Overview
The LF33ABDT-TR is a very low-dropout voltage regulator from STMicroelectronics, designed to provide stable and efficient voltage regulation in various applications. This device is part of the LFXX series, known for its high performance and reliability. The LF33ABDT-TR is available in the DPAK package and is suitable for industrial and automotive environments due to its wide operating temperature range and AEC-Q100 qualification.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (V) | 3.234 | 3.3 | 3.366 | V |
| Output Tolerance (typ.) | ±1% | % | ||
| Output Current (A) | 0.5 | A | ||
| Operating Input Voltage (V) | 4.3 | 16 | V | |
| Dropout Voltage (V) | 0.2 | 0.35 | V | |
| Quiescent Current (OFF mode) | 50 | 100 | µA | |
| Quiescent Current (ON mode) | 0.5 | 1 | mA | |
| Operating Temperature (°C) | -40 | 125 | °C | |
| Supply Voltage Rejection (dB) | 80 | dB |
Key Features
- Very low-dropout voltage (0.45 V)
- Very low quiescent current (typ. 50 µA in OFF mode, 500 µA in ON mode)
- Output current up to 500 mA
- Logic-controlled electronic shutdown
- Internal current and thermal limit
- Stability with only 2.2 µF output capacitance
- Available in ±1% (AB), ±1.5% (AC), or ±2% (C) selection at 25 °C
- High supply voltage rejection (80 dB typ.)
- Wide operating temperature range from -40 to 125 °C
Applications
The LF33ABDT-TR is suitable for a variety of applications, including:
- Automotive systems: Qualified according to AEC-Q100, making it ideal for automotive environments.
- Industrial control systems: Reliable operation in harsh industrial conditions.
- Power supplies: Efficient voltage regulation for power supply units.
- Embedded systems: Low dropout voltage and low quiescent current make it suitable for battery-powered devices.
Q & A
- What is the output voltage of the LF33ABDT-TR?
The output voltage of the LF33ABDT-TR is 3.3 V with a tolerance of ±1%.
- What is the maximum output current of the LF33ABDT-TR?
The maximum output current is 500 mA.
- What is the operating temperature range of the LF33ABDT-TR?
The operating temperature range is from -40 to 125 °C.
- What is the dropout voltage of the LF33ABDT-TR?
The dropout voltage is typically 0.2 to 0.35 V.
- Is the LF33ABDT-TR suitable for automotive applications?
- What is the quiescent current in OFF mode?
The quiescent current in OFF mode is typically 50 µA.
- What is the supply voltage rejection of the LF33ABDT-TR?
The supply voltage rejection is typically 80 dB.
- What type of package is the LF33ABDT-TR available in?
The LF33ABDT-TR is available in the DPAK package.
- Does the LF33ABDT-TR have internal current and thermal limits?
- What is the minimum output capacitance required for stability?
The minimum output capacitance required for stability is 2.2 µF.
