TL431AIDBZR Precision Programmable Shunt Reference

Specifications

Product Overview

The TL431AIDBZR is a Texas Instruments precision programmable shunt reference in the Power_Management category. It belongs to the TL431/TL432 family of three-terminal adjustable shunt regulators and provides an adjustable output voltage range from Vref to 36 V when set with two external resistors. The nominal reference voltage is approximately 2.5 V, with TL431I/TL432I electrical limits of 2440 mV minimum, 2495 mV typical, and 2550 mV maximum at VKA=Vref, IKA=10 mA, and TA=25°C.

This device is supplied in the DBZ SOT-23-3 package with a 2.90 mm x 1.30 mm nominal body size. The TL431x DBZ pinout assigns cathode to pin 1, reference to pin 2, and anode to pin 3. Recommended operating conditions specify cathode voltage from Vref to 36 V and continuous cathode current from 1 mA to 100 mA.

For design review, the device lists 0.2 ohm typical output impedance and 0.2 ohm typical, 0.5 ohm maximum dynamic impedance under the stated test conditions. Thermal data for the DBZ package includes 206°C/W junction-to-ambient resistance and 76°C/W junction-to-case top resistance.

Key Features

• Three-terminal adjustable shunt regulator function
• A-grade 1% reference tolerance at TA=25°C
• Adjustable output voltage from Vref to 36 V
• Approximately 2.5 V nominal reference voltage
• 1 mA to 100 mA sink current capability
• 0.2 ohm typical family output impedance
• DBZ SOT-23-3 package with 3 pins
• -40°C to 85°C operating free-air temperature
• Pin 1 cathode, pin 2 reference, pin 3 anode
• 0.2 ohm typical dynamic impedance under stated conditions

Typical Applications

• Adjustable shunt regulation
• Programmable voltage reference circuits
• Power management reference nodes
• Feedback reference networks
• 36 V cathode-voltage designs
• SOT-23-3 compact assemblies

Procurement Notes

When requesting a quote for TL431AIDBZR, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.

If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.

For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.