Introduction to Diodes Inc AZ1117S-3.3E1
The AZ1117S-3.3E1 is a low dropout (LDO) voltage regulator manufactured by Diodes Inc. This device is a popular choice in various electronic applications due to its high efficiency, low noise, and compact design. It is primarily used to provide a stable output voltage, making it suitable for powering microcontrollers, analog devices, and other sensitive circuitry.
Key Specifications
| Parameter | Value |
|----------------------------|-------------------------|
| Input Voltage Range | 4.75V to 15V |
| Output Voltage | 3.3V |
| Dropout Voltage | 1.2V @ 800mA |
| Output Current | Up to 1.0A |
| Quiescent Current | 5mA |
| Temperature Range | -40°C to +125°C |
| Package Type | SOT-223 |
| Power Dissipation | 1.5W (with proper heat sinking) |
Electrical Characteristics
The AZ1117S-3.3E1 features a wide input voltage range from 4.75V to 15V, allowing it to adapt to various power sources easily. It produces a fixed output voltage of 3.3V, making it ideal for powering 3.3V components directly.
The dropout voltage, defined as the minimum difference needed between the input and output voltages for proper regulation, is relatively low at 1.2V when sourcing 800mA. This is particularly advantageous in battery-powered applications where efficiency is a concern.
Performance Features
The device has a current output capability of up to 1.0A, which is sufficient for many microcontroller and peripheral applications. It operates with a quiescent current of 5mA, which helps in minimizing power consumption during idle states.
The temperature range for the AZ1117S-3.3E1 is from -40°C to +125°C, making it suitable for use in automotive and industrial environments where temperature variances can be significant.
Thermal Considerations
Thermal performance is vital for any voltage regulator, especially when operating at high output currents. The AZ1117S-3.3E1 can dissipate approximately 1.5W, provided adequate heat sinking is utilized. This means careful thermal management is necessary to ensure reliable operation and longevity of the device.
Protection Features
The AZ1117S-3.3E1 includes several built-in protection features, such as:
- Overcurrent Protection: Prevents damage by limiting the output current to safe levels.
- Thermal Shutdown: Shuts down the regulator if the junction temperature exceeds a predetermined limit, ensuring safe operation under fault conditions.
- Input Overvoltage Protection: Protects against voltage spikes on the input, safeguarding the internal circuitry.
Applications
The AZ1117S-3.3E1 can be found in a wide array of applications, including but not limited to:
- Power supplies for microcontrollers and digital circuits
- RF and analog devices that require stable voltage
- Battery-operated devices needing efficient voltage regulation
- Automotive electronic systems where reliability is crucial
Conclusion
In summary, the Diodes Inc AZ1117S-3.3E1 is a versatile and efficient LDO voltage regulator that meets the needs of various electronic applications. Its combination of low dropout voltage, output current capability, and thermal performance makes it a reliable choice for both consumer and industrial products. The built-in protection features add an extra layer of safety, ensuring longevity and functionality in demanding environments.
