LM431BCZX

Product Overview

LM431BCZX is an onsemi shunt voltage reference IC intended for adjustable reference and regulation functions in power-management and analog circuits. The device specifies a minimum or fixed output voltage of 2.495 V, a maximum voltage of 36 V, and an output current capability of 100 mA. Its tolerance is ±1%, with a typical temperature coefficient of 50 ppm/°C. The device includes a 1 mA cathode current specification. It uses a through-hole TO-92-3 package and is rated for an ambient operating temperature range of -25°C to 85°C.

Key Features

• Shunt voltage reference architecture with adjustable output.
• Minimum or fixed output voltage specified at 2.495 V.
• Maximum output voltage of 36 V.
• Output current rating of 100 mA.
• Tolerance of ±1%.
• Typical temperature coefficient of 50 ppm/°C.
• Cathode current of 1 mA.
• Through-hole TO-92-3 package with formed leads.
• Ambient operating temperature range of -25°C to 85°C.

Applications

• Feedback networks in adjustable power supplies requiring a defined reference voltage.
• Shunt regulation circuits operating up to 36 V and 100 mA.
• Analog measurement circuits using a ±1% tolerance reference.
• Comparator threshold-setting circuits where a 2.495 V minimum reference is relevant.

Design & Procurement Notes

Design considerations include the 2.495 V minimum reference voltage, 36 V maximum output voltage, 100 mA output current, and 1 mA cathode current. The ±1% tolerance and 50 ppm/°C typical temperature coefficient affect reference accuracy over temperature. The through-hole TO-92-3 package supports board-level through-hole mounting, while the -25°C to 85°C ambient operating range should be checked against expected thermal conditions. Circuit designers should verify voltage headroom, load current, and package thermal behavior before finalizing the design.