NCP432BCSNT1G

Overview

The NCP432BCSNT1G is a three-terminal programmable shunt regulator diode from onsemi, operating as a low temperature coefficient Zener reference. It features an adjustable output voltage range from the internal Vref up to 36 V using two external resistors. The device exhibits a typical dynamic impedance of 0.22 Ω and supports a sink current capability ranging from 40 µA to 100 mA. Key electrical specifications include a reference voltage tolerance of ±0.5% at 25°C and a full-range temperature coefficient of 50 ppm/°C. It operates within a recommended cathode-to-anode voltage of Vref to 36 V and functions over an ambient temperature range of 0°C to +70°C.

Feature Summary

• Programmable precision reference with adjustable output voltage up to 36 V via external resistors
• Low minimum operating current enabling extremely low no-load consumption in secondary regulators
• Temperature compensated for stable operation across the full rated operating temperature range
• Low dynamic output impedance ensuring high stability and precise regulation

Applications

• Secondary side voltage adapters in switching power supplies
• Precision voltage references for instrumentation and digital voltmeters
• Constant current sources and sinks
• Op amp circuitry requiring stable biasing

Procurement Notes

Verify the specific suffix 'CSNT1G' corresponds to the SOT-23-3 package and the 0°C to +70°C industrial temperature grade. Confirm that the 'B' designation aligns with the required ±0.5% initial accuracy tolerance for your design. Ensure the ordering quantity matches the standard tape and reel packaging configuration provided by the manufacturer.

Selection Notes

Select this component when a programmable shunt regulator with tighter initial accuracy than the 'A' series is required. The NCP432B variant offers superior voltage tolerance compared to standard alternatives. Consider the low minimum operating current if minimizing standby power in SMPS applications is a priority. Verify that the SOT-23-3 package footprint fits the PCB layout constraints.

Part Context

This device belongs to the NCP431/NCP432 series of programmable precision references manufactured by onsemi. It serves as a direct replacement for traditional Zener diodes in circuits demanding higher stability and adjustability. The series includes variants with different accuracy grades and temperature ranges, such as the NCP431ACSNT1G which offers 1% tolerance.

Replacement Considerations

NCP431BCSNT1G