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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 1% SOT23-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：0°C ~ 70°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 TL431ACL3T is an adjustable shunt voltage reference manufactured by STMicroelectronics, housed in a SOT-23-3 surface-mount package. It provides a programmable output voltage ranging from 2.5 V to 36 V using two external resistors. The device guarantees a tight initial tolerance of ±0.25% and operates with a cathode current range of 1 mA to 100 mA. It features a typical dynamic impedance of 0.2 Ω and maintains stability across an operating temperature range of -20°C to +70°C.
Feature Summary
- Adjustable output voltage capability between 2.5 V and 36 V via external resistor network
- High precision with guaranteed ±0.25% initial tolerance for accurate regulation
- Wide sink current operating range supporting applications from 1 mA to 100 mA
Applications
- Shunt regulator circuits requiring precise voltage control
- Switching power supply feedback loops
- General-purpose voltage reference sources
Procurement Notes
Verify the specific suffix ACL3T against official STMicroelectronics documentation to confirm the ±0.25% tolerance grade and industrial temperature range (-20°C to +70°C). Ensure the ordering code matches the required SOT-23-3 packaging format. Cross-reference datasheet revisions to confirm pinout consistency and electrical characteristics before finalizing procurement specifications.
Selection Notes
Select this component when high accuracy is critical, as indicated by the ±0.25% tolerance specification. It is suitable for designs requiring operation within the industrial temperature range rather than the extended automotive range found in other variants. Consider the SOT-23-3 footprint constraints and the need for external resistors to set the desired output voltage level.
Part Context
This part belongs to the TL431 family of programmable precision references. While the base TL431 offers standard precision, the TL1431 variant (which includes the TL431ACL3T) provides enhanced accuracy grades such as ±0.25%. This distinguishes it from lower-precision versions like the TL431IL3T, which typically feature wider tolerances around ±2.21%.
FAQ
What is the minimum operating cathode current for the TL431ACL3T?
The device operates effectively with a cathode current range starting from 1 mA.
Does the TL431ACL3T support automotive temperature ranges?
No, the TL431ACL3T is rated for an industrial temperature range of -20°C to +70°C. Automotive-grade versions typically extend to -40°C to +125°C.
