KA431AZTA

KA431AZTA is a three-terminal programmable shunt regulator in the KA431 family (TL431-class). It provides a precise reference and can regulate an output by sinking current through its cathode, using an external resistor divider to set the target voltage.
Key points:
- Three pins: cathode, anode, and reference (REF).
- Reference voltage ~2.495 V. The circuit keeps REF at this level by adjusting the cathode current via the resistor network from the output.
- External divider sets the regulated output voltage; typical operating current is in the milliamp to tens of milliamp range (designs vary—check the datasheet for exact I_K and I_Kmax).
- Characteristics: low dynamic impedance and good temperature stability for a TL431-like reference.
Common uses:
- Feedback/reference element in linear regulators and switch-mode power supplies
- Adjustable precision reference, error amplifier input, or protection circuits
For exact specs (tolerance, I_K range, Z_K, packaging), consult the KA431AZTA datasheet.

KA431AZTA is a 2.495 V programmable shunt regulator (TL431 family). Equivalents include:
- TL431 / TL431A / TL431B / TL431C
- TLV431
- LM431 / LM431B / LM431C
- LMV431
- NCP431 / NCP431A
- AZ431 (Diodes Inc)
- IL431 (Renesas)

KA431AZTA is a 3‑pin adjustable precision shunt regulator (TL431-compatible).
Key features:
- Reference voltage Vref ≈ 2.495 V (typical)
- Adjustable output via external resistor divider: Vout = Vref(1 + R1/R2) + Iref·R1
- Regulation current range: typically 1 mA to 100 mA (Imax ≈ 100 mA)
- Wide voltage across device up to about 36 V
- Low dynamic impedance; good line and load regulation
- Temperature range: roughly −40°C to +125°C
- Three pins: Anode, Cathode, Reference
- Suitable for precision references, programmable shunt regulation, and voltage feedback in power supplies
Note: exact packaging (AZTA) and some parameters may vary by lot; consult the datasheet for final design values.

- Pin count: 3 pins.
- Function: Adjustable precision shunt regulator (TL431-family). It provides a programmable reference (~2.495 V) and shunts current between cathode and anode to regulate voltage in feedback/regulation circuits. Pins are typically Reference/Adjust (REF/ADJ), Cathode (K), and Anode (A). Exact pin order depends on package—check the datasheet for the specific orientation.

KA431AZTA is manufactured by KA Semiconductor Co., Ltd. (KA Semiconductor). KA Semiconductor is a semiconductor company that designs and manufactures analog ICs and power-management devices (an integrated device manufacturer).

KA431AZTA is an adjustable precision shunt regulator (TL431-family). Applications:
- Programmable reference / programmable zener in feedback networks
- Error reference for linear and switching power supplies (often with opto-isolator)
- LED driver regulation
- Battery charger regulation
- Voltage reference for precision ADC/DAC circuits
- Overvoltage/current protection in regulator circuits
Typically wired with a resistor divider from output to the REF pin to set the desired output voltage.

KA431AZTA uses a TO-92 3-pin package (TO-92-3), tape‑and‑reel variant.