LM78S40CN

Voltage Regulators - DC DC Switching Regulators Overview

The LM78S40CN is a universal switching regulator subsystem manufactured by Texas Instruments. It integrates essential control functions for switch-mode power supplies, including an oscillator, error amplifier, and output driver. Designed for versatile applications, it supports both step-down (buck) and step-up (boost) topologies. The component operates with a wide input voltage range and provides stable regulation through external passive components. It is housed in a standard DIP package suitable for through-hole mounting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates oscillator, error amplifier, and output driver for complete switching regulation
• Supports flexible buck and boost converter topologies
• Designed for universal input voltage ranges

Voltage Regulators - DC DC Switching Regulators Applications

• Step-down DC-DC converters
• Step-up DC-DC converters
• Universal input power supply designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific manufacturer source and date code when sourcing this legacy component. Confirm pin compatibility with original design requirements. Check for RoHS compliance status as manufacturing practices may vary across production eras. Ensure the supplier provides valid traceability documentation for critical applications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a monolithic solution for basic switching regulation is required without complex digital control. It is suitable for cost-sensitive designs where discrete controller ICs are unnecessary. Consider thermal management requirements for the integrated output driver. Evaluate external component selection for optimal efficiency in the chosen topology.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM78S40 family of switching regulator subsystems. It serves as a foundational building block for analog switch-mode power supplies. The CN suffix typically denotes a ceramic dual-in-line package variant. It represents an older generation of power management ICs predating modern synchronous rectification standards.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM78S40CN/NOPB. Modern equivalents may require additional external components or different control architectures. Verify functional compatibility regarding oscillator frequency and drive capabilities before substitution.