KA431AZTA

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KA431AZTA

IC VREF SHUNT ADJ 1% TO92-3

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Especificaciones

Part Status Obsolete
Base Product Number KA431
Reference Type Shunt
Output Type Adjustable
Voltage - Output (Min/Fixed) 2.495V
Current - Output 100 mA
Tolerance ±1%
Temperature Coefficient 50ppm/°C Typical
Operating Temperature -25°C ~ 85°C (TA)
Mounting Type Through Hole
Package TO-226-3, TO-92-3 (TO-226AA) Formed Leads
Supplier Device Package TO-92-3
Packaging Tape & Box (TB)
Voltage - Output (Max) 36 V
Current - Cathode 1 mA

Descripción general

Description

KA431AZTA is a three‑terminal adjustable shunt regulator (programmable reference), similar to a TL431. It provides a precise reference around 2.495 V and uses an external resistor divider to set an output regulation point by sinking current from the cathode to the anode.
Key points:
- Pins: Cathode (K), Anode (A), Reference (REF).
- REF is held at ≈2.495 V; Vout is set by the resistor network from Vout to REF to ground: Vout ≈ Vref(1 + R1/R2) + Iref·R1.
- Used as a feedback reference in switcher and linear regulators, post-regulation, or overvoltage/clamp applications.
- The KA431AZTA code refers to a specific packaging/lot variant of the KA431 family; electrical specs (min/max currents, tolerance, tempco, impedance) vary by part and packaging—consult the datasheet for exact values.
In short, it’s a TL431-like precision reference used for adjustable regulation via external resistors.

Features

KA431AZTA is a TL431-compatible programmable precision shunt regulator (three-terminal: cathode, anode, reference).
Key features:
- Reference: 2.495 V
- Programmable output via external resistor divider (R1/R2) for adjustable regulation
- Can operate as an adjustable Zener or in error-amplifier feedback loops
- Regulation current: typically from about 1 mA (min) up to ~100 mA (max)
- Low dynamic impedance with good line and load regulation
- Wide working voltage: up to roughly 30–36 V
- Temperature stability with typical room-temperature accuracy around ±1% to ±2% (depends on grade)
- Available in compact packages (SOT-23-3, TO-92, etc.) for SMT and through-hole designs
Typical uses: voltage references, feedback references in DC-DC converters, linear regulators, and adjustable power supplies. For exact limits and tolerances, consult the specific KA431AZTA datasheet.

Package

TO-92 3-pin through-hole package (adjustable shunt regulator).

Pinout

3 pins. It is a programmable precision shunt regulator (TL431-compatible) with a 2.495 V internal reference. It acts as an adjustable Zener: by using an external resistor divider between output (cathode) and reference, it shunts current from cathode to anode to regulate the voltage at the set value. Pin functions: Reference, Anode, Cathode.

Manufacturer

KA431AZTA is not tied to a single original manufacturer. It’s a TL431-compatible adjustable shunt regulator, and the KA431 family is made by multiple semiconductor suppliers. The exact maker depends on the specific device you have (check the package marking, datasheet, or supplier).
In general, companies that produce these parts are semiconductor manufacturers that design and manufacture analog ICs (voltage references/shunt regulators) for electronic components and systems.

Application

KA431AZTA is a programmable precision shunt regulator (TL431-compatible). Common applications:
- Feedback reference in switch-mode and linear regulators
- Programmable zener/reference for voltage regulation
- Post-regulation and voltage monitoring circuits
- Overvoltage protection/crowbar schemes
- Battery charger regulation
- LED driver constant-current control
- General precision reference in instrumentation

Equivalent

KA431AZTA is a 2.495 V adjustable shunt regulator (TL431-compatible). Equivalents cross-referencing commonly used:
- TL431 (and TL431A/B/C)
- TLV431
- NCP431 (ON Semiconductor)
- LMV431 (various vendors)
- REF431 (Analog Devices)
- AZ431 / KA431 family cross (same device, different branding)
Note: verify pinout/package compatibility and bias current specs for your design.

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