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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.5% SOT23
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- 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 ZXRE250BSA-7 is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It features an initial reference voltage tolerance of ±0.5% at +25°C, with a typical reference voltage of 2.495V. The device supports an output voltage range from 2.5V to 36V and operates within a temperature range of -40°C to +125°C. It offers a very low minimum cathode current for regulation of 40µA (typical) and can sink currents between 0.065mA and 100mA. The component is housed in an SOT-23 package.
Feature Summary
- Very low minimum cathode current for regulation
- Adjustable output voltage capability
- Low output noise characteristics
- Totally lead-free and fully RoHS compliant
Applications
- Optocoupler linearisers
- Shunt regulators
- Improved Zener diode replacement
- Variable reference circuits
Procurement Notes
Verify the specific ordering suffix 'B' confirms the 0.5% tolerance grade required for your design. Confirm the 'SA' suffix indicates the SOT-23 package type. Ensure the '-7' suffix matches the tape and reel packaging quantity needed. Check for any updated datasheet revisions or alternative part recommendations provided by the manufacturer.
Selection Notes
Select this component when a low-power shunt regulator with high accuracy is required. The B-grade variant provides tighter initial tolerance compared to the A-grade version. Consider the low minimum cathode current for battery-powered applications where standby power consumption must be minimized. Verify that the operating cathode current remains within the specified 0.065mA to 100mA range for stable regulation.
Part Context
This part belongs to the ZXRE25x series of adjustable precision shunt regulators from Diodes Incorporated. It serves as a direct electrical specification equivalent to industry-standard devices like the TL431 but distinguishes itself through significantly lower minimum cathode current requirements. The series includes variants with different tolerances and packages to suit various design constraints.
Replacement Considerations
Diodes Incorporated recommends using AP431SHA(B)N1TR-G1 as a replacement for the ZXRE250B(A)SA-7. Designers should consult the latest documentation to ensure pinout compatibility and performance equivalence when transitioning to the suggested substitute part number.
FAQ
What is the minimum cathode current required for regulation?
The typical minimum cathode current for regulation is 40µA, with a maximum specified value of 65µA.
How does the B-grade tolerance compare to the A-grade?
The B-grade device (ZXRE250B) has an initial reference voltage tolerance of ±0.5%, whereas the A-grade device has a tolerance of ±1.0%.
Is the device stable with large load capacitance?
The device is stable under all conditions with a load capacitance not exceeding 50pF, between 5nF and 20nF, or exceeding 300nF. With a cathode current not exceeding 5mA, it is stable with any load capacitance.
