SPX1431N [SIPEX]

Precision Adjustable Shunt Regulator; 精密可调并联稳压器
SPX1431N
型号: SPX1431N
厂家: SIPEX CORPORATION    SIPEX CORPORATION
描述:

Precision Adjustable Shunt Regulator
精密可调并联稳压器

稳压器 电源电路 参考电压源 输出元件
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®
SPX1431  
Precision Adjustable Shunt Regulator  
FEATURES  
APPLICATIONS  
Trimmed Bandgap Reference to 0.4%  
Wide Operating Current 1mA to 150mA  
Battery Operating Equipment  
Adjustable Supplies  
Extended Temperature Range:  
-55°C to 125°C  
Low Temperature Coefficient 30 ppm/°C  
Switching Power Supplies  
Error Amplifiers  
Single Supply Amplifier  
Monitors / VCRs / TVs  
Personal Computers  
Offered in TO-92, SOIC, SOT-89,  
SOT-23-5  
Improved Replacement in Performance for  
LT1431  
Low Cost Solution  
DESCRIPTION  
The SPX1431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate  
bandgap reference. The SPX1431 acts as an open-loop error amplifier with a 2.5V temperature  
compensation reference. The SPX1431's thermal stability, wide operating current (150mA)  
and temperature range (-55°C to 125°C) makes it suitable for a variety of applications that  
require a low cost, high performance solution. SPX1431 tolerance of 0.4% is proven to be  
sufficient to overcome all of the other errors in the system to virtually eliminate the need for  
trimming in the power supply manufacturer's assembly lines and contributes a significant cost  
savings.  
The output voltage may be adjusted to any value between VREF and 36 volts with two external  
resistors. The SPX1431 is available in TO-92, SOIC-8, SOT-89, and SOT-23-5 packages.  
BLOCK DIAGRAM  
Cathode (K)  
Reference  
(R)  
+
-
2.5V  
Anode (A)  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
1
ABSOLUTE MAXIMUM RATINGS  
RECOMMENDED CONDITIONS  
Cathode-Anode Reverse Breakdown VKA ....................................... 37V  
Anode-Cathode Forward Current, (<10ms) IAK ................................. 1A  
Operating Cathode Current IKA .................................................. 150mA  
Reference Input Current IREF ........................................................ 10mA  
Continuous Power Dissipation at 25°C PD  
PARAMETER  
SYMBOL  
VKA  
RATING  
VREF to 36  
10  
UNIT  
V
Cathode Voltage  
Cathode Current  
TO-92 ..................................................................... 775mW  
SOT-23 .................................................................. 200 mW  
SOIC-8 .................................................................... 750mW  
SOT-89 ................................................................. 1000mW  
IK  
mA  
Junction Temperature TJ ........................................................... 150 °C  
Storage Temperature TSTG .............................................. -65 to 150 °C  
Lead Temperature (Soldering 10 sec.) TL .................................. 300°C  
TYPICAL THERMAL RESISTANCES  
PACKAGE  
TO-92  
0JA  
0JC  
TYPICAL DERATING  
6.3 mW/°C  
NOTE: Stresses greater than those listed under ABSOLUTE MAXIMUM  
RATINGS may cause permanent damage to the device. This is a stress  
rating only and functional operation of the device at these or any other  
conditions above those indicated in the operational sections of this  
specification is not implied. Exposure to absolute maximum rating condi-  
tions for extended periods may affect reliability.  
160°C/W 80°C/W  
575°C/W 150°C/W  
175°C/W 45°C/W  
110°C/W 8°C/W  
SOT-23  
SOIC-8  
SOT-89  
1.7 mW/°C  
5.7 mW/°C  
9.1mW/C°  
Typical deratings of the thermal resistances are given for ambient  
temperature >25°C.  
ELECTRICAL CHARACTERISTICS  
Electrical characteristics at 25°C IK = 10mA VK = VREF, unless otherwise specified.  
