Overview
The L78L33ACZ is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78L series. These regulators are designed to provide stable output voltages with internal current limiting and thermal shutdown, making them highly reliable and essentially indestructible. The L78L33ACZ specifically offers an output voltage of 3.3V and is suitable for a wide range of applications requiring local or on-card voltage regulation.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | TJ = 25°C | 3.168 | 3.3 | 3.432 | V |
| Output Current (IO) | - | - | - | 100 | mA |
| Line Regulation (∆VO) | VI = 5.4 to 20 V, TJ = 25°C | - | - | 150 | mV |
| Load Regulation (∆VO) | IO = 1 to 100 mA, TJ = 25°C | - | - | 60 | mV |
| Quiescent Current (Id) | TJ = 25°C | - | 6 | - | mA |
| Output Noise Voltage (eN) | B = 10 Hz to 100 kHz, TJ = 25°C | - | - | 70 | µV |
| Supply Voltage Rejection (SVR) | VI = 6.3 to 20 V, f = 120 Hz, IO = 40 mA, TJ = 25°C | - | - | 41-49 | dB |
| Dropout Voltage (Vd) | - | - | - | 1.7 | V |
| Storage Temperature Range (TSTG) | - | -65 | - | 150 | °C |
| Operating Junction Temperature Range (TOP) | - | 0 | - | 125 | °C |
Key Features
- Internal current limiting and thermal shutdown for enhanced reliability and protection.
- No external components required for operation.
- Low quiescent current and low noise output.
- Available in various output voltages (3.3V, 5V, 6V, 8V, 9V, 10V, 12V, 15V, 18V, 24V).
- Short-circuit protection and thermal overload protection.
- High supply voltage rejection ratio (SVR).
- Compact packages including TO-92, SO-8, and SOT-89.
Applications
- Local or on-card voltage regulation to eliminate noise and distribution problems associated with single-point regulation.
- Replacement for Zener diode/resistor combinations, offering improvements in quiescent current and noise.
- Use with power pass elements to create high-current voltage regulators.
- General-purpose voltage regulation in various electronic devices and systems.
Q & A
- What is the output voltage of the L78L33ACZ?
The output voltage of the L78L33ACZ is 3.3V.
- What is the maximum output current of the L78L33ACZ?
The maximum output current is up to 100 mA.
- Does the L78L33ACZ require external components for operation?
No, the L78L33ACZ does not require external components for operation.
- What are the key protection features of the L78L33ACZ?
The key protection features include internal current limiting, thermal shutdown, and short-circuit protection.
- What is the quiescent current of the L78L33ACZ at 25°C?
The quiescent current at 25°C is 6 mA.
- What is the dropout voltage of the L78L33ACZ?
The dropout voltage is 1.7 V.
- What are the typical applications of the L78L33ACZ?
Typical applications include local or on-card voltage regulation, replacement for Zener diode/resistor combinations, and use with power pass elements.
- What are the available package types for the L78L33ACZ?
The available packages include TO-92, SO-8, and SOT-89.
- What is the operating junction temperature range for the L78L33ACZ?
The operating junction temperature range is from 0°C to 125°C.
- How does the L78L33ACZ improve upon Zener diode/resistor combinations?
The L78L33ACZ offers lower quiescent current and lower noise compared to Zener diode/resistor combinations.
