Overview
The LF33CV is a very low drop voltage regulator with inhibit, manufactured by STMicroelectronics. This device is part of the LFXX series and is designed to provide a fixed output voltage of 3.3V with a maximum output current of 500mA. It is packaged in a TO-220-3 (TO-220AB) flange mount package, making it suitable for a variety of applications requiring low noise and low power consumption, particularly in battery-powered systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (Min) | 2.5 | V |
| Input Voltage (Max) | 16 | V |
| Output Voltage (Fixed) | 3.3 | V |
| Dropout Voltage (Max) | 0.7 | V |
| Output Current (Max) | 500 | mA |
| Tolerance | ±2% | |
| Operating Temperature Range | -40°C to +125°C | |
| Regulator Topology | Fixed | |
| Quiescent Current | 100µA | |
| No. of Outputs | Single | |
| Output Noise | 50µV | |
| Load Regulation | 16mV | |
| Line Regulation | 16mV | |
| Package Style | TO-220-3 (TO-220AB) | |
| Mounting Method | Flange Mount |
Key Features
- Very low dropout voltage (0.7V at 500mA)
- Very low quiescent current (typ. 50µA in OFF mode, 100µA in ON mode)
- Output current up to 500mA
- Logic-controlled electronic shutdown
- Internal current and thermal limit
- Only 2.2µF required for stability
- Available in ±1% (AB) or ±2% (C) selection at 25°C
- Supply voltage rejection: 80dB (typ.)
- Temperature range: -40°C to 125°C
- Automotive Grade product available in certain voltage options
Applications
The LF33CV is suitable for low noise, low power applications and is particularly useful in battery-powered systems. Its features make it ideal for use in various electronic devices that require stable and efficient voltage regulation.
Q & A
- What is the output voltage of the LF33CV?
The output voltage of the LF33CV is fixed at 3.3V.
- What is the maximum output current of the LF33CV?
The maximum output current of the LF33CV is 500mA.
- What is the dropout voltage of the LF33CV?
The dropout voltage of the LF33CV is 0.7V at 500mA.
- What is the quiescent current of the LF33CV?
The quiescent current of the LF33CV is typically 100µA in ON mode and 50µA in OFF mode.
- What is the operating temperature range of the LF33CV?
The operating temperature range of the LF33CV is -40°C to +125°C.
- What package style is the LF33CV available in?
The LF33CV is available in a TO-220-3 (TO-220AB) flange mount package.
- Does the LF33CV have internal protection features?
Yes, the LF33CV has internal current and thermal limit protection features.
- What is the supply voltage rejection of the LF33CV?
The supply voltage rejection of the LF33CV is 80dB (typ.).
- Is the LF33CV suitable for automotive applications?
Yes, certain voltage options of the LFXX series, including the LF33CV, are available as automotive grade products.
- What is the minimum capacitance required for stability?
The minimum capacitance required for stability is 2.2µF.
