Overview
The L78L08ACZ-AP, produced by STMicroelectronics, is a three-terminal positive voltage regulator from the L78L series. This regulator is designed to provide stable output voltages with internal current limiting and thermal shutdown, making it highly reliable and robust. It is available in various packages, including TO-92, SO-8, and SOT-89, and is suitable for a wide range of applications requiring local or on-card voltage regulation.
The L78L08ACZ-AP specifically provides an output voltage of 8V and can deliver up to 100 mA of output current. It requires no external components and offers features such as short-circuit protection and thermal overload protection, enhancing its durability and performance.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | TJ = 25 °C | 7.68 | 8 | 8.32 | V |
| Output Voltage (VO) | IO = 1 to 40 mA, VI = 10.5 to 23 V | 7.6 | 8 | 8.4 | V |
| Line Regulation (∆VO) | VI = 10.5 to 23 V, TJ = 25 °C | 175 | 225 | mV | |
| Load Regulation (∆VO) | IO = 1 to 100 mA, TJ = 25 °C | 80 | 100 | mV | |
| Quiescent Current (Id) | TJ = 25 °C | 6 | 6.5 | mA | |
| Output Noise Voltage (eN) | B = 10 Hz to 100 kHz, TJ = 25 °C | 70 | µV | ||
| Supply Voltage Rejection (SVR) | VI = 12 to 23 V, f = 120 Hz, IO = 40 mA, TJ = 25 °C | 37 | 44 | dB | |
| Dropout Voltage (Vd) | 1.7 | V | |||
| DC Input Voltage (VI) | VO = 8 V | 35 | V | ||
| Output Current (IO) | 100 | mA | |||
| Operating Junction Temperature Range | 0 | 125 | °C |
Key Features
- Internal Current Limiting and Thermal Shutdown: Ensures the regulator is essentially indestructible and protects against thermal and current overloads.
- No External Components Required: Simplifies the design and reduces the need for additional components.
- Short-Circuit Protection: Protects the regulator from short-circuit conditions.
- Low Quiescent Current: Minimizes power consumption when the regulator is not under load.
- Low Noise Output: Provides a stable and quiet output voltage, suitable for sensitive applications.
- High Supply Voltage Rejection: Ensures good regulation even with varying input voltages.
- Compact Packages: Available in TO-92, SO-8, and SOT-89 packages, making it suitable for a variety of board designs.
Applications
- Local or On-Card Regulation: Ideal for eliminating noise and distribution problems associated with single-point regulation.
- Power Pass Elements: Can be used with power pass elements to create high-current voltage regulators.
- Zener Diode/Resistor Combination Replacement: Offers improvements in terms of lower quiescent current and lower noise compared to traditional Zener diode/resistor combinations.
- General Purpose Voltage Regulation: Suitable for a wide range of applications requiring stable and regulated voltage supplies.
Q & A
- What is the output voltage of the L78L08ACZ-AP?
The output voltage of the L78L08ACZ-AP is 8V.
- What is the maximum output current of the L78L08ACZ-AP?
The maximum output current is up to 100 mA.
- Does the L78L08ACZ-AP require any external components?
No, the L78L08ACZ-AP does not require any external components.
- What are the key protection features of the L78L08ACZ-AP?
The key protection features include internal current limiting, thermal shutdown, and short-circuit protection.
- What is the operating junction temperature range for the L78L08ACZ-AP?
The operating junction temperature range is from 0 to 125 °C.
- What are the available packages for the L78L08ACZ-AP?
The L78L08ACZ-AP is available in TO-92, SO-8, and SOT-89 packages.
- How does the L78L08ACZ-AP handle noise and regulation?
The L78L08ACZ-AP provides low noise output and high supply voltage rejection, ensuring good regulation even with varying input voltages.
- Can the L78L08ACZ-AP be used as a replacement for Zener diode/resistor combinations?
Yes, the L78L08ACZ-AP can be used as a replacement for Zener diode/resistor combinations, offering lower quiescent current and lower noise.
- What are some common applications for the L78L08ACZ-AP?
Common applications include local or on-card regulation, power pass elements, and general-purpose voltage regulation.
- What is the quiescent current of the L78L08ACZ-AP?
The quiescent current is typically 6 mA at 25 °C.
