Slkor SL7815 Linear Regulator: 15V Output 1A TO‑220 Fixed Positive‑Output Voltage Regulator

SL7815 is a fixed positive-output linear regulator belonging to the SL7805-SL7824 series. It is packaged in TO-220 with maximum output current of 1 A and fixed 15 V DC output. The device integrates thermal-overload shutdown, short-circuit current limiting and output-transistor SOA protection. It delivers ripple-rejection performance for applications such as post-regulation for switching power supplies, microprocessor power supply and motherboard power circuits. This component is RoHS-compliant.

1. Core Product Parameters

1. Package Type: TO-220
2. Output Voltage: 15 V
3. Maximum Output Current: 1 A
4. Input Voltage Range: 17.5 V-30 V
5. Typical Dropout Voltage: 2.0 V
6. Maximum Quiescent Current: 8.0 mA
7. Typical Short-Circuit Output Current: 250 mA
8. Maximum Junction Temperature Rating: 150 ℃
9. Operating Temperature Range: -20 ℃ ~ 150 ℃
10. Storage Temperature Range: -55 ℃ ~ 150 ℃
11. Maximum Load Regulation of Output Voltage: 150 mV
12. Maximum Line Regulation of Output Voltage: 150 mV
13. RoHS Compliance: Yes

2. Key Product Features

1. Fixed 15 V output. This product series also covers multiple standard fixed-output levels ranging from 5 V to 24 V.
2. Maximum output current reaches 1 A to meet the requirements of medium-and-low-power DC power supply.
3. Built-in thermal-overload shutdown protection activates when junction temperature exceeds threshold to prevent thermal damage.
4. Integrated short-circuit current limiting function restricts output current under short-circuit conditions and reduces burnout risks.
5. Output-transistor safe-operating-area (SOA) protection prevents damage when the output transistor works beyond safe conditions.
6. Good ripple-rejection capability suppresses AC ripple interference from power input.
7. RoHS-compliant for electronic products requiring environmental certification.

3. Main Application Fields

1. High-efficiency linear regulated power supply for stable 15 V DC output.
2. Post-regulation for switching power supplies to improve output-voltage quality.
3. Power-supply circuits for microprocessors and their peripherals.
4. On-board power supply for computer motherboards and industrial control boards.
5. Internal 15 V power-supply circuits of various industrial equipment and instruments.

4. Engineering Design Recommendations

1. This device has dropout voltage. To guarantee regulation accuracy, input voltage shall be at least 2.0 V higher than output voltage. Input voltage shall never exceed the specified maximum rating.
2. Power dissipation occurs during operation. Proper heat sink must be fitted for TO-220 package according to actual power consumption. Sustained available output current depends heavily on heat-dissipation conditions.
3. Capacitors of recommended capacitance shall be fitted at input and output terminals to improve transient response and suppress oscillation. Refer to values suggested in datasheet.
4. Short-circuit protection is available, yet continuous long-term short-circuit operation is prohibited as it accelerates component aging.
5. Ambient and junction temperature shall stay within rated ranges. Derating is required for high-temperature working conditions.
6. Keep input-loop and output-loop traces as short as possible in PCB layout to minimize the impact of lead resistance on regulation performance.

5. Product Summary

SL7815 is a 1-A class fixed positive linear regulator with 15 V output in TO-220 package. It features comprehensive on-chip protection, stable output voltage and simple peripheral circuits. It is a widely-adopted component for traditional 15 V linear power-supply solutions. It is suitable for post-regulation of switching power supplies, microprocessor systems and industrial control boards. In practical engineering practice, proper thermal design and valid input-to-output dropout condition are essential to achieve full device performance.

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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