PARAMETER  
SPX1431  
SYMBOL FIGURE  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
Reference Voltage  
VREF  
TC  
2
2
2.490  
2.465  
2.500  
2.510  
2.535  
V
V
TJ = 0°C to 105°C  
VREF withTemp.*  
2
3
0.07  
-1.1  
0.20  
mV/°C  
Ratio of Change in VREF  
to Cathode Voltage  
VREF  
VK  
Vk = 3V to 36V  
-2.0  
mV/V  
Reference Input Current  
IREF Temp Deviation  
Min IK for Regulation  
Off State Leakage  
IREF  
3
3
2
4
0.7  
0.4  
1.9  
1.2  
1
µA  
µA  
mA  
nA  
IREF  
IK(MIN)  
IK(OFF)  
TJ = 0°C to 105°C  
0.4  
VREF = 0V,  
VKA = 36V  
0.04  
250  
Dynamic Output  
Impedance  
ZKA  
2
ƒz 1kHz  
IK = 1 to 150mA  
0.15  
0.5  
Operating Range (TJ ) = - 55°C to 125°C.  
* See appropiate test circuit (Figure 2)  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
2
CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC)  
mV  
0
ppm  
0
%
0
VREF (mV)  
VREF  
TC in mV/°C =  
TA  
T
VREF  
x 100  
x 106  
-10  
(
VREF at 25°C  
)
)
TC in %/°C =  
5000  
0.5  
TA  
VREF  
(
VREF at 25°C  
TC in ppm/°C =  
0
15  
30  
45  
60  
75  
90  
105  
TA  
Junction Temperature (°C)  
0.07 mV/°C  
0.003 %/°C  
27 ppm/°C  
Figure 1. VREF VS Temperature.  
TEST CIRCUITS  
VIN  
VKA  
=
VREF  
VIN  
VKA  
VIN  
VKA  
IK (OFF)  
R1  
IK  
IREF  
IK  
IREF  
(VREF  
)
R2  
Figure 2. Test Circuit for VKA = VREF  
Figure 3. Test Circuit for VKA > VREF  
Figure 4. Test Circuit for IKOFF  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
3
TYPICAL PERFORMANCE CHARACTERISTICS  
150  
2.53  
2.52  
2.51  
2.50  
2.49  
2.48  
2.47  
2.46  
2.45  
125  
100  
75  
V
= V  
REF  
KA  
V
K
= V  
REF  
KA  
= 10mA  
0°C to 105°C  
I
50  
25  
0
-25  
-50  
-75  
-100  
-2  
-1  
0
1
2
3
-60  
-30  
0
T Ambient Temperature (°C)  
A
30  
60  
90  
120  
V
KA  
Cathode Voltage (V)  
Figure 5. High Current Operating Characteristics  
Figure 6. Reference Voltage VS Ambient Tempetature  
900  
800  
3.0  
V
KA  
= V  
REF  
0° to 105°C  
700  
600  
500  
400  
300  
200  
100  
0
R1 = 10k  
R2 = ∞  
K
2.5  
I
= 10mA  
2.0  
1.5  
1.0  
0.5  
0
105°C  
25°C  
-0°C  
-100  
-200  
-60  
-30  
0
30  
60  
90  
120  
-1.0  
0
1.0  
2.0  
3.0  
T
Ambient Temperature (°C)  
A
V
KA  
Cathode Voltage (V)  
Figure 8. Reference Input Current VS Ambient  
Temperature  
Figure 7. Low Current Operating Characteristics  
70  
60  
50  
40  
30  
20  
0
-10  
0°C  
-20  
-30  
-40  
25°C  
75°C  
125°C  
I
= 10mA  
KA  
VKA = VREF  
10 IK = 10mA  
TA = 25°C  
0
10  
-50  
0
100  
1K  
10K  
100K  
3
6
9
12 15 18 21 24 27 30  
V
KA  
Cathode Voltage (V)  
f Frequency (Hz)  
Figure 10. Noise Voltage VS Frequency  
Figure 9. Reference Voltage Line Regulation VS  
