LM2596SX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2596SX-ADJ/NOPB is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, operating at a fixed 150 kHz switching frequency. It provides an adjustable output voltage range of 1.2 V to 37 V with a maximum output current of 3 A. The device accepts an input voltage between 4.5 V and 40 V and features a typical quiescent current of 5 mA. Designed for surface-mount applications, it utilizes the TO-263 (D2PAK) package. The regulator operates within a temperature range of -40 °C to +125 °C and includes internal frequency compensation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 150 kHz fixed-frequency oscillator with internal frequency compensation to minimize external component count.
• Includes TTL-compatible shutdown functionality for low-power standby modes with reduced quiescent current.
• Provides comprehensive protection against thermal overload and current limiting under specified conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Pre-regulators for switching regulators
• Efficient straight-through DC/DC converters

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'SX' indicates the specific D2PAK (TO-263) surface-mount package variant distinct from standard 'S' or through-hole 'T' versions. Confirm the 'NOPB' designation ensures compliance with RoHS standards and absence of lead-based plating. Cross-reference the manufacturer part number with official Texas Instruments documentation to ensure correct pinout and thermal pad configuration for the intended PCB layout.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-efficiency buck converter is required for loads up to 3 A with an input voltage up to 40 V. The adjustable output allows flexibility for various system rails. Ensure the design accommodates the TO-263 package thermal requirements. Consider the 150 kHz frequency trade-off between component size and efficiency compared to higher-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2596 family of SIMPLE SWITCHER regulators, known for reducing design complexity through minimal external components. The LM2596 series is widely used in industrial and commercial applications requiring reliable step-down conversion. The SX variant specifically targets surface-mount assembly needs while maintaining the performance characteristics of the broader LM2596 line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2596S-ADJ/NOPB (TO-263 package)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum input voltage required for the LM2596SX-ADJ/NOPB?

The minimum input voltage is 4.5 V.

Does the LM2596SX-ADJ/NOPB support external shutdown?

Yes, it features a TTL-compatible shutdown pin that reduces quiescent current significantly when activated.