Overview
The LD1117SC-R, produced by STMicroelectronics, is a low dropout voltage regulator designed to provide a stable output voltage with high efficiency. This regulator is capable of delivering up to 800 mA of output current and is available in both fixed and adjustable output voltage versions. The fixed versions offer output voltages of 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V, while the adjustable version can be set using an external resistor network with a reference voltage (VREF) of 1.25 V. The LD1117SC-R is packaged in various formats including SOT-223, DPAK, SO-8, and TO-220, which optimize thermal characteristics and offer space-saving benefits.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (Fixed Versions) | 1.2, 1.8, 2.5, 3.3, 5.0 | - | - | V |
| Output Voltage (Adjustable Version) | 1.25 (VREF) | - | - | V |
| Output Current | 800 | - | 1300 | mA |
| Dropout Voltage | 1 | - | 1.2 | V |
| Quiescent Current | 5 | - | 10 | mA |
| Supply Voltage Rejection | 60 | 75 | - | dB |
| Operating Input Voltage | - | - | 15 | V |
| Output Noise Voltage | - | 100 | - | µV |
| Thermal Regulation | 0.01 | - | 0.1 | %/W |
Key Features
- Low Dropout Voltage: Typically 1 V, ensuring high efficiency.
- High Output Current: Up to 800 mA.
- Fixed and Adjustable Output Voltages: Fixed versions available in 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V; adjustable version with VREF = 1.25 V.
- Internal Current and Thermal Limiting: Built-in protection against overcurrent and overheating.
- Tight Output Voltage Tolerance: ±1% at 25°C and ±2% over the full temperature range.
- High Supply Voltage Rejection: Typically 75 dB.
- Low Quiescent Current: Typically 5 mA.
- Compact Packages: Available in SOT-223, DPAK, SO-8, and TO-220 packages for space-saving and improved thermal performance.
Applications
- Power Supply Systems: Ideal for use in various power supply systems requiring stable and efficient voltage regulation.
- Embedded Systems: Suitable for embedded systems, microcontrollers, and other electronic devices needing reliable voltage regulation.
- Automotive Electronics: Can be used in automotive applications due to its robust thermal and current handling capabilities.
- Industrial Control Systems: Applicable in industrial control systems where stable voltage is crucial for reliable operation.
- Consumer Electronics: Used in consumer electronics such as audio equipment, medical devices, and other applications requiring low dropout voltage regulation.
Q & A
- What is the maximum output current of the LD1117SC-R?
The maximum output current of the LD1117SC-R is up to 800 mA.
- What are the available fixed output voltages for the LD1117SC-R?
The fixed output voltages available are 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V.
- How does the adjustable version of the LD1117SC-R work?
The adjustable version uses an external resistor network to set the output voltage, with a reference voltage (VREF) of 1.25 V.
- What is the typical dropout voltage of the LD1117SC-R?
The typical dropout voltage is 1 V.
- What is the quiescent current of the LD1117SC-R?
The quiescent current is typically 5 mA.
- What is the supply voltage rejection of the LD1117SC-R?
The supply voltage rejection is typically 75 dB.
- In what packages is the LD1117SC-R available?
The LD1117SC-R is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- What is the operating input voltage range for the LD1117SC-R?
The operating input voltage range is up to 15 V.
- Does the LD1117SC-R have built-in protection features?
Yes, it has internal current and thermal limiting for protection against overcurrent and overheating.
- What is the output noise voltage of the LD1117SC-R?
The output noise voltage is typically 100 µV.