Cathode Voltage and TAMBIENT  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
4
TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
REF LEVEL  
60.000dB  
0.0deg  
/DIV  
10.000dB  
45.000deg  
MARKER 19 422 611.000Hz  
MAG (A/R) -0.125dB  
MARKER 19 422 611.000Hz  
0.150  
0.125  
0.100  
0.075  
0.050  
0.025  
0.0  
V
= V  
REF  
KA  
PHASE (A/R)  
46.717deg  
I
= 1 to 100mA  
K
f1kHz  
PHASE  
GAIN  
-60  
-30  
0
30  
60  
90  
120  
10  
100  
1K  
10K  
100K  
1M  
10M  
T
Free Air Temperature  
A
START 10.000Hz  
STOP 50 000 000.000Hz  
Figure 12. Small Signal Gain and Phase VS Frequency;  
IK = 10mA, TA = 25°C  
Figure 11. Low Frequency Dynamic Output Impedance  
VS TAMBIENT  
VOUT  
V
IN  
230  
IK  
15kΩ  
9µF  
V
OUT  
VIN  
8.25kΩ  
GND  
Figure 13. Test Circuit for Gain and Phase Frequency  
Response  
Figure 14. Frequency = 100kHz, IK = 10mA, TA = 25°C  
100  
VIN  
A: V = V  
KA  
REF  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
B: V = 5V at I =10mA  
250Ω  
KA  
K
C: V =10V at I =10mA  
KA  
K
D: V =15V at I =10mA  
KA  
K
VOUT  
C
IK  
STABLE  
STABLE  
fp = 100kHz  
A
50Ω  
T
A = 25°C  
B
D
100 101 102  
103 104 105 106 107  
GND  
C
L
Load Capacitance (pF)  
Figure 16. Stability Boundary Conditions  
Figure 15. Test Circuit for Pulse Response  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
5
TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
100  
150  
TA = 25 °C  
IK  
=
1mA to 100mA  
IK  
10  
1.0  
R
CL  
10kΩ  
0.1  
0.01  
1K  
10K  
100K  
1M  
10M  
f - Frequency (Hz)  
Figure 18. Dynamic Output Impedance TA = 25°C,  
Figure 17. Test Circuit for Stability  
IK = 1 to 100mA  
100  
R3  
V
V
IN  
OUT  
10  
R1  
0.1%  
V
V
= 36V  
KA  
= 0V  
REF  
1
V
REF  
SPX1431  
0.1  
R2  
0.1%  
0.01  
-50  
0
50  
100  
150  
T
Ambient Temperature (°C)  
A
Figure 19. Off State Leakage  
Figure 20. Shunt Regulator VOUT = (1+R1/R2)VREF  
V
V
OUT  
IN  
I
SINK  
Q1  
R3  
R2  
R1  
0.1%  
Opto Isolator  
R3 sets feedback gain,  
C1 provides feedback  
compensation  
Isolated  
Feedback  
SPX1431  
C1  
+
C2  
R1  
0.1%  
SPX1431  
R2  
0.1%  
V
RTN  
OUT  
Figure 22. Reference Amplifier for Isolated Feedback in  
Off-Line DC-DC Converters  
Figure 21. Constant Current, Sink, ISINK = VREF/R1  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
6
TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
V
IN  
V
IN  
V
OUT  
R5  
R1  
0.1%  
R4  
R3  
R2  
0.1%  
Q1  
R3  
R1  
0.1%  
C1  
V
OUT  
SPX1431  
SPX1431  
R2  
0.1%  
Figure 24. High Current Shunt Regulator  
VOUT = (1+R1/R2)VREF  
Figure 23. Precision High Current Series Regulator  
VOUT = (1+R1/R2)VREF  
V
CC  
R2  
* Resistor values are chosen such that the effect to  
REF is negligible.  
