Slkor SL7824: 24V Output 1A TO‑220 Three‑Terminal Fixed Positive‑Output Linear Regulator

SL7824 is a three-terminal fixed positive-output linear regulator from the SL7805-SL7824 series, housed in TO-220 package with fixed 24V output voltage and maximum output current of 1A. The IC integrates multi-level protection functions including thermal-overload shutdown, short-circuit current limiting and output transistor safe-operating-area protection, and is RoHS-compliant. It is suitable for power-supply applications such as post-regulation of switching power supplies, microprocessors and mainboards. Proper thermal management is required for reliable long-term operation.

1. Key Product Parameters

1.1 Absolute Maximum Ratings

1. Input voltage: maximum 40V
2. Output current: maximum 1A
3. Junction temperature: maximum 150℃
4. Operating temperature range: -20℃ ~ 150℃
5. Storage temperature range: -55℃ ~ 150℃
6. Power dissipation: internally limited; actual usable power dissipation depends on thermal conditions

1.2 Electrical Characteristics (Test Conditions: TJ=25℃, VIN=33V, IOUT=0.5A)

1. Output voltage: minimum 23.04V, typical 24.0V, maximum 24.96V; output voltage range 22.80V-25.20V under input voltage 27V-38V
2. Load regulation: maximum 240mV across full load range; maximum 120mV for load from 0.25A-0.75A
3. Line regulation: maximum 240mV with input voltage variation
4. Quiescent current: maximum 8.0mA
5. Quiescent-current change: maximum 1.0mA with input voltage variation; maximum 0.5mA with load variation
6. Output noise voltage: typical 170µV, test frequency 10Hz-100KHz
7. Temperature coefficient of output voltage: typical -2.8mV/℃
8. Ripple rejection: typical 66dB, minimum 50dB at 120Hz
9. Peak output current: typical 1.8A
10. Short-circuit current: typical 250mA at input voltage 35V
11. Dropout voltage: typical 2.0V

1.3 Package

Package type: TO-220 through-hole package.

2. Core Product Features

1. Maximum output current reaches 1A for medium-power voltage-regulation requirements.
2. Fixed 24V positive output with controlled output-voltage range.
3. Integrated thermal-overload shutdown protection; protection activates when device temperature exceeds safe threshold.
4. Built-in short-circuit current limiting to clamp output current during short-circuit events.
5. Output-transistor safe-operating-area protection prevents device damage beyond safe operating conditions.
6. RoHS-compliant for environmental requirements.
7. Decent ripple-rejection performance to reduce interference from input ripple to output supply rail.

3. Main Application Fields

1. High-efficiency linear regulator serving as power-conversion unit for end-equipment.
2. Post-stage secondary regulation for switching power supplies to improve output voltage quality.
3. Power-supply circuits for microprocessors to deliver stable DC voltage.
4. Mainboard power supply for on-board 24V power branches.

4. Engineering Design Recommendations

1. Absolute maximum ratings define stress limits only. Continuous operation at absolute-maximum conditions shall be avoided. Exceeding maximum rated voltage causes permanent device damage.
2. Steady-state usable output current is affected by input voltage, heatsink specification, lead length and PCB copper area. Pulse-test results cannot be directly applied to continuous-working scenarios. Heatsinks are mandatory for high-power use cases.
3. Typical dropout voltage is 2.0V. Design shall reserve dropout margin above 2.0V between input supply and 24V output to maintain normal regulation.
4. Short-circuit current limiting is implemented, yet continuous short-circuit will generate persistent heat. Troubleshoot load faults promptly upon short-circuit instead of sustaining short-circuit status.
5. Device junction temperature must not exceed 150℃. Fully evaluate power consumption for thermal design. TO-220 package shall be fitted with proper heatsink to control case and junction temperature.
6. Place input and output capacitors as specified in datasheet to guarantee loop stability.

5. Product Summary

SL7824 is a TO-220 three-terminal linear regulator with fixed 24V positive output and up-to-1A output current. It integrates thermal shutdown, short-circuit current limiting and other protections and meets RoHS requirements. It targets medium-power 24V power supplies for switching-supply post-regulation, MCU and mainboard applications. This linear regulator has relatively large dropout voltage, and its actual load capacity heavily relies on thermal design. Thermal margin and dropout headroom shall be carefully considered in engineering deployment. Avoid operation beyond rated stress to ensure long-term reliability of power-supply systems.

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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