LM2594N-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2594N-3.3/NOPB is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a 150 kHz, 0.5 A step-down voltage regulator. It operates with an input voltage range of 4.5 V to 40 V and provides a fixed 3.3 V output. The device utilizes a buck topology and is housed in an 8-pin PDIP package for through-hole mounting. It supports an operating temperature range from -40 °C to +125 °C and includes internal features such as a 5 mA typical quiescent current and a shutdown pin for low-power applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 150 kHz switching frequency eliminates the need for external oscillators or timing components
• Built-in thermal shutdown and current limiting protect against overload conditions
• Fixed 3.3 V output option simplifies design by removing external feedback resistors
• Shutdown capability allows for system power management and extended battery life

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power systems
• Pre-regulation stages for linear regulators
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems with wide input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' indicates lead-free and RoHS compliance when ordering. Confirm the 'N' designation corresponds to the PDIP-8 through-hole package rather than surface-mount variants. Ensure the specific sub-suffix matches the required fixed output voltage of 3.3 V. Cross-reference the manufacturer part number with official Texas Instruments documentation to confirm availability and revision status before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a reliable, cost-effective step-down solution is needed for currents up to 500 mA. It is suitable for designs requiring through-hole assembly and wide input voltage tolerance. Consider the thermal performance of the PDIP package under high load conditions. Compare with the LM2596 series if higher output current capabilities are required for the application.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2594 family of SIMPLE SWITCHER converters, designed for general-purpose DC-DC conversion. It shares architectural similarities with other members like the LM2594-ADJ but offers a fixed output variant. The family is known for simplicity and robustness in industrial and commercial environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2594N-3.3/NOPB serves as a direct replacement for older National Semiconductor versions. Check pin compatibility with legacy designs. Verify thermal requirements match the new package specifications.