78L05 5V Voltage Regulator IC

Description

Technical Overview of the 78L05 5V Voltage Regulator IC

The 78L05 5V Voltage Regulator IC is a compact, fixed-output positive voltage regulator designed for local on-card regulation. Housed in the space-saving TO-92 package, this IC is the ideal solution for applications where a stable 5V supply is required but board space is limited. It is specifically engineered to provide a clean 5V output from a higher-voltage DC source, making it the go-to choice for powering low-power microcontrollers, high-impedance sensors, and digital logic circuits. At BuyCircuitParts, we source high-quality 78L05 regulators to ensure your precision electronic designs stay powered and “on track.”

Key Specifications and Functional Parameters

78L05 5V Voltage Regulator IC

To ensure this regulator fits your power budget and circuit requirements, here are the primary technical parameters:

• Output Voltage: Fixed 5.0V.

• Output Current: Up to 100mA.

• Input Voltage Range: 7V to 30V (7.5V–20V recommended for maximum efficiency).

• Package Type: TO-92 (Three-pin through-hole).

• Quiescent Current: 3mA to 5mA.

• Internal Protection: Internal short-circuit current limiting and thermal overload protection.

• Operating Temperature: 0°C to +125°C.

Why Choose the TO-92 Package for 5V Regulation?

The 78L05 5V Voltage Regulator IC in the TO-92 package offers a strategic advantage in dense PCB layouts. While larger regulators are used for high-current loads, the 78L05 is optimized for low-current (up to 100mA) tasks where efficiency and size are paramount. Its linear architecture ensures an extremely low-noise output, which is critical for analog signal processing and sensitive sensor measurements. At BuyCircuitParts, our 78L05 regulators are selected for their reliable line and load regulation, ensuring that your 5V rail remains rock-solid even if the input voltage fluctuates.

Common Applications for the 78L05 IC

The 78L05 5V Voltage Regulator IC is a versatile power management tool used in various industries:

1. Sensor Powering: Providing a stable 5V reference for PIR sensors, temperature probes, and gas detectors.

2. Low-Power Microcontrollers: Supplying power to standalone chips like the ATtiny series or low-power PIC microcontrollers.

3. Local Regulation: Used on complex PCBs to regulate voltage locally for specific ICs, reducing noise interference from long power traces.

4. Signal Conditioning: Powering operational amplifiers (Op-Amps) and comparators in analog signal paths.

5. Consumer Electronics: Stepping down battery voltages (9V or 12V) to power internal 5V logic in handheld devices.

[Image showing a 78L05 circuit diagram with 0.33uF and 0.1uF bypass capacitors]

Pro-Tips for Circuit Integration

To maximize the performance and longevity of your 78L05 5V Voltage Regulator IC, follow these professional tips:

• Capacitor Choice: For stability and noise rejection, place a 0.33µF ceramic capacitor on the Input pin and a 0.1µF capacitor on the Output pin, as close to the TO-92 body as possible.

• Thermal Considerations: Even though it is rated for 100mA, the IC dissipates heat based on the voltage drop ($P = (V_{in} – V_{out}) \times I_{out}$). If you are dropping 24V to 5V, keep the current low to prevent the IC from getting hot.

• Pinout Awareness: Be careful! The pinout for the TO-92 version of the 78L05 is usually 1: Output, 2: Ground, 3: Input (when looking at the flat side with pins down). This is different from larger regulators.

• Minimum Dropout: Ensure the input voltage is at least 2V higher than the output (minimum 7V) to maintain a steady regulation.

Why Buy from BuyCircuitParts?

As a specialized seller, we understand that a voltage regulator is the heart of your circuit. At BuyCircuitParts, our 78L05 5V Voltage Regulator IC stock is sourced from reputable manufacturers to ensure accurate output levels and long-term durability. We provide the TO-92 variant with high-quality tinned leads that ensure excellent solder wetting. Our fast shipping and focus on genuine hardware help you avoid “voltage drift” issues and keep your production “on track.”

Durability and Stability

The 78L05 5V Voltage Regulator IC is built for industrial-grade reliability. Its internal circuitry is temperature-compensated, ensuring the output remains within tolerance across a wide range of conditions. Whether you are building a custom IoT node, a small audio project, or a lab-grade sensor interface, this regulator provides the steady power your electronics need. By choosing BuyCircuitParts, you are investing in power management components designed for long-term operational success.

📐 Approx Dimensions (TO-92 Package):
Height: ~4.5 mm (body), ~12 mm including leads
Width: ~4.0 mm
Lead Pitch: 1.27 mm (standard spacing)

🧊 Note:
Product colour and markings may vary slightly based on manufacturer and batch. Functionality is guaranteed. (Refer to the product image for illustration only. For precise specifications, consult the datasheet.) For detailed electrical characteristics and thermal derating curves, refer to the 78L05 Datasheet (PDF)

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