Home > Industry Information > LD1117AS12TR: Performance And Application Of High-Efficiency Low-Voltage Linear Regulator
The LD1117AS12TR is a Low Dropout (LDO) linear regulator produced by STMicroelectronics and belongs to the LD1117 series. It can provide an output current of up to 1A,
featuring low step-down voltage, low quiescent current and high power supply rejection ratio, etc.
Low drop voltage: The typical value is 1.15V (at an output current of 1.2A at 25℃).
Low static current: The typical value is 5mA (at 25℃).
Output current: Maximum 1A.
Fixed output voltage: 1.2V.
Stability capacitor: Only 10µF is required to ensure stability.
High power supply rejection ratio: The typical value is 80dB.
Operating temperature range: 0℃ to 125℃.
Package type: SOT-223.
Low step-down voltage: The typical step-down voltage of LD1117AS12TR is 1.15V (at an output current of 1.2A at 25℃). Low step-down voltage means that when the input and output voltages are close,
the voltage regulator is more efficient and generates less heat, making it particularly suitable for battery-powered portable devices.
Low quiescent current: The quiescent current of this chip is only 5mA (at 25℃), which enables it to maintain low power consumption even in standby mode and extend battery life,
making it highly suitable for devices that need to operate for long periods.
High output current: The LD1117AS12TR can provide an output current of up to 1A, which is sufficient to meet the requirements of most low-power devices, such as microcontrollers, sensors, and small motors.
Fixed output voltage: The output voltage of this chip is fixed at 1.2V, which is suitable for circuits that require a stable low voltage.
The fixed output voltage design simplifies the circuit design and reduces the number of external components.
Internal protection function: The LD1117AS12TR integrates internal current limiting and thermal protection functions, which can effectively prevent overcurrent
and overheating damage, and enhance the reliability and safety of the system.
High power supply rejection ratio: The power supply rejection ratio (PSRR) of this chip is as high as 80dB, which can effectively suppress noise and ripple in the input power supply and ensure the stability of the output voltage.
Smartphones and tablets: Provide stable power for internal low-voltage components (such as microcontrollers and sensors), and extend battery life.
Portable audio equipment: Provides a stable 1.2V power supply for the audio amplifier to ensure clear sound quality.
Smartwatches: Provide low-power power for microcontrollers and sensors, extending the device's lifespan.
Microcontrollers and sensors: Provide a stable 1.2V power supply for low-power microcontrollers and sensors to ensure reliable system operation.
Small modules: Provide stable power supply for various small modules (such as Bluetooth modules, Wi-Fi modules) to ensure stable communication.
In-vehicle infotainment system: Provides stable power supply for in-vehicle infotainment systems (such as the central control screen and navigation system).
LED lighting system: Provides a stable 1.2V power supply for automotive LED lights to ensure the efficient operation of the lighting system.
Portable medical devices: Provide a stable low-voltage power supply for portable medical devices (such as blood glucose meters and portable electrocardiogram machines)
to ensure the reliability of the devices and the accuracy of the measurement data.
Monitoring equipment: Provide a stable power supply for medical monitoring equipment (such as blood pressure monitors and thermometers) to ensure their normal operation.
The D1117AS12TR is a high-performance low-step-down linear regulator. With its low step-down voltage, low quistatic current, high power supply rejection ratio and internal protection functions,
it is widely used in portable devices, embedded systems, industrial equipment, automotive electronics and medical devices, etc. It can provide stable and efficient power management solutions
for various low-power devices, ensuring the reliability and performance of the devices.
Industry Information
