STMICROELECTRONICS LD1117V33 Fixed LDO Voltage Regulator, 3.3V, TO-220

The STMICROELECTRONICS LD1117V33 is a fixed output low dropout (LDO) positive voltage regulator, delivered in a 3-pin TO-220 package. Designed for high efficiency, this regulator utilises an NPN pass transistor, ensuring optimal performance in a wide range of power management applications.

The regulator provides a fixed output voltage of 3.3V with a typical dropout voltage of just 1.1V at an 800mA output current. It is capable of delivering an output current of up to 950mA and can accept an operating input voltage of 15V. The on-chip trimming ensures a very tight output voltage tolerance of ±1% at 25°C, with a 2% tolerance across the full temperature range.

Key Features

• Low dropout voltage: 1.1V at 800mA
• Output current: 950mA
• Operating input voltage: 15V
• Internal current and thermal limiting
• Supply voltage rejection: typically 75dB
• Operating junction temperature range: 0°C to 125°C

Applications

This voltage regulator is ideal for power management in electronic devices, offering a stable and reliable power supply for a variety of circuits. The NPN pass transistor design allows the quiescent current to flow into the load, and a minimum capacitor of 10µF is required for stability.

The LD1117V33 is a versatile and robust solution for your voltage regulation needs, ensuring consistent performance in demanding environments.