ONSEMI NCV1117ST33T3G Fixed LDO Voltage Regulator, 3.3V 1A, SOT-223

The ONSEMI NCV1117ST33T3G is a high-performance, low-dropout (LDO) positive fixed voltage regulator from the NCP1117 series, designed to deliver a stable 3.3V output with a current capability exceeding 1A. Encased in a compact 3-pin SOT-223 surface-mount package, this component is engineered for reliability and precision in demanding electronic circuits.

It features a very low dropout voltage, with a maximum of just 1.2V at 800mA over the full operating temperature range, ensuring efficient operation even when the input voltage is close to the desired output. On-chip trimming achieves an exceptional output voltage accuracy of within ±1.0%, providing the stable reference required for sensitive applications. Comprehensive internal protection includes output current limiting, safe operating area (SOA) compensation, and thermal shutdown, safeguarding the regulator and your design from fault conditions.

A significant advantage of this regulator is that it has no minimum load requirement to maintain regulation, simplifying circuit design. It is qualified to the stringent automotive AEC-Q100 standard, making it suitable for rugged environments. Key performance characteristics include excellent long-term stability of 0.3%, minimal RMS output noise of 0.003% of Vout, and the ability to handle input voltages up to 20V.

Primary Applications

• Consumer and industrial equipment point-of-load regulation.
• Post-regulation for switching power supplies.
• Hard disk drive (HDD) controllers.
• Battery charger circuits.
• Automotive electronic systems (AEC-Q100 qualified).

With its robust feature set, precision output, and automotive-grade qualification, the NCV1117ST33T3G is an ideal choice for designers seeking a reliable, fixed-voltage LDO regulator for power management solutions.