The AZ1117IH-3.3TRG1 by Diodes Inc. is a low dropout (LDO) linear regulator designed for applications requiring a low input voltage, high transient response, and minimal dropout. It features a current limit and thermal shutdown for protection against excessive power dissipation and ambient temperatures that could lead to high junction temperatures. This component is capable of delivering a fixed output voltage of 3.3V with an accuracy of ±1%, making it suitable for a wide range of applications.
The device is available in both SOT223 and TO252-2 packaging options, supporting various design requirements. It is optimized for use with low ESR ceramic capacitors, enhancing performance in terms of noise and stability. The AZ1117I series includes versions with fixed output voltages ranging from 1.2V to 5.0V, as well as an adjustable output version, providing flexibility for different power supply designs.
Voltage Regulator
Low Dropout (LDO) linear regulators are designed to provide a stable output voltage with a very low input-output voltage differential. They are essential components in battery-operated devices, where maximizing battery life is critical, and in applications requiring a stable voltage supply despite fluctuating input voltages. LDOs are widely used due to their simplicity, low cost, and ability to provide clean, low-noise output.
When selecting an LDO regulator, several factors should be considered, including dropout voltage, output voltage accuracy, quiescent current, and package type. The dropout voltage is particularly important in applications with a low input voltage, as it determines the minimum input voltage required to maintain the output voltage. Output voltage accuracy is critical for powering sensitive electronic devices, while quiescent current impacts battery life in portable applications. The package type affects the thermal performance and physical integration of the LDO into the system.
The AZ1117I series, including the AZ1117IH-3.3TRG1, offers a range of fixed and adjustable output voltages, making it suitable for a variety of applications. Its low dropout voltage, high PSRR, and integrated thermal shutdown feature make it an excellent choice for applications requiring reliable and efficient voltage regulation.