STMICROELECTRONICS LD1117S50TR LDO Voltage Regulator, 5V, 800mA, SOT-223

The STMICROELECTRONICS LD1117S50TR is a fixed low-dropout positive voltage regulator designed to deliver a stable 5V output with an output current of up to 800mA. Featuring an NPN pass transistor, this regulator achieves high efficiency by allowing the quiescent current to flow mostly into the load, minimising wasted power.

With a low dropout voltage of just 1V typical at 100mA, the LD1117S50TR is ideal for applications where the input voltage is close to the output voltage, ensuring reliable regulation even with tight headroom. The device requires only a common 10µF capacitor for stability, simplifying circuit design and reducing component count.

Built-in safety features include internal current limiting and thermal protection, safeguarding the regulator and your circuitry from overcurrent and overheating conditions. On-chip trimming ensures a precise output voltage tolerance of ±1% at 25°C, making it suitable for demanding applications such as SCSI-2 active termination.

The regulator can handle an input voltage range from 6.5V to 15V and operates across a temperature range of 0°C to 125°C. Housed in a compact SOT-223 package with three pins, it is easy to mount on PCBs for space-constrained designs.

Key Specifications:

• Output Voltage: 5V
• Max Output Current: 800mA
• Dropout Voltage: 1.1V typical at 800mA
• Input Voltage Range: 6.5V to 15V
• Package: SOT-223

This regulator is a reliable and efficient solution for power management in electronic devices.