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FAN431_11 [FAIRCHILD]

Programmable Shunt Regulator; 可编程并联稳压器
FAN431_11
型号： FAN431_11
厂家： FAIRCHILD SEMICONDUCTOR    FAIRCHILD SEMICONDUCTOR
描述：

Programmable Shunt Regulator
可编程并联稳压器

稳压器
文件： 总10页 (文件大小：123K)
中文：  中文翻译
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www.fairchildsemi.com  
FAN431/FAN431A/FAN431L  
Programmable Shunt Regulator  
Features  
Description  
• Programmable Output Voltage to 36 Volts  
• Low Dynamic Output Impedance 0.2Ω Typical  
• Sink Current Capability of 1.0 to 100mA  
• Equivalent Full-Range Temperature Coefficient of  
50ppm/°C Typical  
• Temperature Compensated for Operation Over Full Rated  
Operating Temperature Range  
• Low Output Noise Voltage  
The FAN431/FAN431A/FAN431L are three terminal  
output adjustable regulators with thermal stability over  
operating temperature range. The output voltage can be set  
any value between V  
REF  
(approximately 2.5 volts) and 36  
volts with two external resistors. These devices have a  
typical dynamic output impedance of 0.2Ω. Active output  
circuit provides a sharp turn-on characteristic, making these  
devices excellent replacement for Zener Diodes in many  
applications.  
• Fast Turn-on Response  
TO-92  
1
1. Ref 2. Anode 3. Cathode  
Internal Block Diagram  
CATHODE  
+
-
REFERENCE  
2.5 Vref  
ANODE  
CATHODE (K)  
REFERENCE (R)  
ANODE(A)  
Rev. 1.0.3  
©2011 Fairchild Semiconductor Corporation  
FAN431/FAN431A/FAN431L  
Absolute Maximum Ratings  
(Operating temperature range applies unless otherwise specified.)  
Parameter  
Symbol  
Value  
37  
Unit  
V
Cathode Voltage  
V
KA  
KA  
Cathode current Range (Continuous)  
Reference Input Current Range  
I
-100 ~ +150  
-0.05 ~ +10  
mA  
mA  
I
REF  
Thermal Resistance Junction-Air (Note1,2)  
Z Suffix Package  
R
132  
940  
°C/W  
θJA  
Power Dissipation (Note3,4)  
Z Suffix Package  
P
mW  
D
Junction Temperature  
T
150  
°C  
°C  
°C  
J
Operating Temperature Range  
Storage Temperature Range  
T
-25 ~ +85  
-65 ~ +150  
OPR  
T
STG  
Note:  
1. Thermal resistance test board  
Size: 76.2mm * 114.3mm * 1.6mm (1S0P)  
JEDEC Standard: JESD51-3, JESD51-7  
2. Assume no ambient airflow.  
°
°
3. T  
= 150 C, Ratings apply to ambient temperature at 25 C  
JMAX  
4. Power dissipation calculation: P = (T - T )/R  
θJA  
D
J
A
Recommended Operating Conditions  
Parameter  
Symbol  
Min.  
Typ.  
Max.  
Unit  
V
Cathode Voltage  
Cathode Current  
V
V
-
-
36  
KA  
KA  
REF  
I
1.0  
100  
mA  
2
FAN431/FAN431A/FAN431L  
Electrical Characteristics  
(T = +25°C, unless otherwise specified)  
A
FAN431  
FAN431A  
FAN431L  
Unit  
Parameter  
Symbol  
Conditions  
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.  
Reference  
Input Voltage  
V
REF  
V
=V  
, I =10mA  
2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508  
V
KA REF KA  
Deviation of  
Reference  
Input Voltage  
Over-  
ΔV  
REF  
ΔT  
/
/
V
=V , I =10mA  
KA REF KA  
-
4.5  
17  
-
4.5  
17  
-
4.5  
17  
mV  
T
≤T ≤T  
MIN MAX  
A
Temperature  
Ratio of  
ΔV =10V-  
KA  
-
-
-
-1.0 -2.7  
-0.5 -2.0  
-
-
-
-1.0 -2.7  
-0.5 -2.0  
-
-
-
-1.0 -2.7  
-0.5 -2.0  
V
Change in  
Reference  
Input Voltage  
to the Change  
in Cathode  
Voltage  
REF  
ΔV  
REF  
I
KA  
=10mA  
mV/V  
ΔV  
KA  
ΔV =36V-  
KA  
10V  
Reference  
Input Current  
I
=10mA,  
KA  
I
1.5  
0.4  
4
1.5  
0.4  
4
1.5  
0.4  
4
μA  
μA  
REF  
R =10kΩ,R =∞  
1
2
Deviation of  
Reference  
Input Current  
Over Full  
Temperature  
Range  
I
=10mA,  
KA  
ΔI /ΔT R =10kΩ,R =∞  
REF  
-
-
1.2  
-
-
1.2  
-
-
1.2  
1
2
T =Full Range  
A
Minimum  
Cathode  
Current for  
Regulation  
I
V
=V  
0.45  
1.0  
0.45 1.0  
0.45 1.0  
mA  
KA(MIN)  
KA REF  
Off -Stage  
Cathode  
Current  
I
V
=36V, V  
KA REF  
=0  
-
-
0.05  
0.15  
1.0  
0.5  
-
-
0.05 1.0  
0.15 0.5  
-
-
0.05 1.0  
0.15 0.5  
μA  
KA(OFF)  
Dynamic  
Impedance  
V =V ,  
KA REF  
Z
Ω
KA  
I
=1 to 100mA ,f ≥1.0kHz  
KA  
Note1  
T
MIN  
= -25°C, T  
= +85°C  
MAX  
3
FAN431/FAN431A/FAN431L  
Test Circuits  
FAN431  
FAN431  
