NJM431E#

Overview

The NJM431E is an adjustable precision shunt regulator manufactured by Nisshinbo Micro Devices Inc. It operates within a cathode voltage range of VREF to 36V, with a maximum continuous cathode current of 100mA and a minimum operating current of 1mA. The reference voltage is typically 2.495V at 25°C, with a dynamic impedance of 0.2Ω typical. It supports bipolar technology and offers fast turn-on response.

Feature Summary

• Adjustable output voltage set between approximately 2.5V and 36V using two external resistors
• Fast turn-on response capability for efficient switching applications
• Low dynamic output impedance ensuring stable regulation under varying load conditions

Applications

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

Procurement Notes

Verify the specific package type (DIP8, DMP8, TO-92, or SOT-89) required for your design, as the NJM431 series spans multiple form factors. Confirm RoHS compliance status and check for any active lifecycle notices from Nisshinbo Micro Devices before finalizing procurement plans.

Selection Notes

Select based on required package style and thermal dissipation needs. Ensure the application circuit maintains cathode current between 1mA and 100mA for optimal performance. Consider the operating temperature range of -40°C to +85°C for environmental suitability.

Part Context

The NJM431 belongs to the legacy 431/432 series of shunt regulators offered by Nisshinbo Micro Devices. It utilizes bipolar technology and serves as a fundamental component for voltage referencing and regulation in analog circuits, often replacing similar industry-standard devices.

Replacement Considerations

Compatible alternatives include the TL431IP from Texas Instruments. Verify pinout compatibility and electrical specifications such as reference voltage tolerance and maximum current ratings when substituting.