The AP4313 is a low voltage precision adjustable shunt regulator manufactured by BCD Semiconductor Manufacturing Limited. It's designed to provide a stable and accurate voltage reference, suitable for use in various power supply and voltage regulation applications. This shunt regulator offers a precise reference voltage and a wide operating current range, making it versatile for different circuit designs. It also integrates protection features to ensure reliable operation.

Applications

• Linear Regulators: Used as a voltage reference in linear regulators to provide a stable output voltage.
• Switching Power Supplies: Implements feedback control in switching power supplies for accurate voltage regulation.
• Voltage Monitoring: Provides a reference voltage for voltage monitoring circuits.
• Error Amplifiers: Used in error amplifier circuits to compare and adjust voltage levels.
• Precision Current Sources: Provides a stable reference for precision current sources.

Features

• Precision Reference Voltage: Provides a highly accurate reference voltage.
• Adjustable Output Voltage: The output voltage can be adjusted using external resistors.
• Low Operating Current: Operates with low quiescent current.
• Wide Operating Voltage Range: Operates over a wide range of input voltages.
• Over-Current Protection: Protects the regulator from over-current conditions.
• Thermal Shutdown: Protects the regulator from overheating by shutting it down when the junction temperature exceeds a safe level.

Benefits

• Stable Voltage Reference: Provides a stable and accurate voltage reference for various applications.
• Flexible Voltage Adjustment: Adjustable output voltage allows for customization to meet specific application requirements.
• Energy Efficiency: Low operating current minimizes power consumption.
• Robust Protection: Over-current and thermal shutdown features protect the regulator and the load from damage.
• Simplified Design: Simplifies the design process due to integrated protection features.

Additional Details

The AP4313 is available in various packages, including SOT-23 and TO-92. It operates over a temperature range of -40°C to +85°C. The reference voltage is typically 1.24V. The adjustable output voltage range is from 1.24V to 18V. External resistors are required to set the desired output voltage. The regulator requires a minimum cathode current for proper operation. The design should consider the thermal characteristics to ensure safe operation under different load conditions.