The AZ1117CH-3.3TRG1 from Diodes Inc. is a low dropout linear regulator designed to deliver a high-quality power supply. It is optimized for applications that require a low input voltage and a stable output voltage. The regulator provides a current limit of 1.35A (typical) and features thermal shutdown protection to safeguard against excessive junction temperatures. The device's output voltage accuracy is maintained within ±1%, excluding the 1.2V version, ensuring reliable performance across various applications.
The AZ1117CH-3.3TRG1 supports a wide range of fixed output voltage versions (1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V) as well as an adjustable output version, allowing for flexibility in design. It is compatible with low ESR ceramic capacitors, enhancing its stability and noise performance. This regulator is available in multiple package options, including TO252-2 Series, SOT89, and SOT223, providing versatility for different design requirements.
Linear Voltage Regulators
Low dropout (LDO) linear regulators are a type of voltage regulator that can operate with a very small input-to-output voltage differential. They are widely used in applications where efficiency and simplicity are key, such as powering sensitive analog and digital circuits. LDOs are preferred in scenarios where the supply voltage is close to the output voltage, minimizing power loss across the regulator.
Choosing the right LDO requires consideration of several factors including dropout voltage, load current, package type, and additional features like thermal shutdown or current limiting. The dropout voltage is especially important as it determines the minimum voltage difference between input and output for the LDO to regulate effectively. Load current capacity is another critical parameter, as it defines the maximum current the LDO can supply to the load.
Thermal management is also an important aspect of LDO design. Devices like the AZ1117CH-3.3TRG1 incorporate thermal shutdown mechanisms to protect against overheating. When selecting an LDO, compatibility with the intended application's temperature range and the ability to dissipate heat efficiently should be considered.
Lastly, the choice of package type impacts both thermal performance and the physical integration of the LDO into the system. Smaller packages are beneficial for space-constrained applications but may require more careful thermal management. Features such as compatibility with low ESR capacitors can also influence the stability and noise performance of the LDO in the final application.