SPX3431 Sipexoration, SPX3431 Datasheet

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SPX3431

Manufacturer Part Number
SPX3431
Description
Micropower 2.5V Precision Adjustable Shunt Regulator
Manufacturer
Sipexoration
Datasheet
FEATURES
PRODUCT DESCRIPTION
The SPX3431 is a 3-terminal Adjustable Shunt Voltage Regulator providing a highly accurate 0.5% bandgap reference. SPX3431 acts
as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX3431 thermal stability, wide operating
current (100mA) and temperature range (0°C to 105°C) makes it suitable for all variety of applications that are looking for a low cost
solution with high performance. SPX3431 tolerance of 0.5% is proven to be sufficient to overcome all the other errors in the
system to virtually eliminate the need for trimming in the power supply manufactures assembly line and contribute a big Cost
Savings.
In the standard shunt configuration, the combination of low temperature coefficient (T.C.), sharp turn-on characteristics, low output
impedance and programmable output voltage make this precision reference an excellent error amplifier.
The SPX3431 is a direct replacement for the SPX431 and TL431 in low voltage, low current applications. SPX3431 is also available
in SOT-89 and TO-92.
Voltage Tolerance ..................................0.5% & 1.0%
Wide Operating Current .................... 1mA to 100mA
Extended Temperature Range .......................... 105° ° ° ° C
Low Temperature Coefficient ........................30 ppm/°C
Offered in SOT-23, TO-92 & SOT 89
Low Output Noise
CATHODE
TO-92 (N)
1
Top View
ANODE
2
3
REF
Marking & pinout for
CATHODE
the 0.5% device
SOT-23
SPX3431
Top View
ANODE
PIN CONNECTIONS
REF
CATHODE
Marking & pinout for
the 1% device
Top View
SPX3432
ANODE
SOT-23
APPLICATIONS
REF
Adjustable Shunt Regulator
Battery Operating Equipment
Adjustable Supplies
Switching Power Supplies
Error Amplifiers
Single Supply Amplifier
Monitors / VCR / TV
Personal Computers
Micropower 2.5V Precision
CATHODE
pinout for all
1
Marking &
SPX3431
Top View
SOT-89
ANODE
devices
2
3
SPX3431
REF
Rev. 10/25/00

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SPX3431 Summary of contents

Page 1

... SPX3431 tolerance of 0.5% is proven to be sufficient to overcome all the other errors in the system to virtually eliminate the need for trimming in the power supply manufactures assembly line and contribute a big Cost Savings ...

Page 2

... ANODE (A) Rating 100 KA 1 REF P D 300 T 150 150 STG T 300 575° C/W 150° C/W 575° C/W 80° C/W 575° C/W 80° C/W SPX3431 Units °C °C °C Typical Derating 1.7 mW/°C 9.1 mW/°C 6.3 mW/°C Rev. 10/25/00 ...

Page 3

... REF TC in mV/°C = ∆ ∆V REF x 100 V at 25°C REF TC in %/°C = ∆ ∆V REF V at 25°C REF TC in ppm/°C = ∆T A SPX3431 = V and KA REF Unit Circuit µA 2 µ Ω Rev. 10/25/00 ...

Page 4

... Test Circuits REF K Figure 1a. Test Circuit REF REF R 2 Figure 1b. Test Circuit Figure 1c. Test Circuit 3 SPX3431 (OFF) Rev. 10/25/00 ...

Page 5

... Ordering No. SPX3431M SPX3431AM SPX3431M1 SPX3431AM1 SPX3431N SPX3431AN Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Main Offices: 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 935-7600 FAX: (408) 934-7500 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing ...

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