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PDF SPX2431 Data sheet ( Hoja de datos )
| Número de pieza | SPX2431 | |
| Descripción | Precision Adjustable Shunt Regulator | |
| Fabricantes | Sipex Corporation | |
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®
SPX2431
Precision Adjustable Shunt Regulator
FEATURES
■ Trimmed Bandgap to 0.5% and 1.0%
■ Wide Operating Current 1mA to 100mA
■ Extended Temp. Range: 0°C to 105°C
■ Low Temperature Coefficient 30 ppm/°C
■ Offered in 3 Pin SOT-23 (M)
■ Replacement for TL431, AS2431
■ Low Noise Output
APPLICATIONS
■ Battery Operating Equipment
■ Adjustable Supplies
■ Switching Power Supplies
ANODE
3
SPX2431
3 Pin SOT-23
12
REF
Top View
CATHODE
Now Available in Lead Free Packaging
■ Error Amplifiers
■ Single Supply Amplifier
■ Monitors / VCRs / TVs
■ Personal Computers
DESCRIPTION
The SPX2431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate
bandgap reference.The SPX2431 acts as an open-loop error amplifier with a 2.5V temperature
compensation reference.The SPX2431’s thermal stability, wide operating current (100mA) and
temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a
low cost, high performance solution. SPX2431A tolerance of 0.5% 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 line and contribute a significant cost savings.
The output voltage may be adjusted to any value between VREF and 20 volts with two external
resistors. In the standard shunt configuration, the combination of a low temperature coefficient,
sharp turn on characteristics, low output impedance, and programmable output voltage makes
this precision reference an excellent error amplifier. The SPX2431 is available in SOT-23-3
package.
FUNCTIONAL DIAGRAM
Cathode (K)
Reference
(R)
Date: 1/19/05
2.5V
+
-
Anode (A)
SPX2431 Precision Adjustable Shunt Regulator
1
© Copyright 2005 Sipex Corporation
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
0.150
0.125
0.100
VKA = VREF
IK = 1 to 100mA
f≤1kHz
0.075
0.050
0.025
0.0
-60
-30 0 30 60 90
TA Free Air Temperature
120
Figure 11. Low Frequency Dynamic Output Impedance
VS TAMBIENT
REF LEVEL
60.000dB
0.0deg
60dB
/DIV
10.000dB
45.000deg
MARKER 25 297 698.000 Hz
MAG (A/R)
-0.025 dB
MARKER 25 297 698.000 Hz
PHASE (A/R)
93.320 deg
50dB
40dB
30dB
20dB
10dB
0dB
PHASE
GAIN
-10dB
-20dB
-30dB
-40dB
10
100
START 10.000Hz
1K
10K 100K 1M 10M
STOP 50 000 000.000Hz
215°
180°
135°
90°
45°
0°
-45°
-90°
-135°
-180°
-215°
Figure 12. Small Signal Gain and Phase VS Frequency;
IK = 10mA, TA = 25°C
9µF 15kΩ
IK
VIN
8.25kΩ
VOUT
230Ω
GND
VIN
VOUT
Figure 13. Test Circuit for Gain and Phase Frequency
Response
VIN
250Ω
VOUT
IK
fp = 100kHz
50Ω
Figure 15. Test Circuit for Pulse Response
GND
Figure 14. Frequency = 100kHz, IK = 10mA, TA = 25°C
100
90
A: VKA = VREF
B: VKA= 5V at IK=10mA
80
C: VKA=10V at IK=10mA
D: VKA=15V at IK=10mA
70
60
C
50
40
STABLE
A
30
STABLE
20
10
0
100
TA = 25°C
B
D
101 102 103 104 105 106
CL Load Capacitance (pF)
107
Figure 16. Stability Boundary Conditions
Date: 1/19/05
SPX2431 Precision Adjustable Shunt Regulator
5
© Copyright 2005 Sipex Corporation
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet SPX2431.PDF ] | |
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