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SPX3940U-1-8 [SIPEX]

Fixed Positive LDO Regulator, 1.8V, PSFM3, TO-220AB, TO-220, 3 PIN;
SPX3940U-1-8
型号： SPX3940U-1-8
厂家： SIPEX CORPORATION    SIPEX CORPORATION
描述：

Fixed Positive LDO Regulator, 1.8V, PSFM3, TO-220AB, TO-220, 3 PIN

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SPX3940  
1A Low Dropout Voltage Regulator  
Fixed Output, Fast Response  
FEATURES  
■ 1% Output Accuracy SPX3940A  
■ Guaranteed 1.5A Peak Current  
■ Low Quiescent Current  
SPX3940  
3 Pin TO-263  
1
2
3
■ Low Dropout Voltage of 280mV at 1A  
■ Extremely Tight Load and Line Regulation  
■ Extremely Fast Transient Response  
■ Reverse-battery Protection  
VOUT  
VIN  
GND  
APPLICATIONS  
■ VGA & Sound Card  
■ Automotive Electronics  
■ LCD Monitors  
■ Cordless Telephones  
■ Power PCTM Supplies  
■ SMPS Post-Regulator  
■ Internal Thermal Protection  
■ Internal Short Circuit Current Limit  
■ Replacement for LM3940  
■ Standard SOT-223, TO-220  
and TO-263 packages  
■ Laptop, Palmtop, and Notebook Computer  
■ High Efficiency Linear Power Supplies  
■ Constant Current Regulators  
Now Available in Lead Free Packaging  
■ Portable Instrumentation  
DESCRIPTION  
The SPX3940 is a 1A, accurate voltage regulators with a low drop out voltage of 280mV(typical)  
at 1A. These regulators are specifically designed for low voltage applications that require a low  
dropoutvoltageandafasttransientresponse. Theyarefullyfaultprotectedagainstover-current,  
reverse battery, and positive and negative voltage transients.  
The SPX3940 is offered in 3-pin SOT-223, TO-220 & TO-263 packages. For a 3A version, refer  
to the SPX29300 data sheet.  
TYPICAL APPLICATIONS CIRCUIT  
SPX3940  
1
3
VOUT  
V
IN  
+
+
2
10µF  
6.8µF  
Figure 1. Fixed Output Linear Regulator.  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
1
ABSOLUTE MAXIMUM RATINGS  
Lead Temperature (soldering, 5 seconds) ................................. 260°C  
Storage Temperature Range ..................................... -65°C to +150°C  
Operating Junction Temperature Range ................... -40°C to +125°C  
Input Voltage (Note 5) ................................................................... 16V  
ELECTRICAL CHARACTERISTICS  
At V =VOUT + 1V and IOUT = 10 mA, CIN = 6.8 µF, COUT = 10µF; TA= 25°C, unless otherwise specified.  
The IBN oldface applies over the junction temperature range. Adjustable versions are set at 5.0V.  
PARAMETER  
CONDITIONS  
TYP  
MIN  
MAX  
MIN  
MAX  
UNITS  
SPX3940A (1%)  
SP3940 (2%)  
1.8V Version  
Output Voltage  
IOUT = 10mA  
10mA≤IOUT≤1A, 6V≤VIN≤16V  
1.8  
1.8  
1.782  
1.755  
1.818  
1.845  
1.764  
1.737  
1.836  
1.863  
V
V
V
V
2.5V Version  
Output Voltage  
IOUT = 10mA  
10mA≤IOUT ≤1A, 6V≤VIN≤16V  
2.5  
2.5  
2.475  
2.437  
2.525  
2.563  
2.450  
2.412  
2.550  
2.588  
3.3V Version  
Output Voltage  
IOUT = 10mA  
10mA≤IOUT ≤1A, 6V≤VIN≤16V  
3.3  
3.3  
3.267  
3.217  
3.333  
3.383  
3.234  
3.184  
3.366  
3.416  
5.0V Version  
Output Voltage  
IOUT = 10mA  
10mA≤IOUT ≤1A, 6V≤VIN≤16V  
5.0  
5.0  
4.950  
4.875  
5.050  
5.125  
4.900  
4.825  
5.100  
5.175  
All Voltage Options  
Line Regulation  
Load Regulation  
∆V  
IO=10mA, (VOUT+1V)≤VIN≤16V  
VIN=VOUT+1V, 10mA≤IOUT≤1A  
Output Voltage  
0.2  
0.3  
20  
1.0  
1.5  
100  
1.0  
1.5  
100  
%
%
ppm/°C  
∆T  
Temperature Coef.  
