TL431AIDBZR,215

TL431AIDBZR is a 3-pin programmable shunt regulator (adjustable reference) from the TL431 family. It acts like a precision adjustable zener with an internal error amplifier, enabling stable regulation in power supplies, LED drivers, and references.
Pinout: Anode (A), Cathode (K), Reference (R).
How it works: Connect a resistor divider from the output to the REF pin. The device sinks current at the cathode to keep the REF pin at Vref, ~2.495 V. The regulated output is set by Vout ≈ Vref(1 + R1/R2) + Iref·R1 (Iref is a small bias current).
Key specs (typical): Vref ≈ 2.495 V; VKA (max) ≈ 30–36 V; Cathode current range from min regulation current (≈1 mA) up to max (≈100 mA). Accuracy and temperature coefficient vary by grade; TL431A grades offer improved regulation at lower currents.
AIDBZR suffix notes: a specific RoHS-compliant package/version; “215” likely a date/lot code. For exact electricals and packaging, consult the TL431AIDBZR datasheet.

TL431AIDBZR-215 is TI’s 2.495 V adjustable shunt regulator in SOT-23 (DBZ). Common equivalents (2.495 V shunt references) from other vendors include:
- LM431 (National/TI)
- LMV431
- KA431
- AZ431
- REF431
- NCP431
- TLV431
Note: cross-references vary by vendor; check tolerances, tempco, and package specifics.

Here are the typical features of TL431AIDBZR (programmable shunt regulator):
- 2.495 V precision reference (Vref, typ)
- External resistor divider programs Vout: Vout ≈ Vref(1 + R1/R2) + Iadj·R1
- Adjustable output range from about 2.5 V up to ~36 V; cathode-anode voltage up to ~36–37 V
- Cathode current sink capability from ~1 mA up to 100 mA
- Low dynamic impedance and fast transient response
- Temperature range generally -40°C to 125°C (grade-dependent accuracy: A, B, C with tighter vs looser tolerance)
- RoHS-compliant 3-pin package (AIDBZR variant)
- Widely used as a programmable voltage reference, precision regulator feedback element, or shunt regulator in DC-DC and power-supply circuits
Note: Exact tolerance/accuracy depends on grade (A/B/C) and datasheet specification for this lot.

- Pin count: 3 pins (TL431 in a 3-pin package such as SOT-23-3; date code 215 is just packaging/lot).
- Function: Adjustable precision shunt regulator (programmable Zener). It keeps the reference input at ~2.495 V by shunting current between Cathode and Anode, using an external divider to set the output regulation.
- Typical pinout (SOT-23-3): Pin 1 = Reference (Vref), Pin 2 = Anode (A), Pin 3 = Cathode (K). (Always check the specific package drawing in the datasheet for exact orientation.)

Manufacturer: Texas Instruments (TI).
TI is an American multinational semiconductor company that designs and manufactures analog and mixed-signal integrated circuits and related semiconductor products.

TL431AIDBZR is a programmable precision shunt regulator with a 2.495 V reference. Common applications include:
- Regulation of output voltage in switch‑mode power supplies via optocoupler feedback
- Reference for linear regulators and ADC/DAC reference circuits
- Constant‑current LED driver circuits
- Battery chargers and portable power supplies
- Post‑regulation and voltage reference in telecom/instrumentation equipment
- Programmable fault-detection/voltage‑monitoring circuits
Note: External resistor divider sets the threshold; it can sink current to regulate and protect circuits.

SOT-23-3 (3-pin) package, RoHS-compliant, with Tape & Reel (suffix ZR).