SPX431A SIPEX [Sipex Corporation], SPX431A Datasheet

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SPX431A

Manufacturer Part Number
SPX431A
Description
Precision Adjustable Shunt Regulator
Manufacturer
SIPEX [Sipex Corporation]
Datasheet

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The SPX431 is a 3-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's thermal stability, wide operating current (150mA) and
temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a low
cost, high performance solution. SPX431A 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 V
resistors. The SPX431 is available in TO-92, SOIC-8, SOT-89, and SOT-23-5 packages.
Date: 1/19/05
FEATURES
Trimmed Bandgap to 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
Offered in TO-92, SOIC, SOT-89,
SOT-23-5
Improved Replacement in Performance for
TL431
Low Cost Solution
Reference
(R)
®
Precision Adjustable Shunt Regulator
2.5V
SPX431A,B,C Precision Adjustable Shunt Regulator
+
-
Cathode (K)
1
Anode (A)
APPLICATIONS
Now Available in Lead Free Packaging
Refer to page 3 for pinouts.
Battery Operating Equipment
Adjustable Supplies
Error Amplifiers
Single Supply Amplifier
Monitors / VCRs / TVs
Personal Computers
Switching Power Supplies
TYPICAL APPLICATIONS CIRCUIT
REF
and 36 volts with two external
SPX431A,B,C
© Copyright 2005 Sipex Corporation
DESCRIPTION

Related parts for SPX431A

SPX431A Summary of contents

Page 1

... The SPX431's thermal stability, wide operating current (150mA) and temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a low cost, high performance solution. SPX431A 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 ...

Page 2

... 0V 36V REF KA 2 ƒ = 1kHz 150mA K SPX431A,B,C Precision Adjustable Shunt Regulator 2 ........................................................... 150 °C J .............................................. -65 to 150 °C STG 0 0 TYPICAL DERATING JA JC 160°C/W 80°C/W 6.3 mW/°C 575°C/W 150°C/W 1.7 mW/°C 175°C/W 45°C/W 5.7 mW/° ...

Page 3

... 150mA K ° 105 SOT-23-5 (M5) SOT-89 (M1) REF ANODE 5 4 SPX431 SPX431 REF N/C N/C CATHODE ANODE Top View Top View SPX431A,B,C Precision Adjustable Shunt Regulator 3 MIN TYP MAX UNITS 2.445 2.495 2.545 V V 0.07 0.20 mV/°C -2.7 -1.0 mV/V -2.0 -0.4 0.3 0.7 4.0 µA 0.4 1.2 µA 0.4 1.0 mA 0.04 1000 nA ...

Page 4

... REF 2.53 2.52 2.51 2.50 2.49 2.48 2.47 2.46 2. -60 Figure 6. Reference Voltage VS Ambient Tempetature 3.0 2.5 2.0 1.5 1.0 0.5 0 2.0 3.0 Figure 8. Reference Input Current VS Ambient Temperature SPX431A,B,C Precision Adjustable Shunt Regulator (OFF) Figure 4. Test Circuit for I KOFF REF I = 10mA K - 120 T Ambient Temperature (° 10kΩ ...

Page 5

... START 10.000Hz Figure 12. Small Signal Gain and Phase VS Frequency 10mA OUT 230Ω GND Figure 14 100kHz SPX431A,B,C Precision Adjustable Shunt Regulator REF I = 10mA 25°C A 100 1K 10K 100K f Frequency (Hz) /DIV MARKER 19 422 611 ...

Page 6

... GND Figure 16. Stability Boundry Conditions 100 10 1 0.1 0.01 1K Figure 18. Dynamic Output Impedance 100mA 100 150 Figure 20. Shunt Regulator V SPX431A,B,C Precision Adjustable Shunt Regulator REF = =10mA KA K =10V at I =10mA KA K =15V at I =10mA STABLE A STABLE 25° ...

