Overview
The LD1117S50TR is a low drop voltage regulator produced by STMicroelectronics. This component is part of the LD1117 series, known for its versatility and high performance. The LD1117S50TR is specifically designed to provide a fixed output voltage of 5.0V and can supply up to 800 mA of output current. It is available in the SOT-223 package, which optimizes thermal characteristics and offers a space-saving design. The regulator features an NPN pass transistor, ensuring high efficiency by directing most of the quiescent current to the load, making it suitable for a variety of applications, including those that require precise voltage regulation and efficient power management.
Key Specifications
| Attribute | Value |
|---|---|
| Input Voltage - Max | 15V |
| Output Voltage Fixed | 5V |
| Output Current - Max | 800mA |
| Rated Power | 12W |
| Tolerance (%) | ±1% (at 25°C) |
| Operating Temp Range | 0°C to 125°C |
| Regulator Topology | Fixed |
| Quiescent Current | 10mA |
| No. of Outputs | Single |
| Output Noise | 100µV |
| Load Regulation | 15mV |
| Line Regulation | 10mV |
| Package Style | SOT-223 (TO-261-4, SC-73) |
| Mounting Method | Surface Mount |
Key Features
- Low dropout voltage (1 V typ.)
- Output current up to 800 mA
- Fixed output voltage of 5.0V
- Adjustable version availability (VREF = 1.25 V)
- Internal current and thermal limit
- Supply voltage rejection: 75 dB (typ.)
- On-chip trimming for tight output voltage tolerance (± 1% at 25°C)
- High efficiency due to NPN pass transistor, directing most quiescent current to the load
- Stability ensured with a standard 10µF capacitor
- Available in SOT-223, DPAK, SO-8, and TO-220 packages for various design needs
Applications
The LD1117S50TR is suitable for a wide range of applications that require precise voltage regulation and efficient power management. These include:
- Digital circuits and components requiring a stable 5V supply
- Battery-powered devices where extending battery life is crucial
- SCSI-2 active termination (for the 2.85V version)
- General power supply systems in electronic devices
- Compact and space-saving designs due to its SOT-223 and DPAK packages
Q & A
- What is the maximum output current of the LD1117S50TR?
The maximum output current of the LD1117S50TR is 800 mA.
- What is the fixed output voltage of the LD1117S50TR?
The fixed output voltage of the LD1117S50TR is 5.0V.
- What is the maximum input voltage for the LD1117S50TR?
The maximum input voltage for the LD1117S50TR is 15V.
- What package styles are available for the LD1117 series?
The LD1117 series is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- What is the quiescent current of the LD1117S50TR?
The quiescent current of the LD1117S50TR is 10mA.
- What is the operating temperature range of the LD1117S50TR?
The operating temperature range of the LD1117S50TR is 0°C to 125°C.
- What is the typical dropout voltage of the LD1117S50TR?
The typical dropout voltage of the LD1117S50TR is 1 V.
- Does the LD1117S50TR have internal current and thermal limits?
Yes, the LD1117S50TR has internal current and thermal limits.
- What is the supply voltage rejection of the LD1117S50TR?
The supply voltage rejection of the LD1117S50TR is 75 dB (typ.).
- What capacitor is required for stability in the LD1117S50TR?
A standard 10µF capacitor is required for stability in the LD1117S50TR.
