The National Semiconductor (TI) LM26420YSQ is a dual synchronous buck regulator designed for high-efficiency power conversion. It integrates two independent buck converters in a single package, allowing for compact and efficient power supply designs.

Applications:

• Point-of-load (POL) regulators
• Notebook computers
• Graphics cards
• Networking equipment
• Industrial power supplies

Features:

• Dual synchronous buck regulators
• High efficiency
• Adjustable output voltage
• Internal compensation
• Overcurrent protection

Benefits:

• Compact power supply design
• Reduced component count
• Improved system efficiency
• Simplified design process
• Enhanced system reliability

Additional Details:

The LM26420YSQ features two independent synchronous buck regulators that can be configured to provide different output voltages. The high efficiency of the converters minimizes power losses and reduces heat generation. The adjustable output voltage allows for flexible adaptation to different load requirements. Internal compensation simplifies the design process and reduces the need for external components. Its switching frequency is generally high (e.g., 500 kHz to 1 MHz) to minimize the size of external components like inductors and capacitors.

The LM26420YSQ includes overcurrent protection to prevent damage to the regulator and the load in the event of a short circuit or overload condition. It also typically includes undervoltage lockout (UVLO) to ensure proper startup and prevent operation under low voltage conditions. The device is available in a small surface-mount package, making it suitable for space-constrained applications.

This regulator is commonly used in devices that require multiple voltage rails, such as laptops, desktops, and network devices. As with other National Semiconductor products, datasheets are available through Texas Instruments (TI) after the acquisition. Consult the latest TI datasheet for accurate specifications.