The KEC RE133-3.3A is a low dropout (LDO) linear regulator that delivers a stable 3.3V output voltage. Manufactured by KEC (Korea Electronics Co., Ltd.), it is designed to provide efficient and reliable power management for various electronic applications. The '3.3A' likely denotes a specific revision or variant of the RE133-3.3 with potentially improved characteristics or features compared to the base model.

Applications

• Portable Electronic Devices: Ideal for powering smartphones, tablets, and wearable devices.
• Microcontroller Power: Provides stable power for microcontrollers in embedded systems and IoT devices.
• Post-Regulation: Improves the stability and reduces noise in switching power supplies.
• Battery-Powered Systems: Suitable for applications requiring efficient power management from batteries.
• Consumer Electronics: Used in various consumer products requiring a stable 3.3V supply.

Features

• Low Dropout Voltage: Maintains regulation with minimal voltage difference between input and output.
• Fixed 3.3V Output: Provides a precise and consistent output voltage.
• Overcurrent Protection: Protects against excessive current draw and potential damage.
• Thermal Shutdown: Prevents overheating by shutting down the regulator when temperature exceeds a threshold.
• High Output Accuracy: Ensures a stable and reliable 3.3V output.
• Low Quiescent Current: Minimizes power consumption in standby mode, extending battery life.

Benefits

• Extended Battery Life: Low quiescent current maximizes battery runtime in portable applications.
• Increased Reliability: Overcurrent and thermal protection enhance the robustness of the regulator.
• Simplified Design: Fixed output voltage reduces the need for external components and simplifies circuit design.
• Stable Power Supply: Ensures consistent performance of electronic components by providing a stable voltage.
• Compact Size: Typically available in small surface-mount packages, suitable for space-constrained designs.

The RE133-3.3A is typically packaged in a SOT-23 or similar compact surface-mount package. The low dropout voltage characteristic allows it to operate efficiently even when the input voltage is close to the 3.3V output, which is particularly beneficial in battery-powered applications as the battery voltage decreases. The inclusion of overcurrent and thermal shutdown protection mechanisms enhances its reliability and protects the regulator and the connected circuitry from potential damage.

Designers should consult the official datasheet for the RE133-3.3A from KEC to obtain specific operating parameters, such as the input voltage range, maximum output current, thermal characteristics, and any specific differences compared to the RE133-3.3. This ensures optimal performance and reliable operation in the intended application.