onsemi

CAT6219-125TDGT3

CAT6219-125TDGT3 Description

The CAT6219-125TDGT3 is a fixed-output, low-dropout (LDO) linear voltage regulator from onsemi, designed to deliver a stable 1.25V output at up to 500mA of continuous current. With an input voltage range up to 5.5V, this regulator is optimized for low-power, high-efficiency applications where precise voltage regulation is critical. It features a low quiescent current of 75 µA (typical) and a low dropout voltage of 0.5V at full load, making it ideal for battery-operated devices. The device is housed in a compact TSOT23-5 package, suitable for space-constrained designs, and is available in Tape & Reel (TR) packaging for automated assembly.

CAT6219-125TDGT3 Features

• Fixed 1.25V Output: Ensures stable voltage for sensitive low-voltage circuits.
• High Efficiency: Low dropout (0.5V @ 500mA) minimizes power loss, extending battery life.
• Low Quiescent Current (75 µA): Reduces standby power consumption.
• Enable Control: Allows for power management via an external logic signal.
• Robust Protection: Includes over-current, over-temperature, and under-voltage lockout (UVLO) for enhanced reliability.
• High PSRR (64dB @ 1kHz): Excellent noise rejection for clean power delivery.
• Wide Input Range (Up to 5.5V): Compatible with various power sources, including Li-ion batteries.
• Surface-Mount TSOT23-5 Package: Compact footprint for space-sensitive applications.

CAT6219-125TDGT3 Applications

This LDO regulator is particularly suited for:

• Portable & Battery-Powered Devices: Smartphones, wearables, and IoT sensors benefit from its low quiescent current and high efficiency.
• Embedded Systems: Provides stable voltage for microcontrollers, FPGAs, and memory modules.
• Consumer Electronics: Ideal for audio/video equipment, where low noise and high PSRR are critical.
• Industrial & Automotive Systems: Reliable performance in harsh environments due to built-in protection features.

Conclusion of CAT6219-125TDGT3

The CAT6219-125TDGT3 is a high-performance LDO regulator offering low dropout, high efficiency, and robust protection in a compact package. Its low quiescent current and excellent PSRR make it a standout choice for battery-powered and noise-sensitive applications. While marked as obsolete, it remains a reliable solution for designs requiring stable 1.25V power with minimal overhead. Engineers should verify availability or consider alternative models from onsemi's portfolio for new designs.