Figure 2. Test Circuit for V ≥V  
KA REF  
Figure 1. Test Circuit for V =V  
KA REF  
FAN431  
Figure 3. Test Circuit for l  
KA(OFF)  
4
FAN431/FAN431A/FAN431L  
Typical Performance Characteristics  
800  
600  
400  
200  
0
150  
VKA = VREF  
TA = 25oC  
VKA = VREF  
TA = 25o  
C
100  
50  
IKA(MIN)  
0
-50  
-100  
-200  
-1  
0
1
2
3
-2  
-1  
0
1
2
3
VKA, CATHODE VOLTAGE (V)  
VKA, Cathode Voltage (V)  
Figure 5.  
Figure 4. Cathode Current vs. Cathode Voltage  
Cathode Current vs. Cathode Voltage  
0.100  
0.075  
0.050  
0.025  
0.000  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0.0  
-50  
-50  
-25  
0
25  
50  
75  
100  
125  
-25  
0
25  
50  
75  
100  
125  
TA, Ambient Temperature (oC)  
TA, Ambient Temperature (oC)  
OFF-State Cathode Current vs.  
Ambient Temperature  
Figure 6.  
Figure7. Reference Input Current vs.  
Ambient Temperature  
6
60  
50  
40  
30  
20  
10  
0
TA = 25oC  
IKA = 10mA  
TA=25oC  
5
INPUT  
4
3
OUTPUT  
2
1
0
-10  
1k  
0
4
8
12  
16  
20  
10k  
100k  
1M  
10M  
Time (us)  
Frequency (Hz)  
Pulse Response  
Figure 8. Small Signal Voltage Amplification vs. Frequency  
Figure 9.  
5
FAN431/FAN431A/FAN431L  
Typical Performance Characteristics (Continued)  
5
4
3
2
1
0
140  
A VKA = Vref  
B VKA = 5.0 V @ IK = 10mA  
TA = 25oC  
120  
A
100  
80  
60  
40  
20  
0
stable  
stable  
B
100p  
1n  
10n  
100n  
1ٛ  
10ٛ  
0.0  
0.2  
0.4  
0.6  
0.8  
1.0  
1.2  
1.4  
1.6  
1.8  
2.0  
CL, LOAD CAPACITANCE  
Anode-Ref. Voltage(V)  
Figure 10. Stability Boundary Conditions  
Figure 11. Anode-Reference Diode Curve  
5
4
3
2
1
0
0.0  
0.2  
0.4  
0.6  
0.8  
1.0  
1.2  
1.4  
1.6  
1.8  
2.0  
Ref.-Cathode Voltage(V)  
Figure 12. Reference-Cathode Diode Curve  
6
FAN431/FAN431A/FAN431L  
Typical Application  
R1  
------  
R2  
R1  
R1  
⎛
⎞
⎠
⎛
⎝
⎞
⎠
⎛
⎝
⎞
⎠
VO = Vref 1 +  
------  
------  
VO  
=
1 +  
Vref  
VO  
=
1 +  
Vref  
⎝
R2  
R2  
LM7805/MC7805  
FAN431  
FAN431  
FAN431  
Figure 14. Output Control for  
Figure 13. Shunt Regulator  
Figure 15. High Current Shunt Regulator  
-
Three-Termianl Fixed Regulator  
FAN431  
FAN431  
Figure 17. Constant-Current Sink  
Figure 16. Current Limit or Current Source  
7
FAN431/FAN431A/FAN431L  
Mechanical Dimensions  
Package  
Dimensions in millimeters  
TO-92 Bulk Type  
+0.25  
–0.15  
4.58  
0.46 0.10  
+0.10  
–0.05  
1.27TYP  
[1.27 0.20  
1.27TYP  
0.38  
]
[1.27 0.20]  
3.60 0.20  
(R2.29)  
8
FAN431/FAN431A/FAN431L  
Mechanical Dimensions (Continued)  
Package  
Dimensions in millimeters  
TO-92 Ammo Type & Tape And Reel Type  
9
FAN431/FAN431A/FAN431L  
Ordering Information  
Product Number  
FAN431ZXA  
Output Voltage Tolerance  
Package  
Operating Temperature  
Shipping  
2%  
1%  
FAN431AZXA  
FAN431LZXA  
TO-92  
-25 ~ +85°C  
Ammo Pack  
0.5%  
• For information on tape & reel and ammo pack specifications, including part orientation and tape sizes, please  
refer to our tape and reel data, www.fairchildsemi.com/products/discrete/pdf/to92_tr.pdf.  
DISCLAIMER  
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY  
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD 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.  
LIFE SUPPORT POLICY  
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES  
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR  
CORPORATION. As used herein:  
1. Life support devices or systems are devices or systems  
which, (a) are intended for surgical implant into the body,  
or (b) support or sustain life, and (c) whose failure to  
perform when properly used in accordance with  
instructions for use provided in the labeling, can be  
reasonably expected to result in a significant injury of the  
user.  
2. A critical component in any component of a life support  
device or system whose failure to perform can be  
reasonably expected to cause the failure of the life support  
device or system, or to affect its safety or effectiveness.  
www.fairchildsemi.com  
2/22/11 0.0m 001  
Stock#DSxxxxxxxx  
© 2011 Fairchild Semiconductor Corporation  

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