Dropout Voltage (Note 1)  
(except 1.8V version)  
Ground Current (Note 3)  
IO =100mA  
IO =1A  
IO =750mA, VIN=VOUT, + 1V  
IO =1A  
VIN=0.1V less than specified VOUT  
IOUT= 10mA  
70  
280  
12  
18  
1.2  
200  
550  
25  
200  
550  
25  
mV  
mA  
mA  
IGNDDO Ground Pin  
Current at Dropout  
Current Limit  
Output Noise Voltage  
(10Hz to 100kHz)  
IL=100mA  
VOUT=0V (Note 2)  
CL= 10µF  
2.2  
400  
1.5  
1.5  
A
µVRMS  
CL=33µF  
260  
3
29.4  
3
31.4  
15  
Thermal Resistance  
TO-220 Junction to Case, at Tab  
TO-220 Junction to Ambient  
TO-263 Junction to Case, at Tab  
TO-263 Junction to Ambient  
SOT-223 Junction to Case, at Tab  
SOT-223 Junction to Ambient  
°C/W  
°C/W  
°C/W  
62.3  
NOTES:  
Note 1: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its normal value.  
Note 2: V =V + 1V. For example, use V =4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise.  
IN  
OUT (NOMINAL)  
IN  
Note 3: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current.  
Note 4: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects.  
Note 5: Maximum positive supply voltage of 20V must be of limited duration (<100ms) and duty cycle (<1%). The maximum continuous supply voltage is 16V.  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
2
BLOCK DIAGRAM  
IN  
OUT  
O.V  
ILIMIT  
1.240V  
28V  
R1  
Reference  
+
-
Ibias  
Thermal  
Shutdown  
R2  
GND  
TYPICAL PERFORMANCE CHARACTERISTICS  
3.310  
3.305  
3.300  
3.295  
3.290  
3.320  
3.315  
3.310  
3.305  
3.300  
3.295  
3.290  
3.285  
3.280  
3.3V Device  
IL = 10mA  
CL = 10µF  
3.3V Device  
IL=4.3mA  
3.285  
3.280  
CL=10µF  
4
6
8
10  
12  
14  
16  
0
0.25  
0.5  
0.75  
1
1.25  
1.5  
VIN (V)  
IL (A)  
Figure 2. Line Regulation  
Figure 3. Load Regulation  
100  
95  
90  
85  
80  
75  
70  
80.0  
70.0  
60.0  
50.0  
40.0  
30.0  
20.0  
10.0  
0.0  
3.3V Device  
IL = 10 mA  
CL = 10µF  
3.3V Device  
V
= 4.3V  
CILN = 10µF  
0
0.25  
0.5  
0.75  
IL (A)  
1
1.25  
1.5  
-40  
-20  
0
20  
40  
VIN (V)  
60  
80  
100  
120  
Figure 4. Ground Current vs Load Current  
Figure 5. Ground Current vs Input Voltage  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
3
TYPICAL PERFORMANCE CHARACTERISTICS  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
600  
500  
400  
300  
200  
3.3 Device  
VIN = 3.2V  
CL = 10µF  
3.3V Device  
100  
CL = 10µF  
0
0
0.25  
0.5  
0.75  
1
1.25  
1.5  
0
0.25  
0.5  
0.75  
1
1.25  
1.5  
IL (A)  
IL(A)  
Figure 6. Ground Current vs Load Current in Dropout  
Figure 7. Dropout Voltage vs Load Current  
280  
270  
260  
250  
240  
230  
220  
3.320  
3.310  
