LM7909 Negative Voltage Regulator – Fixed -9V Output
8.00 EGP
The LM7909 is a three-terminal negative voltage regulator that provides a fixed -9V output with outstanding performance and reliability. It is widely used in power supply circuits for analog and digital devices that require a stable negative voltage source.
Description
🔧 Key Features:
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Fixed Output Voltage: -9V
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Output Current: Up to 1.5A (with proper heat sinking)
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Internal Thermal Overload Protection
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Short Circuit Current Limiting
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Output Transistor Safe-Area Compensation
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Low Quiescent Current
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Stable and Reliable Performance
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Drop-in Replacement for Standard -9V Regulators
📦 Specifications:
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Input Voltage Range: -11.5V to -35V
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Output Voltage Tolerance: ±2%
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Package Type: TO-220 (through-hole)
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Mounting Type: Through Hole
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Operating Temperature: 0°C to +125°C
⚙️ Applications:
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Dual-polarity power supplies
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Operational amplifier circuits
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Audio equipment
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Industrial and embedded systems
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Any circuit requiring a stable -9V regulated supply
📝 Notes:
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Requires external capacitors on the input and output for improved stability.
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Proper heat sink is recommended for high-current applications to prevent overheating.


















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