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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 1% SOT23
- Series：-
- Mfr：Microchip Technology
- Package：Tube
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：1.24V
- Voltage - Output (Max)：20 V
- Current - Output：20 mA
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23
- Grade：-
- Qualification：-
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Overview
The LX432ISC is a low-voltage adjustable precision shunt regulator manufactured by Microsemi. It features an internal reference voltage of 1.24V, allowing the output voltage to be set between 1.24V and 20V using two external resistors. The device operates with a minimum cathode current of 80µA and offers a typical dynamic impedance of less than 250mΩ. Designed for industrial temperature ranges, it functions reliably from -40°C to +85°C. The LX432ISC is housed in a 3-lead SOT-23 package.
Feature Summary
- Provides a stable 1.24V internal reference voltage for precise regulation
- Enables adjustable output voltage configuration via external resistor network
- Supports low operating currents suitable for micropower applications
- Offers low output impedance to enhance load regulation performance
Applications
- Low voltage adjustable power supplies
- Isolated feedback loops in power converters
- Portable equipment requiring micropower regulation
- Instrumentation circuits
Procurement Notes
Verify that the component matches the specific LX432ISC designation, which indicates the industrial temperature range (-40°C to +85°C) and SOT-23 packaging. Confirm the manufacturer origin as Microsemi or its successor entities, as the datasheet identifies this brand. Ensure the part is compatible with the intended circuit design regarding sink current capabilities and stability boundary conditions under load.
Selection Notes
Select the LX432ISC when a low-voltage precision shunt regulator is required for industrial environments. This variant is appropriate for designs needing operation down to -40°C. Consider the 80µA minimum cathode current requirement to ensure proper regulation during light load conditions. Verify that the application does not exceed the 20V maximum cathode-to-anode voltage rating.
Part Context
The LX432 series belongs to a family of low-voltage adjustable precision shunt regulators designed for portable and micropower applications. These devices serve as direct alternatives to other industry-standard shunt regulators. The LX432ISC specifically denotes the version packaged in SOT-23 and qualified for extended industrial temperature ranges, distinguishing it from commercial variants.
Replacement Considerations
The datasheet explicitly lists the TLV431 and SC431L as direct alternative devices. When substituting, verify pinout compatibility and ensure the replacement meets the required temperature and voltage specifications.