Page 7

... Off-Line DC-DC Converters 0.1% R2 0.1% V OUT Figure 24. High Current Shunt regulator V = (1+R1/R2)V OUT * Resistor values are chosen such that the effect to is negligible . I REF V OUT SPX431A,B,C Precision Adjustable Shunt Regulator 7 V OUT R3 R1 0.1% R3 sets feedback gain, C1 provides feedback compensation SPX431A,B,C R2 0.1% V RTN OUT ...

Page 8

... Seating Plane NOM MAX - 1. 0. 0.51 - 0.24 - 1.27 - 8º - 15º BASE METAL SPX431A,B,C Precision Adjustable Shunt Regulator 8 PACKAGE: 8 PIN NSOIC Ø Ø1 L1 Gauge Plane VIEW C Seating Plane SIDE VIEW SEE VIEW SECTION B-B WITH PLATING © Copyright 2005 Sipex Corporation Ø ...

Page 9

... Date: 1/19/05 E Seating Plane Ø MAX 1.45 0.15 1.3 0.5 A 0.22 A1 0.6 WITH PLATING 8º 15º c BASE METAL SPX431A,B,C Precision Adjustable Shunt Regulator 9 PACKAGE: 5 PIN SOT-23 SEE VIEW C VIEW A-A Ø Gauge Plane L L Ø L1 VIEW C A2 Seating Plane SIDE VIEW b SECTION B-B © Copyright 2005 Sipex Corporation ...

Page 10

... Ø1 Pin SOT-89 MIN NOM SYMBOL b 0.36 0. 0.41 0.47 C 0.38 0.4 D 4.4 4.5 D1 1.4 1 2.4 2.5 e 1.45 1.5 e1 2.9 3 Note: Dimensions in (mm) Date: 1/19/ 5º(2x) L 8º(2x) MAX 0.48 1.2 0.53 Ro.15 0.43 4.6 1.75 4.25 2.6 1.55 b 3.1 SPX431A,B,C Precision Adjustable Shunt Regulator 10 PACKAGE: 3 PIN SOT- © Copyright 2005 Sipex Corporation ...

Page 11

... Pin TO-92 MIN NOM SYMBOL A 0.17 b 0.014 E 0.13 e 0.95 e1 0.045 L 0.5 R 0.085 S1 0.045 W 0.016 D 0.175 a 4º Note: Dimensions in (inches) Date: 1/19/05 L MAX - 0.195 - 0.02 - 0.155 - 0.105 - 0.055 - 0.61 - 0.095 E - 0.06 - 0.022 - 0.195 - 6º SPX431A,B,C Precision Adjustable Shunt Regulator 11 PACKAGE: 3 PIN TO- a(2x) © Copyright 2005 Sipex Corporation D ...

Page 12

... SPX431AM5/TR .................. 0.5% ..................... 2.503V ......................... 5-Pin SOT-23 SPX431AM1 ........................ 0.5% ..................... 2.503V ......................... 3-Pin SOT-89 SPX431AM1/TR .................. 0.5% ..................... 2.503V ......................... 3-Pin SOT-89 SPX431AS .......................... 0.5% ..................... 2.503V ............................. 8-Pin SOIC SPX431AS/TR ..................... 0.5% ..................... 2.503V ............................. 8-Pin SOIC SPX431AN .......................... 0.5% ..................... 2.503V ........................... 3-Pin TO-92 SPX431AN/TR .................... 0.5% ..................... 2.503V ........................... 3-Pin TO-92 SPX431BM5 ........................ 1.0% ..................... 2.495V ......................... 5-Pin SOT-23 SPX431BM5/TR .................. 1.0% ..................... 2.495V ......................... 5-Pin SOT-23 SPX431BM1 ........................ 1.0% ..................... 2.495V ......................... 3-Pin SOT-89 SPX431BM1/TR .................. 1.0% ..................... 2.495V ......................... 3-Pin SOT-89 SPX431BS ...

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