Overview
The LD1117AV33 is a low drop voltage regulator produced by STMicroelectronics. This regulator is capable of providing up to 1 A of output current and is available in a fixed output voltage of 3.3 V. It is part of the LD1117 series, which also includes adjustable versions with a reference voltage (VREF) of 1.25 V. The device is packaged in a TO-220-3 (TO-220AB) package, which is suitable for flange mounting and offers optimized thermal characteristics and space-saving benefits.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage - Max | 15 | V |
| Output Voltage - Fixed | 3.3 | V |
| Dropout Voltage - Max | 1.3 | V |
| Output Current - Max | 1 A | A |
| Rated Power | 12 W | W |
| Tolerance | ±2% (at 25 °C), ±4% (full temperature range) | % |
| Operating Temperature Range | 0 °C to 125 °C | °C |
| Quiescent Current | 5 mA (typ.) | mA |
| No. of Outputs | Single | |
| Output Noise | 100 µV | µV |
| Line Regulation | 6 mV | mV |
| Load Regulation | 10 mV | mV |
| Package Style | TO-220-3 (TO-220AB) | |
| Mounting Method | Flange Mount |
Key Features
- Low Dropout Voltage: 1.15 V typ. @ IOUT = 1 A, 25 °C
- Very Low Quiescent Current: 5 mA typ. @ 25 °C
- Output Current: Up to 1 A
- Fixed Output Voltage: 3.3 V, with other fixed versions available (1.2 V, 1.8 V, 2.5 V)
- Adjustable Version Availability: VREF = 1.25 V
- Internal Current and Thermal Limit: Built-in protection
- Stability: Only a 10 µF minimum capacitor required for stability
- High Supply Voltage Rejection: 80 dB typ. @ 25 °C
- Temperature Range: 0 °C to 125 °C
Applications
The LD1117AV33 is suitable for a variety of applications where a stable and efficient voltage regulation is required. These include:
- Power Supplies: For providing a stable output voltage in power supply units.
- Embedded Systems: In microcontroller-based systems where a reliable voltage source is necessary.
- Industrial Automation: For powering sensors, actuators, and other control devices.
- Consumer Electronics: In devices such as audio equipment, medical devices, and other electronic appliances.
Q & A
- What is the maximum output current of the LD1117AV33?
The LD1117AV33 can provide up to 1 A of output current.
- What is the fixed output voltage of the LD1117AV33?
The fixed output voltage of the LD1117AV33 is 3.3 V.
- What is the maximum dropout voltage of the LD1117AV33?
The maximum dropout voltage is 1.3 V.
- What is the operating temperature range of the LD1117AV33?
The operating temperature range is from 0 °C to 125 °C.
- What is the quiescent current of the LD1117AV33?
The quiescent current is typically 5 mA at 25 °C.
- What type of package does the LD1117AV33 come in?
The LD1117AV33 is packaged in a TO-220-3 (TO-220AB) package.
- Does the LD1117AV33 have an adjustable version?
Yes, the LD1117 series includes an adjustable version with a reference voltage (VREF) of 1.25 V.
- What is the minimum capacitor required for stability?
A minimum of 10 µF capacitor is required for stability.
- What is the supply voltage rejection of the LD1117AV33?
The supply voltage rejection is typically 80 dB at 25 °C.
- Is the LD1117AV33 suitable for high-temperature applications?
Yes, it operates within a temperature range of 0 °C to 125 °C.
