STMicroelectronics LD1117DT33TR

The LD1117DT33TR is a low dropout linear voltage regulator that outputs a fixed voltage of 3.3V. It is designed to provide stable voltage output with a low input-output differential voltage, which is particularly useful when the input voltage is close to the desired output voltage. This component is often used in power management solutions for microcontrollers, sensors, and various digital circuits. Functions - Voltage Regulation: Maintains a steady output voltage (3.3V). - Low Dropout Operation: Allows operation with minimal difference between input and output voltages. - Current Handling: Typically allows for output current up to 1A. - Overcurrent Protection: Includes internal current limiting to protect against overcurrent conditions. - Thermal Shutdown: Protects the device from overheating. Applications - Power supply for microcontrollers and digital logic circuits. - Suitable for battery-powered devices due to low dropout features. - Used in power management systems in portable electronics. - Commonly found in consumer electronics, automotive systems, and industrial applications. Alternative Parts 1. LM1117: A similar LDO voltage regulator with options for fixed and adjustable outputs (not limited to 3.3V). 2. LM317: Another adjustable LDO voltage regulator that can be set for a variety of output voltages. 3. MIC5205: A low dropout voltage regulator with similar characteristics and low output voltage options. 4. LT1763: A low noise, LDO regulator with a fixed output option, designed for low power applications. Embedded Modules The LD1117 can be found in various embedded systems typically within: - Single-board computers: Such as Raspberry Pi or Arduino, where a stable 3.3V supply is needed. - Development kits: For microcontrollers, such as STM32 development boards. - Sensor nodes in IoT devices: Where low power and stable voltage supplies are critical. Related Q&A Q1: What is the maximum output current of the LD1117DT33TR? A1: The LD1117DT33TR can typically provide up to 1A of output current, depending on thermal conditions and application design. Q2: What input voltage range is acceptable for the LD1117DT33TR? A2: The recommended input voltage range is generally from 4.75V to 15V for the LD1117DT33TR. Q3: Can the LD1117DT33TR be used in battery-powered applications? A3: Yes, due to its low dropout voltage feature, it is suitable for battery-powered applications where the input voltage may be close to the 3.3V output. Q4: What are the thermal management features of the LD1117DT33TR? A4: The LD1117DT33TR includes thermal shutdown to prevent overheating and maintain reliability under high current or excessive temperature conditions. Q5: How does the dropout voltage impact the performance of the LD1117DT33TR? A5: The dropout voltage affects how close the input voltage can be to the output voltage. A lower dropout voltage allows for better efficiency, especially when the input voltage is marginally higher than 3.3V.