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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.5% SOT23-3
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：36 V
- Current - Output：40 µA
- 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 (TO-236)
- Grade：-
- Qualification：-
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Overview
The NCP431BISNT1G is a three-terminal programmable shunt regulator diode from onsemi, operating within the NCP431 series. It functions as a low temperature coefficient zener reference, adjustable from Vref to 36 V using two external resistors. The device features a typical voltage reference tolerance of ±0.5% at 25°C and an equivalent full-range temperature coefficient of 50 ppm/°C. It supports a wide operating current range from 40 µA to 100 mA with a typical dynamic impedance of 0.22 Ω. Packaged in SOT-23-3, it operates over an ambient temperature range of -40°C to +85°C.
Feature Summary
- Programmable output voltage adjustable up to 36 V via external resistors
- High precision with ±0.5% initial accuracy and low temperature drift
- Low minimum operating current suitable for secondary regulators in SMPS adapters
- Temperature compensated operation across the full rated industrial temperature range
Applications
- Voltage adapters
- Switching power supplies
- Precision voltage references
- Battery chargers
- Instrumentation circuits
Procurement Notes
Verify the specific suffix ISNT against the official onsemi ordering table to confirm the 0.5% tolerance and -40°C to +85°C temperature range. Ensure the package matches the SOT-23-3 (TO-236) mechanical outline. Confirm RoHS compliance and Pb-Free status as indicated in the datasheet documentation before finalizing procurement specifications.
Selection Notes
Select this component when a precise, adjustable shunt reference is required with tight initial accuracy. The NCP431B variant offers superior tolerance compared to the A-series. Consider the low minimum cathode current for applications demanding minimal no-load consumption in switch-mode power supply feedback loops. Verify stability requirements regarding load capacitance and bias currents against the provided boundary curves.
Part Context
This part belongs to the NCP431/NCP432 family of programmable precision references. It serves as a direct replacement for standard Zener diodes in circuits requiring stable reference voltages. The B-suffix denotes the tighter ±0.5% tolerance grade, distinguishing it from the 1% tolerance A-suffix variants within the same SOT-23-3 package footprint.
Replacement Considerations
NCP431AISNT1G
FAQ
What is the pin configuration for the NCP431BISNT1G?
Pin 1 is Reference, Pin 2 is Cathode, and Pin 3 is Anode.
How is the output voltage programmed?
The output voltage is programmable from Vref to 36 V using two external resistors connected between the cathode and reference pins.
