MC78L05ACHT1G Introduction
The MC78L05ACHT1G is a compact and cost-effective positive voltage regulator. It belongs to the MC78L00A series, which is widely used in applications requiring a low-power regulated supply. Like its higher-current counterparts in the MC7800 and MC78M00 series, this regulator features internal current limiting and thermal shutdown.
One of the key advantages of the MC78L05ACHT1G is its simplicity, often requiring no external components in many applications. Compared to traditional zener diode-resistor voltage regulation, it offers lower output impedance and reduced quiescent current, resulting in improved efficiency and performance.
MC78L05ACHT1G Symbol
MC78L05ACHT1G Footprint
MC78L05ACHT1G 3D Model
MC78L05ACHT1G Pin Connections
VOUT (Output Voltage) – Provides a stable regulated output.
GND (Ground) – Common ground reference for input and output.
VIN (Input Voltage) – Accepts an unregulated input voltage
MC78L05ACHT1G Specification
| Parameter |
Value |
| Part Status |
Active |
| Output Voltage |
5V |
| Input Voltage Range |
30V |
| Output Current |
100mA |
| Quiescent Current |
6 mA |
| Line Regulation |
3mV/V |
| Operating Temperature |
0°C ~ 125°C |
| Current Limiting |
Yes |
| Package Type |
SOT-89-3 |
MC78L05ACHT1G Features
Wide Range of Available, Fixed Output Voltages
Low Cost
Internal Short Circuit Current Limiting
Internal Thermal Overload Protection
No External Components Required
Complementary Negative Regulators Offered (MC79L00A Series)
NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
These are Pb−Free Devices
MC78L05ACHT1G Applications
Power Supply Regulation
Microcontroller Powering
Battery-Powered Devices
Embedded Systems
Consumer Electronics
Industrial Automation
Automotive Electronics
Communication Equipment
MC78L05ACHT1G Schematic Diagram
MC78L05ACHT1G Standard Application
MC78L05ACHT1G Connection Guide
Connecting the MC78L05ACHT1G is straightforward. First, connect VIN (Pin 3) to your unregulated DC power source. Then, connect GND (Pin 2) to the ground of your circuit.
Next, take VOUT (Pin 1) and connect it to the circuit that needs a stable 5V power supply. If you want smoother performance and better stability, add a 0.33µF capacitor near VIN and a 0.1µF capacitor near VOUT to filter out noise. Now, your regulator is ready to go!
MC78L05ACHT1G Package
The MC78L05ACHT1G comes in a compact SOT-89-3 package, making it perfect for space-constrained designs. With its three-pin layout (VIN, GND, VOUT) and efficient heat dissipation, this package is ideal for low-power applications while keeping things simple and easy to work with.
FAQs
Does MC78L05ACHT1G require external components?
In many cases, it does not require external components, but small input and output capacitors are recommended to ensure stable operation.
What protection features does it have?
The MC78L05ACHT1G includes internal current limiting and thermal shutdown.
How does it compare to a Zener diode-based regulator?
Unlike a Zener diode-resistor setup, the MC78L05ACHT1G provides a more stable output voltage, lower quiescent current, and better load regulation.
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