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Description: The SPX1431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate bandgap ref...


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SPX1431S General Description


The SPX1431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The SPX1431 acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX1431's thermal stability, wide operating current (150mA) and temperature range (-55°C to 125°C) makes it suitable for a variety of applications that require a low cost, high performance solution. SPX1431 tolerance of 0.4% 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 lines and contributes a significant cost savings.

The output voltage may be adjusted to any value between VREF and 36 volts with two external resistors. The SPX1431 is available in TO-92, SOIC-8, SOT-89, and SOT-23-5 packages.

SPX1431S Maximum Ratings

Cathode-Anode Reverse Breakdown VKA ...................................37V
Anode-Cathode Forward Current, (<10ms) IAK ............................1A
Operating Cathode Current IKA .............................................150mA
Reference Input Current IREF ...................................................10mA
Continuous Power Dissipation at 25°C PD
                 TO-92 ...................................................................775mW
                 SOT-23 ................................................................200 mW
                 SOIC-8 .................................................................750mW
                 SOT-89 ...............................................................1000mW
Junction Temperature TJ .......................................................150 °C
Storage Temperature TSTG ........................................-65 to 150 °C
Lead Temperature (Soldering 10 sec.) TL ..............................300°C

SPX1431S Features

Trimmed Bandgap Reference to 0.4%
Wide Operating Current 1mA to 150mA
Extended Temperature Range:-55°C to 125°C
Low Temperature Coefficient 30 ppm/°C
Offered in TO-92, SOIC, SOT-89,SOT-23-5
Improved Replacement in Performance for LT1431
Low Cost Solution

SPX1431S Typical Application

Battery Operating Equipment
Adjustable Supplies
Switching Power Supplies
Error Amplifiers
Single Supply Amplifier
Monitors / VCRs / TVs
Personal Computers

SPX1431S Connection Diagram

SPX1431S Connection Diagram

SPX1431S datasheet

SPX1431S
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