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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 1% SOT23
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：1.24V
- Voltage - Output (Max)：10 V
- Current - Output：25 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-23-3
- Grade：-
- Qualification：-
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Overview
The ZR431LF01TA is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides an output voltage range between 1.24V and 10V, set via external resistors. The device features a 1% initial accuracy tolerance and a maximum temperature coefficient of 50ppm/°C. It operates within a cathode voltage range up to 10V and supports a recommended operating current from 0.1mA to 25mA. The component is housed in a surface-mount SOT-23 package.
Feature Summary
- Temperature compensated for operation over the full temperature range
- Programmable output voltage using two external divider resistors
- Totally lead-free and fully RoHS compliant
Applications
- Shunt Regulator
- Series Regulator
- Voltage Monitor
- Over Voltage/ Under Voltage Protection
- Switch Mode Power Supplies
Procurement Notes
Verify that the specific ordering suffix TA corresponds to the Tape & Reel packaging format with a quantity of 3000 units per reel. Confirm the marking code 43M indicates the 1% tolerance variant. Ensure the application circuit design accommodates the absolute maximum ratings, specifically the 10V cathode voltage limit and 50mA maximum current sink capability.
Selection Notes
Select this component when a low-cost, high-stability reference is required for feedback loops in switch mode power supplies generating 3V or 3.3V outputs. The 1% tolerance makes it suitable for applications demanding tighter regulation than standard zener diodes. Consider the SOT-23 package constraints for thermal management and board space limitations compared to through-hole alternatives.
Part Context
This part belongs to the ZR431L family of adjustable precision shunt regulators. It serves as a direct replacement for traditional zener diodes where improved performance characteristics are necessary. The device integrates internal temperature compensation to maintain stability across the specified operating temperature range.
Replacement Considerations
ZR431LF02TA (2.5% Tolerance)
FAQ
How is the output voltage determined?
The output voltage is programmable between 1.24V and 10V by selecting the values of two external divider resistors connected to the reference pin.
What is the minimum cathode current required for regulation?
The minimum cathode current for regulation is typically 100µA, though the datasheet specifies a test condition of 30µA to 100µA depending on the specific measurement criteria.
