Overview
The STMicroelectronics L78L33ABD-TR is a linear voltage regulator from the L78L series, designed to provide a fixed output voltage of 3.3V. This regulator is housed in an SOIC-8 package and is suitable for a wide range of applications requiring stable and regulated voltage. It features internal current limiting and thermal shutdown, making it robust and reliable. The L78L33ABD-TR is ideal for local or on-card regulation, helping to eliminate noise and distribution problems associated with single-point regulation.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | STMicroelectronics |
| Part Number | L78L33ABD-TR |
| Package | SOIC-8 |
| Output Voltage | 3.3V (Fixed) |
| Input Voltage Range | 8.3V to 30V |
| Output Current | Up to 100 mA |
| Quiescent Current | 6 mA (Typical at 25°C) |
| Line Regulation | 150 mV (Typical from 5.4V to 20V) |
| Load Regulation | 60 mV (Typical from 1 mA to 100 mA) |
| Dropout Voltage | 2 V (Typical) |
| Operating Temperature Range | -40°C to 125°C |
| Storage Temperature Range | -65°C to 150°C |
| Noise Voltage | 40 µV (Typical from 10 Hz to 100 kHz) |
| Supply Voltage Rejection | 49 dB (Typical at 120 Hz) |
Key Features
- Internal current limiting and thermal shutdown for enhanced reliability.
- No external components required for operation.
- Low dropout voltage of 2 V.
- Low quiescent current of 6 mA (typical at 25°C).
- High supply voltage rejection ratio of 49 dB at 120 Hz.
- Low noise output of 40 µV (typical from 10 Hz to 100 kHz).
- Compact SOIC-8 package.
- Rugged and reliable, suitable for various environmental conditions.
Applications
- Local or on-card voltage regulation to eliminate noise and distribution problems.
- Replacement for Zener diode/resistor combinations with lower quiescent current and noise.
- Use in power pass elements to create high-current voltage regulators.
- Embedded systems and IoT devices requiring stable and regulated voltage.
- Industrial control systems and automation.
- Consumer electronics and appliances.
Q & A
- What is the output voltage of the L78L33ABD-TR?
The output voltage of the L78L33ABD-TR is fixed at 3.3V.
- What is the maximum output current of the L78L33ABD-TR?
The maximum output current is up to 100 mA.
- What is the input voltage range for the L78L33ABD-TR?
The input voltage range is from 8.3V to 30V.
- Does the L78L33ABD-TR require external components for operation?
No, the L78L33ABD-TR does not require external components for operation.
- What is the quiescent current of the L78L33ABD-TR?
The quiescent current is typically 6 mA at 25°C.
- What is the dropout voltage of the L78L33ABD-TR?
The dropout voltage is typically 2 V.
- What is the operating temperature range of the L78L33ABD-TR?
The operating temperature range is from -40°C to 125°C.
- What is the noise voltage of the L78L33ABD-TR?
The noise voltage is typically 40 µV from 10 Hz to 100 kHz.
- What is the supply voltage rejection ratio of the L78L33ABD-TR?
The supply voltage rejection ratio is typically 49 dB at 120 Hz.
- In what package is the L78L33ABD-TR available?
The L78L33ABD-TR is available in an SOIC-8 package.