3.300  
3.290  
3.280  
3.270  
3.260  
3.250  
3.240  
3.230  
3.220  
3.3V Device  
VIN = 4.3V  
IL = 10mA  
CL = 10µF  
210  
200  
190  
180  
3.3V Device  
VIN = 4.3V  
IL = 10mA  
CL = 10µF  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
Temperature (°C)  
Temperature (°C)  
Figure 8. Ground Current vs Temperature at  
ILOAD = 10mA  
Figure 9. Output Voltage vs Temperature at  
ILOAD=10mA  
7.00  
6.80  
30  
29  
3.3V Device  
3.3V Device  
VIN = 4.3V  
IL = 500mA  
CL = 10µF  
VIN = 3.2V  
6.60  
6.40  
6.20  
6.00  
5.80  
5.60  
5.40  
5.20  
5.00  
28  
27  
26  
25  
24  
23  
22  
21  
20  
IL = 750mA  
CL = 10µF  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
Temperature (°C)  
Temperature (°C)  
Figure 10. Ground Current vs Temperature at  
ILOAD=500mA  
Figure 11. Ground Current vs Temperature in Dropout  
at ILOAD=750mA  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
4
TYPICAL PERFORMANCE CHARACTERISTICS  
100  
95  
52.0  
50.0  
48.0  
46.0  
44.0  
42.0  
40.0  
38.0  
36.0  
90  
85  
3.3V Device  
80  
3.3V Device  
V
IN = 4.3V  
VIN = 3.2V  
IL=1.5A  
CL = 10µF  
IL = 1.5A  
75  
CL = 10µF  
70  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
Temperature (°C)  
Temperature (°C)  
Figure 12. Ground Current vs Temperature at ILOAD= 1.5A  
Figure 13. Ground Current vs Temperature in Dropout  
at ILOAD=1.5A  
350  
330  
310  
290  
270  
250  
230  
500  
480  
460  
440  
420  
400  
3.3V Device  
IL = 1.5A  
380  
360  
340  
320  
3.3V Device  
IL = 750mA  
CL = 10µF  
210  
190  
170  
150  
CL = 10µF  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
Temperature (°C)  
Temperature (°C)  
Figure 14. Dropout Voltage vs Temperature at  
ILOAD= 750mA  
Figure 15. Dropout Voltage vs Temperature at  
ILOAD= 1.5mA  
35  
30  
25  
20  
15  
2.00  
1.90  
3.3V Device  
1.80  
1.70  
1.60  
1.50  
1.40  
1.30  
1.20  
1.10  
1.00  
VIN = 3.2V  
IL = 750mA  
CL = 10µF  
10  
5
3.3V Device  
VIN = 3.2V  
IL = 750mA  
CL = 10µF  
0
-40  
100  
120  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
-20  
0
20  
40  
60  
80  
Temperature (°C)  
Temperature (°C)  
Figure 16. Enable Current vs Temperature for VEN= 16V  
Figure 17. Enable Threshold vs Temperature  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
5
APPLICATION INFORMATION  
For example, TO-220 design:  
Assume that V = 10V, VOUT = 5V, IOUT = 1.5A,  
TA = 50°C/W, IθNHA= 1°C/W, θCH = 2°C/W, and  
θJC = 3°C/W.  
The SPX3940 incorporates protection against  
over-currentfaults,reversedloadinsertion,over  
temperature operation, and positive and nega-  
tive transient voltage.  
