The KEC RE133-3.3 is a low dropout (LDO) linear regulator designed for a wide range of applications requiring a stable and efficient voltage supply. This regulator is manufactured by KEC (Korea Electronics Co., Ltd.) and is intended for use in various electronic devices. The '3.3' in the part number indicates a fixed output voltage of 3.3V.

Applications

• Power management in portable devices: Used in smartphones, tablets, and other battery-powered devices.
• Microcontroller power supplies: Provides a stable voltage for microcontrollers in embedded systems.
• Post-regulation for switching power supplies: Improves the output ripple and noise performance of switching regulators.
• Battery-powered equipment: Ensures consistent performance in devices operating from battery sources.
• Consumer electronics: Commonly found in various consumer electronic products.

Features

• Low Dropout Voltage: Ensures regulation even with a small difference between input and output voltage.
• Fixed Output Voltage: Provides a precise and stable 3.3V output.
• Overcurrent Protection: Protects the regulator from damage due to excessive output current.
• Thermal Shutdown: Shuts down the regulator in case of overheating.
• High Accuracy: Delivers a precise output voltage, crucial for sensitive electronic components.
• Low Quiescent Current: Minimizes power consumption when the regulator is not actively supplying current.

Benefits

• Extended Battery Life: Low quiescent current improves battery runtime in portable devices.
• Reliable Performance: Overcurrent and thermal protection ensure robust operation.
• Simplified Design: Fixed output voltage simplifies the design process and reduces the number of external components required.
• Stable Voltage Supply: Provides a stable and accurate voltage for sensitive electronic components, ensuring proper functionality.
• Compact Solution: Available in small packages suitable for space-constrained applications.

The RE133-3.3 typically comes in a SOT-23 or similar small surface-mount package. Its low dropout voltage enables it to function efficiently even when the input voltage is close to the desired output voltage. This characteristic is particularly valuable in battery-powered applications where the battery voltage decreases over time. The regulator's protective features, such as overcurrent and thermal shutdown, contribute to its reliability and longevity.

The device is designed to operate within a specific range of input voltages, typically slightly above the 3.3V output voltage. The exact input voltage range and other detailed specifications can be found in the manufacturer's datasheet. Designers should consult the datasheet to ensure that the RE133-3.3 meets the requirements of their specific application.