Output Current 500mA at 15V, 12V, 10V, 8V, 5V, 3.3V and 2.5V
•
Internal Short Circuit Current Limit
•
Dropout Voltage 0.5V at 500mA Output
•
Extremely Tight Load and Line Regulation
•
Very Low Temperature Coefficient
•
Mirror Image Insertion Protection
•
Direct Replacement For LM2937 Socket
APPLICATIONS
•
Battery Powered Systems
•
Cordless Telephones
•
Automotive Electronics
•
Portable/ Palm Top / Notebook Computers
•
Portable Consumer Equipment
•
Portable Instrumentation
•
SMPS Post-Regulator
•
Voltage Reference
PRODUCT DESCRIPTION
The SPX2937 is a low power positive voltage regulator. The SPX2937 offers 500mA output current with a dropout voltage of only
0.5V and over temperature dropout is up to 1V. The quiescent current is 10mA at differential output of 5V and output current of
500mA. A higher quiescent current can exist when the device is in dropout mode (V
IN
- V
OUT
≤
3V )
The regulator will automatically shut down to protect both the internal circuits and the load. This device also features short circuit and
thermal overload protection.
The SPX2937 is offered in a 3-pin TO-220 package compatible with other 5 volt and 3.3 volt regulators, TO-263 and SOT-223. This
device offers a variety of output voltages 15V, 12V, 10V, 8V, 5V, 3.3V and 2.5V. SPX2937 is a direct replacement to LM2937.
PIN CONNECTIONS
SOT-223 (M3)
TO-263-3 (T)
TO-220-3 (U)
SPX2937
1
2
3
1
SPX2937
2
3
SPX2937
1
2
3
V
IN
GND V
OUT
Top View
V
OUT
GND V
IN
Top View
V
OUT
GND V
IN
Front View
Rev. 10/30/00
SPX2937
ABSOLUTE MAXIMUM RATINGS
Power Dissipation..........................................Internally Limited
Lead Temp. (Soldering, 10 Seconds) .............................. 260°C
Storage Temperature Range ......................... -65°C to +150°C
Operating Junction Temperature Range ........ -40°C to +125°C
Input Supply Voltage ................................................... +20V
Feedback Input Voltage ..................................-1.5V to +20V
Shutdown Input Voltage..................................-0.3V to +20V
Error Comparator Output ................................-0.3V to +20V
ESD Rating ............................................................2KV Min
ELECTRICAL CHARACTERISTICS
at V
IN
= V
O
+ 5V, I
O
= 500mA, C
O
= 10
µF,
unless otherwise specified. Limits in
Boldface
type apply over the entire operating temperature range. All other specifications are T
A
= 25°C.
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Dropout Voltage
Quiescent
Current
CONDITIONS
5mA
≤I
O
≤0.75A
V
O
+2V≤V
IN
≤
20V
I
O
=5mA
50mA≤I
O
≤
500mA
I
L
= 50 mA
I
L
= 500mA
V
O
+ 2V
≤V
IN
≤20V
I
O
= 5mA
V
IN
=V
O
+5V
I
O
=500mA
10Hz - 100kHz
I
O
= 5mA
F
O
= 120Hz, 1V
RMS
I
O
= 500mA
SPX2937-2.5
Min
Typ
Max
2.42
2.5
2.56
2.38
2.62
7.5
25
2.5
110
0.5
2
10
75
25
250
1.0
10
20
SPX2937-3.3
Min
Typ
Max
3.20
3.3
3.40
3.14
3.46
9.9
33
3.3
110
0.5
2
10
99
33
250
1.0
10
20
SPX2937-5.0
Min
Typ
Max
4.85
5.0
5.15
4.75
5.25
15
50
5
110
0.5
2
10
150
50
250
1.0
10
20
SPX2937-8.0
Min
Typ
Max
7.76
8.0
8.24
7.60
8.40
24
80
8
110
0.5
2
10
240
80
250
1.0
10
20
UNITS
V
mV
mV
mV
V
mA
mA
µV
RMS
dB
mV/ 1000Hr
A
V
V
Output Noise
Voltage
Ripple Rejection
Long Term
Stability
Short Circuit
Current
Maximum Line
Transient
Reverse Polarity
DC Input
Voltage
Reverse Polarity
Transient Input
Voltage
60
54
10
0.6
1.0
75
-30
72
60
54
13.2
0.6
60
-15
1.0
75
-30
72
60
54
72
20
60
54
72
32
1.0
60
-15
0.60
75
-30
1.0
60
-15
0.60
75
-30
R
O
= 100Ω
T
≤
100ms
R
O
= 100Ω
R
O
= 100Ω
T
≤
100ms
60
-15
-50
-75
-50
-75
-50
-75
-50
-75
V
Rev. 10/30/00
SPX2937
ELECTRICAL CHARACTERISTICS
at V
IN
= V
O
+ 5V, I
O
= 500mA, C
O
= 10
µF,
unless otherwise specified. Limits in
Boldface
type apply over the entire operating temperature range. All other specifications are T
A
= 25°C.