Where TA = ambient temperature  
θ
= heatsink to ambient thermal resistance  
Thermal Considerations  
θCHHA = case to heatsink thermal resistance  
θJC = junction to case thermal resistance  
Although the SPX3940 offers limiting circuitry  
for overload conditions, it is still necessary to  
insure that the maximum junction temperature  
is not exceeded in the application. Heat will  
flow through the lowest resistance path, the  
junction-to-case path. In order to insure the best  
thermal flow of the component, proper mount-  
ing is required. Consult heatsink manufacturer  
for thermal resistance and design of heatsink.  
The power calculated under these conditions is:  
PD = (VIN - VOUT) * IOUT = 7.5W.  
And the junction temperature is calculated as  
T = TA + PD * (θHA + θ + θJC) or  
TJJ = 50 + 7.5 * (1 + 2 +C3H) = 95°C  
Reliable operation is insured.  
SPX3940  
1
3
VOUT  
V
IN  
+
+
2
10µF  
6.8µF  
Figure 18. Fixed Output Linear Regulator.  
Capacitor Requirements  
The output capacitor is needed to insure stability and minimize the output noise. The value of the  
capacitorvarieswiththeload. However,aminimumvalueof10µFaluminumcapacitorwillguarantee  
stability over all load conditions. A tantalum capacitor is recommended if a faster load transient  
response is needed.  
If the power source has a high AC impedance, a 0.1µF ceramic capacitor between input & ground is  
recommended.  
Minimum Load Current  
To ensure a proper behavior of the regulator under light load, a minimum load of 5mA for SPX3940  
is required.  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
6
PACKAGE: TO-263  
E
Seating  
Plane  
A
E/2  
C2  
L1  
SIDE VIEW  
H
D
Chamfer  
Optional  
1
2
3
c
e
See Detail C  
b
b2  
Gauge Plane  
Seating  
Plane  
FRONT VIEW  
θ
L3  
A1  
L
DETAIL C  
Thermal  
Pad  
3 Pin TO-263 JEDEC TO-263  
Variation AA  
Millimeters  
Conversion Factor:  
1 Inch = 25.40 mm  
(L1)  
Inches  
Controlling Dimension  
SYMBOL  
MIN  
NOM  
-
-
-
-
-
-
-
MAX  
0.190  
0.010  
0.039  
0.070  
0.029  
0.065  
0.380  
-
MIN  
4.06  
0.00  
0.51  
1.14  
0.38  
1.14  
8.38  
6.86  
9.65  
6.22  
NOM  
-
-
-
-
-
-
-
MAX  
D1  
A
A1  
b
b2  
c
c2  
D
D1  
E
0.160  
0.000  
0.020  
0.045  
0.015  
0.045  
0.330  
0.270  
0.380  
0.245  
4.83  
0.25  
0.99  
1.78  
0.74  
1.65  
9.65  
-
-
-
-
-
-
-
0.420  
-
10.67  
-
E1  
e
.100 BSC  
2.54 BSC  
H
L
L1  
L3  
O
0.575  
0.070  
-
-
-
-
0.625  
0.110  
0.066  
14.61  
1.78  
-
-
-
-
15.88  
2.79  
1.68  
BACK  
VIEW  
.010 BSC  
-
0.25 BSC  
-
0˚  
8˚  
0˚  
8˚  
E1  
SIPEX Pkg Signoff Date/Rev:  
JL Aug5-05 / Rev A  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
