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SPX431C 데이터시트 PDF




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부품번호 SPX431C 기능
기능 (SPX431A/B/C) Precision Adjustable Shunt Regulator
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SPX431C 데이터시트, 핀배열, 회로
www.DataSheet4U.com
SPX431A,B,C
Precision Adjustable Shunt Regulator
FEATURES
• Trimmed Bandgap: 0.5%, 1% and 2%
• Wide Operating Current: 1mA to 150mA
• Extended Temperature Range:
0°C to 105°C
• Low Temperature Coefficient: 30 ppm/°C
• Improved Replacement in Performance
for TL431
• Low Cost Solution
• Available in Lead Free, RoHS compliant
packaging: SOIC, SOT-89, SOT-23-3,
SOT-23-5, and TO-92
APPLICATIONS
• Battery Operated Equipment
• Adjustable Supplies
• Switching Power Supplies
• Error Amplifiers
• Single Supply Amplifier
• Monitors/VCRs/TVs
• Personal Computers
DESCRIPTION
The SPX431 is a three-terminal adjustable shunt voltage regulator providing a highly accurate
bandgap reference. The SPX431 acts as an open-loop error amplifier with a 2.5V temperature
compensation reference. The SPX431 has thermal stability, wide operating current of 150mA
and broad temperature range of 0°C to 150°C, making it suitable for a variety of applications
which require a low-cost, high performance solution. SPX431A tolerance of 0.5% is proven
to be sufficient to overcome all other errors in the system to virtually eliminate the need for
trimming in the power supply manufacturer's assembly line and contribute a significant cost
savings. The output voltage may be adjusted to any value between VREF and 36 volts with
two external resistors. The SPX431 is available in SOIC-8, SOT-23-3, SOT-23-5, SOT89,
and TO-92 packages.
typical applications circuit
Cathode (K)
Reference
(R)
Rev F: Nov 21-06
+
-
2.5V
Anode (A)
SPX431A,B,C Precision Adjustable Shunt Regulator

© 2006 Sipex Corporation




SPX431C pdf, 반도체, 판매, 대치품
Typical Performance CHARACTERISTICS
150
VKA = VREF
125 Temperature Range: 0°C to 105°C
100
75
50
25
0
-25
-50
-75
-100
-2
-1 0 1 2
VKA - Cathode Voltage (V)
High Current Operating Characteristics
3
2.53
2.52
2.51
VKA = VREF
IK = 10mA
2.50
2.49
2.48
2.47
2.46
2.45
-60
-30 0 30 60 90
TA Ambient Temperature (°C)
120
Reference Voltage vs. Ambient Temperature
900
800
700
600
500
400
300
200
100
0
-100
-200
-1.0
VKA = VREF
0° to 105°C
105°C
25°C
-0°C
0 1.0 2.0
VKA Cathode Voltage (V)
Low Current Operating Characteristics
3.0
3.0
R1 = 10kΩ
2.5
R2 = ∞
IK = 10mA
2.0
1.5
1.0
0.5
0
-60 -30 0 30 60 90
TA Ambient Temperature (°C)
120
Reference Input Current vs. Ambient Temperature
0
-10
0°C
-20 25°C
-30
IKA = 10mA
-40
75°C
125°C
-50
03
6 9 12 15 18 21 24 27 30
VKA Cathode Voltage (V)
Reference Voltage Line Regulation vs, Cathode Volt-
age and Tambient
70
60
50
40
30
20
VKA = VREF
10 IK = 10mA
TA = 25°C
0
f Frequency (Hz)
Noise Voltage vs. Frequency
Rev F: Nov 21-06
SPX431A,B,C Precision Adjustable Shunt Regulator

© 2006 Sipex Corporation

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SPX431C 전자부품, 판매, 대치품
VIN
R5
R4
Typical Performance CHARACTERISTICS (continued)
VIN VOUT
R1
0.1%
R3
SPX431A,B,C
C1 R1 R3
0.1%
R2
0.1%
VOUT
R2
0.1%
SPX431A,B,C
Q1
Figure 23. Precision High Current Series Regulator
Vout = (1+R1/R2)Vref
VCC
Figure 24. High Current Shunt Regulator
Vout = (1+R1/R2)Vref
* Resistor values are chosen such that the ef-
fect to Iref is negligible.
R2
VIN R1
SPX431A,B,C
VOUT
Figure 25. Single Supply Comparator with Tempera-
ture Compensated Threshold. Vin Threshold = 2.5V
Rev F: Nov 21-06
SPX431A,B,C Precision Adjustable Shunt Regulator

© 2006 Sipex Corporation

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