
10
0
0
1
0
0
5
10 15
25 30 35
20
100
300
Output Current (mA)
400
500
200
Input Voltage (V)
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LM2937
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Load Transient Response
Line Transient Response
40
20
0
IOUT=50mA
VOUT=5 V
Ta=25℃
50
0
-50
-20
400
0
3V
0V
5
6
0
2
3
4
50 60
-1
1
0
20 30
Time (μs)
40
-10
10
Time (μs)
Ripple Rejection
Low Voltage Behavior
5.0
IOUT=500mA
VOUT=5 V
TJ=25℃
VIN=10V
VOUT=5 V
μ
COUT=10
F
70
4.0
3.0
IOUT=50mA
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
Low Voltage Behavior
18
15
14
12
10
8
IOUT=500mA
IOUT=500mA
VOUT=15 V
TJ=25℃
TJ=25℃
VOUT=10V
12
VOUT=12 V
9
6
VOUT=8 V
6
4
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)
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LM2937
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Output at Voltage Extremes
Output at Voltage Extremes
12
10
20
16
RL=100Ω
RL=100Ω
VOUT=10V
VOUT=15V
8
6
12
8
VOUT=8V
VOUT=5V
VOUT=12V
4
2
4
0
0
-2
-30
-4
-30
-20 -10
0
20 30 40
-20 -10
0
20 30 40
10
10
Input Voltage (V)
Input Voltage (V)
Output Impedance
VIN=14V
Output Capacitor ESR
VOUT=5V
100
10
1
VOUT=5 V
COUT=10μF
IOUT=25mA
COUT=10μF
10
1.0
0.1
STABLE
REGION
0.1
0.01
0.01
10
1K
10K
100K
1M
100
100
200
400
500
300
0
Frequency (Hz)
Output Current (mA)
Peak Output Current
1.5
1.0
VIN=14V
0.5
0
0
40
80
120
-40
Temperature (℃)
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LM2937
LINEAR INTEGRATED CIRCUIT
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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