PARAMETER
CONDITIONS
SPX2937-10
Min
Typ
Max
SPX2937-12
Min
Typ
Max
SPX2937-15
Min
Typ
Max
UNITS
Output Voltage
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
5mA
≤I
O
≤500mA
V
O
+2V≤V
IN
≤
20V
I
O
=5mA
5mA≤I
O
≤
500mA
I
L
= 50 mA
I
L
= 500mA
V
O
+ 2V
≤V
IN
≤20V
I
O
= 5mA
V
IN
=V
O
+5V
I
O
=500mA
10Hz- 100kHz
I
O
= 5mA
9.70
9.50
10.0
30
10
0.5
2
10
300
10.3
10.5
100
100
250
1.0
10
20
11.64
11.40
12.0
36
12
110
0.5
2
10
360
44
12.36
12.60
120
120
250
1.0
10
20
14.55
14.25
15.0
45
15
110
0.5
2
10
450
56
15.45
15.75
150
150
250
1.0
10
20
V
mV
mV
mV
V
mA
mA
µV
RMS
mV/ 1000Hr
Output Noise
Voltage
Long Term
Stability
Short Circuit
Current
Maximum Line
Transient
Reverse Polarity
DC Input Voltage
Reverse Polarity
Transient Input
Voltage
51
45
63
1.0
0.6
60
-15
-15
-50
1.0
75
-30
-30
-75
0.6
60
-15
-15
-50
1.0
75
-30
-30
-75
0.6
A
V
V
V
R
O
= 100Ω
T
≤
100ms
R
O
= 100Ω
R
O
= 100Ω
T
≤
100ms
60
-15
-15
-50
75
-30
-30
-75
APPLICATION HINTS
EXTERNAL CAPACITORS
The stability of the SPX2937 requires a 10µF or greater capacitor between output and ground. Oscillation could occur without this capacitor. Most
types of tantalum or aluminum electrolytic works fine here. For operations below -25°C solid tantalum is recommended since the many aluminum
types have electrolytes that freeze at about -30°C. The ESR of about 5Ω or less and resonant frequency above 500 kHz are the most important
parameters in the value of the capacitor. The capacitor value may be increased without limit.
At lower values of output current, less output capacitance is required for stability. For the currents below 10mA the value of the capacitor can be
reduced to 22µF and 0.15µF for 1mA.
Rev. 10/30/00
SPX2937
ORDERING INFORMATION
Ordering No.
SPX2937U3-2.5
SPX2937U3-3.3
SPX2937U3-5.0
SPX2937U3-8.0
SPX2937U3-10
SPX2937U3-12
SPX2937U3-15
SPX2937T3-2.5
SPX2937T3-3.3
SPX2937T3-5.0
SPX2937T3-8.0
SPX2937T3-10
SPX2937T3-12
SPX2937T3-15
SPX2937M3-2.5
SPX2937M3-3.3
SPX2937M3-5.0
SPX2937M3-8.0
SPX2937M3-10
SPX2937M3-12
SPX2937M3-15
Output Voltages
2.5V
3.3V
5.0V
8.0V
10.0V
12.0V
15.0V
2.5V
3.3V
5.0V
8.0V
10.0V
12.0V
15.0V
2.5V
3.3V
5.0V
8.0V
10.0V
12.0V
15.0V
Packages
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and Main Offices:
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 935-7600
FAX: (408) 934-7500
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described
hereing; neither does it convey any license under its patent rights nor the rights of others.
京公网安备 11010802033920号
EEWORLD
