LM7905 -5V Negative Voltage Regulator IC (TO-220 Package)

The LM7905 -5V Negative Voltage Regulator IC is a three-terminal negative voltage regulator designed to provide a stable -5V DC output from a negative input voltage. It is widely used in dual power supplies, analog circuits, operational amplifier (Op-Amp) circuits, audio equipment, industrial electronics, and DIY projects. The LM7905 features built-in thermal overload protection, short-circuit protection, and safe operating area protection for reliable and stable operation.

Features

• Full Name: LM7905 -5V Negative Voltage Regulator IC
• Fixed -5V regulated output
• Output current up to 1A (with proper heat sink)
• Built-in thermal overload protection
• Short-circuit protection
• Excellent line and load regulation
• Low output noise
• TO-220 package for easy mounting
• Simple three-pin design
• Reliable and long service life

Specifications

Pin Configuration

When viewed from the front (text facing you, pins downward):

Note: The LM7905 has a different pin configuration from the 78xx series. The metal tab is internally connected to Ground (GND).

Applications / Uses

• Dual-polarity power supplies
• Operational amplifier circuits
• Audio amplifier circuits
• Analog signal processing
• Instrumentation equipment
• Industrial control systems
• Laboratory power supplies
• Embedded electronics
• DIY electronics projects
• Educational experiments

Advantages

• Stable -5V output
• Built-in safety protections
• Easy three-pin connection
• Reliable performance
• Low output noise
• Compact TO-220 package
• Suitable for hobby and industrial use

Size

• Package Type: TO-220
• Body Width: Approx. 10 mm
• Body Height: Approx. 15 mm
• Overall Height (with leads): Approx. 30 mm
• Lead Pitch: 2.54 mm
• Weight: Approximately 2 g

Package Includes

• 1 × LM7905 -5V Negative Voltage Regulator IC (TO-220)

Note: The LM7905 requires a negative input voltage to produce a regulated -5V output. It is commonly paired with an LM7805 to create a ±5V dual power supply for analog circuits, operational amplifiers, and audio applications. For higher output currents or larger input-to-output voltage differences, use a suitable heat sink to prevent overheating.