onsemi

MC33269DT-3.3  

Linear & Switching Voltage Regulators

MC33269DT-3.3 Description

The MC33269DT-3.3 is a fixed-output linear voltage regulator from onsemi, designed to deliver a stable 3.3V output with a maximum current capacity of 800mA. This surface-mount device (DPAK package) operates with an input voltage range up to 20V, making it suitable for a variety of power supply applications. With a low dropout voltage of 1.35V @ 800mA, it ensures efficient regulation even when the input voltage is close to the output level. The regulator features over-temperature and short-circuit protection, enhancing reliability in demanding environments. Although marked as obsolete, it remains a robust choice for legacy designs requiring dependable voltage regulation.

MC33269DT-3.3 Features

• Fixed 3.3V Output: Ensures stable voltage delivery for sensitive electronics.
• High Input Voltage Tolerance (20V): Accommodates wide input ranges, reducing the need for pre-regulation.
• Low Dropout Voltage (1.35V @ 800mA): Optimizes efficiency in low headroom conditions.
• 800mA Output Current: Supports moderate power loads, ideal for embedded systems.
• Protection Features: Includes over-temperature and short-circuit safeguards for enhanced durability.
• Low Quiescent Current (8mA): Minimizes power loss in standby modes.
• High PSRR (55dB @ 120Hz): Effectively suppresses input noise, ensuring clean output.
• DPAK Package: Suitable for space-constrained PCB designs.

MC33269DT-3.3 Applications

The MC33269DT-3.3 is well-suited for applications requiring reliable, low-noise voltage regulation, such as:

• Embedded Systems: Powering microcontrollers, sensors, and peripherals in industrial or automotive electronics.
• Consumer Electronics: Voltage stabilization in set-top boxes, routers, and audio equipment.
• Legacy Designs: Maintaining functionality in older systems where component replacement is limited.
• Battery-Powered Devices: Efficiently regulating voltage in portable equipment with varying input levels.

Conclusion of MC33269DT-3.3

The MC33269DT-3.3 offers a balance of performance, reliability, and protection features, making it a dependable choice for 3.3V power regulation in moderate-current applications. While obsolete, its high PSRR, robust protection mechanisms, and low dropout voltage ensure it remains viable for legacy and niche designs. Engineers seeking a proven linear regulator for noise-sensitive or space-constrained systems may find this component particularly useful.

MC33269DT-3.3 Documents

Download datasheets and manufacturer documentation for MC33269DT-3.3