I
V
OUT  
R1  
V
IN  
SPX1431  
Figure 25. Single Supply Comparator with Temperature  
Compensated Threshold. VIN threshold = 2.5V  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
7
PACKAGES  
SOT-23-5 (M5)  
SOT-89 (M1)  
8-Pin Surface Mount (S)  
TO-92 (N)  
REF  
ANODE  
1
2
3
5
4
REF  
1
2
3
4
8
7
6
5
CATHODE  
ANODE  
ANODE  
N/C  
1
3
2
ANODE  
ANODE  
N/C  
3
1
2
CATHODE  
REF  
REF  
CATHODE  
N/C  
N/C CATHODE  
ANODE  
ANODE  
Top View  
Top View  
Bottom View  
Top View  
PACKAGE:  
8 PIN PLASTIC  
SMALL OUTLINE (SOIC)  
(NARROW)  
4.0 (0.158)  
3.8 (0.150)  
5.2 (0.205)  
4.6 (0.181)  
6.2 (0.244)  
5.8 (0.228)  
Pin 1  
1.27 (0.50)  
BSC  
1.75 (0.069)  
1.35 (0.053)  
0.78 (0.031)  
0.61 (0.024)  
0.77 (0.030)  
0.64 (0.025)  
°
45  
5.0 (0.197)  
4.8 (0.188)  
0.37 (0.015)  
BSC  
°
(4 PLCS)  
7
°
3
-6°  
0.56 (0.022)  
0.49 (0.019)  
0.22 (0.009)  
0.19 (0.007)  
°
7
(4 PLCS)  
0.45 (0.018)  
0.35 (0.014)  
0.20 (0.008)  
0.10 (0.004)  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
8
PACKAGE: 5 Lead SOT23  
C
L
b
e
E
e1  
D
C
L
a
0.20  
C
L
DATUM 'A  
'
A2  
A
C
E1  
L
2
A
A1  
A
.10  
MIN  
0.90  
MAX  
1.45  
SYMBOL  
A
0.00  
0.90  
0.25  
0.09  
2.80  
2.60  
1.50  
0.35  
0.15  
1.30  
0.50  
0.20  
3.10  
3.00  
1.75  
0.55  
A1  
A2  
b
C
D
E
E1  
L
e
0.95ref  
1.90ref  
e1  
a
O
O
0
10  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
9
PACKAGE:  
3 Lead SOT-89  
C
A
C
N
P
2
1
3
K
B
F
D
G
-T-  
STYLE 1  
STYLE 3  
DIM  
MILLIMETERS  
INCHES  
MIN  
4.40  
2.29  
140  
0.36  
1.62  
0.44  
150 BSC  
0.35  
0.80  
MAX  
4.60  
2.60  
160  
0.48  
1.80  
0.53  
MIN  
MAX  
PIN 1. BASE  
PIN 1. GATE  
2. ANODE  
A
B
0.174  
0.091  
0.056  
0.015  
0.064  
0.018  
0.059 BSC  
0.014  
0.032  
0.181  
0.102  
0.062  
0.018  
0.070  
0.020  
2. COLLECTOR  
3. EMITTER  
3. CATHODE  
C
D
E
F
G
J
STYLE 2  
STYLE 4  
PIN 1. ANODE  
2. CATHODE  
PIN 1. DRAIN  
2. GATE  
0.44  
1.04  
0.017  
0.040  
K
L
3. NO CONNECTION  
3. SOURCE  
300 BSC  
0.118 BSC  
N
P
2.04  
3.94  
2.28  
4.25  
0.081  
0.156  
0.089  
0.167  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
10  
PACKAGE: TO-92  
0.090 (2.286) Radius typ.  
2
1
3
0.145 (3.683)  
0.135 (3.429)  
0.055 (1.397)  
0.045 (1.143)  
10° typ.  
BOTTOM VIEW  
0.085 (2.159) Diameter  
0.185 (4.699)  
0.045 (1.143)  
5° typ.  
5° typ.  
0.185 (4.699)  
0.175 (4.445)  
0.090 (2.286) typ.  
Seating Plane  
0.025 (0.635) Max  
Uncontrolled  
Lead Diameter  
0.500 (12.70) Min.  
0.016 (0.406)  
0.014 (0.356)  
0.0155 (0.3937)  
0.0145 (0.3683)  
0.055 (1.397)  
0.045 (1.143)  
0.105 (2.667)  
0.095 (2.413)  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
11  
ORDERING INFORMATION  
PART NUMBER  
ACCURACY  
OUTPUT VOLTAGE  
PACKAGES  
SPX1431M5 ......................... 0.4%.....................2.5V ............................ 5-Pin SOT-23  
SPX1431M1 ......................... 0.4%.....................2.5V ............................ 3-Pin SOT-89  
SPX1431S ............................ 0.4%.....................2.5V ................................ 8-Pin SOIC  
SPX1431N............................ 0.4%.....................2.5V .............................. 3-Pin TO-92  
Co rp o ra tio n  
SIGNAL PROCESSING EXCELLENCE  
Sipex Corporation  
Headquarters and  
Sales Office  
22 Linnell Circle  
Billerica, MA 01821  
TEL: (978) 667-8700  
FAX: (978) 670-9001  
e-mail: sales@sipex.com  
Sales Office  
233 South Hillview Drive  
Milpitas, CA 95035  
TEL: (408) 934-7500  
FAX: (408) 935-7600  
Rev. 08/13/02  
SPX1431 Precision Adjustable Shunt Regulator  
© Copyright 2002 Sipex Corporation  
12  

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