The SCJT1117B-3.3 is a low dropout (LDO) linear voltage regulator manufactured by Jiangsu Changjiang Electronics Technology Co., Ltd (JCET). It is designed to provide a stable and regulated 3.3V output voltage from a higher input voltage, even when the input voltage is close to the output voltage. This makes it suitable for a wide range of applications where a stable voltage supply is required, particularly in battery-powered and portable devices.

Applications

• Microcontroller Power Supply: Provides a stable 3.3V power supply for microcontrollers.
• Battery-Powered Devices: Used in portable devices such as mobile phones, tablets, and MP3 players.
• Post Regulation for Switching Regulators: Reduces ripple and noise from switching regulators.
• Power Management in Embedded Systems: Provides a stable voltage rail for sensitive components.
• Linear Regulation in Consumer Electronics: Used in TVs, DVD players, and other consumer devices.

Features

• Low Dropout Voltage: Operates with a small difference between input and output voltage.
• Overcurrent Protection: Protects the device and the load from excessive current draw.
• Thermal Shutdown Protection: Shuts down the output when the device temperature exceeds a safe limit.
• Short-Circuit Protection: Protects the device from damage due to short circuits.
• High Accuracy: Provides a precise and stable output voltage.

Benefits

• Improved System Reliability: Protection features prevent damage from overcurrent, short circuits, and overheating.
• Extended Battery Life: Low dropout voltage allows for efficient operation with a wide range of battery voltages.
• Reduced Noise and Ripple: Provides a clean and stable power supply for sensitive components.
• Simplified System Design: Requires minimal external components.
• Compact Size: Available in small surface-mount packages.

Technical Specifications

The SCJT1117B-3.3 provides a fixed output voltage of 3.3V. It is designed to handle a specific maximum input voltage and output current. It is available in surface mount packages, such as SOT-223. The datasheet from JCET contains detailed specifications including input voltage range, output current capability, dropout voltage characteristics, and thermal resistance.