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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.5% SOT23-3
- Series：-
- Mfr：Semtech Corporation
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：30 V
- Current - Output：130 µA
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The SC431CSKQTRT is a three-terminal adjustable shunt regulator manufactured by Semtech Corporation. It features a trimmed bandgap design with an initial accuracy of ±0.5%. The device operates within a cathode current range of 130µA to 150mA and provides a low dynamic output impedance of 0.25Ω typical. The output voltage is adjustable from 2.5V to 30V using two external resistors. It is housed in a SOT-23-3 surface-mount package and supports an operating temperature range of -40°C to +85°C.
Feature Summary
- Trimmed bandgap architecture ensures high precision with ±0.5% initial accuracy
- Low dynamic output impedance of 0.25Ω typical for stable regulation
- Wide operating current range supporting applications from 130µA to 150mA
- Active output circuitry provides sharp turn-on characteristics replacing Zener diodes
Applications
- Adjustable power supplies
- Switching power supply feedback loops
- Linear regulators
- Battery-operated computers
- Instrumentation circuits
Procurement Notes
Verify the specific suffix 'Q' against official Semtech documentation to confirm if it denotes a qualified or automotive-grade variant, as standard datasheets may not explicitly detail this suffix's functional impact. Confirm RoHS compliance status and lead-free certification directly with the manufacturer or authorized distributors before procurement.
Selection Notes
Select this component when a precise, adjustable reference is required to replace standard Zener diodes in space-constrained designs. The SOT-23-3 package suits compact PCB layouts. Ensure the application requires an adjustable voltage range between 2.5V and 30V and can accommodate the necessary external resistor network for voltage setting.
Part Context
The SC431 series belongs to Semtech's portfolio of programmable precision references. It serves as a direct alternative to industry-standard components like TL431, LM431, and AS431. The series offers industrial temperature stability and is available in multiple packages including SOT-23-3 and SO-8, catering to diverse power management needs.
Replacement Considerations
Publicly confirmed substitutes include TL1431, TL431, LM431, and AS431. Verify pinout compatibility and electrical specifications such as dynamic impedance and operating current ranges when substituting these equivalent devices.
