ONSEMI NCP1117DT33RKG Fixed LDO Voltage Regulator, 3.3V, 1A, TO-252

The ONSEMI NCP1117DT33RKG is a high-performance, positive low dropout (LDO) linear voltage regulator designed for stable and efficient power management. It is capable of delivering a consistent output current exceeding 1A with a maximum dropout voltage of just 1.2V at 800mA, ensuring reliable operation across a wide temperature range.

This fixed output version provides a precise 3.3V, which is trimmed on-chip to an accuracy of within ±1.0%, offering excellent stability for sensitive electronic circuits. The device operates with an input voltage range from 10V to 20V, making it highly versatile for various power supply designs.

Key Features and Protection

The regulator incorporates robust internal protection mechanisms to safeguard both the device and the application. These include output current limiting, safe operating area (SOA) compensation, and thermal shutdown, which prevent damage from overloads, short circuits, and excessive temperature.

A significant advantage of this fixed-voltage model is that it has no minimum load requirement, simplifying circuit design and ensuring stable operation even under very light loads. The device is constructed as a lead-free (Pb-free) component, complying with modern environmental standards.

Specifications and Applications

Presented in a compact, surface-mount TO-252-3 package (DPAK), it is ideal for space-constrained PCB layouts. With an operating temperature range of 0°C to 125°C, it is suitable for demanding industrial environments as well as consumer electronics.

Primary applications include:

• Power management subsystems in consumer electronics.
• Voltage regulation for microcontrollers, sensors, and digital logic.
• Industrial control systems requiring a clean, stable 3.3V rail.
• Any application needing a high-current, low-dropout linear regulator from a higher input voltage.

With