7
PACKAGE: 3 PIN TO-220  
Thermal  
Pad  
E
E2  
øP  
Q
(H1)  
D2  
D
D1  
1
L1  
FRONT  
VIEW  
b2  
BACK  
VIEW  
L
e1  
E1  
e
b
Seating  
Plane  
A
3 Pin TO-220  
JEDEC TO-220  
Variation AB  
Dimensions in Millimeters:  
Conversion Factor:  
A1  
Dimensions in Inches:  
Controlling Dimension  
SYMBOL  
1 Inch = 25.40 mm  
MIN  
0.140  
0.020  
0.080  
0.015  
0.045  
0.014  
0.560  
0.330  
0.480  
0.380  
0.270  
-
NOM  
-
-
-
0.027  
0.057  
-
-
-
-
-
-
MAX  
0.190  
0.055  
0.115  
0.040  
0.070  
0.024  
0.650  
0.355  
0.507  
0.420  
0.350  
0.030  
MIN  
3.56  
0.51  
2.03  
0.25  
1.14  
0.25  
14.22  
8.38  
12.19  
9.65  
6.86  
-
NOM  
-
-
-
0.51  
1.45  
-
-
-
-
-
-
MAX  
4.83  
1.27  
2.79  
1.02  
1.78  
0.51  
16.51  
8.89  
12.70  
10.67  
8.89  
0.76  
H1  
A
A1  
A2  
b
b2  
c
SIDE  
VIEW  
Chamfer  
Optional  
D
D1  
D2  
E
E1  
E2  
e
-
-
.100 BSC  
2.54 BSC  
e1  
H1  
L
L1  
ΦP  
Q
.200 BSC  
5.08 BSC  
0.230  
0.500  
-
0.139  
0.100  
-
-
-
-
-
0.270  
0.580  
0.250  
0.161  
0.135  
5.84  
12.70  
-
3.30  
2.54  
-
-
-
-
-
6.86  
14.73  
6.35  
4.06  
3.30  
C
A2  
SIPEX Pkg Signoff Date/Rev:  
JL Aug4-05 / Rev A  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
8
PACKAGE: 3 PIN SOT223  
D
b2  
E
E1  
3
2
1
e
e1  
TOP VIEW  
b
Gauge Plane  
A2  
A
L2  
c
A1  
ø
L
Seating Plane  
FRONT VIEW  
3 Pin SOT-223  
JEDEC TO-261  
Variation AA  
Inches  
Conversion Factor:  
1 Inch = 25.40 mm  
Millimeters  
Controlling Dimension  
SYMBOL  
MIN  
-
NOM  
-
-
1.60  
0.76  
3.00  
0.30  
6.50  
7.00  
MAX  
MIN  
-
NOM  
-
-
0.063  
0.030  
0.118  
0.012  
0.256  
0.276  
MAX  
0.071  
0.004  
0.067  
0.033  
0.122  
0.014  
0.264  
0.287  
0.146  
A
A1  
A2  
b
b2  
c
D
E
E1  
e
e1  
L
1.80  
0.10  
1.70  
0.84  
3.10  
0.35  
6.70  
7.30  
3.70  
0.02  
1.50  
0.66  
2.90  
0.23  
6.30  
6.70  
3.30  
0.001  
0.060  
0.026  
0.114  
0.010  
0.248  
0.264  
0.130  
3.50  
0.138  
2.30 BASIC  
4.60 BASIC  
-
0.25 BASIC  
-
0.091 BASIC  
0.182 BASIC  
-
0.010 BASIC  
-
0.75  
0º  
-
0.030  
0º  
-
L2  
ø
10º  
10º  
SIPEX Pkg Signoff Date/Rev:  
JL Aug8-05/Rev A  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
9
PINOUTS  
TO-263-3 Package (T)  
TO-220-3 Package (U)  
SOT-223 (M3)  
1
2
3
1
2
3
1
2 3  
V
V
GND  
IN  
OUT  
V
GND V  
OUT  
IN  
V GND V  
IN  
OUT  
Front View  
TAB=GND  
Front View  
TAB=GND  
Top View  
TAB=GND  
ORDERING INFORMATION  
PART NUMBER  
SPX3940AU-1-8  
SPX3940AU-2-5  
SPX3940AU-3-3  
SPX3940AU-5-0  
SPX3940AT-1-8  
SPX3940AT-1-8/TR  
SPX3940AT-2-5  
SPX3940AT-2-5/TR  
SPX3940AT-3-3  
SPX3940AT-3-3/TR  
SPX3940AT-5-0  
SPX3940AT-5-0/TR  
SPX3940U-1-8  
ACC.  
