SPX431LCM1 SIPEX [Sipex Corporation], SPX431LCM1 Datasheet

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SPX431LCM1

Manufacturer Part Number
SPX431LCM1
Description
Precision Adjustable Shunt Regulator
Manufacturer
SIPEX [Sipex Corporation]
Datasheet
Date: 5/25/04
FEATURES
The SPX431L is a 3-terminal adjustable shunt voltage regulator providing a highly accurate
bandgap reference. The SPX431L acts as an open-loop error amplifier with a 2.5V temperature
compensation reference. The SPX431L’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. SPX431L 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 SPX431L is available in TO-92, SOIC-8, SOT-89, and SOT-23-3 packages.
APPLICATIONS
Battery Operating Equipment
Adjustable Supplies
Tight Voltage Tolerance 0.5% at 10mA
Wide Operating Current 1mA to 100mA
Extended Temperature Range:
0°C to 105°C
Low Temperature Coefficient 30 ppm/°C
Improved Replacement in Performance for
TL431 and AS431
Low Cost Solution
Switching Power Supplies
Reference
(R)
®
Precision Adjustable Shunt Regulator
SPX431L Precision Adjustable Shunt Regulator
2.5V
+
-
1
Cathode (K)
Anode (A)
Now Available in Lead Free Packaging
Error Amplifiers
Single Supply Amplifier
Monitors / VCRs / TVs
Personal Computers
REF
REF
1
3 Pin SOT-23
SPX431L
and 20V with two external
ANODE
© Copyright 2004 Sipex Corporation5
CATHODE
BLOCK DIAGRAM
SPX431L
DESCRIPTION

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SPX431LCM1 Summary of contents

Page 1

Precision Adjustable Shunt Regulator FEATURES Tight Voltage Tolerance 0.5% at 10mA Wide Operating Current 1mA to 100mA Extended Temperature Range: 0°C to 105°C Low Temperature Coefficient 30 ppm/°C Improved Replacement in Performance for TL431 and AS431 Low Cost Solution ...

Page 2

ABSOLUTE MAXIMUM RATINGS Cathode-Anode Reverse Breakdown V ....................................... 20V KA Anode-Cathode Forward Current, (<10ms) I ................................. 1A AK Operating Cathode Current I .................................................. 100mA KA Reference Input Current I ........................................................ 10mA REF Continuos Power Dissipation at 25° TO-92 ...

Page 3

Electrical characteristics at 25° 10mA V K PARAMETER SYMBOL SPX431LC Reference Voltage V REF ∆V withTemp.* TC REF Ratio of Change in V ∆ V REF REF to Cathode Voltage ∆V K Reference Input Current I REF I ...

Page 4

REF I I REF K Figure 2. Test Circuit for REF 150 125 REF 0°C to 105°C 100 -25 -50 -75 -100 ...

Page 5

I = 10mA KA -40 - Cathode Voltage (V) KA Figure 9. Reference Voltage Line Regulation VS Cathode Voltage and T AMBIENT 0.150 V = ...

Page 6

V IN 250Ω f 50Ω 100kHz Figure 15. Test Circuit for Pulse Response 150 Ω 10kΩ Figure 17. Test Circuit for Stability 100 20V REF 1 0.1 0.01 ...

Page 7

SPX431L Figure 21. Constant Current Sink, I SINK 0.1% SPX431L R2 0.1% Figure 23. Precision High Current Series Regulator V = (1+R1/R2)V OUT REF ...

Page 8

SOIC ( REF CATHODE ANODE 2 7 ANODE ANODE 3 6 ANODE N N/C Top View D e E/2 1 INDEX AREA (D/2 X E1/2) A TOP VIEW SIDE VIEW DIMENSIONS 8 ...

Page 9

PIN SOT-23 Dimensions in (mm) JEDEC TO-236 (AB) Variation MIN NOM MAX A 0.89 A1 0.01 A2 0.88 0.95 b 0.30 c 0.08 D 2.80 2.90 e 0.95 BSC e1 1.90 BSC ...

Page 10

Ø1 Dimensions in (mm) 3 PIN SOT-89 MIN A 1.40 b 0.36 0.80 L 0.41 b1 0. 1.40 H 3.94 2. 1.45 2.90 e1 Date: 5/25/04 H ...

Page 11

W b DIMENSIONS 3 PIN TO-92 INCHES SYMBOL MIN NOM MAX A .170 b .014 E .130 .095 e e1 .045 L .500 .085 R .045 S1 W .016 D .175 4º a Date: 5/25/ ...

Page 12

... SPX431LN ........................... 1.0% .............. 2.495V .................................. 3-Pin TO-92 SPX431LN/TR ..................... 1.0% .............. 2.495V .................................. 3-Pin TO-92 SPX431LCM ........................ 2.0% .............. 2.495V ................................ 3-Pin SOT-23 SPX431LCM/TR .................. 2.0% .............. 2.495V ................................ 3-Pin SOT-23 SPX431LCM1 ...................... 2.0% .............. 2.495V ................................ 3-Pin SOT-89 SPX431LCM1/TR ................ 2.0% .............. 2.495V ................................ 3-Pin SOT-89 SPX431LCS ........................ 2.0% .............. 2.495V .................................. 8-Pin nSOIC SPX431LCS/TR .................. 2.0% .............. 2.495V .................................. 8-Pin nSOIC SPX431LCN ........................ 2.0% .............. 2.495V .................................. 3-Pin TO-92 SPX431LCN/TR .................. 2.0% .............. 2.495V .................................. 3-Pin TO-92 Available in lead free packaging. To order add “-L” suffix to part number. ...

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