LM2595S-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2595S-12 is a SIMPLE SWITCHER power converter from Texas Instruments, originally developed by National Semiconductor. It is a monolithic integrated circuit designed as a step-down (buck) voltage regulator with an adjustable output range of 1.2V to 37V and a maximum output current of 1A. The device operates at a fixed switching frequency of 150kHz, allowing for the use of smaller filter components compared to lower-frequency designs. It accepts input voltages between 4.5V and 40V. The component features internal overcurrent protection and is housed in a TO-263-5 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage switch capable of driving 1A loads
• Fixed 150kHz switching frequency reduces external component size
• Internal thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient step-down DC-DC conversion
• Pre-regulator for linear regulators
• Battery-powered systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin carefully, as National Semiconductor was acquired by Texas Instruments. Confirm the specific suffix (e.g., NOPB) for lead-free compliance and RoHS status. Check current availability status, as older revisions may be discontinued or replaced by updated versions within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 1A buck converter is required with a wide input voltage range up to 40V. The fixed 150kHz frequency is suitable for applications prioritizing compact passive component sizes. Ensure the thermal design accommodates the TO-263-5 package dissipation requirements under expected load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2595 series of SIMPLE SWITCHER converters. While the base LM2595 offers adjustable outputs, the -12 suffix typically denotes a fixed 12V output variant in similar TI families, though datasheet verification is essential for this specific legacy designation. It sits below the higher-current LM2596 and LM2599 series in terms of output capability.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consider LM2595S-ADJ/NOPB for adjustable output needs. For higher current requirements, evaluate the LM2596S-12/NOPB (3A) or LM2599S-12/NOPB (3A). Verify pin compatibility and thermal performance before substituting.