Slkor SL7805: 5‑V 1A Positive Voltage Linear Regulator in TO‑220 Package

SL7805 is a three-terminal positive linear regulator in TO-220 package manufactured by Slkor. It delivers fixed 5V output with maximum continuous output current of 1A and peak output current up to 1.8A. Integrated protection functions include thermal overload shutdown, short-circuit current limiting and output-transistor safe-operating-area protection. The component is RoHS-compliant. It is widely used for post-regulation of switching power supplies and microprocessor power supply circuits. The operating junction temperature ranges from -20℃ to 150℃, and storage temperature ranges from -55℃ to 150℃, suitable for consumer and industrial electronic circuits.

I. Core Product Parameters

1. Output specifications: Fixed 5V output voltage; maximum continuous output current 1A; peak output current 1.8A; typical dropout voltage 2.0V. Minor output-voltage shift occurs with changing load, input voltage and junction temperature.
2. Input voltage: Maximum input voltage 35V.
3. Temperature conditions: Operating junction temperature from -20℃ to 150℃; storage temperature from -55℃ to 150℃.
4. Power dissipation: Power dissipation is internally limited. Actual allowable power dissipation depends on heatsink, PCB copper pattern and lead length.
5. Typical protection parameter: Typical short-circuit output current 250mA.
6. Quiescent current: Maximum quiescent current 8.0mA.
7. Noise and ripple: Features ripple-rejection capability; typical output noise voltage is 40μV.
8. Package: TO-220 package, RoHS-compliant.

II. Key Product Features

1. Fixed 5V DC output. Output-voltage deviation is kept within datasheet limits to meet requirements for most 5V powered circuits.
2. 1A maximum continuous output and 1.8A peak output, suitable for medium-and-small-power loads.
3. Multiple built-in hardware protections: thermal overload shutdown, short-circuit current limiting and output-transistor safe-operating-area protection, reducing risks of device damage under abnormal conditions.
4. RoHS-compliant, complying with material specifications for various electronic products.
5. Ripple-rejection performance suppresses AC ripple from input side and improves quality of DC output.
6. TO-220 mechanical structure supports external heatsink mounting for heat dissipation under high-power conditions.

III. Main Application Fields

1. High-efficiency linear regulator circuits working as independent regulating units to supply stable 5V DC power.
2. Post-stage regulation for switching power supplies to further filter and stabilize converter outputs.
3. 5-V power supply circuits for microprocessors, MCUs and other control chips.
4. 5-V power supply for motherboards and various circuit boards.

IV. Engineering Design Recommendations

1. Absolute maximum ratings are stress limits only. Continuous operation beyond these limits will cause permanent device damage.
2. Real steady-state usable output current is not fixed at 1A. It is affected by input voltage, heatsink selection, lead length and PCB copper area. Appropriate thermal solutions must be adopted for high-power operation.
3. Electrical-characteristic data are measured under pulse test conditions with initial junction temperature set at 25℃. Continuous-operation temperature variation will modify output voltage, dropout voltage and quiescent current. Adequate design margin should be reserved.
4. Input and output capacitors are recommended to improve transient response, reduce output noise and enhance system stability.
5. Thermal design should be emphasized. Higher case temperature lowers allowable power dissipation. Larger heatsinks or reduced load current are required for high-temperature environments.
6. Short-circuit triggers current-limit protection, yet long-term short-circuit operation shall be avoided to prevent sustained overheating.

V. Product Summary

SL7805 is a 5-V three-terminal positive linear regulator in TO-220 package, offering up to 1A output and comprehensive built-in protections. Its TO-220 package facilitates heatsink installation. This device serves well for 5-V linear regulation in consumer and industrial circuit boards and can be deployed for post-regulation after switching converters. In practical engineering, thermal conditions must be fully evaluated. Sufficient design margin considering operating temperature and load shall be reserved to avoid exceeding device limits and ensure long-term reliable equipment operation.

About Slkor：

Slkor has research and development offices in Busan, South Korea, Beijing, China, and Suzhou, China. Most of the wafer manufacturing and packaging and testing are carried out within China. The company employs and collaborates with individuals and organizations worldwide, with a laboratory for product performance and reliability testing and a central warehouse located at its headquarters in Shenzhen. Slkor has filed for over a hundred invention patents, offers more than 2,000 product models, and serves over ten thousand customers globally. Its products are exported to countries and regions including Europe, the Americas, Southeast Asia, and the Middle East, making it one of the rapidly growing semiconductor companies in recent years. With well-established management systems and streamlined workflows, Slkor has rapidly enhanced the brand awareness and reputation of its "SLKOR" brand through its outstanding quality and standardized services. Its product range includes three major series: diodes, transistors, and power devices, with recent introductions of new products such as Hall elements and analog devices, expanding its presence in sensors, Risc-v microcontrollers, and other product categories.

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