NJM431M#

Overview

The NJM431M is a three-terminal adjustable precision shunt regulator manufactured by Nisshinbo Micro Devices Inc. It utilizes bipolar technology and operates within a cathode voltage range of VREF to 36V. The device features a reference voltage (VREF) typically set at 2495mV, with a minimum of 2440mV and a maximum of 2550mV under standard test conditions. It supports a continuous cathode current from 1mA to 100mA and maintains a low dynamic output impedance of 0.2Ω typical. The component is housed in an 8-pin DMP package and functions effectively across an operating temperature range of -40°C to +85°C.

Feature Summary

• Adjustable output voltage capability between the reference voltage level and 36V using external resistors
• Fast turn-on response characteristics for efficient switching applications
• Low dynamic output impedance ensuring stable regulation performance
• Bipolar technology construction providing robust operational reliability

Applications

• Shunt regulators
• Series regulators for small power supplies
• Isolation regulators utilizing photocouplers
• Constant current sources

Procurement Notes

Verify the specific package type and suffix requirements against the official datasheet before ordering. Confirm that the selected variant meets the necessary thermal dissipation limits for your ambient temperature conditions. Ensure compatibility with the required reference input current specifications. Check for any recent product change notices regarding manufacturing updates or availability status changes.

Selection Notes

Select this component when precise voltage referencing is required in compact surface-mount designs. The DMP-8 package offers a suitable footprint for space-constrained PCB layouts. Consider the thermal derating curves if operating near maximum power dissipation limits. Verify that the load regulation requirements align with the device's typical performance metrics.

Part Context

This part belongs to the NJM431 series of adjustable precision shunt regulators. The series includes variants such as NJM431D, NJM431U, and NJM431U-A, each offering different package options like DIP8, SOT-89, and DMP8. The NJM431M specifically denotes the version packaged in the DMP-8 format, maintaining the core electrical characteristics of the family while adapting to surface-mount assembly processes.

Replacement Considerations

NJM431SU-TE1 is listed as a similar alternative. TL431IP is also identified as a comparable substitute option.