1%  
1%  
1%  
1%  
1%  
1%  
1%  
1%  
1%  
1%  
1%  
1%  
2%  
2%  
2%  
2%  
OUTPUT VOLTAGE  
PACKAGE  
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 TO-263  
3 lead TO-220  
3 lead TO-220  
3 lead TO-220  
3 lead TO-220  
1.8V  
2.5V  
3.3V  
5.0V  
1.8V  
1.8V  
2.5V  
2.5V  
3.3V  
3.3V  
5.0V  
5.0V  
1.8V  
2.5V  
3.3V  
5.0V  
SPX3940U-2-5  
SPX3940U-3-3  
SPX3940U-5-0  
Available in lead free packaging. To order add "-L" suffix to part number.  
Example: SPX3940AT-3-3/TR = standard; SPX3940AT-L-3-3/TR = lead free  
/TR = Tape and Reel  
Pack quantity is 500 for TO-263 and 2,500 for SOT-223.  
Sipex Corporation  
Headquarters and  
Sales Office  
233 South Hillview Drive  
Milpitas, CA 95035  
TEL: (408) 934-7500  
Solved By SipexTM  
FAX: (408) 935-7600  
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 herein; neither does it convey any license under its patent rights nor the rights of others.  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
10  
ORDERING INFORMATION  
PART NUMBER  
SPX3940T-1-8  
ACC.  
2%  
2%  
2%  
2%  
2%  
2%  
2%  
2%  
1%  
1%  
1%  
1%  
1%  
1%  
1%  
1%  
2%  
2%  
2%  
2%  
2%  
2%  
2%  
2%  
OUTPUT VOLTAGE  
PACKAGE  
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 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  
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  
3 lead SOT-223  
3 lead SOT-223  
1.8V  
1.8V  
2.5V  
2.5V  
3.3V  
3.3V  
5.0V  
5.0V  
1.8V  
1.8V  
2.5V  
2.5V  
3.3V  
3.3V  
5.0V  
5.0V  
1.8V  
1.8V  
2.5V  
2.5V  
3.3V  
3.3V  
5.0V  
5.0V  
SPX3940T-1-8/TR  
SPX3940T-2-5  
SPX3940T-2-5/TR  
SPX3940T-3-3  
SPX3940T-3-3/TR  
SPX3940T-5-0  
SPX3940T-5-0/TR  
SPX3940AM3-1-8  
SPX3940AM3-1-8/TR  
SPX3940AM3-2-5  
SPX3940AM3-2-5/TR  
SPX3940AM3-3-3  
SPX3940AM3-3-3/TR  
SPX3940AM3-5-0  
SPX3940AM3-5-0/TR  
SPX3940M3-1-8  
SPX3940M3-1-8/TR  
SPX3940M3-2-5  
SPX3940M3-2-5/TR  
SPX3940M3-3-3  
SPX3940M3-3-3/TR  
SPX3940M3-5-0  
SPX3940M3-5-0/TR  
Available in lead free packaging. To order add "-L" suffix to part number.  
Example: SPX3940AM3-3-3/TR = standard; SPX3940AM3-L-3-3/TR = lead free  
/TR = Tape and Reel  
Pack quantity is 500 for TO-263 and 2,500 for SOT-223.  
Sipex Corporation  
Headquarters and  
Sales Office  
233 South Hillview Drive  
Milpitas, CA 95035  
TEL: (408) 934-7500  
Solved By SipexTM  
FAX: (408) 935-7600  
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 herein; neither does it convey any license under its patent rights nor the rights of others.  
Date: 4/14/06 Rev A  
SPX3940 1A Low Dropout Voltage Regulator  
© Copyright 2006 Sipex Corporation  
11  

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