Overview
The L79L09ACUTR is a three-terminal negative voltage regulator produced by STMicroelectronics. This component is part of the L79L series, which is designed to provide fixed negative output voltages. The L79L09ACUTR specifically offers an output voltage of -9V and is capable of delivering up to 100 mA of output current. It features internal current limiting and thermal shutdown, making it essentially indestructible when adequate heat-sinking is provided. This regulator is ideal for various applications requiring local or on-card regulation to eliminate noise and distribution issues associated with single-point regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | STMicroelectronics | |
| Output Voltage (Fixed) | -9V | V |
| Output Current (Max) | 100 mA | mA |
| Input Voltage (Max) | -30 V | V |
| Quiescent Current (Iq) | 5.5 mA | mA |
| Supply Current (Max) | 6 mA | mA |
| Operating Temperature | 0°C to 125°C | °C |
| Protection Features | Over Temperature, Short Circuit | |
| Package / Case | SOT-89-3, TO-243AA | |
| Mounting Type | Surface Mount | |
| PSRR (Power Supply Rejection Ratio) | 44 dB (120 Hz) | dB |
Key Features
- Fixed negative output voltage of -9V
- Output current up to 100 mA
- Internal current limiting and thermal shutdown for enhanced reliability
- No external components required
- Thermal overload protection and short-circuit protection
- High power supply rejection ratio (PSRR) of 44 dB at 120 Hz
- Low quiescent current of 5.5 mA
- Surface mount packaging in SOT-89-3 and TO-243AA cases
Applications
The L79L09ACUTR is suitable for a wide range of applications, including:
- Local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation.
- Use with power pass elements to create high-current voltage regulators.
- Replacement for Zener diode/resistor combinations, offering improved output impedance, lower quiescent current, and lower noise.
- General-purpose negative voltage regulation in various electronic systems.
Q & A
- What is the output voltage of the L79L09ACUTR?
The output voltage of the L79L09ACUTR is -9V.
- What is the maximum output current of the L79L09ACUTR?
The maximum output current is 100 mA.
- What are the protection features of the L79L09ACUTR?
The L79L09ACUTR features over temperature and short-circuit protection.
- What is the operating temperature range of the L79L09ACUTR?
The operating temperature range is from 0°C to 125°C.
- What is the quiescent current of the L79L09ACUTR?
The quiescent current (Iq) is 5.5 mA.
- What is the power supply rejection ratio (PSRR) of the L79L09ACUTR?
The PSRR is 44 dB at 120 Hz.
- What type of packaging does the L79L09ACUTR come in?
The L79L09ACUTR comes in SOT-89-3 and TO-243AA packages.
- Is the L79L09ACUTR RoHS compliant?
Yes, the L79L09ACUTR is RoHS compliant.
- What is the moisture sensitivity level (MSL) of the L79L09ACUTR?
The MSL is 3 (168 hours).
- Can the L79L09ACUTR be used as a replacement for Zener diode/resistor combinations?
Yes, the L79L09ACUTR can be used as a replacement for Zener diode/resistor combinations, offering improved performance.
