The KIA431BCM-RTK/HW is a precision adjustable shunt regulator manufactured by KEC. It is designed for applications requiring stable and accurate voltage regulation. This device is a three-terminal adjustable shunt regulator offering excellent temperature stability and a sharp turn-on characteristic, making it suitable for various voltage regulation and reference applications.

Applications

• Linear Regulators: Used as a precision voltage reference in linear regulators to provide a stable output voltage.
• Switching Power Supplies: Employed in switching power supplies for feedback control and voltage regulation.
• Voltage Monitoring: Utilized in voltage monitoring circuits to detect overvoltage or undervoltage conditions.
• Instrumentation: Used as a stable voltage reference in precision instrumentation equipment.
• Chargers: Incorporated into battery chargers to regulate the charging voltage and current.

Features

• Programmable Output Voltage: The output voltage can be adjusted to any value between Vref (typically 2.5V) and 36V with two external resistors.
• Low Dynamic Output Impedance: Provides stable regulation even with variations in input voltage and load current.
• Sink Current Capability: Can sink a wide range of currents, typically from 1mA to 100mA.
• Tight Tolerance: Offers a tight initial tolerance on the reference voltage, ensuring accurate voltage regulation.
• Low Temperature Coefficient: Maintains stable performance over a wide temperature range.

Benefits

• High Accuracy: Provides precise voltage regulation, ensuring stable operation of sensitive electronic circuits.
• Flexibility: Adjustable output voltage allows for use in a variety of applications with different voltage requirements.
• Stable Performance: Low dynamic output impedance and temperature coefficient ensure consistent performance under varying conditions.
• Simplified Circuit Design: Requires only a few external components for operation, simplifying circuit design and reducing cost.
• Reliability: Robust design ensures long-term reliability in demanding applications.

Additional Details

The KIA431BCM-RTK/HW operates by comparing its internal reference voltage (Vref) to a fraction of its output voltage, which is determined by the external resistor divider. When the output voltage is too low, the device sinks more current to pull it up; conversely, when the output voltage is too high, it sinks less current. This feedback mechanism ensures that the output voltage is maintained at the desired level.

Specifications:

• Reference Voltage (Vref): Typically 2.5V
• Operating Voltage Range: Vref to 36V
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOT-23